/* ══════════════════════════════════════════════════════════════════
   TMRM / aarekh — Design System
   Material Design 3 Dark Theme · WCAG AAA Compliant
   ══════════════════════════════════════════════════════════════════ */

/* ─── M3 COLOR TOKENS ─── */
:root {
    /* Surfaces */
    --md-surface: #0e1118;
    --md-surface-dim: #090c13;
    --md-surface-bright: #363942;
    --md-surface-container-lowest: #070a10;
    --md-surface-container-low: #141821;
    --md-surface-container: #1a1e28;
    --md-surface-container-high: #252932;
    --md-surface-container-highest: #30343d;

    /* Primary — Gold (Brand) */
    --md-primary: #d4b46a;
    --md-on-primary: #3a2e00;
    --md-primary-container: #534400;
    --md-on-primary-container: #f2df9e;

    /* Secondary — Blue (Research, links) */
    --md-secondary: #a6c8ff;
    --md-on-secondary: #002f6c;
    --md-secondary-container: #00458b;
    --md-on-secondary-container: #d5e3ff;

    /* Tertiary — Teal (BCI/Tech accent) */
    --md-tertiary: #7dd6c0;
    --md-on-tertiary: #003830;
    --md-tertiary-container: #005046;
    --md-on-tertiary-container: #99f2db;

    /* Text */
    --md-on-surface: #e4e2db;
    --md-on-surface-variant: #c8c6bf;

    /* Outlines */
    --md-outline: #928f89;
    --md-outline-variant: #47474b;

    /* Inverse */
    --md-inverse-surface: #e4e2db;
    --md-inverse-on-surface: #303030;
    --md-inverse-primary: #6d5e0f;

    /* Error */
    --md-error: #ffb4ab;
    --md-on-error: #690005;

    /* Scrim/Shadow */
    --md-scrim: #000000;
    --md-shadow: #000000;

    --muted: var(--md-outline);
    --card: var(--md-surface-container);
    --border: var(--md-outline-variant);

    /* Nav Gradients Defaults (Dark) */
    --nav-bg: linear-gradient(to bottom, rgba(14, 17, 24, 0.95), transparent);
    --nav-scrolled-bg: rgba(14, 17, 24, 0.92);
    --mobile-menu-bg: rgba(14, 17, 24, 0.97);

    /* RGB components for semi-transparent accents (Gold: 212, 180, 106) */
    --md-primary-rgb: 212, 180, 106;
    --accent2: var(--md-secondary);
    --dim: var(--md-on-surface-variant);
    --muted: var(--md-outline);
    --card: var(--md-surface-container);
    --border: var(--md-outline-variant);

    /* ─── TYPOGRAPHY SCALE ─── */
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-body: 'Crimson Pro', Georgia, serif;
    --font-mono: 'DM Mono', 'Fira Code', monospace;

    /* ─── SPACING ─── */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;
    --space-4xl: 7rem;

    /* ─── RADIUS ─── */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* ─── TRANSITIONS ─── */
    --ease-standard: cubic-bezier(0.2, 0, 0, 1);
    --ease-decelerate: cubic-bezier(0, 0, 0, 1);
    --ease-accelerate: cubic-bezier(0.3, 0, 1, 1);
    --duration-short: 200ms;
    --duration-medium: 400ms;
    --duration-long: 600ms;
}

/* ─── M3 LIGHT THEME TOKENS ─── */
[data-theme='light'] {
    /* Surfaces — Darker Cream (Dusty Tone) to reduce eye glare */
    --md-surface: #f2efe4;
    --md-surface-dim: #e4e1d4;
    --md-surface-bright: #faf8f0;
    --md-surface-container-lowest: #ffffff;
    --md-surface-container-low: #ebe7d9;
    --md-surface-container: #e2decb;
    --md-surface-container-high: #d9d4bf;
    --md-surface-container-highest: #d0cbb2;

    /* Primary — Sharp Royal Indigo (clearly blue but deep) */
    --md-primary: #0046b8;
    --md-on-primary: #ffffff;
    --md-primary-container: #d9e2ff;
    --md-on-primary-container: #001944;

