:root {
    --bg: #07090d;
    --bg-elevated: #0c1016;
    --surface: #11161e;
    --surface-2: #151b24;
    --surface-soft: rgba(255, 255, 255, 0.035);
    --text: #f5f7fb;
    --text-soft: #c8ced8;
    --muted: #8f99a8;
    --line: rgba(255, 255, 255, 0.09);
    --line-strong: rgba(255, 255, 255, 0.16);
    --accent: #e50914;
    --accent-2: #ff7a18;
    --accent-soft: rgba(229, 9, 20, 0.13);
    --green: #38d996;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --container: 1180px;
    --header-h: 76px;
}

[data-theme="light"] {
    --bg: #f6f7f9;
    --bg-elevated: #ffffff;
    --surface: #ffffff;
    --surface-2: #f0f2f5;
    --surface-soft: rgba(9, 13, 20, 0.035);
    --text: #10131a;
    --text-soft: #343a46;
    --muted: #677180;
    --line: rgba(9, 13, 20, 0.1);
    --line-strong: rgba(9, 13, 20, 0.18);
    --accent-soft: rgba(229, 9, 20, 0.08);
    --shadow: 0 24px 70px rgba(31, 41, 55, 0.12);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at 18% 5%, rgba(229, 9, 20, 0.09), transparent 28rem),
        radial-gradient(circle at 86% 20%, rgba(255, 122, 24, 0.07), transparent 26rem),
        var(--bg);
    color: var(--text);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    opacity: 0.32;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(to bottom, black, transparent 72%);
}

a {
    color: inherit;
    text-decoration: none;
}

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

button,
a,
input,
textarea {
    font: inherit;
}

button {
    color: inherit;
}

::selection {
    background: rgba(229, 9, 20, 0.28);
    color: var(--text);
}

:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 4px;
}

.container {
    width: min(calc(100% - 40px), var(--container));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 9999;
    padding: 10px 14px;
    background: var(--text);
    color: var(--bg);
    border-radius: 10px;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 16px;
}

.mono {
    font-family: "JetBrains Mono", monospace;
}

.muted {
    color: var(--muted);
}

.accent {
    background: linear-gradient(100deg, #ff2a34, #ff7a18);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-h);
    border-bottom: 1px solid transparent;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.scrolled {
    border-bottom-color: var(--line);
}

.nav-shell {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    min-width: max-content;
    font-weight: 750;
    letter-spacing: -0.03em;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid rgba(229, 9, 20, 0.35);
    border-radius: 12px;
    color: #fff;
    background: linear-gradient(145deg, #ee1721, #8b0710);
    box-shadow: 0 8px 28px rgba(229, 9, 20, 0.18);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.82rem;
}

.brand-text {
    font-size: 0.95rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    position: relative;
    padding: 9px 11px;
    border-radius: 9px;
    color: var(--muted);
    font-size: 0.83rem;
    font-weight: 600;
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
    background: var(--surface-soft);
}

.nav-links a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 3px;
    width: 14px;
    height: 2px;
    border-radius: 999px;
    transform: translateX(-50%);
    background: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-soft);
    color: var(--text-soft);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.icon-btn:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    color: var(--text);
    background: var(--surface);
}

.mobile-toggle {
    display: none;
}

/* Reusable */
.section {
    padding: 110px 0;
}

.section-kicker {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    color: var(--accent);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.section-kicker::before {
    content: "";
    width: 32px;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.section-title {
    max-width: 760px;
    margin-bottom: 18px;
    font-size: clamp(2rem, 4.4vw, 3.45rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
}

.section-intro {
    max-width: 720px;
    color: var(--muted);
    font-size: 1.02rem;
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 44px;
}

.section-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-soft);
    font-weight: 650;
    font-size: 0.88rem;
    white-space: nowrap;
}

.section-link:hover {
    color: var(--accent);
}

.card {
    background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--surface) 82%, transparent));
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* Hero */
.hero {
    min-height: calc(100vh - var(--header-h));
    display: flex;
    align-items: center;
    padding: 64px 0 90px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    gap: clamp(46px, 7vw, 94px);
    align-items: center;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 24px;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface-soft);
    color: var(--text-soft);
    font-size: 0.78rem;
    font-weight: 650;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 5px rgba(56, 217, 150, 0.08), 0 0 18px rgba(56, 217, 150, 0.45);
}

