/* ============================================================
   Lykke · Personal Site
   Inspired by: Maryam Salehi (palette) + Emily Wilson (hero) +
                Brittany Chiang (structure) + SSTR (discipline)
   Type system: Fraunces (display) / Manrope (body) / JetBrains Mono (meta)
   ============================================================ */

/* ----- Design Tokens ---------------------------------------- */
:root {
    /* Colors — soft lavender base, deep ink, sharp indigo accent */
    --bg-base:        #FBFAFF;
    --bg-gradient-1:  #F4F0FF;
    --bg-gradient-2:  #FAF3FF;
    --bg-gradient-3:  #FFF1F4;
    --bg-card:        #FFFFFF;
    --bg-card-soft:   rgba(255, 255, 255, 0.65);

    --ink:            #1B1635;   /* deep ink, slight purple */
    --ink-2:          #322E55;
    --ink-3:          #5B5778;
    --ink-muted:      #8C88A6;
    --ink-faint:      #C7C2D8;

    --accent:         #5B4FE9;   /* primary indigo */
    --accent-2:       #C24BC2;   /* secondary lilac-magenta */
    --accent-soft:    #E5E1FF;
    --accent-tint:    #F0EDFF;

    --border:         #E8E3F5;
    --border-strong:  #D4CCEC;

    /* Typography */
    --font-display:   'Fraunces', 'Noto Serif SC', Georgia, serif;
    --font-body:      'Manrope', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:      'JetBrains Mono', 'SF Mono', Consolas, monospace;

    /* Spacing scale */
    --s-1: 4px;
    --s-2: 8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 24px;
    --s-6: 32px;
    --s-7: 48px;
    --s-8: 64px;
    --s-9: 96px;
    --s-10: 128px;

    /* Sizing */
    --container: 1180px;
    --radius-sm: 8px;
    --radius:    14px;
    --radius-lg: 22px;
    --radius-pill: 999px;

    /* Motion */
    --ease: cubic-bezier(0.32, 0.72, 0, 1);
    --t-fast: 150ms;
    --t-med:  300ms;
    --t-slow: 600ms;
}

/* ----- Reset ------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--ink);
    background: var(--bg-base);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    position: relative;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: transparent; color: inherit; }
ul, ol { list-style: none; }
em { font-style: normal; }

/* ----- Background composition (avoids flat AI gradient) ----- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(ellipse 80% 50% at 0% 0%,  var(--bg-gradient-1) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 100% 30%, var(--bg-gradient-2) 0%, transparent 60%),
        radial-gradient(ellipse 70% 50% at 50% 100%, var(--bg-gradient-3) 0%, transparent 60%),
        var(--bg-base);
}

/* Decorative floating blobs */
.bg-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    z-index: -1;
    pointer-events: none;
}
.bg-blob-1 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, #C4B5FD 0%, transparent 70%);
    top: -120px; right: -100px;
    animation: float-1 18s ease-in-out infinite;
}
.bg-blob-2 {
    width: 380px; height: 380px;
    background: radial-gradient(circle, #F9A8D4 0%, transparent 70%);
    bottom: 10%; left: -80px;
    animation: float-2 22s ease-in-out infinite;
}
@keyframes float-1 {
    0%, 100% { transform: translate(0, 0); }
    50%      { transform: translate(-40px, 40px); }
}
@keyframes float-2 {
    0%, 100% { transform: translate(0, 0); }
    50%      { transform: translate(50px, -30px); }
}

/* Subtle grain texture (kills flatness, gives paper feel) */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.035;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ----- Container ------------------------------------------- */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--s-5);
    position: relative;
    z-index: 2;
}

/* ----- Header / Top Nav ------------------------------------ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--s-4) var(--s-6);
    background: rgba(251, 250, 255, 0.75);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--t-med) var(--ease),
                background var(--t-med) var(--ease);
}
.site-header.scrolled {
    border-bottom-color: var(--border);
    background: rgba(251, 250, 255, 0.92);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--ink);
    transition: opacity var(--t-fast) var(--ease);
}
.brand:hover { opacity: 0.7; }
.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    background: var(--ink);
    color: var(--bg-base);
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1;
    font-style: italic;
    transform: rotate(-4deg);
}
.brand-text { font-style: italic; }
.brand-dot { color: var(--accent); }