    /* Secondary — Deep Slate Gray */
    --md-secondary: #40485d;
    --md-on-secondary: #ffffff;
    --md-secondary-container: #dee1f9;
    --md-on-secondary-container: #161b2c;

    /* Tertiary — Professional Pine */
    --md-tertiary: #0046b8;
    --md-on-tertiary: #ffffff;
    --md-tertiary-container: #0046b8;
    --md-on-tertiary-container: #00201a;

    /* Text — PURE CONTRAST but slightly softer black for eyes */
    --md-on-surface: #000000;
    --md-on-surface-variant: #282a2e;

    /* Outlines */
    --md-outline: #5c5f67;
    --md-outline-variant: #a0a4aa;

    /* Background Gradients (Dynamic) */
    --nav-bg: linear-gradient(to bottom, rgba(242, 239, 228, 0.98), transparent);
    --nav-scrolled-bg: rgba(242, 239, 228, 0.95);
    --mobile-menu-bg: rgba(242, 239, 228, 0.98);

    /* RGB components for semi-transparent accents (Royal Indigo: 0, 70, 184) */
    --md-primary-rgb: 0, 70, 184;
}


/* ─── RESET & BASE ─── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--md-surface);
    color: var(--md-on-surface);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.75;
    overflow-x: hidden;
    min-height: 100vh;
}

::selection {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

a {
    color: var(--md-secondary);
    text-decoration: none;
    transition: color var(--duration-short) var(--ease-standard);
}

a:hover {
    color: var(--md-on-surface);
}

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


/* ══════════════════════════════════════════════════════════════════
   CANVAS / HERO BACKGROUND
   ══════════════════════════════════════════════════════════════════ */

.matrix-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.75;
    z-index: 0;
}

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
    pointer-events: none;
}

.hero-content a,
.hero-content button {
    pointer-events: auto;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: var(--space-sm);
}

.logo-svg {
    width: 52px;
    height: 84px;
    color: var(--md-primary);
    filter: none;
}

.site-wordmark {
    text-align: left;
}

.site-name {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4.5rem);
    letter-spacing: -0.02em;
    color: var(--md-on-surface);
    line-height: 0.95;
}

.site-sub {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.28em;
    color: var(--md-primary);
    text-transform: uppercase;
    margin-top: 0.3rem;
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-style: italic;
    color: var(--md-on-surface-variant);
    max-width: 520px;
    letter-spacing: 0.01em;
}

.hero-name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--md-secondary);
    text-transform: uppercase;
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--md-outline);
    text-transform: uppercase;
    z-index: 10;
    animation: float 2.5s ease-in-out infinite;
}

.scroll-hint::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--md-outline), transparent);
}

@keyframes float {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(6px);
    }
}


/* ══════════════════════════════════════════════════════════════════
   NAVIGATION — M3 Top App Bar
   ══════════════════════════════════════════════════════════════════ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--nav-bg);
    backdrop-filter: blur(0px);
    transition: backdrop-filter var(--duration-medium), background var(--duration-medium);
}

.nav.scrolled {
    background: var(--nav-scrolled-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--md-outline-variant);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--md-on-surface) !important;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--md-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: color var(--duration-short);
    position: relative;
    padding: 0.4rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--md-primary);
    transition: width var(--duration-medium) var(--ease-standard);
    border-radius: 1px;
}

.nav-links a:hover {
    color: var(--md-on-surface);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--md-primary);
}

.nav-links a.active::after {
    width: 100%;
}

/* Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    z-index: 200;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--md-on-surface);
    transition: transform var(--duration-medium) var(--ease-standard),
        opacity var(--duration-short);
    border-radius: 1px;
}

.nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--mobile-menu-bg);
    backdrop-filter: blur(24px);
    z-index: 150;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu a {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: color var(--duration-short);
}

.mobile-menu a:hover {
    color: var(--md-primary);
}


/* ══════════════════════════════════════════════════════════════════
   SECTION LAYOUT
   ══════════════════════════════════════════════════════════════════ */

.section {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-xl);
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.3em;
    color: var(--md-primary);
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.2rem);
    line-height: 1.1;
    color: var(--md-on-surface);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.divider {
    max-width: 1100px;
    margin: 0 auto;
    height: 1px;
    background: var(--md-outline-variant);
}


