/* ============================================================
   YH portfolio — tech HUD theme, per-section environments, RWD
   ============================================================ */

:root {
    --bg: #05070d;
    --bg-elevated: rgba(10, 16, 28, 0.78);
    --bg-muted: rgba(18, 32, 52, 0.9);
    --text: #e8f4ff;
    --text-muted: #9bb3c9;
    --border: rgba(80, 220, 255, 0.22);
    --accent: #5ce1ff;
    --accent-2: #b794f6;
    --accent-strong: #2ee6a6;
    --accent-ink: #041018;
    --focus: #f0d48a;
    --shadow: 0 24px 60px rgba(0, 8, 20, 0.5);
    --radius: 4px;
    --header-h: 68px;
    --side-nav-w: 11.25rem;
    --font: "Figtree", "Segoe UI", sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, monospace;
    --space: clamp(1rem, 4vw, 2.25rem);
    --max: 1120px;
    --fx-cyan: rgba(92, 225, 255, 0.18);
    --fx-cyan-soft: rgba(92, 225, 255, 0.08);
    --fx-cyan-line: rgba(92, 225, 255, 0.07);
    --fx-purple: rgba(183, 148, 246, 0.16);
    --fx-magenta: rgba(255, 80, 160, 0.12);
    --fx-teal: rgba(46, 230, 166, 0.14);
    --fx-teal-dot: rgba(46, 230, 166, 0.28);
    --fx-amber: rgba(240, 212, 138, 0.12);
    --fx-amber-dot: rgba(240, 212, 138, 0.22);
    --panel-hero-bg: #050914;
    --panel-hero-bg-2: #071226;
    --panel-about-bg: #061410;
    --panel-about-bg-2: #08201c;
    --panel-projects-bg: #100816;
    --panel-projects-bg-2: #160c22;
    --panel-education-bg: #07111c;
    --panel-education-bg-2: #0a1a2c;
    --panel-experience-bg: #061816;
    --panel-experience-bg-2: #0a221c;
    --panel-certificates-bg: #141008;
    --panel-certificates-bg-2: #1c140c;
    --panel-contact-bg: #050b14;
    --footer-bg: #04060c;
    --dialog-bg: #0a1220;
    --portrait-bg: #02060c;
    --dialog-backdrop: rgba(3, 8, 16, 0.78);
    --fx-px: 0px;
    --fx-py: 0px;
    --star: color-mix(in srgb, #ffffff 80%, var(--accent));
    color-scheme: dark;
}

html[data-theme="light"] {
    --bg: #f3f6f9;
    --bg-elevated: #ffffff;
    --bg-muted: #e7eef4;
    --text: #122033;
    --text-muted: #4a6074;
    --border: rgba(15, 90, 120, 0.18);
    --accent: #0b6f8c;
    --accent-2: #5b21b6;
    --accent-strong: #0f766e;
    --accent-ink: #f4fdff;
    --focus: #0f766e;
    --shadow: 0 16px 36px rgba(20, 40, 70, 0.1);
    --fx-cyan: rgba(11, 111, 140, 0.12);
    --fx-cyan-soft: rgba(11, 111, 140, 0.08);
    --fx-cyan-line: rgba(11, 111, 140, 0.1);
    --fx-purple: rgba(91, 33, 182, 0.08);
    --fx-magenta: rgba(157, 23, 77, 0.07);
    --fx-teal: rgba(15, 118, 110, 0.1);
    --fx-teal-dot: rgba(15, 118, 110, 0.18);
    --fx-amber: rgba(146, 106, 16, 0.1);
    --fx-amber-dot: rgba(146, 106, 16, 0.16);
    --panel-hero-bg: #eaf3f8;
    --panel-hero-bg-2: #dde8f0;
    --panel-about-bg: #e8f3ee;
    --panel-about-bg-2: #dcebe4;
    --panel-projects-bg: #f2eef6;
    --panel-projects-bg-2: #e8e1f0;
    --panel-education-bg: #e8eef5;
    --panel-education-bg-2: #dce6ef;
    --panel-experience-bg: #e6f2eb;
    --panel-experience-bg-2: #d8eae1;
    --panel-certificates-bg: #f5f0e6;
    --panel-certificates-bg-2: #ece4d4;
    --panel-contact-bg: #eaf2f6;
    --footer-bg: #e4edf3;
    --dialog-bg: #ffffff;
    --portrait-bg: #d5e2eb;
    --dialog-backdrop: rgba(18, 36, 54, 0.42);
    --star: color-mix(in srgb, var(--accent) 45%, transparent);
    color-scheme: light;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    /* Align section top with the sticky header (height + border). Extra padding left a strip of the previous section. */
    scroll-padding-top: calc(var(--header-h) + 1px);
}

#home, #about, #projects, #education, #experience, #certificates, #contact {
    scroll-margin-top: 0;
}

html[data-lang="zh"] body {
    font-family: "Noto Sans TC", var(--font);
}

html[data-lang="zh"] .nav-list a,
html[data-lang="zh"] #nav-current-name,
html[data-lang="zh"] .eyebrow,
html[data-lang="zh"] .status-line,
html[data-lang="zh"] .btn,
html[data-lang="zh"] .competency-panel h3,
html[data-lang="zh"] .resume-block h3,
html[data-lang="zh"] .competency-group h4,
html[data-lang="zh"] .contact-label,
html[data-lang="zh"] .project-thumb,
html[data-lang="zh"] .dialog-body h3 {
    text-transform: none;
    letter-spacing: 0.04em;
}

html[data-lang="zh"] .hero-copy h1 {
    letter-spacing: 0.12em;
    font-family: "Noto Sans TC", sans-serif;
}

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    font-weight: 400;
    line-height: 1.65;
    min-height: 100vh;
    overflow-x: clip;
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: none;
    -webkit-hyphens: none;
    text-wrap: pretty;
}

.fx-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a { color: var(--accent); }

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -4rem;
    z-index: 10001;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 0.6rem 1rem;
    font-weight: 500;
    text-decoration: none;
}

.skip-link:focus { top: 0.75rem; }

main,
.site-footer {
    position: relative;
    z-index: 1;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(16px);
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    width: 100%;
    min-height: var(--header-h);
    padding: 0 max(var(--space), env(safe-area-inset-right)) 0 max(var(--space), env(safe-area-inset-left));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.header-start {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.logo {
    font-family: var(--mono);
    font-weight: 500;
    letter-spacing: 0.14em;
    text-decoration: none;
    color: var(--accent);
    font-size: 1rem;
    white-space: nowrap;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-shrink: 0;
    margin-left: auto;
}

.site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    bottom: 0;
    z-index: 28;
    width: var(--side-nav-w);
    padding: 1.4rem max(0.9rem, env(safe-area-inset-right)) 1.6rem max(1.15rem, env(safe-area-inset-left));
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow-y: auto;
    background: color-mix(in srgb, var(--bg) 72%, transparent);
    border-right: 1px solid var(--border);
    backdrop-filter: blur(16px);
}

.nav-current {
    margin: 0 0 1.35rem 0.15rem;
    font-family: var(--mono);
}

.nav-current-kicker {
    display: block;
    font-size: 0.64rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
}

#nav-current-name {
    display: block;
    margin-top: 0.2rem;
    color: var(--accent);
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}