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--s-2);
}
.nav-link {
    position: relative;
    padding: var(--s-2) var(--s-4);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink-3);
    border-radius: var(--radius-pill);
    transition: color var(--t-fast) var(--ease),
                background var(--t-fast) var(--ease);
}
.nav-link:hover { color: var(--ink); background: var(--accent-tint); }
.nav-link.active {
    color: var(--ink);
    background: var(--accent-tint);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--s-2);
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform var(--t-fast) var(--ease),
                opacity var(--t-fast) var(--ease);
}

/* ----- Hero ----------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px var(--s-6) var(--s-9);
    position: relative;
    z-index: 2;
}
.hero-inner {
    max-width: var(--container);
    margin: 0 auto;
    width: 100%;
    position: relative;
}
.hero-content {
    position: relative;
    z-index: 2;
    min-width: 0;          /* allow text to shrink in narrow 2-col layout */
}

.hero-status {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: 6px 14px;
    background: var(--bg-card-soft);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink-2);
    margin-bottom: var(--s-6);
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #10B981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2); }
    50%      { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ink-3);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: var(--s-5);
}
.hero-divider { color: var(--accent); margin: 0 4px; }

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7.5vw, 6.2rem);
    line-height: 1.04;
    font-weight: 400;
    letter-spacing: -0.025em;
    color: var(--ink);
    font-variation-settings: "opsz" 144, "SOFT" 30;
}
.hero-line {
    display: block;
}
.hero-name {
    font-style: italic;
    font-weight: 500;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variation-settings: "opsz" 144, "SOFT" 80, "WONK" 1;
    padding-right: 0.05em;
}
.hero-accent {
    font-style: italic;
    color: var(--accent);
    font-weight: 500;
}
.hero-accent-2 {
    font-style: italic;
    color: var(--accent-2);
    font-weight: 500;
}
.hero-italic {
    font-style: italic;
    color: var(--ink-2);
    font-weight: 500;
}

.hero-tagline {
    font-size: clamp(1.05rem, 1.4vw, 1.2rem);
    line-height: 1.6;
    color: var(--ink-3);
    max-width: 560px;
    margin-bottom: var(--s-7);
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
    margin-bottom: var(--s-8);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: 14px 22px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    transition: transform var(--t-fast) var(--ease),
                box-shadow var(--t-fast) var(--ease),
                background var(--t-fast) var(--ease),
                color var(--t-fast) var(--ease);
    white-space: nowrap;
}
.btn-primary {
    background: var(--ink);
    color: var(--bg-base);
    box-shadow: 0 4px 18px -4px rgba(27, 22, 53, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px -6px rgba(27, 22, 53, 0.35);
}
.btn-ghost {
    background: var(--bg-card-soft);
    color: var(--ink);
    border: 1px solid var(--border-strong);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    background: var(--bg-card);
    border-color: var(--ink);
    transform: translateY(-2px);
}
.btn-large {
    padding: 18px 28px;
    font-size: 1rem;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-7);
    padding-top: var(--s-5);
    border-top: 1px solid var(--border);
    max-width: 640px;
}
.hero-meta li {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.meta-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-muted);
}
.meta-value {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-2);
}

.hero-scroll {
    position: absolute;
    right: var(--s-6);
    bottom: var(--s-7);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-muted);
    z-index: 2;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--ink-muted) 0%, transparent 100%);
    position: relative;
    overflow: hidden;
}
.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--accent);
    animation: scroll-down 2s ease-in-out infinite;
}
@keyframes scroll-down {
    0%   { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}

/* ----- Hero Portrait (right side) ----------------------- */
.hero-title-row {
    display: flex;
    align-items: center;
    gap: var(--s-6);
    margin-bottom: var(--s-6);
}
.hero-title { flex: 1.3; min-width: 0; }
.hero-portrait {
    position: relative;
    flex: 0 0 auto;
    width: 380px;
    max-width: 380px;
    aspect-ratio: 1;
    z-index: 1;
}

/* Soft glow behind the portrait */
.portrait-glow {
    position: absolute;
    inset: -25%;
    z-index: -2;
    background: radial-gradient(circle at 30% 30%,
        rgba(196, 181, 253, 0.65) 0%,
        rgba(249, 168, 212, 0.45) 35%,
        rgba(91, 79, 233, 0.25) 60%,
        transparent 75%);
    filter: blur(50px);
    animation: portrait-glow-breathe 8s ease-in-out infinite;
}
@keyframes portrait-glow-breathe {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.95; }
    50%      { transform: scale(1.08) rotate(8deg); opacity: 0.75; }
}