/* ══════════════════════════════════════════════════════════════════
   PAGE HEADER (for sub-pages)
   ══════════════════════════════════════════════════════════════════ */

.page-header {
    position: relative;
    overflow: hidden;
    padding: 10rem var(--space-xl) var(--space-3xl);
    min-height: 320px;
    display: flex;
    align-items: flex-end;
}

.page-header .matrix-canvas {
    opacity: 0.35;
}

.page-header-content {
    position: relative;
    z-index: 10;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    pointer-events: none;
}

.page-header-content a,
.page-header-content button {
    pointer-events: auto;
}


/* ══════════════════════════════════════════════════════════════════
   ABOUT SECTION
   ══════════════════════════════════════════════════════════════════ */

.about-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-3xl);
    padding-top: var(--space-xl);
    align-items: start;
}

.about-intro {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: var(--space-lg);
}

.about-avatar {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--md-outline-variant);
    box-shadow: 0 0 30px -8px rgba(194, 175, 128, 0.15);
    flex-shrink: 0;
}

.about-subtitle {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--md-primary);
}

.about-bio p {
    color: var(--md-on-surface-variant);
    margin-bottom: var(--space-md);
    font-size: 1.05rem;
}

.about-bio strong {
    color: var(--md-on-surface);
    font-weight: 600;
}

.about-bio em {
    color: var(--md-primary);
}

.about-right {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-top: 0.5rem;
}

/* M3 Stat Card — using Surface Container hierarchy */
.stat-card {
    background: var(--md-surface-container-low);
    border-left: 3px solid var(--md-primary);
    padding: 1.2rem 1.5rem;
    transition: background var(--duration-medium) var(--ease-standard),
        border-color var(--duration-short),
        transform var(--duration-short);
}

.stat-card:hover {
    background: var(--md-surface-container);
    border-left-color: var(--md-secondary);
    transform: translateX(4px);
}

.stat-num {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--md-on-surface);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    color: var(--md-outline);
    text-transform: uppercase;
    margin-top: 0.3rem;
}


/* ══════════════════════════════════════════════════════════════════
   FEATURED SECTION (Homepage summaries)
   ══════════════════════════════════════════════════════════════════ */

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1px;
    background: var(--md-outline-variant);
    border: 1px solid var(--md-outline-variant);
    margin-top: var(--space-md);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.featured-card {
    background: var(--md-surface-container-low);
    padding: var(--space-xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    transition: background var(--duration-medium) var(--ease-standard);
    position: relative;
    text-decoration: none;
    color: inherit;
}

.featured-card:hover {
    background: var(--md-surface-container);
}

/* M3 State Layer on hover */
.featured-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--md-primary);
    opacity: 0;
    transition: opacity var(--duration-short);
    pointer-events: none;
}

.featured-card:hover::before {
    opacity: 0.04;
}

.featured-card-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.25em;
    color: var(--md-primary);
    text-transform: uppercase;
}

.featured-card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--md-on-surface);
    line-height: 1.3;
}

.featured-card-desc {
    color: var(--md-on-surface-variant);
    font-size: 0.92rem;
    line-height: 1.7;
}

.featured-card-meta {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--md-outline);
    text-transform: uppercase;
    margin-top: auto;
    padding-top: var(--space-sm);
}

.view-all {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--md-primary);
    text-decoration: none;
    margin-top: var(--space-xl);
    padding: 0.6rem 0;
    transition: color var(--duration-short), gap var(--duration-medium) var(--ease-standard);
    border-bottom: 1px solid transparent;
}

.view-all:hover {
    color: var(--md-on-surface);
    gap: 1rem;
}

.view-all::after {
    content: '→';
    transition: transform var(--duration-medium) var(--ease-standard);
}

.view-all:hover::after {
    transform: translateX(4px);
}


/* ══════════════════════════════════════════════════════════════════
   BLOG CARDS
   ══════════════════════════════════════════════════════════════════ */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1px;
    background: var(--md-outline-variant);
    border: 1px solid var(--md-outline-variant);
    margin-top: var(--space-md);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.blog-card {
    background: var(--md-surface-container-low);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    text-decoration: none;
    color: inherit;
    transition: background var(--duration-medium) var(--ease-standard);
    position: relative;
}