.nav-list {
    --active-index: 0;
    --item-count: 7;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    list-style: none;
    margin: 0;
    padding: 0 0 0 0.15rem;
}

.nav-list::before,
.nav-list::after {
    content: "";
    position: absolute;
    left: calc(0.12rem + 4px);
    top: 0.85rem;
    width: 1px;
    pointer-events: none;
}

.nav-list::before {
    bottom: 0.85rem;
    background: var(--border);
}

.nav-list::after {
    height: calc(
        0.85rem + var(--active-index) * ((100% - 1.7rem) / (var(--item-count) - 1))
    );
    background: var(--accent);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 70%, transparent);
    transition: height 0.35s ease;
}

.nav-list a {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.58rem 0.4rem 0.58rem 1.05rem;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    white-space: nowrap;
    overflow-wrap: normal;
    word-break: normal;
    transition: color 0.25s ease, opacity 0.25s ease, background 0.25s ease;
}

.nav-list a::before {
    content: "";
    position: absolute;
    left: 0.12rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg);
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.nav-index {
    min-width: 1.35rem;
    font-size: 0.66rem;
    letter-spacing: 0.08em;
    opacity: 0.55;
}

.nav-list a:hover {
    color: var(--accent);
}

.nav-list li.is-past a {
    color: color-mix(in srgb, var(--text) 78%, var(--accent));
}

.nav-list li.is-past a::before {
    background: color-mix(in srgb, var(--accent) 55%, transparent);
    border-color: var(--accent);
}

.nav-list li.is-upcoming a {
    opacity: 0.58;
}

.nav-list li.is-active a,
.nav-list a[aria-current="page"] {
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    box-shadow: none;
}

.nav-list li.is-active a::before,
.nav-list a[aria-current="page"]::before {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--accent);
}

.nav-list li.is-active .nav-index,
.nav-list a[aria-current="page"] .nav-index {
    opacity: 1;
    color: var(--accent);
}

.nav-backdrop {
    display: none;
}

.icon-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text);
    border-radius: var(--radius);
    cursor: pointer;
    display: grid;
    place-items: center;
}

.icon-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lang-switch {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-elevated);
}

.lang-opt {
    min-width: 2.4rem;
    min-height: 2.5rem;
    padding: 0 0.55rem;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
}

.lang-opt + .lang-opt {
    border-left: 1px solid var(--border);
}

.lang-opt:hover,
.lang-opt[aria-pressed="true"] {
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
}

html[data-theme="light"] .site-header,
html[data-theme="light"] .site-nav {
    background: color-mix(in srgb, var(--bg) 86%, #ffffff);
}

html[data-theme="light"] .portrait-frame img {
    filter: none;
}

.theme-icon-sun,
html[data-theme="light"] .theme-icon-moon { display: none; }
html[data-theme="light"] .theme-icon-sun { display: block; }
.menu-toggle { display: none; }

@media (min-width: 1024px) {
    main,
    .site-footer {
        margin-left: var(--side-nav-w);
    }
}

@media (min-width: 1024px) and (max-width: 1240px) {
    :root { --side-nav-w: 10.75rem; }
    .nav-list a { font-size: 0.72rem; gap: 0.45rem; }
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 16px;
    height: 2px;
    background: currentColor;
    position: relative;
}
.hamburger::before,
.hamburger::after { content: ""; position: absolute; left: 0; }
.hamburger::before { top: -5px; }
.hamburger::after { top: 5px; }

/* ---------- Full-bleed tech panels ---------- */
.panel {
    position: relative;
    isolation: isolate;
    overflow: hidden;
}

.panel-fx {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.fx-orbs,
.fx-particles,
.fx-beam {
    position: absolute;
    inset: 0;
    display: block;
    pointer-events: none;
}

.fx-orbs {
    inset: -22%;
    filter: blur(28px);
    transform: translate(var(--fx-px), var(--fx-py));
    animation: orb-drift 14s ease-in-out infinite alternate;
    will-change: transform;
    opacity: 0.95;
}

.fx-geo {
    position: absolute;
    inset: 0;
    display: block;
    pointer-events: none;
    opacity: 0.55;
}

.fx-particles {
    transform: translate(calc(var(--fx-px) * 0.35), calc(var(--fx-py) * 0.35));
    background-image:
        radial-gradient(1.4px 1.4px at 8% 12%, var(--star), transparent),
        radial-gradient(1.2px 1.2px at 18% 44%, var(--star), transparent),
        radial-gradient(1.6px 1.6px at 27% 18%, var(--star), transparent),
        radial-gradient(1px 1px at 36% 62%, var(--star), transparent),
        radial-gradient(1.5px 1.5px at 47% 28%, var(--star), transparent),
        radial-gradient(1.2px 1.2px at 58% 74%, var(--star), transparent),
        radial-gradient(1.7px 1.7px at 69% 16%, var(--star), transparent),
        radial-gradient(1px 1px at 77% 48%, var(--star), transparent),
        radial-gradient(1.4px 1.4px at 86% 33%, var(--star), transparent),
        radial-gradient(1.3px 1.3px at 93% 68%, var(--star), transparent),
        radial-gradient(1.1px 1.1px at 12% 78%, var(--star), transparent),
        radial-gradient(1.5px 1.5px at 41% 88%, var(--star), transparent),
        radial-gradient(1.2px 1.2px at 63% 91%, var(--star), transparent),
        radial-gradient(1px 1px at 74% 81%, var(--star), transparent),
        radial-gradient(1.6px 1.6px at 4% 36%, var(--star), transparent);
    animation: twinkle 5.5s ease-in-out infinite;
}

.fx-particles::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 14% 22%, var(--star), transparent),
        radial-gradient(1.3px 1.3px at 31% 51%, var(--star), transparent),
        radial-gradient(1px 1px at 52% 9%, var(--star), transparent),
        radial-gradient(1.4px 1.4px at 71% 39%, var(--star), transparent),
        radial-gradient(1px 1px at 88% 14%, var(--star), transparent),
        radial-gradient(1.2px 1.2px at 24% 91%, var(--star), transparent),
        radial-gradient(1px 1px at 96% 86%, var(--star), transparent);
    opacity: 0.55;
    animation: twinkle 7s ease-in-out infinite reverse;
}

.fx-beam {
    mix-blend-mode: screen;
}

html[data-theme="light"] .fx-orbs {
    filter: blur(56px);
    opacity: 0.7;
}

html[data-theme="light"] .fx-beam {
    mix-blend-mode: multiply;
    opacity: 0.55;
}

/* Hero: star-grid + cyan scan sweep */
.panel-hero {
    background: color-mix(in srgb, var(--panel-hero-bg) 58%, transparent);
}

.panel-hero .panel-fx {
    background:
        radial-gradient(ellipse 70% 55% at 75% 20%, var(--fx-cyan), transparent 50%),
        radial-gradient(ellipse 50% 40% at 10% 90%, var(--fx-purple), transparent 46%);
}

.panel-hero .panel-fx::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--fx-cyan-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--fx-cyan-line) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 85%);
    animation: grid-drift 28s linear infinite;
}

.panel-hero .fx-orbs {
    background:
        radial-gradient(circle at 22% 28%, color-mix(in srgb, var(--accent) 70%, transparent), transparent 34%),
        radial-gradient(circle at 78% 18%, color-mix(in srgb, var(--accent-2) 65%, transparent), transparent 32%),
        radial-gradient(circle at 68% 78%, var(--fx-cyan), transparent 30%);
}