/* Decorative rings around the portrait */
.portrait-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px dashed rgba(91, 79, 233, 0.25);
    pointer-events: none;
}
.portrait-ring-1 {
    inset: -8%;
    animation: portrait-ring-spin 40s linear infinite;
}
.portrait-ring-2 {
    inset: -18%;
    border-color: rgba(194, 75, 194, 0.18);
    border-style: dotted;
    animation: portrait-ring-spin 60s linear infinite reverse;
}
@keyframes portrait-ring-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* Sparkle decorations */
.portrait-sparkle {
    position: absolute;
    color: var(--accent);
    font-size: 1.2rem;
    line-height: 1;
    pointer-events: none;
    animation: portrait-sparkle-pulse 3s ease-in-out infinite;
}
.portrait-sparkle-1 {
    top: 4%;
    right: 8%;
    color: var(--accent-2);
    font-size: 1.5rem;
    animation-delay: 0s;
}
.portrait-sparkle-2 {
    bottom: 12%;
    left: -2%;
    color: var(--accent);
    font-size: 1.1rem;
    animation-delay: 1.2s;
}
@keyframes portrait-sparkle-pulse {
    0%, 100% { opacity: 0.4; transform: scale(0.9) rotate(0deg); }
    50%      { opacity: 1;   transform: scale(1.2) rotate(15deg); }
}

/* The circular photo frame */
.portrait-frame {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    background: linear-gradient(135deg, #1B1635 0%, #5B4FE9 100%);
    box-shadow:
        0 1px 0 0 rgba(255, 255, 255, 0.9) inset,
        0 30px 60px -20px rgba(91, 79, 233, 0.45),
        0 12px 30px -8px rgba(27, 22, 53, 0.25);
    transition: transform var(--t-slow) var(--ease);
}
.hero-portrait:hover .portrait-frame {
    transform: scale(1.02);
}
.portrait-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* The photo has the face on the right ~60% horizontally and ~25% from top */
    object-position: 65% 22%;
    display: block;
}

/* Small L badge overlapping the portrait */
.portrait-tag {
    position: absolute;
    bottom: 8%;
    right: 4%;
    width: 72px;
    height: 72px;
    background: var(--ink);
    color: var(--bg-base);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 5px solid var(--bg-base);
    box-shadow:
        0 12px 24px -6px rgba(27, 22, 53, 0.35),
        0 1px 0 0 rgba(255, 255, 255, 0.6) inset;
    z-index: 2;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    line-height: 1;
    font-style: italic;
    transform: rotate(-6deg);
    transition: transform var(--t-med) var(--ease);
}
.hero-portrait:hover .portrait-tag {
    transform: rotate(0deg) scale(1.05);
}

/* ----- Sections ------------------------------------------- */
.section {
    padding: var(--s-5) 0;
    position: relative;
    z-index: 2;
}
.section-head {
    display: flex;
    align-items: flex-start;
    gap: var(--s-5);
    margin-bottom: var(--s-6);
    padding-bottom: var(--s-5);
    border-bottom: 1px solid var(--border);
}
.section-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--accent);
    background: var(--accent-tint);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    margin-top: 6px;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: var(--s-2);
}
.title-en {
    font-family: var(--font-mono);
    font-size: 0.6em;
    color: var(--ink-muted);
    font-weight: 500;
    letter-spacing: 0;
    font-style: normal;
    margin-left: var(--s-3);
    text-transform: uppercase;
}
.section-sub {
    font-size: 0.95rem;
    color: var(--ink-3);
}

/* ----- About ---------------------------------------------- */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--s-8);
    align-items: start;
}
.about-meta dl {
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
}
.about-meta div {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--s-3);
    padding: var(--s-2) 0;
    border-bottom: 1px solid var(--border);
    align-items: baseline;
}
.about-meta div:last-child { border-bottom: none; }
.about-meta dt {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-muted);
}
.about-meta dd {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-2);
}
.about-meta dd a {
    color: var(--accent);
    border-bottom: 1px solid transparent;
    transition: border-color var(--t-fast) var(--ease);
}
.about-meta dd a:hover { border-bottom-color: var(--accent); }