.blog-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--md-primary);
    opacity: 0;
    transition: opacity var(--duration-short);
    pointer-events: none;
}

.blog-card:hover {
    background: var(--md-surface-container);
}

.blog-card:hover::before {
    opacity: 0.04;
}

.blog-tag {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    color: var(--md-primary);
    text-transform: uppercase;
}

.blog-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    line-height: 1.25;
    color: var(--md-on-surface);
}

.blog-excerpt {
    font-size: 0.92rem;
    color: var(--md-on-surface-variant);
    line-height: 1.7;
}

.blog-meta {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--md-outline);
    text-transform: uppercase;
    margin-top: auto;
    padding-top: var(--space-sm);
}


/* ══════════════════════════════════════════════════════════════════
   PUBLICATIONS
   ══════════════════════════════════════════════════════════════════ */

.pub-list {
    margin-top: var(--space-md);
}

.pub-item {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: var(--space-lg);
    align-items: start;
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--md-outline-variant);
}

.pub-year {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--md-outline);
    padding-top: 0.3rem;
}

.pub-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--md-on-surface);
    line-height: 1.35;
    margin-bottom: 0.4rem;
}

.pub-venue {
    font-size: 0.88rem;
    color: var(--md-on-surface-variant);
    font-style: italic;
    line-height: 1.6;
}

.pub-authors {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--md-outline);
    margin-top: 0.5rem;
}

.pub-link {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--md-secondary);
    text-decoration: none;
    padding-top: 0.3rem;
    transition: color var(--duration-short);
    white-space: nowrap;
}

.pub-link:hover {
    color: var(--md-on-surface);
}


/* ══════════════════════════════════════════════════════════════════
   PROJECTS
   ══════════════════════════════════════════════════════════════════ */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--md-outline-variant);
    margin-top: var(--space-md);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.project-card {
    background: var(--md-surface-container-low);
    padding: var(--space-2xl);
    position: relative;
    overflow: hidden;
    transition: background var(--duration-medium) var(--ease-standard);
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--md-primary);
    opacity: 0;
    transition: opacity var(--duration-short);
    pointer-events: none;
}

.project-card:hover {
    background: var(--md-surface-container);
}

.project-card:hover::before {
    opacity: 0.04;
}

.project-num {
    font-family: var(--font-display);
    font-size: 3.5rem;
    color: var(--md-outline-variant);
    line-height: 1;
    margin-bottom: var(--space-md);
    transition: color var(--duration-medium);
}

.project-card:hover .project-num {
    color: var(--md-outline);
}

.project-name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--md-on-surface);
    margin-bottom: 0.6rem;
    line-height: 1.2;
}

.project-desc {
    font-size: 0.92rem;
    color: var(--md-on-surface-variant);
    line-height: 1.7;
}

.project-collab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--md-on-surface);
    margin-top: 1rem;
    opacity: 0.9;
}

.project-collab svg {
    opacity: 0.7;
    color: var(--md-primary);
    flex-shrink: 0;
}

/* M3-Style Chips */
.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1.2rem;
}

.chip {
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface-variant);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    transition: border-color var(--duration-short), color var(--duration-short),
        background var(--duration-short);
}

.chip:hover {
    border-color: var(--md-outline);
    color: var(--md-on-surface);
    background: rgba(255, 255, 255, 0.04);
}

/* Collab-specific chips (teal highlight) */
.chip-collab {
    border-color: var(--md-tertiary-container);
    color: var(--md-tertiary);
    background: rgba(125, 214, 192, 0.06);
}

.chip-collab:hover {
    border-color: var(--md-tertiary);
    color: var(--md-on-primary-container);
    background: rgba(var(--md-primary-rgb), 0.12);
}


/* ══════════════════════════════════════════════════════════════════
   COLLABORATION CARDS — "Seeking" section
   ══════════════════════════════════════════════════════════════════ */

