/* ============================================================
   style.css — thesouravburman.github.io
   Author: Sourav Burman | AI & Computer Vision Developer
============================================================ */

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

:root {
  --bg:          #080808;
  --bg-2:        #0d0d0d;
  --gold:        #C9A84C;
  --gold-light:  #E8C97A;
  --gold-dim:    rgba(201,168,76,.12);
  --blue:        #3B82F6;
  --blue-bright: #60A5FA;
  --white:       #F5F5F0;
  --white-dim:   rgba(245,245,240,.55);
  --border:      rgba(201,168,76,.16);

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  cursor: none;
}

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

/* ── GRAIN ──────────────────────────────────────────────── */
.grain-overlay {
  position: fixed; inset: 0; z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px;
  opacity: 0.026;
  mix-blend-mode: overlay;
}

/* ── CURSOR ─────────────────────────────────────────────── */
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0;
  border-radius: 50%; pointer-events: none;
  z-index: 10000; transform: translate(-50%, -50%);
}
.cursor-dot {
  width: 6px; height: 6px;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold), 0 0 20px rgba(201,168,76,.5);
  transition: width .2s, height .2s;
}
.cursor-ring {
  width: 36px; height: 36px;
  border: 1px solid rgba(201,168,76,.45);
  transition: width .25s, height .25s, border-color .25s, background .25s;
}
.cursor-ring.hovering {
  width: 54px; height: 54px;
  border-color: var(--gold);
  background: rgba(201,168,76,.05);
}

/* ── SHARED ─────────────────────────────────────────────── */
.scene { position: relative; width: 100%; overflow: hidden; }

.section-label {
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .25em;
  color: var(--gold); margin-bottom: 1rem; opacity: .8;
}
.section-header {
  max-width: 860px; margin: 0 auto 3.5rem; text-align: center;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.5vw, 4.5rem);
  font-weight: 300; letter-spacing: -.01em; line-height: 1.1;
}
.section-title em { font-style: italic; color: var(--gold-light); }

/* ══════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════ */
.scene--hero {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 0; background: #060606;
}
#binaryRain {
  position: absolute; inset: 0;
  width: 100%; height: 100%; opacity: .32; z-index: 0;
}
.hero-glow {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 55vw; height: 55vw;
  background: radial-gradient(ellipse, rgba(201,168,76,.065) 0%, transparent 70%);
  pointer-events: none; z-index: 1;
}
.hero-content {
  position: relative; z-index: 2;
  text-align: center; padding: 0 1.5rem;
}
.hero-eyebrow {
  font-family: var(--font-mono); font-size: .7rem;
  letter-spacing: .28em; color: var(--gold); opacity: 0;
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; margin-bottom: 1.8rem;
}
.eyebrow-line {
  display: inline-block; width: 2.5rem; height: 1px;
  background: linear-gradient(to right, transparent, var(--gold));
}
.eyebrow-line:last-child { background: linear-gradient(to left, transparent, var(--gold)); }

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9.5vw, 8.5rem);
  font-weight: 300; letter-spacing: -.02em; line-height: 1;
  margin-bottom: 1.6rem;
}
.hero-name .letter {
  display: inline-block; opacity: 0;
  transform: translateY(55px) rotate(4deg);
}
.hero-name .space { display: inline-block; width: .32em; }

.hero-sub {
  font-size: clamp(.95rem, 2vw, 1.25rem);
  font-weight: 300; color: var(--white-dim);
  letter-spacing: .04em; margin-bottom: 2rem; min-height: 2rem;
}
.blink-cursor {
  display: inline-block; color: var(--gold);
  animation: blink 1.1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-meta {
  display: flex; align-items: center; justify-content: center;
  gap: .75rem; font-size: .78rem; letter-spacing: .14em;
  color: rgba(245,245,240,.32); font-family: var(--font-mono); opacity: 0;
}
.hero-meta .sep, .site-footer .sep { color: var(--gold); opacity: .45; }

.scroll-indicator {
  position: absolute; bottom: 2.2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  gap: .5rem; z-index: 3; opacity: 0;
}
.scroll-track {
  width: 1px; height: 44px;
  background: rgba(201,168,76,.18); overflow: hidden;
}
.scroll-thumb {
  width: 100%; height: 40%;
  background: var(--gold);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%   { transform: translateY(-100%); opacity: 0; }
  30%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { transform: translateY(250%); opacity: 0; }
}
.scroll-label {
  font-family: var(--font-mono); font-size: .58rem;
  letter-spacing: .28em; color: rgba(201,168,76,.38);
}

/* ══════════════════════════════════════════════════════════
   ABOUT
══════════════════════════════════════════════════════════ */
.scene--about { padding: 8rem 5vw; background: var(--bg); }

