/* ============================================================
   AVIRAJ VIRAPE — Portfolio
   Design system: warm-amber on near-black, Syne + DM Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Mono:wght@300;400;500&display=swap');

:root {
  /* surfaces */
  --bg:        #0a0a0a;
  --bg-2:      #0f0f0f;
  --card:      #141414;
  --card-2:    #191919;
  --border:    #242424;
  --border-2:  #303030;

  /* ink */
  --text:      #f2f2f0;
  --text-2:    #8d8d88;
  --text-3:    #565652;

  /* warm amber accent (oklch-derived, single hue family) */
  --accent:        #f2a93b;
  --accent-bright: #ffc163;
  --accent-deep:   #c9821f;
  --accent-dim:    rgba(242, 169, 59, 0.12);
  --accent-glow:   rgba(242, 169, 59, 0.32);

  --font-display: 'Syne', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --maxw: 1280px;

  /* theme-aware literals (overridden in light mode) */
  --on-accent:  #0a0a0a;   /* ink that sits ON an amber fill */
  --glass:      rgba(12,12,12,0.55);
  --glass-2:    rgba(10,10,10,0.85);
  --grid-line:  rgba(255,255,255,0.035);
  --faint-line: rgba(255,255,255,0.07);
  --shadow-ink: rgba(0,0,0,0.6);
}

/* ============================================================
   LIGHT THEME — warm paper, same amber psychology
   (deeper amber for legible accent on light surfaces)
   ============================================================ */
html[data-theme="light"] {
  --bg:        #f3efe6;
  --bg-2:      #ece7da;
  --card:      #ffffff;
  --card-2:    #f7f3ea;
  --border:    #e6e0d1;
  --border-2:  #d4cdba;

  --text:      #1c1a16;
  --text-2:    #6a6358;
  --text-3:    #9a917e;

  --accent:        #cf8418;
  --accent-bright: #e8a02e;
  --accent-deep:   #a4660d;
  --accent-dim:    rgba(207,132,24,0.12);
  --accent-glow:   rgba(207,132,24,0.30);

  --on-accent:  #fffaf0;
  --glass:      rgba(255,255,255,0.62);
  --glass-2:    rgba(250,247,240,0.88);
  --grid-line:  rgba(40,32,18,0.045);
  --faint-line: rgba(40,32,18,0.10);
  --shadow-ink: rgba(60,45,20,0.18);
}

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

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  overflow-x: hidden;
  line-height: 1.5;
}

/* hide scrollbar */
::-webkit-scrollbar { width: 0; height: 0; }
html { scrollbar-width: none; -ms-overflow-style: none; }

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

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---------- shared type utilities ---------- */
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.label .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
.label--accent { color: var(--accent); }

.accent-text { color: var(--accent); }
.dim { color: var(--text-2); }

/* section scaffolding */
section { position: relative; }
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}
.section-pad { padding-top: clamp(80px, 12vh, 150px); padding-bottom: clamp(80px, 12vh, 150px); }

.section-head { margin-bottom: 56px; }
.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin-top: 18px;
}
.section-sub {
  margin-top: 18px;
  color: var(--text-2);
  font-size: 16px;
  max-width: 540px;
  text-wrap: pretty;
}