.collab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-md);
}

.collab-card {
    background: var(--md-surface-container-low);
    border: 1px solid var(--md-primary-container);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    transition: border-color var(--duration-medium) var(--ease-standard),
        background var(--duration-medium),
        box-shadow var(--duration-medium);
}

.collab-card:hover {
    border-color: var(--md-primary);
    background: var(--md-surface-container);
    box-shadow: 0 0 40px -12px rgba(var(--md-primary-rgb), 0.15);
}

/* Subtle gradient top stripe */
.collab-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    /* background: linear-gradient(90deg, var(--md-primary), var(--md-secondary)); */
    background: var(--md-primary);
    opacity: 0.6;
    transition: opacity var(--duration-short);
}

.collab-card:hover::after {
    opacity: 1;
}

.collab-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
}

.collab-status {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--md-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Live pulsing dot */
.collab-pulse {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--md-primary);
    position: relative;
    flex-shrink: 0;
}

.collab-pulse::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid var(--md-primary);
    animation: pulse-ring 2s ease-out infinite;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.8);
        opacity: 0.8;
    }

    70% {
        transform: scale(1.6);
        opacity: 0;
    }

    100% {
        transform: scale(1.6);
        opacity: 0;
    }
}

.collab-needs {
    margin-top: var(--space-sm);
}

.collab-need-label {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--md-outline);
    margin-bottom: 0.4rem;
}

@media (max-width: 480px) {
    .collab-grid {
        grid-template-columns: 1fr;
    }
}


/* ══════════════════════════════════════════════════════════════════
   NETWORK — Compact Panel
   ══════════════════════════════════════════════════════════════════ */

.network-panel {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: 0;
}

.network-row {
    display: flex;
    align-items: baseline;
    gap: var(--space-lg);
    padding: 0.9rem 0;
}

.network-row-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--md-outline);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 130px;
    flex-shrink: 0;
    white-space: nowrap;
}

.network-row-label svg {
    opacity: 0.5;
    flex-shrink: 0;
}

.network-row-items {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.network-row-divider {
    height: 1px;
    background: var(--md-outline-variant);
    opacity: 0.5;
}

.network-person {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: var(--md-on-surface);
    text-decoration: none;
    padding: 0.25rem 0.65rem 0.25rem 0.5rem;
    border-radius: var(--radius-full);
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    transition: background var(--duration-short),
        border-color var(--duration-short),
        color var(--duration-short);
    white-space: nowrap;
}

.network-person svg {
    color: var(--md-primary);
    opacity: 0.7;
    flex-shrink: 0;
}

.network-person:hover {
    background: var(--md-surface-container-highest);
    border-color: var(--md-primary);
    color: var(--md-primary);
}

.network-aff {
    font-family: var(--font-mono);
    font-size: 0.52rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--md-outline);
    margin-left: 0.2rem;
}

.network-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.88rem;
    color: var(--md-on-surface);
    white-space: nowrap;
}

.network-inline svg {
    color: var(--md-secondary);
    opacity: 0.7;
    flex-shrink: 0;
}

.network-venue-chip {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    color: var(--md-on-surface-variant);
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-full);
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .network-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .network-row-label {
        min-width: auto;
    }

    .network-person,
    .network-inline {
        white-space: normal;
    }
}







/* ══════════════════════════════════════════════════════════════════
   CV / VISUAL TIMELINE
   ══════════════════════════════════════════════════════════════════ */

.timeline {
    position: relative;
    margin-top: var(--space-md);
    padding-left: 28px;
}

/* Vertical connecting line */
.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--md-outline-variant);
}

.timeline-entry {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-entry:last-child {
    padding-bottom: 0;
}

/* Timeline node (dot) */
.timeline-node {
    position: absolute;
    left: -28px;
    top: 6px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--md-surface-container);
    border: 2px solid var(--md-outline-variant);
    z-index: 2;
}

/* Active / current node */
.timeline-node--active {
    background: var(--md-primary);
    border-color: var(--md-primary);
    box-shadow: 0 0 0 4px rgba(194, 175, 128, 0.15);
}

.timeline-node--active::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    border: 2px solid var(--md-primary);
    animation: pulse-ring 2s ease-out infinite;
    opacity: 0.5;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--md-outline);
    margin-bottom: 0.5rem;
}

