/* ------------------------------------------------------------------
   Roni Pradhan — portfolio
   Design: "Surfaces" — a bento of miniature product UIs.
   Tokens first, then layout, then one block per card.
------------------------------------------------------------------- */

:root {
  --bg: #0F1013;
  --card: #17181C;
  --raised: #1D1F25;
  --border: #262930;
  --border-strong: #343843;
  --text: #F3F3F5;
  --muted: #9A9EA8;
  --faint: #5B606B;

  --violet: #A78BFA;
  --teal: #2DD4BF;
  --amber: #FBBF24;
  --coral: #FB7185;
  --sky: #7DD3FC;
  --lime: #BEF264;

  --sans: 'Instrument Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'DM Mono', ui-monospace, Menlo, Consolas, monospace;

  --r: 16px;
  --ri: 8px;
  --gap: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; color-scheme: dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--violet); color: #0F1013; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 clamp(16px, 3vw, 32px); }
.mono { font-family: var(--mono); font-size: 11.5px; letter-spacing: .02em; }
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }

.skip {
  position: absolute; left: -999px; top: 10px; z-index: 100;
  background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 8px; font-weight: 500; text-decoration: none;
}
.skip:focus { left: 12px; }

/* nav ---------------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(15, 16, 19, .82);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; justify-content: space-between; align-items: center; height: 54px; }
.brand { font-weight: 600; text-decoration: none; letter-spacing: -.01em; display: flex; align-items: center; gap: 9px; }
.brand i { width: 9px; height: 9px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 3px rgba(45, 212, 191, .18); }
.nav .links { display: flex; gap: 4px; }
.nav .links a { text-decoration: none; color: var(--muted); padding: 6px 10px; border-radius: 8px; font-size: 14px; }
.nav .links a:hover { color: var(--text); background: var(--card); }
.nav .links .sep { width: 1px; background: var(--border); margin: 8px 6px; }

/* hero --------------------------------------------------------------- */
.hero { padding: 72px 0 44px; }
.hero h1 { font-size: clamp(32px, 4.4vw, 56px); font-weight: 600; letter-spacing: -.025em; line-height: 1.05; margin: 14px 0 18px; max-width: 18ch; }
.hero p { color: var(--muted); font-size: 17px; line-height: 1.55; max-width: 62ch; margin: 0 0 26px; }
.hero p b { color: var(--text); font-weight: 500; }
.btns { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px;
  font: inherit; font-weight: 500; font-size: 14px; text-decoration: none; cursor: pointer;
  color: var(--text); background: transparent; border: 1px solid var(--border-strong);
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn.fill { background: var(--text); color: #0F1013; border-color: var(--text); }
.btn.fill:hover { background: #fff; transform: translateY(-1px); }
.btn.line:hover { border-color: var(--muted); background: var(--card); transform: translateY(-1px); }
.btn[data-copied="true"] { border-color: var(--teal); color: var(--teal); }

/* bento -------------------------------------------------------------- */
.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap); padding-bottom: 24px; }
.card {
  position: relative; min-width: 0; overflow: hidden;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r);
  padding: 18px 18px 16px; display: flex; flex-direction: column; gap: 12px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .02) inset, 0 6px 20px rgba(0, 0, 0, .25);
  transition: transform .2s ease, border-color .2s ease;
  opacity: 0; transform: translateY(10px);
  animation: up .6s cubic-bezier(.2, .7, .2, 1) forwards;
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .09;
  background: radial-gradient(420px 220px at 0% 0%, var(--tint, transparent) 0%, transparent 70%);
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card:focus-within { border-color: var(--border-strong); }
.card > * { position: relative; }
@keyframes up { to { opacity: 1; transform: translateY(0); } }
.card:nth-child(1) { animation-delay: .05s; } .card:nth-child(2) { animation-delay: .1s; }
.card:nth-child(3) { animation-delay: .15s; } .card:nth-child(4) { animation-delay: .2s; }
.card:nth-child(5) { animation-delay: .25s; } .card:nth-child(6) { animation-delay: .3s; }
.card:nth-child(7) { animation-delay: .35s; } .card:nth-child(8) { animation-delay: .4s; }
.card:nth-child(9) { animation-delay: .45s; } .card:nth-child(10) { animation-delay: .5s; }
.card:nth-child(11) { animation-delay: .55s; } .card:nth-child(12) { animation-delay: .6s; }
.card:nth-child(13) { animation-delay: .65s; } .card:nth-child(14) { animation-delay: .7s; }