/* ============================================================
   BACKGROUND
   ============================================================ */
.bg-layer {
  position: fixed; inset: 0; z-index: -10;
  overflow: hidden; pointer-events: none;
  --cx: 50vw; --cy: 32vh;
  --px: 0px;  --py: 0px;
  background: radial-gradient(120% 90% at 50% -10%, color-mix(in oklab, var(--bg), #fff 6%) 0%, var(--bg) 55%);
}
html[data-theme="light"] .bg-layer {
  background: radial-gradient(120% 90% at 50% -10%, #fdfbf6 0%, var(--bg) 58%);
}
.bg-aurora {
  position: absolute; inset: -8%;
  transform: translate3d(var(--px), var(--py), 0);
  transition: transform 0.2s linear;
  will-change: transform;
}
.blob {
  position: absolute; border-radius: 50%;
  filter: blur(120px);
  will-change: transform;
  animation: blobDrift 28s var(--ease) infinite;
}
.blob.b1 { top: -6%; left: 4%;   width: 460px; height: 460px; background: rgba(242,169,59,0.16); animation-duration: 26s; }
.blob.b2 { top: 10%; right: -4%; width: 360px; height: 360px; background: rgba(120,140,180,0.10); animation-duration: 32s; animation-delay: -6s; }
.blob.b3 { bottom: 2%; left: 8%; width: 480px; height: 480px; background: rgba(242,169,59,0.09); animation-duration: 36s; animation-delay: -12s; }
.blob.b4 { bottom: -8%; right: 6%; width: 400px; height: 400px; background: rgba(150,150,150,0.07); animation-duration: 30s; animation-delay: -3s; }
.blob.b5 { top: 38%; left: 44%;  width: 300px; height: 300px; background: rgba(255,193,99,0.06); animation-duration: 24s; animation-delay: -9s; }
html[data-theme="light"] .blob.b1 { background: rgba(242,169,59,0.20); }
html[data-theme="light"] .blob.b2 { background: rgba(225,150,70,0.14); }
html[data-theme="light"] .blob.b3 { background: rgba(242,169,59,0.13); }
html[data-theme="light"] .blob.b4 { background: rgba(210,170,120,0.12); }
html[data-theme="light"] .blob.b5 { background: rgba(255,193,99,0.10); }
@keyframes blobDrift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(46px, -36px) scale(1.10); }
  66%      { transform: translate(-34px, 28px) scale(0.92); }
}
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  transform: translate3d(calc(var(--px) * -0.35), calc(var(--py) * -0.35), 0);
  transition: transform 0.2s linear;
  -webkit-mask-image: radial-gradient(ellipse 92% 72% at 50% 28%, #000 28%, transparent 82%);
          mask-image: radial-gradient(ellipse 92% 72% at 50% 28%, #000 28%, transparent 82%);
}
.bg-grid-glow {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(242,169,59,0.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242,169,59,0.32) 1px, transparent 1px);
  background-size: 32px 32px;
  transform: translate3d(calc(var(--px) * -0.35), calc(var(--py) * -0.35), 0);
  -webkit-mask-image: radial-gradient(240px circle at var(--cx) var(--cy), #000 0%, rgba(0,0,0,0.5) 38%, transparent 70%);
          mask-image: radial-gradient(240px circle at var(--cx) var(--cy), #000 0%, rgba(0,0,0,0.5) 38%, transparent 70%);
}
.bg-cursor {
  position: absolute; inset: 0;
  background: radial-gradient(460px circle at var(--cx) var(--cy), rgba(242,169,59,0.11) 0%, rgba(242,169,59,0.045) 32%, transparent 62%);
}
.bg-particles {
  position: absolute; inset: 0;
  transform: translate3d(calc(var(--px) * 1.5), calc(var(--py) * 1.5), 0);
  transition: transform 0.2s linear;
}
.mote {
  position: absolute; bottom: -10px;
  width: 3px; height: 3px; border-radius: 50%;
  background: rgba(242,169,59,0.55);
  box-shadow: 0 0 7px rgba(242,169,59,0.5);
  animation: moteRise linear infinite;
}
@keyframes moteRise {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: translateY(-102vh) translateX(24px); opacity: 0; }
}
.bg-vignette {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  transform: translate3d(calc(var(--px) * -0.35), calc(var(--py) * -0.35), 0);
  transition: transform 0.2s linear;
  -webkit-mask-image: radial-gradient(ellipse 92% 72% at 50% 28%, #000 28%, transparent 82%);
          mask-image: radial-gradient(ellipse 92% 72% at 50% 28%, #000 28%, transparent 82%);
}
@media (prefers-reduced-motion: reduce) {
  .blob, .mote { animation: none !important; }
  .bg-aurora, .bg-grid, .bg-grid-glow, .bg-particles { transform: none !important; }
}