.panel-hero .fx-beam {
    left: -10%;
    right: -10%;
    height: 22%;
    background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--accent) 80%, transparent), transparent);
    opacity: 0.55;
    animation: scan 4.5s ease-in-out infinite;
}

.panel-hero .panel-fx::after {
    content: "";
    position: absolute;
    width: 180px;
    height: 2px;
    right: 8%;
    top: 14%;
    background: linear-gradient(90deg, transparent, var(--accent), #fff, transparent);
    box-shadow: 0 0 22px var(--accent);
    opacity: 0.95;
    animation: meteor 5.5s linear infinite;
}

.panel-hero .fx-geo {
    left: -15%;
    right: -15%;
    top: 38%;
    bottom: -35%;
    background:
        linear-gradient(var(--fx-cyan-line) 1px, transparent 1px) 0 0 / 56px 56px,
        linear-gradient(90deg, var(--fx-cyan-line) 1px, transparent 1px) 0 0 / 56px 56px;
    transform: perspective(520px) rotateX(62deg);
    transform-origin: center top;
    mask-image: linear-gradient(to bottom, transparent, #000 28%, #000 70%, transparent);
    animation: grid-rush 9s linear infinite;
    opacity: 0.7;
}

/* About: circuit nodes / teal mesh */
.panel-about {
    background: color-mix(in srgb, var(--panel-about-bg) 58%, transparent);
}

.panel-about .panel-fx {
    background:
        radial-gradient(circle at 15% 20%, var(--fx-teal), transparent 32%),
        radial-gradient(circle at 90% 80%, var(--fx-cyan-soft), transparent 28%);
}

.panel-about .panel-fx::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--fx-teal-dot) 1px, transparent 1.5px);
    background-size: 36px 36px;
    opacity: 0.45;
    animation: node-pulse 6s ease-in-out infinite;
}

.panel-about .panel-fx::after {
    content: "";
    position: absolute;
    inset: 12% 8%;
    border: 1px dashed var(--fx-teal);
    clip-path: polygon(0 8%, 8% 0, 100% 0, 100% 92%, 92% 100%, 0 100%);
    animation: frame-glow 8s ease-in-out infinite;
}

.panel-about .fx-orbs {
    background:
        radial-gradient(circle at 12% 70%, var(--fx-teal), transparent 28%),
        radial-gradient(circle at 88% 24%, var(--fx-cyan), transparent 30%);
}

.panel-about .fx-beam {
    background:
        linear-gradient(115deg, transparent 38%, color-mix(in srgb, var(--accent-strong) 80%, transparent) 50%, transparent 62%);
    background-size: 240% 100%;
    opacity: 0.32;
    animation: beam-sweep 6s linear infinite;
}

.panel-about .fx-geo {
    background:
        linear-gradient(90deg, var(--fx-teal-dot) 1px, transparent 1px) 12% 0 / 18% 100%,
        linear-gradient(var(--fx-teal-dot) 1px, transparent 1px) 0 28% / 100% 22%,
        linear-gradient(90deg, var(--fx-cyan-line) 1px, transparent 1px) 70% 0 / 14% 100%;
    mask-image: radial-gradient(ellipse at 30% 40%, #000 0 40%, transparent 75%);
    animation: circuit-flow 7s linear infinite;
    opacity: 0.45;
}

/* Experience: engineering docs / teal */
.panel-experience {
    background: color-mix(in srgb, var(--panel-experience-bg) 58%, transparent);
}

.panel-experience .panel-fx {
    background:
        linear-gradient(90deg, var(--fx-teal) 1px, transparent 1px) 0 0 / 72px 72px,
        linear-gradient(var(--fx-teal) 1px, transparent 1px) 0 0 / 72px 72px;
}

.panel-experience .panel-fx::after {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        90deg,
        transparent 0 63px,
        var(--fx-teal) 63px 64px
    );
    opacity: 0.4;
    animation: grid-drift 36s linear infinite reverse;
}

.panel-experience .fx-orbs {
    background:
        radial-gradient(circle at 30% 20%, var(--fx-teal), transparent 30%),
        radial-gradient(circle at 82% 76%, var(--fx-cyan-soft), transparent 32%);
}

.panel-experience .fx-beam {
    width: 28%;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--accent-strong) 85%, transparent), transparent);
    opacity: 0.4;
    animation: vscan 5.5s ease-in-out infinite;
}

.panel-experience .fx-geo {
    background-image: repeating-linear-gradient(
        180deg,
        color-mix(in srgb, var(--accent-strong) 70%, transparent) 0 3px,
        transparent 3px 18px
    );
    background-size: 100% 160px;
    mask-image: repeating-linear-gradient(90deg, #000 0 2px, transparent 2px 42px);
    animation: rain-fall 4.5s linear infinite;
    opacity: 0.28;
}

/* Projects: magenta HUD / isometric feel */
.panel-projects {
    background: color-mix(in srgb, var(--panel-projects-bg) 58%, transparent);
}

.panel-projects .panel-fx {
    background:
        radial-gradient(circle at 80% 10%, var(--fx-purple), transparent 35%),
        radial-gradient(circle at 10% 90%, var(--fx-magenta), transparent 32%);
}

.panel-projects .panel-fx::before {
    content: "";
    position: absolute;
    inset: -20%;
    background:
        repeating-linear-gradient(115deg, var(--fx-purple) 0 1px, transparent 1px 28px),
        repeating-linear-gradient(205deg, var(--fx-cyan-line) 0 1px, transparent 1px 28px);
    animation: grid-drift 40s linear infinite reverse;
}

.panel-projects .fx-orbs {
    background:
        radial-gradient(circle at 18% 22%, var(--fx-purple), transparent 28%),
        radial-gradient(circle at 84% 68%, var(--fx-magenta), transparent 30%),
        conic-gradient(from 180deg at 70% 30%, transparent, var(--fx-purple), transparent 40%);
}

.panel-projects .fx-beam {
    inset: auto 6% 8% auto;
    width: min(340px, 48vw);
    height: min(340px, 48vw);
    border-radius: 50%;
    border: 1px solid var(--fx-purple);
    box-shadow: 0 0 60px var(--fx-purple), inset 0 0 50px var(--fx-magenta);
    opacity: 0.7;
    animation: prism-spin 14s linear infinite;
}

.panel-projects .fx-geo {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='72' height='84' viewBox='0 0 72 84'><polygon points='36,2 70,21 70,63 36,82 2,63 2,21' fill='none' stroke='%23b794f6' stroke-opacity='0.35' stroke-width='1'/></svg>");
    background-size: 72px 84px;
    animation: hex-shift 16s linear infinite;
    opacity: 0.4;
    mask-image: radial-gradient(circle at 80% 20%, #000 0 35%, transparent 75%);
}

/* Education: blueprint / schematic */
.panel-education {
    background: color-mix(in srgb, var(--panel-education-bg) 58%, transparent);
}

.panel-education .panel-fx {
    background:
        linear-gradient(90deg, var(--fx-cyan-line) 1px, transparent 1px) 0 0 / 80px 80px,
        linear-gradient(var(--fx-cyan-line) 1px, transparent 1px) 0 0 / 80px 80px;
}