.about-text {
    max-width: 640px;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--ink-2);
}
.about-text p + p { margin-top: var(--s-4); }
.about-text strong {
    font-weight: 600;
    color: var(--ink);
}
.about-text em {
    color: var(--accent);
    font-weight: 500;
    font-style: italic;
}
.inline-num {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--accent-tint);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 500;
}

/* ----- Experience ----------------------------------------- */
.exp-list {
    display: flex;
    flex-direction: column;
    gap: var(--s-7);
}
.exp-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--s-7);
    padding: var(--s-5) 0;
    border-bottom: 1px solid var(--border);
    transition: background var(--t-fast) var(--ease);
}
.exp-item:last-child { border-bottom: none; }
.exp-period {
    display: flex;
    flex-direction: column;
    gap: var(--s-2);
}
.exp-year {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ink-2);
}
.exp-tag {
    display: inline-block;
    width: max-content;
    padding: 3px 10px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--accent-tint);
    color: var(--accent);
    border-radius: var(--radius-pill);
}
.exp-role {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    line-height: 1.3;
    color: var(--ink);
    margin-bottom: var(--s-2);
    letter-spacing: -0.01em;
}
.exp-at {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-muted);
    font-weight: 400;
    font-style: italic;
}
.exp-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--ink-3);
    margin-bottom: var(--s-3);
    max-width: 640px;
}
.exp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
}
.exp-tags li {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-2);
    padding: 4px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

/* ----- Projects ------------------------------------------- */
.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--s-7);
}
.project-item {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: var(--s-7);
    align-items: center;
}
.project-item:nth-child(even) {
    direction: rtl;
}
.project-item:nth-child(even) > * {
    direction: ltr;
}

.project-visual {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow:
        0 1px 0 0 rgba(255, 255, 255, 0.8) inset,
        0 20px 50px -20px rgba(91, 79, 233, 0.25),
        0 8px 20px -8px rgba(27, 22, 53, 0.15);
    transition: transform var(--t-med) var(--ease),
                box-shadow var(--t-med) var(--ease);
    background: linear-gradient(135deg, #1B1635 0%, #5B4FE9 100%);
    cursor: zoom-in;
    isolation: isolate;
}
.project-item:hover .project-visual {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 0 rgba(255, 255, 255, 0.8) inset,
        0 30px 60px -20px rgba(91, 79, 233, 0.4),
        0 12px 30px -10px rgba(27, 22, 53, 0.2);
}
.project-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: transparent;
}
/* Hide the native controls until played; we use our own play button overlay */
.project-video:not([data-playing="true"])::-webkit-media-controls {
    opacity: 0;
    pointer-events: none;
}
.project-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    pointer-events: auto;
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: 12px 22px 12px 16px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--ink);
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 10px 30px -8px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    transition: transform var(--t-fast) var(--ease),
                background var(--t-fast) var(--ease),
                opacity var(--t-med) var(--ease);
    cursor: pointer;
}
.project-play:hover {
    background: white;
    transform: translate(-50%, -50%) scale(1.06);
}
.project-play[hidden] {
    opacity: 0;
    pointer-events: none;
}
.play-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    margin-left: -4px;
}
.project-time {
    position: absolute;
    bottom: var(--s-3);
    right: var(--s-3);
    z-index: 3;
    padding: 4px 10px;
    background: rgba(27, 22, 53, 0.7);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    backdrop-filter: blur(4px);
    pointer-events: none;
    transition: opacity var(--t-med) var(--ease);
}
.project-visual[data-playing="true"] .project-time {
    opacity: 0;
}
/* Re-show native controls when playing */
.project-video[data-playing="true"]::-webkit-media-controls {
    opacity: 1;
}