/* ============================================================
   BOOT / WELCOME OVERLAY
   ============================================================ */
.boot {
  position: fixed; inset: 0; z-index: 9999;
  background: #060606;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 26px;
  transition: transform 1.1s var(--ease);
}
html[data-theme="light"] .boot { background: #faf7f0; }
html[data-theme="light"] .boot__name { color: var(--text); }
.boot.done { transform: translateY(-101%); }
.boot__reactor {
  width: 64px; height: 64px; border-radius: 50%;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.boot__reactor::before, .boot__reactor::after {
  content: ''; position: absolute; border-radius: 50%;
  border: 1px solid var(--accent);
}
.boot__reactor::before { inset: 0; opacity: 0.4; animation: pulse 1.6s var(--ease) infinite; }
.boot__reactor::after { inset: 14px; opacity: 0.8; }
.boot__core {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow), 0 0 8px var(--accent-bright);
}
@keyframes pulse { 0%,100% { transform: scale(1); opacity: 0.4; } 50% { transform: scale(1.18); opacity: 0.1; } }

.boot__lines { text-align: center; min-height: 24px; }
.boot__line {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-2);
  opacity: 0; transform: translateY(6px);
}
.boot__line.show { animation: bootLine 0.5s var(--ease) forwards; }
@keyframes bootLine { to { opacity: 1; transform: translateY(0); } }
.boot__name {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(26px, 5vw, 44px); letter-spacing: -0.04em;
  opacity: 0; transform: translateY(20px);
}
.boot__name.show { animation: bootName 1s var(--ease) 0.1s forwards; }
@keyframes bootName { to { opacity: 1; transform: translateY(0); } }
.boot__bar {
  width: 180px; height: 2px; background: var(--border);
  border-radius: 2px; overflow: hidden;
}
.boot__bar span { display: block; height: 100%; width: 0; background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow); }

/* ============================================================
   NAVBAR
   ============================================================ */
.nav {
  position: fixed; top: 18px; left: 0; right: 0; z-index: 200;
  display: flex; justify-content: center;
  padding: 0 20px;
  opacity: 0; transform: translateY(-30px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.nav.show { opacity: 1; transform: translateY(0); }
.nav__inner {
  width: 100%; max-width: var(--maxw);
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 14px 11px 24px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--glass);
  backdrop-filter: blur(14px);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.nav.scrolled .nav__inner { background: var(--glass-2); border-color: var(--border-2); }
.nav__logo {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.12em;
  color: var(--text); display: flex; align-items: center; gap: 9px;
}
.nav__logo .av {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 7px;
  background: var(--accent); color: var(--on-accent); font-family: var(--font-display);
  font-weight: 800; font-size: 13px; letter-spacing: -0.04em;
}
.nav__links { display: flex; gap: 34px; }
.nav__link {
  position: relative; font-family: var(--font-mono); font-size: 12.5px;
  letter-spacing: 0.1em; color: var(--text-2); padding-bottom: 3px;
  transition: color 0.25s var(--ease); cursor: pointer;
}
.nav__link:hover { color: var(--text); }
.nav__link.active { color: var(--text); }
.nav__link::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 1.5px; width: 100%;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav__link.active::after { transform: scaleX(1); }
.nav__cta {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  padding: 9px 18px; border-radius: 999px;
  border: 1px solid var(--accent); color: var(--accent);
  transition: all 0.25s var(--ease); cursor: pointer; white-space: nowrap;
}
.nav__cta:hover { background: var(--accent); color: var(--on-accent); box-shadow: 0 0 20px var(--accent-glow); }