.about-wrap {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 5rem; align-items: start;
}
.code-card {
  background: #0b0b0b; border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 0 50px rgba(201,168,76,.05), 0 20px 40px rgba(0,0,0,.55);
  position: sticky; top: 5rem;
}
.code-topbar {
  display: flex; align-items: center; gap: .45rem;
  padding: .7rem 1rem; background: #111;
  border-bottom: 1px solid var(--border);
}
.code-dot { width: 10px; height: 10px; border-radius: 50%; }
.code-dot.r { background: #FF5F57; }
.code-dot.y { background: #FFBD2E; }
.code-dot.g { background: #28CA41; }
.code-filename {
  font-family: var(--font-mono); font-size: .68rem;
  color: rgba(245,245,240,.28); margin-left: .4rem; letter-spacing: .05em;
}
.code-body {
  padding: 1.4rem 1.4rem 1.8rem;
  font-family: var(--font-mono); font-size: .8rem;
  line-height: 1.9; color: #c9d1d9; overflow-x: auto;
}
.kw  { color: #ff79c6; }
.cn  { color: #8be9fd; }
.fn  { color: #50fa7b; }
.st  { color: #f1fa8c; }
.op  { color: rgba(245,245,240,.45); }

.about-sentence {
  font-size: clamp(.95rem, 1.5vw, 1.1rem);
  font-weight: 300; color: var(--white-dim);
  line-height: 1.85; margin-bottom: 1.4rem;
  opacity: 0; transform: translateY(22px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
.about-sentence.visible { opacity: 1; transform: none; }
.about-sentence strong { color: var(--white); font-weight: 400; }

.about-stats {
  display: flex; gap: 2.5rem;
  margin-top: 2.5rem; padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stat-num {
  display: block; font-family: var(--font-display);
  font-size: 2.8rem; font-weight: 300;
  color: var(--gold-light); line-height: 1; margin-bottom: .3rem;
}
.stat-lbl {
  font-size: .68rem; letter-spacing: .12em;
  color: rgba(245,245,240,.32); font-family: var(--font-mono);
}

/* ══════════════════════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════════════════════ */
.scene--projects { padding: 8rem 5vw; background: var(--bg-2); }

.projects-grid {
  max-width: 1160px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem;
}
.project-card {
  background: #0e0e0e; border: 1px solid var(--border);
  border-radius: 14px; padding: 2.2rem;
  position: relative; overflow: hidden; cursor: none;
  transition: border-color .4s, box-shadow .4s, transform .4s var(--ease-out);
  opacity: 0; transform: translateY(36px);
}
.project-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at top left, rgba(201,168,76,.04), transparent 70%);
  opacity: 0; transition: opacity .4s;
  pointer-events: none;
}
.project-card:hover {
  border-color: rgba(201,168,76,.55);
  box-shadow: 0 0 36px rgba(201,168,76,.10), 0 20px 50px rgba(0,0,0,.5);
  transform: translateY(-5px) !important;
}
.project-card:hover::before { opacity: 1; }

.project-num {
  font-family: var(--font-mono); font-size: .65rem;
  color: var(--gold); opacity: .45; letter-spacing: .2em; margin-bottom: 1.2rem;
}
.project-name {
  font-family: var(--font-display); font-size: 1.6rem;
  font-weight: 400; color: var(--white); margin-bottom: .65rem;
}
.project-brief {
  font-size: .88rem; color: var(--white-dim);
  line-height: 1.7; margin-bottom: .85rem;
}
.project-detail {
  font-size: .83rem; color: rgba(245,245,240,.33);
  line-height: 1.7; max-height: 0; overflow: hidden;
  transition: max-height .5s var(--ease-out), opacity .4s; opacity: 0;
}
.project-card:hover .project-detail {
  max-height: 110px; opacity: 1; margin-bottom: .9rem;
}
.pill-row { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.3rem; }
.pill {
  font-family: var(--font-mono); font-size: .62rem;
  letter-spacing: .1em; padding: .28rem .7rem;
  border: 1px solid var(--border); border-radius: 20px;
  color: rgba(245,245,240,.45); background: rgba(255,255,255,.02);
  transition: border-color .3s, color .3s;
}
.project-card:hover .pill {
  border-color: rgba(201,168,76,.3); color: rgba(245,245,240,.65);
}
.project-links {
  display: flex; gap: 1.4rem; align-items: center;
  position: relative; z-index: 10; pointer-events: all;
}
.proj-link {
  font-family: var(--font-mono); font-size: .7rem;
  letter-spacing: .1em; color: var(--white-dim);
  transition: color .3s;
  position: relative; z-index: 10;
  pointer-events: all; cursor: pointer;
}
.proj-link:hover { color: var(--white); }
.proj-link.gold { color: var(--gold-light); }
.proj-link.gold:hover { color: var(--white); }

