/* ===================================
   Dr. Vinayaka Jyothi — Personal Site
   Editorial dark theme with
   circuit-inspired accents
   =================================== */

:root {
    --bg: #080808;
    --bg-surface: #0f0f0f;
    --bg-elevated: #171717;
    --text-primary: #ece7df;
    --text-secondary: #9a9490;
    --text-tertiary: #5a5754;
    --accent: #e63b2e;
    --accent-dim: rgba(230, 59, 46, 0.12);
    --teal: #2bb5a0;
    --teal-dim: rgba(43, 181, 160, 0.1);
    --gold: #c9a84c;
    --border: rgba(255, 255, 255, 0.06);
    --border-strong: rgba(255, 255, 255, 0.1);
    --font-display: 'Syne', sans-serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

/* Grain overlay */
.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.035;
    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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 200px;
}

/* ======== NAVIGATION ======== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 3rem;
    mix-blend-mode: difference;
}

.nav-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
    color: #fff;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #fff;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.5;
}

/* ======== HERO ======== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding: 0 3rem 6rem;
    overflow: hidden;
}

#hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.25;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
}

.hero-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.label-sep {
    width: 24px;
    height: 1px;
    background: var(--text-tertiary);
}

.hero-name {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(3.5rem, 10vw, 9rem);
    line-height: 0.9;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.hero-line {
    display: block;
    overflow: hidden;
}

.hero-line--indent {
    padding-left: clamp(2rem, 6vw, 6rem);
    color: var(--accent);
}

.hero-sub {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 480px;
}

.hero-scroll {
    position: absolute;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.hero-scroll span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-tertiary);
}

.hero-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ======== MARQUEE ======== */

.marquee {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    overflow: hidden;
    white-space: nowrap;
}

.marquee-track {
    display: inline-flex;
    align-items: center;
    gap: 2rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-tertiary);
    animation: marquee 40s linear infinite;
}

.marquee-dot {
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ======== SECTIONS ======== */

.section {
    padding: 8rem 3rem;
    position: relative;
}

.section--dark {
    background: var(--bg-surface);
}

.section-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.section-number {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-tertiary);
}

.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 4rem;
}

/* ======== STORY ======== */

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 6rem;
}

.story-headline {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    position: sticky;
    top: 6rem;
}

.story-body {
    grid-column: 2;
}

.story-body p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.75;
}

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

.story-aside {
    grid-column: 1 / -1;
    margin-top: 2rem;
}

.pullquote {
    position: relative;
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    line-height: 1.5;
    color: var(--text-primary);
    max-width: 700px;
    padding-left: 3rem;
    border-left: 2px solid var(--accent);
}

.pullquote-mark {
    position: absolute;
    left: -0.25rem;
    top: -1.5rem;
    font-family: var(--font-display);
    font-size: 5rem;
    color: var(--accent);
    opacity: 0.2;
    line-height: 1;
    font-style: normal;
}

/* Stats */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.stat-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}

/* ======== EDUCATION ======== */

.edu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.edu-item {
    display: flex;
    flex-direction: column;
    padding: 2.5rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    transition: border-color 0.4s;
}

.edu-item:hover {
    border-color: var(--border-strong);
}

.edu-degree {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 2rem;
    color: var(--accent);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.edu-field {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.edu-school {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex-grow: 1;
}

.edu-year {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-tertiary);
    letter-spacing: 0.1em;
    margin-top: 1.5rem;
}

/* ======== PUBLICATIONS ======== */

.pub-list {
    display: flex;
    flex-direction: column;
}

.pub {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 2rem;
    align-items: start;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}

.pub:first-child {
    border-top: 1px solid var(--border);
}

.pub:hover {
    background: var(--bg-surface);
}

.pub--highlight {
    background: var(--accent-dim);
}

.pub--highlight:hover {
    background: rgba(230, 59, 46, 0.08);
}

.pub-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.05em;
    padding-top: 0.15rem;
}

.pub-title {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.45;
    margin-bottom: 0.5rem;
}

.pub-venue {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-tertiary);
    letter-spacing: 0.03em;
    margin-bottom: 0.35rem;
}

.pub-authors {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pub-authors strong {
    color: var(--text-primary);
}

.pub-type {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-tertiary);
    padding-top: 0.3rem;
    white-space: nowrap;
}

.pub-badge {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.25rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 2px;
}