/* theme toggle */
.nav__theme {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; margin-left: 10px;
  border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border-2);
  background: var(--card);
  color: var(--accent);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease),
              background 0.25s var(--ease), transform 0.3s var(--ease);
}
.nav__theme:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 0 18px var(--accent-glow); }
.nav__theme svg { width: 18px; height: 18px; }
.nav__theme .ico-moon { display: none; }
html[data-theme="light"] .nav__theme .ico-sun { display: none; }
html[data-theme="light"] .nav__theme .ico-moon { display: block; }
.nav__burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: 0; color: inherit; }
.nav__burger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s var(--ease); }
.nav__mobile { display: none; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.04em;
  padding: 13px 22px; border-radius: 10px; cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
              box-shadow 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
  border: 1px solid transparent;
}
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--accent); color: var(--on-accent); font-weight: 500; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px -10px var(--accent-glow); background: var(--accent-bright); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }

/* mono pill chip */
.chip {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em;
  color: var(--text-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 13px; background: var(--card);
  transition: all 0.25s var(--ease);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* ============================================================
   REVEAL ANIMATION (IntersectionObserver driven)
   ============================================================ */
/* Content is VISIBLE by default. `.in` (added by observer) replays an entrance
   animation. If JS ever fails to add `.in`, content still shows — never hidden. */
.reveal { opacity: 1; }
.reveal.in { animation: revealUp 0.9s var(--ease) backwards; }
@keyframes revealUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }
.reveal[data-d="1"].in { animation-delay: 0.06s; }
.reveal[data-d="2"].in { animation-delay: 0.12s; }
.reveal[data-d="3"].in { animation-delay: 0.18s; }
.reveal[data-d="4"].in { animation-delay: 0.24s; }
.reveal[data-d="5"].in { animation-delay: 0.30s; }

/* ============================================================
   IMAGE FRAME (auto placeholder until file dropped in assets/)
   ============================================================ */
.frame {
  position: relative; overflow: hidden; border-radius: 14px;
  border: 1px solid var(--border); background: var(--card-2);
  --mx: 50%; --my: 50%;
  transform-style: preserve-3d;
  transition: transform 0.22s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
  will-change: transform;
}
.frame.is-tilt { cursor: pointer; }
.frame.is-tilt.is-active {
  box-shadow: 0 40px 80px -28px rgba(0,0,0,0.65), 0 0 0 1px rgba(255,255,255,0.05);
  border-color: var(--border-2);
}
.frame.is-tilt::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at var(--mx) var(--my), rgba(242,169,59,0.16) 0%, rgba(255,255,255,0.06) 22%, transparent 55%);
  opacity: 0; transition: opacity 0.35s var(--ease);
  pointer-events: none; border-radius: inherit;
  mix-blend-mode: screen; z-index: 2;
}
.frame.is-tilt.is-active::after { opacity: 1; }
.frame img { width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 0.6s var(--ease); }
.frame.is-tilt.is-active img { transform: scale(1.05); }
.frame.is-empty img { display: none; }
.frame__ph {
  position: absolute; inset: 0; display: none;
  align-items: center; justify-content: center; flex-direction: column; gap: 10px;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.018) 0 12px, transparent 12px 24px),
    var(--card-2);
}
.frame.is-empty .frame__ph { display: flex; }
.frame__ph .pin {
  width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--border-2);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.frame__ph span {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-3); text-align: center; padding: 0 16px;
}

/* full footer */
.foot {
  border-top: 1px solid var(--border); padding: 34px 0;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--text-3);
}

@media (max-width: 860px) {
  .wrap { padding-left: 22px; padding-right: 22px; }
  .nav__links, .nav__cta { display: none; }
  .nav__theme { margin-left: 0; margin-right: 4px; }
  .nav__burger { display: flex; }
  .nav__mobile.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 70px; left: 20px; right: 20px;
    background: rgba(10,10,10,0.95); border: 1px solid var(--border);
    border-radius: 18px; padding: 14px; backdrop-filter: blur(14px);
  }
  .nav__mobile.open a {
    font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.1em;
    color: var(--text-2); padding: 12px 14px; border-radius: 10px;
  }
  .nav__mobile.open a:active { background: var(--card); color: var(--text); }
}