/* ══════════════════════════════════════════════════════════
   TIMELINE
══════════════════════════════════════════════════════════ */
.scene--journey { padding: 8rem 5vw; background: var(--bg); }

.timeline { max-width: 680px; margin: 0 auto; position: relative; }
.timeline-rail {
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 1px; background: rgba(201,168,76,.1);
}
.timeline-fill {
  width: 100%; height: 0%;
  background: linear-gradient(to bottom, var(--gold), var(--gold-light));
  box-shadow: 0 0 8px rgba(201,168,76,.45);
}
.timeline-nodes {
  padding-left: 2.4rem;
  display: flex; flex-direction: column; gap: 2.8rem;
}
.tl-node {
  display: grid; grid-template-columns: auto 1fr;
  gap: 1.4rem; align-items: start;
  opacity: 0; transform: translateX(-18px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.tl-node.visible { opacity: 1; transform: none; }
.tl-dot {
  width: 10px; height: 10px;
  background: var(--bg); border: 2px solid var(--gold); border-radius: 50%;
  margin-top: .4rem; margin-left: -2.9rem; z-index: 2; flex-shrink: 0;
  transition: background .4s, box-shadow .4s;
}
.tl-node.visible .tl-dot {
  background: var(--gold); box-shadow: 0 0 10px rgba(201,168,76,.55);
}
.tl-dot--pulse::after {
  content: ''; position: absolute; inset: -6px;
  border: 1px solid rgba(201,168,76,.38); border-radius: 50%;
  animation: pulse 2.2s ease-out infinite;
}
@keyframes pulse {
  0%   { transform: scale(1); opacity: .55; }
  100% { transform: scale(2.4); opacity: 0; }
}
.tl-content { padding-left: .4rem; }
.tl-year {
  font-family: var(--font-mono); font-size: .65rem;
  color: var(--gold); letter-spacing: .2em; margin-bottom: .3rem; opacity: .7;
}
.tl-title {
  font-family: var(--font-display); font-size: 1.25rem;
  font-weight: 400; color: var(--white); margin-bottom: .4rem;
}
.tl-desc {
  font-size: .85rem; color: var(--white-dim); line-height: 1.75;
}

/* ══════════════════════════════════════════════════════════
   SKILLS BENTO
══════════════════════════════════════════════════════════ */
.scene--skills { padding: 8rem 5vw; background: var(--bg-2); }

.bento-grid {
  max-width: 980px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 150px; gap: .9rem;
}
.bento {
  background: #0d0d0d; border: 1px solid var(--border);
  border-radius: 14px; padding: 1.4rem;
  display: flex; flex-direction: column; justify-content: flex-end;
  position: relative; overflow: hidden;
  opacity: 0; transform: scale(.96) translateY(18px);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out),
              border-color .3s, box-shadow .3s;
}
.bento:hover {
  border-color: rgba(201,168,76,.45);
  box-shadow: 0 0 26px rgba(201,168,76,.07);
}
.bento.visible { opacity: 1; transform: none; }
.bento--hero {
  grid-row: span 2;
  background: linear-gradient(135deg, #0d0d0d, #100f08);
  border-color: rgba(201,168,76,.3);
}
.bento--wide { grid-column: span 2; }
.bento--tall { grid-row: span 2; }

.bento-glyph { font-size: 1.5rem; margin-bottom: auto; opacity: .55; line-height: 1; }
.bento--hero .bento-glyph { font-size: 2.2rem; color: var(--gold); opacity: .75; }
.bento-name {
  font-family: var(--font-display); font-size: 1.15rem;
  font-weight: 400; color: var(--white); margin-bottom: .18rem;
}
.bento--hero .bento-name { font-size: 1.5rem; }
.bento-sub {
  font-size: .68rem; color: rgba(245,245,240,.32);
  font-family: var(--font-mono); letter-spacing: .06em;
}
.bento-bar {
  width: 100%; height: 2px;
  background: rgba(255,255,255,.06); border-radius: 2px;
  margin-top: .9rem; overflow: hidden;
}
.bento-fill {
  height: 100%; width: var(--pct);
  background: linear-gradient(to right, var(--gold), var(--gold-light));
  border-radius: 2px; transform: scaleX(0); transform-origin: left;
  transition: transform 1.2s var(--ease-out);
}
.bento.visible .bento-fill { transform: scaleX(1); }
.bento-badge {
  position: absolute; top: 1rem; right: 1rem;
  font-family: var(--font-mono); font-size: .56rem;
  letter-spacing: .1em; padding: .22rem .55rem;
  border: 1px solid rgba(201,168,76,.3); border-radius: 20px;
  color: var(--gold); background: rgba(201,168,76,.05);
}
.bento-badge.samsung {
  border-color: rgba(59,130,246,.3); color: var(--blue-bright);
  background: rgba(59,130,246,.05);
}