.panel-education .panel-fx::after {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0 47px,
        var(--fx-cyan-soft) 47px 48px
    );
    opacity: 0.35;
}

.panel-education .fx-orbs {
    background:
        radial-gradient(circle at 76% 24%, var(--fx-cyan), transparent 30%),
        radial-gradient(circle at 18% 80%, var(--fx-purple), transparent 32%);
}

.panel-education .fx-beam {
    inset: 18% 12%;
    border: 1px solid var(--fx-cyan-line);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
    clip-path: polygon(0 10%, 10% 0, 100% 0, 100% 90%, 90% 100%, 0 100%);
    animation: frame-glow 7s ease-in-out infinite;
}

.panel-education .fx-beam::before,
.panel-education .fx-beam::after {
    content: "";
    position: absolute;
    background: var(--accent);
    opacity: 0.45;
    box-shadow: 0 0 10px var(--accent);
}

.panel-education .fx-beam::before {
    left: 8%;
    right: 8%;
    height: 1px;
    top: 50%;
    animation: reticle-x 10s ease-in-out infinite;
}

.panel-education .fx-beam::after {
    top: 8%;
    bottom: 8%;
    width: 1px;
    left: 50%;
    animation: reticle-y 10s ease-in-out infinite;
}

.panel-education .fx-geo {
    inset: auto;
    right: 6%;
    top: 18%;
    width: min(280px, 50vw);
    height: min(280px, 50vw);
    border: 1px solid var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 40px color-mix(in srgb, var(--accent) 35%, transparent), inset 0 0 40px var(--fx-cyan-soft);
    animation: pulse-ring 5s ease-out infinite;
    opacity: 0.55;
}

.panel-education .fx-geo::before,
.panel-education .fx-geo::after {
    content: "";
    position: absolute;
    inset: 18%;
    border: 1px dashed var(--fx-cyan-line);
    border-radius: 50%;
    animation: prism-spin 22s linear infinite;
}

.panel-education .fx-geo::after {
    inset: 36%;
    animation-direction: reverse;
    animation-duration: 14s;
}

/* Certificates: credential / amber */
.panel-certificates {
    background: color-mix(in srgb, var(--panel-certificates-bg) 58%, transparent);
}

.panel-certificates .panel-fx {
    background:
        radial-gradient(circle at 18% 20%, var(--fx-amber), transparent 30%),
        radial-gradient(circle at 88% 80%, var(--fx-cyan-soft), transparent 28%);
}

.panel-certificates .panel-fx::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--fx-amber-dot) 1px, transparent 1.5px);
    background-size: 32px 32px;
    opacity: 0.4;
    animation: node-pulse 8s ease-in-out infinite;
}

.panel-certificates .fx-orbs {
    background:
        radial-gradient(circle at 24% 30%, var(--fx-amber), transparent 28%),
        radial-gradient(circle at 78% 72%, var(--fx-cyan), transparent 32%);
}

.panel-certificates .fx-beam {
    inset: auto 8% 12% 52%;
    height: min(280px, 55vw);
    border-radius: 50%;
    background: conic-gradient(from 90deg, transparent, var(--fx-amber), #fff8, transparent 42%);
    opacity: 0.7;
    animation: prism-spin 10s linear infinite reverse;
    filter: blur(2px);
}

.panel-certificates .fx-geo {
    background:
        radial-gradient(circle at 20% 30%, #fff 0 1px, transparent 1.6px),
        radial-gradient(circle at 70% 20%, var(--fx-amber) 0 1.4px, transparent 2px),
        radial-gradient(circle at 40% 75%, #fff 0 1px, transparent 1.6px),
        radial-gradient(circle at 82% 68%, var(--fx-amber) 0 1.5px, transparent 2.2px);
    animation: twinkle 2.4s ease-in-out infinite;
    opacity: 0.8;
}

/* Contact: radar / signal */
.panel-contact {
    background: color-mix(in srgb, var(--panel-contact-bg) 58%, transparent);
}

.panel-contact .panel-fx {
    background:
        radial-gradient(circle at 70% 40%, var(--fx-cyan-soft), transparent 28%),
        radial-gradient(circle at 20% 80%, var(--fx-teal), transparent 26%);
}

.panel-contact .panel-fx::before,
.panel-contact .panel-fx::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 72%;
    width: min(520px, 90vw);
    height: min(520px, 90vw);
    translate: -50% -50%;
    border: 1px solid var(--fx-cyan-line);
    border-radius: 50%;
}

.panel-contact .panel-fx::after {
    width: min(320px, 60vw);
    height: min(320px, 60vw);
    animation: pulse-ring 4.5s ease-out infinite;
}

.panel-contact .fx-orbs {
    inset: auto;
    top: 50%;
    left: 72%;
    width: min(560px, 95vw);
    height: min(560px, 95vw);
    translate: -50% -50%;
    border-radius: 50%;
    filter: none;
    background: conic-gradient(from 0deg, transparent 0 68%, var(--fx-cyan) 82%, var(--accent) 88%, #fff 92%, transparent 97%);
    mask-image: radial-gradient(circle, transparent 16%, #000 17%, #000 70%, transparent 72%);
    animation: radar-spin 4.8s linear infinite;
    opacity: 0.8;
}

.panel-contact .fx-beam {
    inset: auto;
    top: 50%;
    left: 72%;
    width: min(220px, 40vw);
    height: min(220px, 40vw);
    translate: -50% -50%;
    border-radius: 50%;
    border: 1px dashed var(--fx-cyan-line);
    animation: pulse-ring 6s ease-out infinite 1.4s;
}

.panel-contact .fx-particles {
    mask-image: radial-gradient(circle at 72% 50%, #000 0 40%, transparent 70%);
}

.panel-contact .fx-geo {
    inset: auto;
    top: 42%;
    left: 68%;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow:
        0 0 16px var(--accent),
        70px -40px 0 0 color-mix(in srgb, var(--accent) 80%, transparent),
        -90px 55px 0 0 color-mix(in srgb, var(--accent-strong) 80%, transparent);
    animation: twinkle 1.6s ease-in-out infinite;
    opacity: 0.9;
}

.wrap {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(2.4rem, 7vw, 5.75rem) var(--space);
    min-width: 0;
}

@keyframes grid-drift {
    from { background-position: 0 0, 0 0; }
    to { background-position: 48px 48px, 48px 48px; }
}

@keyframes scan {
    0%, 100% { top: -10%; }
    50% { top: 80%; }
}

@keyframes pulse-ring {
    0% { opacity: 0.55; transform: scale(0.72); }
    100% { opacity: 0; transform: scale(1.15); }
}

@keyframes orb-drift {
    0% { transform: translate(var(--fx-px), var(--fx-py)) scale(1); }
    100% { transform: translate(calc(var(--fx-px) + 3%), calc(var(--fx-py) - 4%)) scale(1.08); }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 1; }
}

@keyframes meteor {
    0% { transform: translate(8vw, -10%) rotate(-18deg); opacity: 0; }
    8% { opacity: 0.85; }
    22% { transform: translate(-42vw, 70%) rotate(-18deg); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes grid-rush {
    from { background-position: 0 0, 0 0; }
    to { background-position: 0 56px, 56px 0; }
}