.hero h1 {
    max-width: 850px;
    font-size: clamp(3rem, 7.2vw, 6.1rem);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.hero-subtitle {
    margin-top: 24px;
    max-width: 690px;
    color: var(--text-soft);
    font-size: clamp(1rem, 1.55vw, 1.18rem);
}

.hero-role {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.82rem;
}

.hero-role::before {
    content: "//";
    color: var(--accent);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 11px;
    margin-top: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 48px;
    padding: 0 20px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--text);
    font-size: 0.88rem;
    font-weight: 700;
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    background: var(--surface);
}

.btn-primary {
    border-color: transparent;
    background: linear-gradient(135deg, #ec1823, #b40812);
    color: #fff;
    box-shadow: 0 12px 34px rgba(229, 9, 20, 0.24);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #ff2632, #c60a15);
    box-shadow: 0 15px 38px rgba(229, 9, 20, 0.31);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 42px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
}

.hero-meta-item {
    display: grid;
    gap: 3px;
}

.hero-meta-item small {
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-meta-item strong {
    font-size: 0.9rem;
    font-weight: 650;
}

.portrait-wrap {
    position: relative;
    max-width: 420px;
    margin-inline: auto;
}

.portrait-card {
    position: relative;
    aspect-ratio: 0.84;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.portrait-card::before {
    content: "";
    position: absolute;
    inset: -2px;
    z-index: 2;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(145deg, rgba(229, 9, 20, 0.55), transparent 36%, transparent 70%, rgba(255, 122, 24, 0.35));
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask-composite: exclude;
    padding: 1px;
}

.portrait-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    filter: contrast(1.02);
}

.portrait-overlay {
    position: absolute;
    inset: auto 0 0;
    padding: 54px 24px 22px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.86));
    color: #fff;
}

.portrait-overlay strong {
    display: block;
    font-size: 1rem;
}

.portrait-overlay span {
    color: rgba(255, 255, 255, 0.68);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
}

.float-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 10px 13px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    color: var(--text-soft);
    font-size: 0.76rem;
    font-weight: 700;
}

.float-badge i {
    color: var(--accent);
}

.float-badge.one {
    left: -32px;
    top: 18%;
}

.float-badge.two {
    right: -28px;
    bottom: 20%;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 22px;
    margin-top: 40px;
}

.about-copy,
.focus-panel {
    padding: clamp(24px, 4vw, 38px);
}

.about-copy p {
    color: var(--text-soft);
    font-size: 1rem;
}

.about-copy p + p {
    margin-top: 16px;
}

.quote-line {
    margin-top: 26px;
    padding-left: 18px;
    border-left: 2px solid var(--accent);
    color: var(--text);
    font-weight: 650;
}

.focus-list {
    display: grid;
    gap: 12px;
}

.focus-item {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 13px;
    align-items: start;
    padding: 15px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: var(--surface-soft);
}

.focus-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--accent-soft);
    color: var(--accent);
}

.focus-item h3 {
    margin-bottom: 2px;
    font-size: 0.94rem;
}

.focus-item p {
    color: var(--muted);
    font-size: 0.79rem;
}

/* Projects */
.featured-project {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: 0;
    overflow: hidden;
    margin-bottom: 22px;
}

.featured-content {
    padding: clamp(28px, 5vw, 48px);
}

.project-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    color: var(--accent);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.project-label::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 15px rgba(229, 9, 20, 0.5);
}

.featured-content h3 {
    margin-bottom: 14px;
    font-size: clamp(2rem, 4vw, 3.3rem);
    line-height: 1.04;
    letter-spacing: -0.045em;
}

.featured-content p {
    max-width: 650px;
    color: var(--muted);
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
}

.tech-chip {
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-soft);
    color: var(--text-soft);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.68rem;
}

.featured-visual {
    position: relative;
    min-height: 370px;
    overflow: hidden;
    border-left: 1px solid var(--line);
    background:
        radial-gradient(circle at 68% 22%, rgba(255, 122, 24, 0.28), transparent 32%),
        radial-gradient(circle at 32% 70%, rgba(229, 9, 20, 0.32), transparent 35%),
        #090b10;
}

.featured-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 36px 36px;
    mask-image: radial-gradient(circle at center, black, transparent 75%);
}