/* ══════════════════════════════════════════════════════════
   CONTACT
══════════════════════════════════════════════════════════ */
.scene--contact {
  padding: 9rem 5vw 0; background: var(--bg);
  display: flex; flex-direction: column; align-items: center;
}
.contact-inner {
  max-width: 660px; width: 100%;
  text-align: center; padding-bottom: 6rem;
}
.contact-headline {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 7.5vw, 6.5rem);
  font-weight: 300; line-height: 1.05;
  margin-bottom: 1.6rem;
  opacity: 0; transform: translateY(28px);
}
.contact-headline em { color: var(--gold-light); font-style: italic; }
.contact-headline.visible {
  opacity: 1; transform: none;
  transition: opacity .9s var(--ease-out), transform .9s var(--ease-out);
}
.contact-sub {
  font-size: .97rem; color: var(--white-dim);
  margin-bottom: 2.5rem; opacity: 0; transform: translateY(18px);
}
.contact-sub.visible {
  opacity: 1; transform: none;
  transition: opacity .9s .14s var(--ease-out), transform .9s .14s var(--ease-out);
}
.email-link {
  display: inline-block; font-family: var(--font-mono);
  font-size: clamp(.82rem, 1.4vw, 1rem);
  color: var(--gold-light); letter-spacing: .04em;
  border-bottom: 1px solid rgba(201,168,76,.28);
  padding-bottom: .25rem; margin-bottom: 3rem;
  opacity: 0; transform: translateY(18px);
  transition: color .3s, border-color .3s;
}
.email-link:hover { color: var(--white); border-color: var(--white); }
.email-link.visible {
  opacity: 1; transform: none;
  transition: opacity .9s .28s var(--ease-out), transform .9s .28s var(--ease-out),
              color .3s, border-color .3s;
}
.social-row {
  display: flex; gap: .85rem; justify-content: center;
  flex-wrap: wrap; opacity: 0; transform: translateY(18px);
}
.social-row.visible {
  opacity: 1; transform: none;
  transition: opacity .9s .42s var(--ease-out), transform .9s .42s var(--ease-out);
}
.social-btn {
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border: 1px solid var(--border); border-radius: 50%;
  color: rgba(245,245,240,.4);
  transition: color .3s, border-color .3s, box-shadow .3s, transform .3s var(--ease-out);
}
.social-btn:hover {
  color: var(--gold-light); border-color: var(--gold);
  box-shadow: 0 0 18px rgba(201,168,76,.18);
  transform: translateY(-4px) !important;
}

/* FOOTER */
.site-footer {
  width: 100%; text-align: center;
  padding: 2.2rem 0;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: .65rem;
  letter-spacing: .14em; color: rgba(245,245,240,.18);
  display: flex; align-items: center; justify-content: center; gap: .7rem;
}
.site-footer strong { color: rgba(201,168,76,.45); font-weight: 400; }

/* PROGRESS BAR */
#progressBar {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(to right, #C9A84C, #E8C97A);
  z-index: 10001; pointer-events: none;
  box-shadow: 0 0 8px rgba(201,168,76,.55);
  transition: width .08s linear;
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-wrap { grid-template-columns: 1fr; gap: 2.5rem; }
  .code-card { position: static; }
  .projects-grid { grid-template-columns: 1fr; }
  .bento-grid { grid-template-columns: repeat(2,1fr); grid-auto-rows: 135px; }
  .bento--hero { grid-column: span 2; }
  .bento--wide { grid-column: span 2; }
  .bento--tall { grid-row: span 1; }
}
@media (max-width: 560px) {
  .bento-grid { grid-template-columns: 1fr; }
  .bento--hero,.bento--wide,.bento--tall { grid-column:span 1; grid-row:span 1; }
  .about-stats { flex-direction: column; gap: 1.2rem; }
  .hero-name { font-size: clamp(2.6rem,13vw,4.5rem); }
  .scene--about,.scene--projects,.scene--journey,
  .scene--skills,.scene--contact { padding-top: 5rem; padding-bottom: 5rem; }
}

/* ── REDUCED MOTION ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration:.01ms !important; transition-duration:.01ms !important; }
  .cursor-dot,.cursor-ring { display: none; }
  body { cursor: auto; }
  .about-sentence,.tl-node,.bento,.project-card,
  .contact-headline,.contact-sub,.email-link,.social-row { opacity:1 !important; transform:none !important; }
}