@keyframes circuit-flow {
    from { background-position: 12% 0, 0 28%, 70% 0; }
    to { background-position: 12% 80%, 40% 28%, 70% 100%; }
}

@keyframes rain-fall {
    from { background-position: 0 0; }
    to { background-position: 0 160px; }
}

@keyframes hex-shift {
    from { background-position: 0 0; }
    to { background-position: 72px 84px; }
}

@keyframes node-pulse {
    0%, 100% { opacity: 0.32; }
    50% { opacity: 0.6; }
}

@keyframes frame-glow {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.8; }
}

@keyframes beam-sweep {
    from { background-position: 0 0; }
    to { background-position: 220% 0; }
}

@keyframes vscan {
    0%, 100% { left: -10%; }
    50% { left: 75%; }
}

@keyframes prism-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes reticle-x {
    0%, 100% { top: 28%; }
    50% { top: 68%; }
}

@keyframes reticle-y {
    0%, 100% { left: 32%; }
    50% { left: 70%; }
}

@keyframes radar-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.eyebrow,
.status-line,
.logo,
.lang-opt,
.btn,
.chip-list li,
.contact-label,
.project-kicker,
.project-thumb,
.text-link,
.nav-current-kicker {
    white-space: nowrap;
}

.section-heading h2,
.project-card h3,
.timeline h4,
.dialog-inner h2 {
    text-wrap: balance;
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: none;
}

.eyebrow,
.status-line {
    font-family: var(--mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: clamp(0.68rem, 2vw, 0.78rem);
    color: var(--accent);
    margin: 0 0 0.7rem;
}

.status-line {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 0.5rem;
    color: var(--accent-strong);
    letter-spacing: 0.08em;
}

.pulse {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: var(--accent-strong);
    box-shadow: 0 0 12px var(--accent-strong);
    animation: live 1.6s ease-in-out infinite;
}

@keyframes live {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

.section-heading h2,
.hero-copy h1 {
    font-weight: 500;
    letter-spacing: -0.012em;
    line-height: 1.22;
    margin: 0 0 1rem;
}

.hero-copy h1 {
    font-size: clamp(2.1rem, 8vw, 4.4rem);
    overflow-wrap: break-word;
    word-break: normal;
    text-wrap: balance;
}

.tagline {
    font-size: clamp(1.05rem, 2.4vw, 1.4rem);
    max-width: 40rem;
    margin: 0 0 1rem;
}

.value-prop,
.section-lede,
.about-copy p,
.timeline p { color: var(--text-muted); }

.section-heading .btn { margin-top: 0.75rem; }

.hero-grid,
.about-grid {
    display: grid;
    gap: clamp(1.4rem, 4vw, 2.5rem);
}

.hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(200px, 0.7fr);
    align-items: center;
}

.hero-ctas,
.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0.65rem 1.1rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
    font-family: var(--mono);
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-ink);
    box-shadow: 0 0 24px color-mix(in srgb, var(--accent) 35%, transparent);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}

.btn-ghost {
    background: var(--bg-muted);
    color: var(--text);
}

.portrait-frame {
    margin: 0 auto;
    position: relative;
    max-width: min(360px, 100%);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow), 0 0 40px var(--fx-cyan-soft);
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--portrait-bg);
}

.portrait-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.92) contrast(1.05);
}

.hud-corner {
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid var(--accent);
    z-index: 1;
}
.hud-tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.hud-tr { top: 8px; right: 8px; border-left: 0; border-bottom: 0; }
.hud-bl { bottom: 8px; left: 8px; border-right: 0; border-top: 0; }
.hud-br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.about-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
}

.competency-panel,
.resume-block,
.project-card,
.contact-card,
.contact-form {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    backdrop-filter: blur(10px);
    min-width: 0;
}

.competency-panel h3,
.resume-block h3 {
    margin: 0 0 1rem;
    font-family: var(--mono);
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.competency-group h4 {
    margin: 0.9rem 0 0.45rem;
    font-size: 0.72rem;
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.chip-list li {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 0.22rem 0.6rem;
    font-size: 0.8rem;
    font-family: var(--mono);
    white-space: nowrap;
}

.chip-list.compact li { font-size: 0.72rem; }

.project-grid {
    display: grid;
    gap: 1.1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel-education .resume-block,
.panel-experience .resume-block,
.panel-certificates .resume-block {
    max-width: 100%;
}

.project-thumb {
    min-height: clamp(110px, 22vw, 150px);
    display: grid;
    place-items: center;
    background:
        linear-gradient(135deg, var(--fx-cyan-soft), var(--fx-purple)),
        repeating-linear-gradient(90deg, var(--fx-cyan-line) 0 1px, transparent 1px 16px);
    color: var(--accent);
    font-size: 0.75rem;
    font-family: var(--mono);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.project-body { padding: 1.1rem 1.15rem 1.25rem; }
.project-card {
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover,
.project-card:focus-visible,
.project-card.is-previewing {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 18px 40px color-mix(in srgb, var(--accent) 22%, transparent);
    outline: none;
}

.project-kicker {
    margin: 0 0 0.4rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-family: var(--mono);
}

.project-card h3,
.timeline h4 { margin: 0 0 0.5rem; }
.project-summary { margin: 0 0 0.9rem; color: var(--text-muted); }

.text-link {
    background: none;
    border: 0;
    padding: 0.25rem 0;
    min-height: 2.5rem;
    display: inline-flex;
    align-items: center;
    color: var(--accent);
    font: inherit;
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}

.text-link:hover { text-decoration: underline; }

.timeline {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1.1rem;
}

.timeline .meta {
    margin: 0 0 0.35rem;
    color: var(--accent);
    font-size: 0.85rem;
    font-family: var(--mono);
}

.link-list .meta {
    display: inline-block;
    margin-top: 0.2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--mono);
}

.contact-wrap {
    padding-top: clamp(2rem, 5vw, 3.25rem);
    padding-bottom: clamp(2rem, 5vw, 3.25rem);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(1.25rem, 3vw, 2rem);
    align-items: start;
}

.contact-left .section-heading {
    margin-bottom: 1rem;
}

.contact-left .section-heading h2 {
    margin-bottom: 0.55rem;
    font-size: clamp(1.45rem, 3.2vw, 2.1rem);
}

.contact-left .section-lede {
    margin: 0;
}

.contact-channels {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.65rem;
}

.contact-card {
    display: grid;
    text-decoration: none;
    color: var(--text);
    overflow-wrap: break-word;
    word-break: normal;
    padding: 0.8rem 1rem;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.contact-card:hover,
.contact-card:focus-visible {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.contact-label {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    font-family: var(--mono);
}

.contact-form {
    display: grid;
    gap: 0.7rem;
    padding: 1.1rem 1.15rem;
}

.field { display: grid; gap: 0.35rem; }

.field input,
.field textarea {
    width: 100%;
    max-width: 100%;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 70%, transparent);
    color: var(--text);
    border-radius: var(--radius);
    padding: 0.7rem 0.8rem;
    font: inherit;
    font-family: var(--mono);
}

.form-note {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.contact-form .btn:disabled {
    opacity: 0.65;
    cursor: wait;
}

.form-status {
    margin: 0;
    font-size: 0.85rem;
    color: var(--accent-strong);
}