.card .eyebrow { display: flex; align-items: center; gap: 8px; }
.card .eyebrow i { width: 6px; height: 6px; border-radius: 50%; background: var(--tint, var(--muted)); }
.card h3 { margin: 0; font-size: 17px; font-weight: 600; letter-spacing: -.01em; line-height: 1.25; }
.card .cap { margin: auto 0 0; color: var(--muted); font-size: 13.5px; line-height: 1.5; }
.card .cap b { color: var(--text); font-weight: 500; }
.card .out { display: flex; gap: 14px; flex-wrap: wrap; }
.card .out a { color: var(--text); font-size: 13.5px; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--faint); }
.card .out a:hover { text-decoration-color: var(--text); }

.ui {
  background: var(--raised); border: 1px solid var(--border); border-radius: var(--ri);
  padding: 12px; min-width: 0;
  font-family: var(--mono); font-size: 11.5px; line-height: 1.5; color: var(--muted);
}
.ui .hd { display: flex; justify-content: space-between; gap: 10px; color: var(--text); margin-bottom: 8px; }
.ui .hd span:last-child { color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-family: var(--mono); font-size: 11px; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--muted); white-space: nowrap; }
.chip.on { color: var(--text); border-color: var(--tint, var(--border-strong)); background: color-mix(in srgb, var(--tint, #fff) 10%, transparent); }
.grow { flex: 1; }

.c7 { grid-column: span 7; } .c6 { grid-column: span 6; } .c5 { grid-column: span 5; }
.c4 { grid-column: span 4; } .c3 { grid-column: span 3; }
.r2 { grid-row: span 2; }

/* a. voice interviews */
.wave { display: flex; align-items: center; justify-content: center; gap: 5px; height: 64px; margin: 10px 0; }
.wave i {
  flex: 0 0 6px; height: 100%; background: var(--teal); border-radius: 3px; opacity: .9;
  transform-origin: center; transform: scaleY(.12);
  animation: wv 1.1s ease-in-out infinite alternate;
}
@keyframes wv { from { transform: scaleY(.12); } to { transform: scaleY(var(--h, 1)); } }
.voice { display: flex; flex-direction: column; }
.voice .tr { flex: 1; }
.tr { display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; margin: 10px 0 12px; align-content: start; }
.tr b { color: var(--teal); font-weight: 500; white-space: nowrap; }
.tr span { color: var(--text); }
.sess { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; color: var(--faint); border-top: 1px dashed var(--border-strong); padding-top: 8px; margin-bottom: 10px; font-size: 10.5px; }
.live { display: inline-flex; align-items: center; gap: 6px; }
.live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--coral); animation: blink 1.3s steps(1) infinite; }
@keyframes blink { 50% { opacity: .2; } }

/* b. study-builder agent */
.dag { display: flex; flex-direction: column; margin: 4px 0; }
.node { display: flex; align-items: center; justify-content: space-between; gap: 10px; background: var(--card); border: 1px solid var(--border-strong); border-radius: 6px; padding: 5px 9px; color: var(--text); }
.node small { color: var(--muted); font-size: 10.5px; }
.node.done { border-color: var(--violet); }
.node .st { color: var(--violet); }
.edge { display: flex; align-items: center; gap: 8px; height: 20px; padding-left: 14px; color: var(--faint); font-size: 10.5px; }
.edge::before { content: ""; width: 1px; height: 100%; background: var(--violet); opacity: .7; }

/* c. cost sparkline */
.spark { width: 100%; height: auto; display: block; }
.spark .l { fill: none; stroke: var(--amber); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 600; stroke-dashoffset: 600; animation: draw 1.6s .6s ease-out forwards; }
.spark .a { fill: url(#ag); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.big { font-size: 30px; font-weight: 600; letter-spacing: -.03em; line-height: 1; color: var(--text); }
.big small { font-size: 12px; color: var(--muted); font-weight: 400; letter-spacing: 0; margin-left: 8px; font-family: var(--mono); }

/* d. migration */
.mig { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; }
.mig .repos { display: flex; flex-direction: column; gap: 6px; }
.mig .repo { border: 1px solid var(--border-strong); border-radius: 6px; padding: 4px 8px; color: var(--text); display: flex; justify-content: space-between; gap: 8px; }
.mig .repo small { color: var(--muted); }
.mig svg { width: 44px; height: 110px; display: block; }
.mig svg path { stroke: var(--teal); fill: none; stroke-width: 1.2; opacity: .8; }
.mig .rel { border: 1px solid var(--teal); background: color-mix(in srgb, var(--teal) 12%, transparent); border-radius: 999px; padding: 6px 10px; color: var(--text); text-align: center; line-height: 1.3; }
.mig .rel small { display: block; color: var(--muted); }