.timeline-card {
    background: var(--md-surface-container-low);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    padding: 1.2rem 1.5rem;
    transition: background var(--duration-medium),
        border-color var(--duration-medium);
}

.timeline-card:hover {
    background: var(--md-surface-container);
    border-color: var(--md-primary);
}

a.timeline-card--link {
    text-decoration: none;
    display: block;
    cursor: pointer;
}

.timeline-role {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--md-on-surface);
    margin-bottom: 0.25rem;
    line-height: 1.3;
}

.timeline-org {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    color: var(--md-primary);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--md-on-surface-variant);
    line-height: 1.65;
}

@media (max-width: 600px) {
    .timeline {
        padding-left: 22px;
    }

    .timeline-node {
        left: -22px;
        width: 9px;
        height: 9px;
    }

    .timeline::before {
        left: 4px;
    }
}

/* DOI link inside timeline cards */
.pub-doi {
    display: inline-block;
    margin-top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--md-primary);
    text-decoration: none;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--md-primary);
    border-radius: var(--radius-full);
    transition: background var(--duration-short),
        color var(--duration-short);
}

.pub-doi:hover {
    background: var(--md-primary);
    color: var(--md-on-primary);
}


/* ══════════════════════════════════════════════════════════════════
   GALLERY
   ══════════════════════════════════════════════════════════════════ */

.gallery-timeline {
    margin-top: var(--space-md);
}

.photo-strip {
    display: flex;
    gap: var(--space-md);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--md-outline-variant) transparent;
}

.photo-strip::-webkit-scrollbar {
    height: 4px;
}

.photo-strip::-webkit-scrollbar-track {
    background: transparent;
}

.photo-strip::-webkit-scrollbar-thumb {
    background: var(--md-outline-variant);
    border-radius: var(--radius-full);
}

.photo-entry {
    flex: 0 0 auto;
    height: 240px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--md-surface-container-low);
    border: 1px solid var(--md-outline-variant);
    position: relative;
    cursor: pointer;
    transition: transform var(--duration-medium);
}

.photo-entry img {
    height: 100%;
    width: auto;
    min-width: 100%;
    object-fit: cover;
    transition: transform var(--duration-long);
}

.photo-entry:hover img {
    transform: scale(1.05);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.8rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    opacity: 0;
    transition: opacity var(--duration-medium);
    pointer-events: none;
}

.photo-entry:hover .gallery-caption {
    opacity: 1;
}

.gallery-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--md-surface-container-low) 0%, var(--md-surface-container-highest) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--md-outline);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: var(--space-xl);
    text-align: center;
}

.gallery-icon {
    font-size: 2rem;
    opacity: 0.4;
}


/* ══════════════════════════════════════════════════════════════════
   CONNECT — Compact Panel
   ══════════════════════════════════════════════════════════════════ */

.connect-panel {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.connect-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--md-on-surface);
    text-decoration: none;
    padding: 0.4rem 0.85rem 0.4rem 0.65rem;
    border-radius: var(--radius-full);
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    transition: background var(--duration-short),
        border-color var(--duration-short),
        color var(--duration-short),
        transform var(--duration-short);
    white-space: nowrap;
}

.connect-link svg {
    flex-shrink: 0;
    opacity: 0.7;
    color: var(--md-primary);
}

.connect-link:hover {
    background: var(--md-surface-container-highest);
    border-color: var(--md-primary);
    color: var(--md-primary);
    transform: translateY(-1px);
}

.connect-link:hover svg {
    opacity: 1;
}

.connect-link-text {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}


/* ══════════════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════════════ */

.footer {
    border-top: 1px solid var(--md-outline-variant);
    padding: var(--space-xl) var(--space-xl);
    max-width: 1100px;
    margin: 0 auto;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.footer-brand-name {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--md-on-surface);
}

.footer-brand-sub {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    color: var(--md-outline);
    text-transform: uppercase;
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.footer-links a {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: color var(--duration-short);
}

.footer-links a:hover {
    color: var(--md-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--md-outline-variant);
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    color: var(--md-outline);
    text-transform: uppercase;
}