.form-status.is-error { color: #e85d5d; }

.field input:user-invalid,
.field textarea:user-invalid {
    border-color: #e85d5d;
}

.site-footer {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    border-top: 1px solid var(--border);
    padding: 1.5rem var(--space) 2.5rem;
    text-align: center;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.82rem;
    background: var(--footer-bg);
}

.site-footer .panel-fx {
    background:
        repeating-linear-gradient(90deg, var(--fx-cyan-soft) 0 8px, transparent 8px 18px);
    opacity: 0.18;
    height: 4px;
    inset: auto 0 0 0;
}

.site-footer p { position: relative; z-index: 1; margin: 0; }

.project-dialog {
    width: min(720px, calc(100vw - 1.5rem));
    max-height: min(88vh, 860px);
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    background: var(--dialog-bg);
    color: var(--text);
    box-shadow: var(--shadow);
}

.project-dialog::backdrop { background: var(--dialog-backdrop); }

.dialog-inner {
    position: relative;
    padding: 1.5rem 1.25rem 1.6rem;
}

.dialog-close {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    font-size: 1.4rem;
}

.dialog-body h3 {
    margin: 1.2rem 0 0.4rem;
    font-size: 0.78rem;
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

.dialog-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-top: 1.2rem;
}

/* ---------- Per-section tech skins ---------- */
.panel-about .eyebrow { color: var(--accent-strong); }
.panel-experience .eyebrow { color: var(--accent-strong); }
.panel-projects .eyebrow { color: var(--accent-2); }
.panel-education .eyebrow { color: var(--accent); }
.panel-certificates .eyebrow { color: #e6c56e; }
.panel-contact .eyebrow { color: var(--accent); }

html[data-theme="light"] .panel-certificates .eyebrow { color: #9a7418; }

.panel-about .eyebrow::before { content: "// "; }
.panel-experience .eyebrow::before { content: "$ "; }
.panel-projects .eyebrow::before { content: "01 / "; }
.panel-education .eyebrow::before { content: "[ "; }
.panel-education .eyebrow::after { content: " ]"; }
.panel-certificates .eyebrow::before { content: "ID "; }
.panel-contact .eyebrow::before { content: ">> "; }

.panel-about .section-heading h2 {
    padding-left: 0.9rem;
    border-left: 3px solid var(--accent-strong);
}

.panel-experience .section-heading h2 {
    font-family: var(--mono);
    letter-spacing: 0;
    font-weight: 500;
}

.panel-experience .section-heading h2::before {
    content: "> ";
    color: var(--accent-strong);
}

.panel-projects .section-heading h2 {
    padding-bottom: 0.55rem;
    border-bottom: 1px solid color-mix(in srgb, var(--accent-2) 45%, transparent);
}

.panel-about .competency-panel {
    clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
    border-color: color-mix(in srgb, var(--accent-strong) 42%, var(--border));
    box-shadow: 8px 8px 0 color-mix(in srgb, var(--accent-strong) 12%, transparent);
}

.panel-about .chip-list li {
    border-radius: 0;
    border-color: color-mix(in srgb, var(--accent-strong) 28%, var(--border));
}

.panel-experience .resume-block {
    background: color-mix(in srgb, var(--accent-strong) 7%, var(--bg-elevated));
    border-color: color-mix(in srgb, var(--accent-strong) 38%, var(--border));
    box-shadow: inset 3px 0 0 var(--accent-strong);
    border-radius: 0;
}

.panel-experience .timeline {
    border-left: 1px solid color-mix(in srgb, var(--accent-strong) 45%, transparent);
    padding-left: 1.15rem;
    gap: 1.35rem;
}

.panel-experience .timeline li {
    position: relative;
}

.panel-experience .timeline li::before {
    content: "";
    position: absolute;
    left: -1.42rem;
    top: 0.35rem;
    width: 9px;
    height: 9px;
    border-radius: 1px;
    background: var(--accent-strong);
    box-shadow: 0 0 10px var(--accent-strong);
}

.panel-experience .timeline h4,
.panel-experience .timeline .meta {
    font-family: var(--mono);
}

.panel-projects .project-card {
    border-radius: 0;
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
    border-color: color-mix(in srgb, var(--accent-2) 40%, var(--border));
}

.panel-projects .project-card:hover,
.panel-projects .project-card:focus-visible,
.panel-projects .project-card.is-previewing {
    border-color: var(--accent-2);
    box-shadow: 0 16px 36px color-mix(in srgb, var(--accent-2) 22%, transparent);
}

.panel-projects .project-thumb {
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent-2) 28%, transparent), var(--fx-magenta)),
        repeating-linear-gradient(135deg, var(--fx-purple) 0 1px, transparent 1px 14px);
    color: var(--accent-2);
}

.panel-projects .text-link { color: var(--accent-2); }

.panel-education .resume-block {
    background:
        repeating-linear-gradient(
            0deg,
            transparent 0 23px,
            color-mix(in srgb, var(--accent) 7%, transparent) 23px 24px
        ),
        var(--bg-elevated);
    border: 1px dashed color-mix(in srgb, var(--accent) 55%, var(--border));
    border-radius: 0;
}

.panel-education .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
}

.panel-education .timeline li {
    padding: 0.9rem 1rem;
    border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
    background: color-mix(in srgb, var(--bg) 35%, transparent);
}

.panel-certificates .resume-block {
    background: color-mix(in srgb, #e6c56e 8%, var(--bg-elevated));
    border-color: color-mix(in srgb, #e6c56e 40%, var(--border));
    border-radius: 18px;
}

.panel-certificates .link-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.panel-certificates .link-list li {
    text-align: left;
    padding: 0;
    border: 0;
    border-radius: 14px;
    background: none;
}

.panel-certificates .link-list a {
    color: #e6c56e;
    font-weight: 500;
}

html[data-theme="light"] .panel-certificates .link-list a { color: #8a6410; }

.panel-contact .contact-card {
    border-radius: 0;
    border-left: 3px solid var(--accent);
}

.panel-contact .contact-form {
    border-radius: 0;
    border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.panel-contact .contact-form::before {
    content: "";
    display: block;
    height: 12px;
    width: 46px;
    margin-bottom: 0.35rem;
    background:
        radial-gradient(circle at 6px 6px, #ff5f56 4px, transparent 4.5px),
        radial-gradient(circle at 22px 6px, #ffbd2e 4px, transparent 4.5px),
        radial-gradient(circle at 38px 6px, #27c93f 4px, transparent 4.5px);
}

/* ---------- RWD ---------- */
@media (max-width: 1023px) {
    .menu-toggle { display: grid; }

    .site-nav {
        width: min(18rem, calc(100vw - 2rem));
        padding-bottom: max(1.6rem, env(safe-area-inset-bottom));
        transform: translateX(-105%);
        transition: transform 0.28s ease;
        box-shadow: var(--shadow);
        background: color-mix(in srgb, var(--bg) 92%, transparent);
    }

    .site-nav.is-open {
        transform: translateX(0);
    }

    body.nav-open { overflow: hidden; }

    .nav-backdrop:not([hidden]) {
        display: block;
        position: fixed;
        inset: var(--header-h) 0 0 0;
        z-index: 27;
        background: var(--dialog-backdrop);
    }
}