/* e. public api */
.code { white-space: pre; overflow: hidden; text-overflow: ellipsis; color: var(--text); margin: 0; font: inherit; }
.code .k { color: var(--sky); } .code .s { color: var(--muted); } .code .g { color: var(--lime); }
.evt { display: flex; justify-content: space-between; gap: 8px; border-top: 1px dashed var(--border-strong); margin-top: 8px; padding-top: 8px; }
.evt b { color: var(--sky); font-weight: 500; }

/* f. billing seats */
.seat { display: flex; align-items: center; gap: 8px; padding: 5px 0; border-bottom: 1px solid var(--border); }
.seat:last-of-type { border-bottom: 0; }
.seat .av { width: 18px; height: 18px; border-radius: 50%; background: var(--border-strong); flex: none; display: grid; place-items: center; font-size: 9px; color: var(--text); }
.seat .nm { color: var(--text); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.seat .role { font-size: 10.5px; padding: 1px 6px; border-radius: 999px; border: 1px solid var(--border-strong); white-space: nowrap; }
.seat .role.x { color: var(--coral); border-color: color-mix(in srgb, var(--coral) 50%, transparent); }
.bill { display: flex; justify-content: space-between; gap: 8px; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border-strong); }
.bill b { color: var(--text); font-weight: 500; }
.tog { display: inline-flex; align-items: center; gap: 6px; }
.tog i { width: 22px; height: 12px; border-radius: 999px; background: var(--coral); position: relative; display: inline-block; }
.tog i::after { content: ""; position: absolute; right: 2px; top: 2px; width: 8px; height: 8px; border-radius: 50%; background: #0F1013; }

/* g. search */
.q { display: flex; align-items: center; gap: 8px; background: var(--card); border: 1px solid var(--border-strong); border-radius: 6px; padding: 5px 9px; color: var(--text); }
.q .cur { width: 1px; height: 12px; background: var(--lime); animation: blink 1s steps(1) infinite; }
.res { display: flex; justify-content: space-between; gap: 8px; padding: 5px 0; border-bottom: 1px solid var(--border); }
.res:last-child { border-bottom: 0; }
.res span:first-child { color: var(--text); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.res .sc { color: var(--lime); }

/* h. unmoderated research */
.tabs { display: flex; gap: 4px; margin-bottom: 8px; flex-wrap: wrap; }
.tabs span { padding: 3px 7px; border-radius: 5px; border: 1px solid transparent; white-space: nowrap; }
.tabs span.on { border-color: var(--border-strong); color: var(--text); background: var(--card); }
.heat { position: relative; height: 96px; border-radius: 6px; background: var(--card); border: 1px solid var(--border); overflow: hidden; }
.heat::before {
  content: ""; position: absolute; inset: 10px; opacity: .9;
  background:
    linear-gradient(var(--border-strong), var(--border-strong)) 0 0 / 38% 8px no-repeat,
    linear-gradient(var(--border), var(--border)) 0 16px / 70% 5px no-repeat,
    linear-gradient(var(--border), var(--border)) 0 26px / 55% 5px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) 0 44px / 26% 14px no-repeat,
    linear-gradient(var(--border), var(--border)) 60% 44px / 40% 30px no-repeat;
}
.heat::after {
  content: ""; position: absolute; inset: 0; mix-blend-mode: screen;
  background:
    radial-gradient(60px 40px at 22% 62%, rgba(251, 113, 133, .85), rgba(251, 191, 36, .45) 45%, transparent 70%),
    radial-gradient(40px 30px at 74% 30%, rgba(251, 191, 36, .6), transparent 70%),
    radial-gradient(30px 22px at 48% 22%, rgba(190, 242, 100, .5), transparent 70%);
}

/* l. website task scoring */
.verdict { display: flex; align-items: center; gap: 8px; padding: 5px 0; border-bottom: 1px solid var(--border); }
.verdict:last-of-type { border-bottom: 0; }
.verdict .pid { color: var(--text); flex: none; }
.verdict .path { flex: 1; min-width: 0; color: var(--faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.verdict .v { flex: none; font-size: 10.5px; padding: 1px 7px; border-radius: 999px; border: 1px solid var(--border-strong); white-space: nowrap; }
.verdict .v.d { color: var(--lime); border-color: color-mix(in srgb, var(--lime) 45%, transparent); }
.verdict .v.i { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }
.verdict .v.f { color: var(--coral); border-color: color-mix(in srgb, var(--coral) 45%, transparent); }
.quote { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border-strong); color: var(--text); }
.quote small { display: block; margin-top: 3px; color: var(--faint); font-size: 10.5px; }