.visual-window {
    position: absolute;
    z-index: 2;
    left: 50%;
    top: 50%;
    width: min(84%, 370px);
    transform: translate(-50%, -50%) rotate(-4deg);
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 20px;
    overflow: hidden;
    background: rgba(8, 11, 16, 0.9);
    box-shadow: 0 35px 60px rgba(0,0,0,.42);
}

.window-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 34px;
    padding: 0 12px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.window-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255,255,255,.28);
}

.window-body {
    display: grid;
    gap: 13px;
    padding: 22px;
}

.mock-row {
    height: 13px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
}

.mock-row.red {
    width: 72%;
    background: linear-gradient(90deg, rgba(229,9,20,.95), rgba(255,122,24,.72));
}

.mock-row.mid { width: 83%; }
.mock-row.short { width: 54%; }

.mock-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.mock-card {
    min-height: 88px;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 12px;
    background: rgba(255,255,255,.035);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 290px;
    padding: 28px;
    overflow: hidden;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(229, 9, 20, 0.35);
}

.project-number {
    position: absolute;
    right: 22px;
    top: 17px;
    color: var(--line-strong);
    font-family: "JetBrains Mono", monospace;
    font-size: 2.6rem;
    font-weight: 700;
}

.project-icon {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    margin-bottom: 24px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--accent);
    font-size: 1rem;
}

.project-card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
    letter-spacing: -0.025em;
}

.project-card p {
    color: var(--muted);
    font-size: 0.9rem;
}

.project-card .project-tech {
    margin-top: auto;
    padding-top: 22px;
}

.card-links {
    display: flex;
    gap: 12px;
    margin-top: 18px;
}

.card-links a {
    color: var(--text-soft);
    font-size: 0.8rem;
    font-weight: 700;
}

.card-links a:hover {
    color: var(--accent);
}

/* Skills */
.skills-shell {
    margin-top: 42px;
    padding: clamp(24px, 4vw, 40px);
}

.skill-group + .skill-group {
    margin-top: 34px;
    padding-top: 30px;
    border-top: 1px solid var(--line);
}

.skill-group-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 20px;
}

.skill-group h3 {
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.skill-group-note {
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.66rem;
}

.logo-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tech-logo {
    position: relative;
    display: grid;
    place-items: center;
    width: 62px;
    height: 62px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface-soft);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tech-logo:hover {
    z-index: 4;
    transform: translateY(-5px);
    border-color: var(--line-strong);
    background: var(--surface-2);
}

.tech-logo img {
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.tech-logo i {
    color: var(--text-soft);
    font-size: 1.55rem;
}

.tech-logo::after {
    content: attr(data-label);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    z-index: 10;
    width: max-content;
    max-width: 180px;
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 8px;
    transform: translate(-50%, 5px);
    background: var(--bg-elevated);
    color: var(--text);
    box-shadow: 0 12px 30px rgba(0,0,0,.22);
    font-size: 0.7rem;
    font-weight: 650;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.tech-logo:hover::after,
.tech-logo:focus-visible::after {
    opacity: 1;
    transform: translate(-50%, 0);
}

.tech-logo.wordmark {
    width: auto;
    min-width: 62px;
    padding-inline: 14px;
    color: var(--text-soft);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.68rem;
    font-weight: 700;
}

/* Research */
.research-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 22px;
    margin-top: 42px;
}

.publication-card,
.research-side {
    padding: clamp(26px, 4vw, 38px);
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.pub-badge {
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-soft);
    color: var(--muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.65rem;
}

.publication-card h3 {
    max-width: 720px;
    margin-bottom: 12px;
    font-size: clamp(1.45rem, 3vw, 2.2rem);
    line-height: 1.18;
    letter-spacing: -0.035em;
}

.publication-card p {
    color: var(--muted);
}

.pub-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.research-side h3 {
    margin-bottom: 20px;
    font-size: 1.15rem;
}

.research-list {
    display: grid;
    gap: 12px;
}

.research-item {
    padding: 14px 15px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-soft);
}

.research-item strong {
    display: block;
    font-size: 0.9rem;
}

.research-item span {
    color: var(--muted);
    font-size: 0.78rem;
}

/* Education */
.journey-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin-top: 42px;
}

.journey-card {
    padding: clamp(26px, 4vw, 38px);
}

.journey-card h3 {
    margin-bottom: 22px;
    font-size: 1.15rem;
}

.timeline {
    display: grid;
    gap: 22px;
}

.timeline-item {
    position: relative;
    padding-left: 24px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 7px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 5px var(--accent-soft);
}