/* Patent */
.patent-block {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    margin-top: 4rem;
    padding: 2rem;
    background: var(--teal-dim);
    border: 1px solid rgba(43, 181, 160, 0.15);
    border-radius: 2px;
}

.patent-icon {
    color: var(--teal);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.patent-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--teal);
    margin-bottom: 0.5rem;
}

.patent-body h3 {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.patent-body p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ======== VENTURES ======== */

.ventures-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.venture-card {
    padding: 2.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    transition: border-color 0.4s, transform 0.4s var(--ease-out-expo);
}

.venture-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-4px);
}

.venture-role {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 1rem;
}

.venture-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.venture-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.venture-desc strong {
    color: var(--text-primary);
}

.venture-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.venture-tech span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 2px;
}

/* ======== OPEN SOURCE ======== */

.repos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.repo-card {
    display: flex;
    flex-direction: column;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    transition: border-color 0.4s, transform 0.4s var(--ease-out-expo);
}

.repo-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.repo-lang {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--teal);
    margin-bottom: 0.75rem;
}

.repo-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
    margin-bottom: 0.75rem;
}

.repo-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 1rem;
}

.repo-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.repo-stars {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--gold);
}

.repo-stars svg {
    color: var(--gold);
}

.github-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    transition: color 0.3s, border-color 0.3s;
}

.github-cta:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ======== FOOTER ======== */

.footer {
    padding: 6rem 3rem 3rem;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.footer-headline {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.03em;
    margin-bottom: 3rem;
}

.footer-links {
    display: flex;
    gap: 0;
    margin-bottom: 4rem;
}

.footer-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    border: 1px solid var(--border);
    border-right: none;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    flex: 1;
    transition: background 0.3s, color 0.3s;
}

.footer-link:last-child {
    border-right: 1px solid var(--border);
}

.footer-link:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

.footer-link svg {
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.3s, transform 0.3s;
}

.footer-link:hover svg {
    opacity: 1;
    transform: translateX(0);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
}

/* ======== REVEAL ANIMATIONS ======== */

[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children in grids */
.stats-row [data-reveal]:nth-child(2) { transition-delay: 0.08s; }
.stats-row [data-reveal]:nth-child(3) { transition-delay: 0.16s; }
.stats-row [data-reveal]:nth-child(4) { transition-delay: 0.24s; }

.edu-grid [data-reveal]:nth-child(2) { transition-delay: 0.1s; }
.edu-grid [data-reveal]:nth-child(3) { transition-delay: 0.2s; }

/* ======== KEYFRAMES ======== */

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.7); }
    50% { opacity: 1; transform: scaleY(1); }
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ======== REDUCED MOTION ======== */

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

/* ======== RESPONSIVE ======== */

@media (max-width: 1024px) {
    .story-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .story-body { grid-column: 1; }
    .story-aside { grid-column: 1; }
    .story-headline { position: static; }
    .ventures-grid { grid-template-columns: 1fr 1fr; }
    .repos-grid { grid-template-columns: 1fr 1fr; }
    .edu-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav { padding: 1.25rem 1.5rem; }
    .nav-links { gap: 1.5rem; }
    .hero { padding: 0 1.5rem 4rem; }
    .hero-label { flex-wrap: wrap; gap: 0.5rem; }
    .label-sep { display: none; }
    .hero-scroll { display: none; }
    .section { padding: 5rem 1.5rem; }
    .stats-row { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .edu-grid { grid-template-columns: 1fr; }
    .pub { grid-template-columns: 60px 1fr; }
    .pub-type { display: none; }
    .ventures-grid { grid-template-columns: 1fr; }
    .repos-grid { grid-template-columns: 1fr; }
    .footer { padding: 4rem 1.5rem 2rem; }
    .footer-links { flex-direction: column; }
    .footer-link { border-right: 1px solid var(--border) !important; border-bottom: none; }
    .footer-link:last-child { border-bottom: 1px solid var(--border); }
}

@media (max-width: 480px) {
    .nav-links { gap: 1rem; }
    .nav-links a { font-size: 0.65rem; }
    .section { padding: 3.5rem 1rem; }
    .hero { padding: 0 1rem 3rem; }
    .stats-row { grid-template-columns: 1fr 1fr; }
    .venture-card { padding: 1.75rem; }
    .repo-card { padding: 1.5rem; }
    .edu-item { padding: 1.75rem; }
}