/* m. email consent */
.pref { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--border); color: var(--text); }
.pref:last-of-type { border-bottom: 0; }
.sw { width: 24px; height: 13px; border-radius: 999px; background: var(--border-strong); position: relative; flex: none; }
.sw::after { content: ""; position: absolute; top: 2px; left: 2px; width: 9px; height: 9px; border-radius: 50%; background: var(--muted); }
.sw.on { background: var(--sky); }
.sw.on::after { left: 13px; background: #0F1013; }
.lock { flex: none; font-size: 10.5px; color: var(--faint); white-space: nowrap; }
.unsub { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border-strong); color: var(--faint); text-align: center; }
.unsub u { color: var(--muted); text-underline-offset: 2px; }

/* n. invite delivery */
.batch { display: grid; grid-template-columns: 58px 1fr 32px; align-items: center; gap: 8px; padding: 3px 0; }
.batch .bar { height: 6px; border-radius: 3px; background: var(--border); overflow: hidden; }
.batch .bar i { display: block; height: 100%; width: var(--w); background: var(--lime); transform-origin: left; animation: grow .9s ease-out both; }
.batch b { color: var(--text); font-weight: 500; text-align: right; }
.batch.gap { color: var(--faint); }
.sweep { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border-strong); }
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* i. codebase archaeology */
.chat { display: flex; flex-direction: column; gap: 6px; }
.bub { background: var(--card); border: 1px solid var(--border-strong); border-radius: 10px; padding: 9px 11px; color: var(--text); max-width: 100%; }
.bub.q { align-self: flex-end; border-color: var(--border); color: var(--muted); border-radius: 10px 10px 2px 10px; }
.bub.a { border-radius: 10px 10px 10px 2px; }
.bub .cite { display: block; margin-top: 6px; color: var(--violet); font-size: 10.5px; }

/* j. year progress */
.phone { margin: 0 auto; width: min(100%, 150px); border: 1px solid var(--border-strong); border-radius: 18px; padding: 12px 10px; background: var(--card); box-shadow: 0 0 0 3px var(--raised); }
.phone .pct { color: var(--text); font-size: 20px; font-weight: 600; letter-spacing: -.02em; font-family: var(--sans); margin-bottom: 8px; }
.phone .pct small { font-family: var(--mono); color: var(--muted); font-weight: 400; font-size: 10.5px; margin-left: 6px; }
.dots { display: grid; grid-template-columns: repeat(14, 1fr); gap: 3px; }
.dots i { display: block; aspect-ratio: 1; border-radius: 50%; background: var(--border-strong); }
.dots i.on { background: var(--text); }

/* k. clock */
.clock { font-family: var(--sans); font-size: 38px; font-weight: 600; letter-spacing: -.03em; line-height: 1; color: var(--text); font-variant-numeric: tabular-nums; }
.clock small { display: block; font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: .02em; margin-top: 8px; font-weight: 400; }

/* sections below the grid ------------------------------------------- */
.plain { padding: 56px 0 8px; }
.plain h2 { font-size: 13px; font-family: var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 0 0 18px; font-weight: 500; }
.row { display: grid; grid-template-columns: 200px 1fr; gap: 20px; padding: 18px 0; border-top: 1px solid var(--border); }
.row:last-child { border-bottom: 1px solid var(--border); }
.row .when { font-family: var(--mono); font-size: 12px; color: var(--muted); padding-top: 3px; }
.row h3 { margin: 0 0 4px; font-size: 17px; font-weight: 600; letter-spacing: -.01em; }
.row h3 span { color: var(--muted); font-weight: 400; }
.row p { margin: 0 0 10px; color: var(--muted); max-width: 70ch; }
.stack { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.stack .grp { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 16px 18px; }
.stack .grp h3 { margin: 0 0 10px; font-size: 14px; font-weight: 600; }

.foot { margin-top: 64px; padding: 26px 0 40px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 13.5px; }
.foot a { text-decoration: none; color: var(--muted); }
.foot a:hover { color: var(--text); }

/* responsive --------------------------------------------------------- */
@media (max-width: 1000px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .c7, .c6, .c5, .c4, .c3 { grid-column: span 1; }
  .c7, .c6, .c5 { grid-column: span 2; }
  .r2 { grid-row: auto; }
  .row { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 640px) {
  .bento { grid-template-columns: 1fr; }
  .c7, .c6, .c5, .c4, .c3 { grid-column: span 1; }
  .stack { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 32px; }
  .nav .links a { padding: 6px 7px; }
  .nav .links .in, .nav .links .sep { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { animation: none; opacity: 1; transform: none; }
  .wave i { animation: none; height: 60%; }
  .spark .l { animation: none; stroke-dashoffset: 0; }
  .live::before, .q .cur, .batch .bar i { animation: none; }
  .card, .btn { transition: none; }
}