/* Fallback gradient (per-project) — shows when no video/poster loaded */
.project-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, #1B1635 0%, #5B4FE9 50%, #C24BC2 100%);
}
.project-visual:nth-of-type(odd)::before {
    background: linear-gradient(135deg, rgba(249, 168, 212, 0.9) 0%, rgba(91, 79, 233, 0.85) 100%);
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
}
.project-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.project-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 2.5vw, 1.9rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--ink);
}
.project-sub {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--ink-2);
    font-weight: 500;
}
.project-desc {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--ink-3);
    margin-top: var(--s-2);
}
.project-desc strong {
    color: var(--ink-2);
    font-weight: 600;
}
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-top: var(--s-2);
}
.project-tags li {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--accent);
    padding: 4px 10px;
    background: var(--accent-tint);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: background var(--t-fast) var(--ease),
                color var(--t-fast) var(--ease);
}
.project-item:hover .project-tags li {
    background: var(--accent);
    color: white;
}
.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-4);
    margin-top: var(--s-3);
}
.project-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ink-2);
    border-bottom: 1px solid var(--border-strong);
    padding-bottom: 2px;
    transition: color var(--t-fast) var(--ease),
                border-color var(--t-fast) var(--ease);
}
.project-link:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Publication / competition badge inside the project title */
.project-pub {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--accent);
    background: var(--accent-tint);
    padding: 3px 10px;
    border-radius: 999px;
    vertical-align: middle;
    margin-left: 6px;
    white-space: nowrap;
}

/* ----- Static (no-video) project visual --------------------
   Used for papers and competitions where there's no screen
   recording. A subtle gradient + icon + label so the card
   still has a strong visual anchor on the left side. */
.project-visual--static {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    isolation: isolate;
}
.project-visual--static::before {
    /* soft grain so it doesn't read as flat */
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
    opacity: 0.25;
    mix-blend-mode: multiply;
    pointer-events: none;
    z-index: 0;
}

.project-visual--paper {
    background:
        radial-gradient(circle at 20% 25%, rgba(99, 102, 241, 0.18), transparent 55%),
        radial-gradient(circle at 80% 80%, rgba(194, 75, 194, 0.18), transparent 55%),
        linear-gradient(135deg, #F4F0FF 0%, #FFF1F4 100%);
    color: var(--accent);
}
.project-visual--trophy {
    background:
        radial-gradient(circle at 25% 30%, rgba(255, 196, 102, 0.28), transparent 55%),
        radial-gradient(circle at 80% 80%, rgba(255, 138, 101, 0.22), transparent 55%),
        linear-gradient(135deg, #FFF6E5 0%, #FFEAEF 100%);
    color: #C2680A;
}

.project-static-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s-3);
    padding: var(--s-5);
}
.project-static-icon {
    display: inline-flex;
    opacity: 0.55;
}
.project-visual--paper .project-static-icon { color: var(--accent); }
.project-visual--trophy .project-static-icon { color: #C2680A; }

.project-static-badge {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}
.project-static-badge--paper { color: var(--accent); }
.project-static-badge--trophy { color: #C2680A; }

.project-static-label {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.2;
    color: var(--ink);
    font-style: normal;
}
.project-static-label em {
    display: block;
    font-style: normal;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--ink-3);
    margin-top: 6px;
    text-transform: uppercase;
}

/* ----- Image-based project visual ----------------------
   Used for papers / flowcharts where we drop in a real
   research figure. No purple gradient on image cards — we
   just show the figure on a clean white plate. Click the
   card to open the full-resolution source in a lightbox. */
.project-visual--img {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: 0 8px 24px -16px rgba(27, 22, 53, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Kill the shared .project-visual::before purple gradient on image cards. */
.project-visual--img::before { display: none; }
.project-visual--img > img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    position: relative;
    z-index: 1;
}

/* Zoom-in hint chip — small magnifier badge that appears on hover. */
.project-zoom {
    position: absolute;
    right: var(--s-3);
    bottom: var(--s-3);
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(27, 22, 53, 0.78);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--t-med) var(--ease),
                transform var(--t-med) var(--ease);
    pointer-events: none;
}
.project-visual:hover .project-zoom {
    opacity: 1;
    transform: translateY(0);
}

/* Per-project aspect-ratio overrides are intentionally removed:
   every project card now uses the base 16 / 10 (declared on
   .project-visual). Click the card to open the full source
   image / video in a lightbox. */

.project-visual-caption {
    position: absolute;
    left: var(--s-3);
    bottom: var(--s-3);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(27, 22, 53, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: 4px 10px;
    border-radius: 999px;
    pointer-events: none;
}

/* ----- Skills --------------------------------------------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s-4);
}
.skill-card {
    position: relative;
    padding: var(--s-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: transform var(--t-med) var(--ease),
                box-shadow var(--t-med) var(--ease),
                border-color var(--t-med) var(--ease);
}
.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -16px rgba(91, 79, 233, 0.2);
    border-color: var(--accent-soft);
}
.skill-num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-tint);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--s-3);
    letter-spacing: 0.05em;
}
.skill-card h3 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: var(--s-3);
    letter-spacing: -0.01em;
}
.skill-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--s-2);
}
.skill-card li {
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--ink-3);
    padding-left: var(--s-4);
    position: relative;
}
.skill-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65em;
    width: 6px;
    height: 1px;
    background: var(--accent);
}