@media (max-width: 1200px) {
    .project-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .project-grid .project-card:last-child {
        grid-column: 1 / -1;
        width: 100%;
        max-width: calc((100% - 1.1rem) / 2);
        justify-self: center;
    }
}

@media (max-width: 900px) {
    .hero-grid,
    .about-grid,
    .project-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .project-grid .project-card:last-child {
        max-width: none;
    }

    .panel-education .timeline,
    .panel-certificates .link-list {
        grid-template-columns: 1fr;
    }

    .hero-media { order: -1; }
    .portrait-frame { max-width: min(240px, 70vw); }

    .panel-contact .panel-fx::before,
    .panel-contact .panel-fx::after,
    .panel-contact .fx-orbs,
    .panel-contact .fx-beam,
    .panel-contact .fx-geo {
        left: 50%;
        top: 22%;
    }

    .wrap {
        padding-top: clamp(2rem, 6vw, 3.5rem);
        padding-bottom: clamp(2rem, 6vw, 3.5rem);
    }
}

@media (max-width: 640px) {
    :root { --header-h: 60px; }

    .header-inner { gap: 0.4rem; }
    .icon-btn { width: 2.3rem; height: 2.3rem; }
    .lang-opt { min-width: 2.2rem; min-height: 2.3rem; padding: 0 0.4rem; font-size: 0.72rem; }

    .hero-ctas .btn,
    .dialog-links .btn,
    .section-heading .btn {
        width: 100%;
        justify-content: center;
    }

    .chip-list li { font-size: 0.74rem; }

    .fx-orbs { filter: blur(22px); opacity: 0.75; }
    .fx-geo { opacity: 0.35; }
    .panel-hero .fx-geo { top: 48%; }
    .panel-hero .panel-fx::after { display: none; }
    .panel-projects .fx-beam,
    .panel-certificates .fx-beam { opacity: 0.28; }

    .project-actions { flex-direction: column; align-items: flex-start; }

    .competency-panel,
    .resume-block,
    .contact-card,
    .contact-form {
        padding: 1rem;
    }

    .contact-card { font-size: 0.92rem; }

    .project-dialog {
        width: calc(100vw - 1rem);
        max-height: min(92vh, 860px);
    }
}

@media (max-width: 400px) {
    .logo { letter-spacing: 0.08em; }
    .hero-copy h1 { font-size: 1.85rem; }
    .nav-list a { font-size: 0.84rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    .panel-fx,
    .panel-fx::before,
    .panel-fx::after,
    .fx-orbs,
    .fx-particles,
    .fx-particles::after,
    .fx-beam,
    .fx-beam::before,
    .fx-beam::after,
    .fx-geo,
    .fx-geo::before,
    .fx-geo::after,
    .pulse,
    .project-card,
    .contact-card,
    .site-nav,
    .nav-list::after,
    .nav-list a,
    .nav-list a::before {
        animation: none !important;
        transition: none !important;
        filter: none;
    }

    .carousel-slide,
    .project-thumb img {
        transition: none !important;
        animation: none !important;
    }

    .project-card.is-previewing .project-thumb img.is-active {
        transform: none;
    }

    .fx-orbs {
        transform: none;
        inset: 0;
        opacity: 0.35;
    }

    .fx-canvas { display: none; }
}

.panel::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(ellipse 75% 50% at 100% 0%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 62%);
}

.panel-about::before { background: radial-gradient(ellipse 70% 50% at 0% 100%, color-mix(in srgb, var(--accent-strong) 9%, transparent), transparent 62%); }
.panel-experience::before { background: radial-gradient(ellipse 70% 50% at 100% 80%, color-mix(in srgb, var(--accent-strong) 8%, transparent), transparent 62%); }
.panel-projects::before,
.panel-project-page::before { background: radial-gradient(ellipse 70% 50% at 0% 0%, color-mix(in srgb, var(--accent-2) 10%, transparent), transparent 62%); }
.panel-education::before { background: radial-gradient(ellipse 70% 50% at 100% 0%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 62%); }
.panel-certificates::before { background: radial-gradient(ellipse 70% 50% at 0% 100%, color-mix(in srgb, var(--focus) 10%, transparent), transparent 62%); }
.panel-contact::before { background: radial-gradient(ellipse 70% 50% at 90% 50%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 62%); }

body.is-project-view main > .panel:not(#project-page) { display: none; }

.project-page-wrap { max-width: var(--max); }

.project-page-nav {
    position: sticky;
    top: calc(var(--header-h) + 0.55rem);
    z-index: 4;
    margin: 0 0 1.4rem;
    padding: 0.2rem 0 0.55rem;
    background: color-mix(in srgb, var(--panel-projects-bg) 88%, transparent);
    backdrop-filter: blur(10px);
}

.back-link {
    gap: 0.45rem;
    min-height: 2.9rem;
    padding: 0.65rem 1.15rem 0.65rem 0.9rem;
    border-width: 2px;
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 12%, var(--bg-elevated));
    box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 16%, transparent);
}

.back-link::before {
    content: "←";
    display: grid;
    place-items: center;
    width: 1.55rem;
    height: 1.55rem;
    border: 1px solid color-mix(in srgb, var(--accent) 55%, var(--border));
    background: color-mix(in srgb, var(--accent) 18%, transparent);
    font-size: 1.05rem;
    line-height: 1;
}

.back-link:hover,
.back-link:focus-visible {
    background: var(--accent);
    color: var(--accent-ink);
    text-decoration: none;
}

.back-link:hover::before,
.back-link:focus-visible::before {
    border-color: var(--accent-ink);
    background: color-mix(in srgb, var(--accent-ink) 12%, transparent);
}

.project-page-header h1 {
    font-size: clamp(1.7rem, 4.5vw, 2.6rem);
    margin: 0 0 1.25rem;
    text-wrap: balance;
}

.project-media {
    margin: 0 0 1.6rem;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    overflow: hidden;
}

.hero-placeholder {
    min-height: 12rem;
    display: grid;
    place-items: center;
    color: var(--text-muted);
    font-family: var(--mono);
    font-size: 0.92rem;
    background: var(--portrait-bg);
}

.hero-video video,
.hero-image img,
.carousel-slide img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 26rem;
    object-fit: contain;
    background: #000;
}

.video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
}

.video-wrapper iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.hero-caption,
.hero-image-caption {
    margin: 0;
    padding: 0.75rem 1rem;
    color: var(--text);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    font-size: 0.9rem;
}

.hero-image { position: relative; }

.hero-image .hero-image-caption,
.carousel-slide .hero-image-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.78));
    color: #f4fbff;
}

html[data-theme="light"] .hero-image .hero-image-caption,
html[data-theme="light"] .carousel-slide .hero-image-caption {
    background: linear-gradient(transparent, rgba(18, 32, 48, 0.72));
}

.media-carousel {
    position: relative;
    overflow: hidden;
    background: var(--bg-elevated);
}

.carousel-viewport {
    position: relative;
}

.carousel-slide {
    display: none;
    width: 100%;
    padding: 0;
    border: 0;
    background: none;
    cursor: zoom-in;
}

button.carousel-slide:not(.is-active),
button.carousel-slide[hidden] {
    display: none !important;
}

button.carousel-slide.is-active {
    display: block;
    position: relative;
    z-index: 1;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    max-height: 32rem;
    object-fit: contain;
    background: var(--bg-elevated);
}