.timeline-item::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 20px;
    bottom: -24px;
    width: 1px;
    background: var(--line);
}

.timeline-item:last-child::after {
    display: none;
}

.timeline-item small {
    display: block;
    margin-bottom: 5px;
    color: var(--accent);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.67rem;
}

.timeline-item strong {
    display: block;
    font-size: 0.95rem;
}

.timeline-item p {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.8rem;
}

.credential-list {
    display: grid;
    gap: 10px;
}

.credential {
    display: flex;
    align-items: flex-start;
    gap: 13px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-soft);
}

.credential-icon {
    display: grid;
    place-items: center;
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: var(--accent-soft);
    color: var(--accent);
}

.credential strong {
    display: block;
    font-size: 0.86rem;
}

.credential span {
    display: block;
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.73rem;
}

/* Contact */
.contact-panel {
    position: relative;
    overflow: hidden;
    padding: clamp(32px, 6vw, 62px);
}

.contact-panel::before {
    content: "";
    position: absolute;
    right: -100px;
    top: -140px;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(229, 9, 20, 0.16), transparent 68%);
}

.contact-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 42px;
    align-items: end;
}

.contact-panel h2 {
    max-width: 720px;
    font-size: clamp(2.3rem, 5vw, 4.5rem);
    line-height: 1.04;
    letter-spacing: -0.055em;
}

.contact-panel p {
    max-width: 620px;
    margin-top: 18px;
    color: var(--muted);
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.social-stack {
    display: grid;
    grid-template-columns: repeat(3, 46px);
    gap: 9px;
}

.social-stack a {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--text-soft);
    transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.social-stack a:hover {
    transform: translateY(-3px);
    color: var(--accent);
    border-color: rgba(229, 9, 20, 0.32);
}

.copy-status {
    min-height: 20px;
    margin-top: 10px;
    color: var(--green);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
}

/* Footer */
.footer {
    padding: 24px 0 34px;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.78rem;
}

.footer a:hover {
    color: var(--text);
}

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 500;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}

/* Responsive */
@media (max-width: 980px) {
    .nav-links {
        position: fixed;
        top: calc(var(--header-h) - 1px);
        left: 20px;
        right: 20px;
        display: grid;
        gap: 4px;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 16px;
        background: color-mix(in srgb, var(--bg-elevated) 96%, transparent);
        box-shadow: var(--shadow);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
        transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: auto;
        transform: none;
    }

    .nav-links a {
        padding: 12px;
    }

    .nav-links a.active::after {
        display: none;
    }

    .mobile-toggle {
        display: grid;
    }

    .hero-grid,
    .about-grid,
    .featured-project,
    .research-grid,
    .journey-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 40px;
    }

    .portrait-wrap {
        width: min(100%, 430px);
    }

    .featured-visual {
        border-left: 0;
        border-top: 1px solid var(--line);
        min-height: 320px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        align-items: start;
    }
}

@media (max-width: 700px) {
    :root {
        --header-h: 68px;
    }

    .container {
        width: min(calc(100% - 28px), var(--container));
    }

    .brand-text {
        display: none;
    }

    .section {
        padding: 80px 0;
    }

    .section-head {
        display: block;
        margin-bottom: 34px;
    }

    .section-link {
        margin-top: 16px;
    }

    .hero {
        min-height: auto;
        padding: 44px 0 74px;
    }

    .hero h1 {
        font-size: clamp(2.8rem, 15vw, 4.4rem);
    }

    .hero-meta {
        gap: 18px 24px;
    }

    .float-badge {
        display: none;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        min-height: 270px;
    }

    .skills-shell {
        padding: 22px;
    }

    .skill-group-head {
        align-items: start;
        flex-direction: column;
        gap: 5px;
    }

    .tech-logo {
        width: 56px;
        height: 56px;
        border-radius: 14px;
    }

    .tech-logo img {
        width: 31px;
        height: 31px;
    }

    .social-stack {
        grid-template-columns: repeat(6, 42px);
    }

    .social-stack a {
        width: 42px;
        height: 42px;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 460px) {
    .hero-actions,
    .project-actions,
    .contact-actions {
        display: grid;
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }

    .social-stack {
        grid-template-columns: repeat(3, 42px);
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}