/* ----- Contact -------------------------------------------- */
/* Slim horizontal bar — email pill + 4 link list, no fluff */
.contact-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s-5);
    padding: var(--s-7) var(--s-5);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px -28px rgba(91, 79, 233, 0.18);
}
.contact-bar-email {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--font-display);
    font-size: clamp(1.05rem, 1.8vw, 1.4rem);
    font-weight: 500;
    color: white;
    padding: var(--s-3) var(--s-6);
    border-radius: var(--radius-pill);
    background: var(--accent);
    letter-spacing: -0.01em;
    transition: transform var(--t-fast) var(--ease),
                box-shadow var(--t-fast) var(--ease);
    box-shadow: 0 6px 16px -8px rgba(91, 79, 233, 0.5);
}
.contact-bar-email:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px -8px rgba(91, 79, 233, 0.55);
}
.contact-bar-email svg {
    transition: transform var(--t-fast) var(--ease);
}
.contact-bar-email:hover svg {
    transform: translate(2px, -2px);
}

.contact-bar-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--s-5);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--ink-3);
}
.contact-bar-links a {
    color: var(--ink-3);
    transition: color var(--t-fast) var(--ease);
}
.contact-bar-links a:hover { color: var(--accent); }

/* ----- Footer --------------------------------------------- */
.site-footer {
    padding: var(--s-6) 0;
    border-top: 1px solid var(--border);
    background: var(--bg-card-soft);
    backdrop-filter: blur(8px);
    position: relative;
    z-index: 2;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    font-size: 0.85rem;
    color: var(--ink-muted);
}
.footer-left {
    display: flex;
    align-items: center;
    gap: var(--s-3);
}
.brand-mark-sm {
    width: 24px; height: 24px;
    font-size: 0.85rem;
}
.footer-right {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    flex-wrap: wrap;
}
.footer-tech {
    font-family: var(--font-mono);
    color: var(--ink-2);
    font-weight: 500;
}

/* ----- Animations (entrance) ------------------------------ */
[data-anim] {
    opacity: 1;
    transform: none;
    transition: opacity 700ms var(--ease),
                transform 700ms var(--ease);
}
/* The fade-up initial state is only applied once JS confirms IO support.
   We keep the .in-view toggle for sections lower in the page (about, experience, etc.) */
.hero [data-anim] {
    opacity: 0;
    transform: translateY(20px);
}
.hero [data-anim].in-view {
    opacity: 1;
    transform: translateY(0);
}
[data-anim][data-delay="100"] { transition-delay: 100ms; }
[data-anim][data-delay="200"] { transition-delay: 200ms; }
[data-anim][data-delay="300"] { transition-delay: 300ms; }
[data-anim][data-delay="400"] { transition-delay: 400ms; }
[data-anim][data-delay="500"] { transition-delay: 500ms; }

/* ----- Responsive ------------------------------------------ */
@media (max-width: 720px) {
    .site-header { padding: var(--s-3) var(--s-5); }
    .site-nav { display: none; }
    .nav-toggle { display: flex; }
    .site-nav.open {
        display: flex;
        position: absolute;
        top: 100%;
        right: var(--s-4);
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        flex-direction: column;
        align-items: stretch;
        padding: var(--s-2);
        box-shadow: 0 20px 40px -16px rgba(27, 22, 53, 0.2);
        min-width: 200px;
    }
    .site-nav.open .nav-link {
        text-align: left;
        border-radius: var(--radius-sm);
    }

    .hero { padding-top: 100px; }
    .hero-title-row {
        flex-direction: column;
        gap: var(--s-5);
    }
    .hero-portrait {
        order: -1;          /* portrait goes above the text on mobile */
        max-width: 240px;
        margin: 0 auto;
    }

    .about-grid,
    .project-item,
    .exp-item {
        grid-template-columns: 1fr;
        gap: var(--s-5);
    }
    .project-item:nth-child(even) {
        direction: ltr;
    }
    .skills-grid { grid-template-columns: 1fr; }
    .hero-scroll { display: none; }
    .section { padding: var(--s-8) 0; }
    .section-head { gap: var(--s-3); }
    .contact-card { padding: var(--s-7) var(--s-5); }
}