.carousel-nav {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: 2.15rem;
    height: 2.15rem;
    padding: 0;
    border: 1px solid color-mix(in srgb, #fff 38%, transparent);
    border-radius: 50%;
    background: color-mix(in srgb, #000 42%, transparent);
    color: #fff;
    cursor: pointer;
    transform: translateY(-50%);
}

.carousel-nav.prev { left: 0.7rem; }
.carousel-nav.next { right: 0.7rem; }

.carousel-nav::before {
    content: "";
    display: block;
    width: 0.42rem;
    height: 0.42rem;
    margin: 0 auto;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
}

.carousel-nav.prev::before { transform: translateX(0.12rem) rotate(45deg); }
.carousel-nav.next::before { transform: translateX(-0.12rem) rotate(-135deg); }

.carousel-dots {
    position: absolute;
    left: 0;
    right: 0;
    top: 0.7rem;
    bottom: auto;
    z-index: 2;
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    pointer-events: none;
}

.carousel-dot {
    pointer-events: auto;
    width: 0.5rem;
    height: 0.5rem;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: color-mix(in srgb, #fff 42%, transparent);
    cursor: pointer;
}

.carousel-dot.is-active { background: #fff; }

.additional-images {
    display: flex;
    gap: 0.65rem;
    padding: 0.8rem 1rem;
    overflow-x: auto;
    background: color-mix(in srgb, var(--bg) 55%, transparent);
}

.image-thumbnail {
    flex: 0 0 auto;
    width: 7.5rem;
    height: 5rem;
    padding: 0;
    border: 1px solid var(--border);
    background: none;
    overflow: hidden;
    cursor: zoom-in;
}

.image-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(16rem, 0.75fr);
    gap: 1.15rem;
    align-items: start;
}

.detail-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 1.1rem 1.15rem;
    margin-bottom: 1rem;
}

.project-page-body h3,
.project-page-links h3 {
    margin: 0 0 0.55rem;
    font-size: 0.78rem;
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

html[data-lang="zh"] .project-page-body h3,
html[data-lang="zh"] .project-page-links h3 {
    text-transform: none;
    letter-spacing: 0.04em;
}

.project-page-body p {
    margin: 0 0 0.75rem;
    color: var(--text-muted);
}

.project-page-body p:last-child { margin-bottom: 0; }

.detail-list {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--text-muted);
}

.timeline-summary { display: grid; gap: 0.45rem; }

.timeline-item {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    font-family: var(--mono);
    font-size: 0.85rem;
}

.timeline-item span:first-child { color: var(--text-muted); }
.timeline-item span:last-child { color: var(--text); text-align: right; }

.project-page-links {
    margin-top: 0.4rem;
}

.project-page-links .link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.media-open {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    background: none;
    cursor: zoom-in;
}

button.carousel-slide.media-open:not(.is-active),
button.carousel-slide.media-open[hidden] {
    display: none !important;
}

.media-dialog {
    position: relative;
    width: min(960px, calc(100vw - 1.25rem));
    max-height: min(92vh, 900px);
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    background: var(--dialog-bg);
    color: var(--text);
    box-shadow: var(--shadow);
}

.media-dialog::backdrop { background: var(--dialog-backdrop); }

.media-dialog img {
    display: block;
    width: 100%;
    height: auto;
}

.dialog-close {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    font-size: 1.4rem;
    z-index: 2;
}

.project-thumb {
    position: relative;
    overflow: hidden;
}

.project-thumb.has-cover {
    height: clamp(140px, 26vw, 180px);
}

.project-thumb.has-cover > span { display: none; }

.project-thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1);
    transition: opacity 0.35s ease, transform 0.7s ease;
}

.project-thumb img.is-active {
    opacity: 1;
}

.hover-preview {
    position: fixed;
    z-index: 80;
    width: min(22rem, calc(100vw - 1.5rem));
    pointer-events: none;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
    box-shadow: 0 22px 48px color-mix(in srgb, #000 46%, transparent);
}

.hover-preview-chrome {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.65rem;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    border-bottom: 1px solid var(--border);
}

.hover-preview-dots {
    flex: 0 0 2.1rem;
    width: 2.1rem;
    height: 0.42rem;
    border-radius: 99px;
    background:
        radial-gradient(circle at 0.2rem 50%, #ff5f57 0.18rem, transparent 0.2rem),
        radial-gradient(circle at 0.95rem 50%, #febc2e 0.18rem, transparent 0.2rem),
        radial-gradient(circle at 1.7rem 50%, #28c840 0.18rem, transparent 0.2rem);
}

.hover-preview-url {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-muted);
}

.hover-preview-stage {
    position: relative;
    height: 13.75rem;
    overflow: hidden;
    background: var(--bg);
}

.hover-preview iframe {
    width: 1280px;
    height: 800px;
    border: 0;
    transform: scale(0.275);
    transform-origin: top left;
    pointer-events: none;
    background: var(--bg);
}

.hover-preview.is-file .hover-preview-stage {
    height: 17rem;
    background: #f4f1ea;
}

.hover-preview.is-file iframe {
    width: 1584px;
    height: 1224px;
    transform: scale(0.222);
    transform-origin: top left;
    background: #f4f1ea;
}

.cert-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, #e6c56e 35%, var(--border));
    border-radius: 14px;
    background: color-mix(in srgb, var(--bg) 30%, transparent);
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.cert-card:hover,
.cert-card:focus-visible,
.cert-card.is-previewing {
    transform: translateY(-6px);
    border-color: #e6c56e;
    box-shadow: 0 16px 34px color-mix(in srgb, #e6c56e 22%, transparent);
    outline: none;
}

.cert-copy {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1.05rem 1rem 1.15rem;
}

.cert-title {
    color: inherit;
    font-weight: 500;
}

.cert-open {
    margin-top: 0.2rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #e6c56e;
}

html[data-lang="zh"] .cert-open {
    text-transform: none;
    letter-spacing: 0.04em;
}

html[data-theme="light"] .cert-open { color: #8a6410; }

html.is-preview-embed .site-header,
html.is-preview-embed .site-nav,
html.is-preview-embed .nav-backdrop,
html.is-preview-embed .site-footer,
html.is-preview-embed .skip-link,
html.is-preview-embed .hover-preview,
html.is-preview-embed .project-page-nav,
html.is-preview-embed .panel-fx,
html.is-preview-embed #media-dialog {
    display: none !important;
}

html.is-preview-embed {
    --header-h: 0px;
}

html.is-preview-embed main > .panel:not(#project-page) {
    display: none !important;
}

html.is-preview-embed #project-page {
    display: block !important;
}

html.is-preview-embed .wrap {
    padding-top: 1rem;
    padding-bottom: 1.5rem;
}

.cert-preview {
    display: block;
    height: 8.5rem;
    overflow: hidden;
    background: #f4f1ea;
    border-bottom: 1px solid var(--border);
}

.cert-preview img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center top;
}

.hover-preview[hidden] {
    display: none !important;
}

@media (max-width: 900px) {
    .project-detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .project-page-links .btn,
    .project-page-links .link-row .btn {
        width: 100%;
        justify-content: center;
    }

    .media-dialog {
        width: calc(100vw - 1rem);
        max-height: min(92vh, 860px);
    }
}