.footer-m3 {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    letter-spacing: 0.1em;
    color: var(--md-outline-variant);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.footer-m3-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--md-tertiary);
    opacity: 0.6;
}


/* ══════════════════════════════════════════════════════════════════
   REVEAL ANIMATIONS
   ══════════════════════════════════════════════════════════════════ */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-long) var(--ease-decelerate),
        transform var(--duration-long) var(--ease-decelerate);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}


/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════════ */

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .about-right {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .stat-card {
        flex: 1 1 140px;
    }

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

    .pub-item {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .pub-year {
        font-size: 0.65rem;
    }

    .cv-entry {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-main {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .hero-content {
        padding: 3rem 2rem;
        border-radius: 32px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .section {
        padding: var(--space-3xl) var(--space-lg);
    }

    .page-header {
        padding: 8rem var(--space-lg) var(--space-2xl);
        min-height: 240px;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-item:first-child {
        grid-column: span 1;
    }

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

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

    .hero-content {
        padding: 2.5rem 1.5rem;
    }
}

/* ══════════════════════════════════════════════════════════════════
   SEARCH OVERLAY
   ══════════════════════════════════════════════════════════════════ */

.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 12, 16, 0.85);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-medium) var(--ease-standard);
}

.search-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.search-container {
    width: 90%;
    max-width: 600px;
    height: fit-content;
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    transform: translateY(-20px);
    transition: transform var(--duration-medium) var(--ease-decelerate);
}

.search-overlay.active .search-container {
    transform: translateY(0);
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--md-outline-variant);
    gap: 1rem;
}

.search-icon {
    color: var(--md-primary);
    opacity: 0.8;
}

#search-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--md-on-surface);
    font-family: var(--font-body);
    font-size: 1.1rem;
    outline: none;
}

.search-close-kbd {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--md-outline);
    background: var(--md-surface-container-highest);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--md-outline-variant);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.search-result-item {
    display: block;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background var(--duration-short);
}

.search-result-item:hover {
    background: var(--md-surface-container-highest);
}

.search-result-title {
    color: var(--md-on-surface);
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.search-result-url {
    color: var(--md-primary);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    opacity: 0.7;
}

.search-no-results {
    padding: 2rem;
    text-align: center;
    color: var(--md-outline);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

/* Nav Search Trigger */
.nav-search-btn {
    background: transparent;
    border: none;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    padding: 0.5rem;
    margin-left: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--duration-short);
}

.nav-search-btn:hover {
    color: var(--md-primary);
}

.theme-toggle-btn {
    background: transparent;
    border: none;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    padding: 0.5rem;
    margin-left: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--duration-short), transform var(--duration-short);
}

.theme-toggle-btn:hover {
    color: var(--md-primary);
    transform: rotate(15deg);
}

/* Toggle icon logic */
.theme-toggle-btn .moon-icon {
    display: block;
}

.theme-toggle-btn .sun-icon {
    display: none;
}

[data-theme='light'] .theme-toggle-btn .moon-icon {
    display: none;
}

[data-theme='light'] .theme-toggle-btn .sun-icon {
    display: block;
}

/* Ensure canvas is behind content in light mode too */
[data-theme='light'] .matrix-canvas {
    opacity: 0.8;
    /* Increased visibility for light dots */
}

/* Light Mode Legibility Enhancements (Heavier font weight) */
[data-theme='light'] body {
    font-weight: 500;
}

[data-theme='light'] p,
[data-theme='light'] .timeline-desc,
[data-theme='light'] .project-desc,
[data-theme='light'] .featured-card-desc,
[data-theme='light'] .featured-card-meta {
    font-weight: 450;
    letter-spacing: 0.01em;
}

[data-theme='light'] .section-title,
[data-theme='light'] .hero-tagline,
[data-theme='light'] .nav-logo {
    font-weight: 600;
}

[data-theme='light'] .chip,
[data-theme='light'] .section-label,
[data-theme='light'] .featured-card-label,
[data-theme='light'] .project-tags span {
    font-weight: 500;
    letter-spacing: 0.12em;
}

[data-theme='light'] b,
[data-theme='light'] strong {
    font-weight: 700;
}