@media (max-width: 560px) {
    .hero-meta { gap: var(--s-5); }
    .hero-ctas .btn { width: 100%; justify-content: center; }
    .container { padding: 0 var(--s-4); }
    .footer-inner { flex-direction: column; text-align: center; }
    .portrait-tag { width: 56px; height: 56px; font-size: 1.5rem; }
    .portrait-sparkle-1 { font-size: 1.1rem; }
    .portrait-sparkle-2 { font-size: 0.9rem; }
}

/* Mid-size screens (720-960px): keep 2-col but shrink portrait */
@media (max-width: 960px) and (min-width: 721px) {
    .hero-inner { gap: var(--s-5); }
    .hero-portrait {
        max-width: 280px;
        width: 280px;
    }
    .hero-title { font-size: clamp(2.4rem, 5.5vw, 4.2rem); }
    .portrait-tag { width: 60px; height: 60px; font-size: 1.7rem; }
}

/* ----- Demo Modal ------------------------------------------ */
.demo-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--s-5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-med) var(--ease);
}
.demo-modal[aria-hidden="false"] {
    opacity: 1;
    pointer-events: auto;
}
.demo-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(27, 22, 53, 0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    cursor: pointer;
}
.demo-modal-content {
    position: relative;
    width: 100%;
    max-width: 980px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
    transform: translateY(20px) scale(0.98);
    transition: transform var(--t-med) var(--ease);
}
.demo-modal[aria-hidden="false"] .demo-modal-content {
    transform: translateY(0) scale(1);
}
.demo-modal-close {
    position: absolute;
    top: -52px;
    right: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    color: white;
    transition: background var(--t-fast) var(--ease),
                transform var(--t-fast) var(--ease);
    z-index: 2;
}
.demo-modal-close:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(90deg);
}
.demo-modal-video {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.5);
}
.demo-modal-video iframe,
.demo-modal-video video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}
.demo-modal-info {
    color: white;
    padding: 0 var(--s-2);
}
.demo-modal-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: var(--s-2);
    letter-spacing: -0.01em;
}
.demo-modal-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.5;
    margin-bottom: var(--s-3);
}
.demo-modal-external {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: white;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-pill);
    transition: background var(--t-fast) var(--ease);
}
.demo-modal-external:hover {
    background: rgba(255, 255, 255, 0.22);
}

/* ----- Lightbox zoom controls (image mode only) ----------- */
.demo-zoom-controls {
    position: absolute;
    right: 14px;
    bottom: 14px;
    z-index: 4;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 4px;
    background: rgba(27, 22, 53, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.demo-zoom-btn {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: white;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1.15rem;
    line-height: 1;
    font-weight: 500;
    transition: background var(--t-fast) var(--ease);
}
.demo-zoom-btn:hover { background: rgba(255, 255, 255, 0.18); }
.demo-zoom-btn:active { background: rgba(255, 255, 255, 0.28); }
.demo-zoom-level {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: white;
    min-width: 52px;
    text-align: center;
    padding: 0 4px;
    cursor: pointer;
    user-select: none;
    border-radius: 6px;
    transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.demo-zoom-level:hover { color: var(--accent-soft); background: rgba(255, 255, 255, 0.08); }

/* Demo button visual hint */
.project-link-demo {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    border-bottom: 1px solid var(--accent-soft);
    padding-bottom: 2px;
    transition: color var(--t-fast) var(--ease),
                border-color var(--t-fast) var(--ease);
}
.project-link-demo:hover {
    color: var(--accent-2);
    border-bottom-color: var(--accent-2);
}
.demo-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #EF4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
    animation: demo-pulse 1.6s ease-in-out infinite;
}
@keyframes demo-pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15); }
    50%      { box-shadow: 0 0 0 5px rgba(239, 68, 68, 0); }
}

@media (max-width: 720px) {
    .demo-modal { padding: var(--s-3); }
    .demo-modal-close { top: -46px; right: 0; }
    .demo-modal-title { font-size: 1.15rem; }
    .demo-modal-desc { font-size: 0.88rem; }
}

/* ----- Accessibility --------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-anim] { opacity: 1; transform: none; }
}

::selection {
    background: var(--accent);
    color: white;
}