/* Vikash Apps — shared stylesheet
   Layout: a left-aligned page in ink on cool paper. Each app is shown as a paper
   "specimen" in its own material (an OMR answer sheet, a pothi page, a chat thread);
   the specimens carry the colour, everything around them stays quiet. */

:root {
  /* colour */
  --paper: #F6F7FC;          /* cool answer-sheet white */
  --sheet: #FFFFFF;
  --ink: #15184A;            /* blue-black pen ink */
  --ink-soft: #50547F;
  --rule: #D6DAEC;
  --omr: #C2185B;            /* the magenta OMR sheets are printed in */
  --omr-tint: #FCE6EF;
  --marigold: #A85F00;
  --marigold-fill: #F2A516;
  --marigold-tint: #FFF0CF;
  --teal: #0A7268;
  --teal-tint: #DBF1EE;
  --azure: #1558B0;
  --azure-tint: #E3EEFC;
  --accent: var(--ink);
  --accent-tint: #E6E8F7;
  --on-accent: #FFFFFF;

  /* type */
  --font: "Anek Latin", "Anek Devanagari", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", Arial, sans-serif;
  --font-hi: "Anek Devanagari", "Anek Latin", "Noto Sans Devanagari", "Nirmala UI", Mangal, sans-serif;
  --step--1: 0.9375rem;
  --step-0: 1.0625rem;
  --step-1: 1.3125rem;
  --step-2: 1.75rem;
  --step-3: clamp(2rem, 1.4rem + 2.4vw, 2.75rem);
  --step-4: clamp(2.4rem, 1.3rem + 4.6vw, 4.25rem);

  /* space */
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --section: clamp(3rem, 7vw, 5.5rem);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0C0E2A;
    --sheet: #151840;
    --ink: #ECEEFC;
    --ink-soft: #A8ADD8;
    --rule: #2A2E63;
    --omr: #FF7DB0;
    --omr-tint: #3A1232;
    --marigold: #FFBE55;
    --marigold-fill: #F2A516;
    --marigold-tint: #33250B;
    --teal: #5AD6C6;
    --teal-tint: #0E3536;
    --azure: #8DB8FF;
    --azure-tint: #142A52;
    --accent-tint: #1F2357;
    --on-accent: #0C0E2A;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #0C0E2A;
  --sheet: #151840;
  --ink: #ECEEFC;
  --ink-soft: #A8ADD8;
  --rule: #2A2E63;
  --omr: #FF7DB0;
  --omr-tint: #3A1232;
  --marigold: #FFBE55;
  --marigold-fill: #F2A516;
  --marigold-tint: #33250B;
  --teal: #5AD6C6;
  --teal-tint: #0E3536;
  --azure: #8DB8FF;
  --azure-tint: #142A52;
  --accent-tint: #1F2357;
  --on-accent: #0C0E2A;
  color-scheme: dark;
}

/* Each app carries its own colour */
[data-app="bihar"]     { --accent: var(--omr);      --accent-tint: var(--omr-tint); }
[data-app="bhakti"]    { --accent: var(--marigold); --accent-tint: var(--marigold-tint); }
[data-app="texttales"] { --accent: var(--teal);     --accent-tint: var(--teal-tint); }
[data-app="nursing"]   { --accent: var(--azure);    --accent-tint: var(--azure-tint); }

/* ---------- base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

[lang="hi"] { font-family: var(--font-hi); }

h1, h2, h3 {
  margin: 0;
  font-weight: 700;
  font-stretch: 112%;
  line-height: 1.08;
  letter-spacing: -0.012em;
  text-wrap: balance;
}
h1 { font-size: var(--step-4); line-height: 1.02; letter-spacing: -0.02em; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }

p, ul, ol, dl, figure, fieldset { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg { max-width: 100%; }

a { color: inherit; text-decoration-line: underline; text-decoration-thickness: 0.08em; text-underline-offset: 0.2em; text-decoration-color: var(--accent); }
a:hover { text-decoration-thickness: 0.16em; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: var(--gutter); top: -4rem; background: var(--ink); color: var(--paper); padding: 0.5rem 1rem; border-radius: 999px; z-index: 10; }
.skip:focus { top: 0.75rem; }

.wrap { max-width: 72rem; margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section); }
.section + .section { padding-block-start: 0; }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.1rem; }
.measure { max-width: 40rem; }
.soft { color: var(--ink-soft); }
.small { font-size: var(--step--1); }

/* ---------- header and footer ---------- */

.site-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem 2rem; padding-block: 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: 0.65rem; font-weight: 700; font-stretch: 112%; font-size: var(--step-1); letter-spacing: -0.01em; text-decoration: none; }
.brand svg { width: 2rem; height: 2rem; flex: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.site-nav a { text-decoration: none; padding-block: 0.35rem; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { border-bottom-color: var(--accent); }

.site-foot { border-top: 1px solid var(--rule); margin-top: clamp(2.5rem, 6vw, 4rem); }
main > .section:last-child { padding-block-end: 0; }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2.5rem; padding-block: 2rem 2.5rem; color: var(--ink-soft); font-size: var(--step--1); }
.site-foot ul { display: flex; flex-wrap: wrap; gap: 0.35rem 1.5rem; }

/* ---------- buttons ---------- */

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.7rem 1.3rem;
  background: var(--accent); color: var(--on-accent);
  border: 2px solid var(--accent); border-radius: 999px;
  font-weight: 600; line-height: 1.2; text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.btn:hover { background: transparent; color: var(--accent); }
.btn svg { width: 1.05em; height: 1.05em; flex: none; }

/* ---------- home hero ---------- */

.hero { padding-block: clamp(2rem, 6vw, 4.5rem) clamp(2rem, 5vw, 3.5rem); display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
.hero h1 { max-width: 17em; }
.lede { font-size: var(--step-1); line-height: 1.5; max-width: 36rem; color: var(--ink-soft); }

/* ---------- specimens ---------- */

.desk { display: grid; grid-template-columns: 4fr 4fr 3fr; gap: clamp(1rem, 2.5vw, 2rem); align-items: start; }
.desk .specimen:nth-child(2) { margin-top: 2.5rem; }
.desk .specimen:nth-child(3) { margin-top: 1rem; }
.desk-note { margin-top: 1.25rem; }

.specimen { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.8rem; min-width: 0; }
.specimen figcaption { font-size: var(--step--1); color: var(--ink-soft); }
.specimen figcaption a { color: var(--ink); font-weight: 600; }

.sheet {
  position: relative;
  background: var(--sheet);
  border: 1px solid var(--rule);
  border-radius: 6px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 30px -22px color-mix(in srgb, var(--accent) 55%, transparent);
  padding: 1.25rem 1.25rem 1.25rem 2.5rem;
  min-width: 0;
}

/* OMR answer sheet */
.omr .sheet { border-color: var(--omr); }
.omr .sheet::before { /* timing marks down the edge */
  content: ""; position: absolute; left: 0.8rem; top: 1.1rem; bottom: 1.1rem; width: 0.55rem;
  background: repeating-linear-gradient(to bottom, var(--ink) 0 0.3rem, transparent 0.3rem 1.05rem);
}
.sheet-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.25rem 1rem; padding-bottom: 0.6rem; margin-bottom: 0.9rem; border-bottom: 1.5px solid var(--omr); color: var(--omr); font-weight: 600; font-size: var(--step--1); }
.omr fieldset { border: 0; min-width: 0; display: grid; gap: 0.45rem; }
.omr legend { padding: 0; margin-bottom: 0.7rem; font-size: var(--step-1); font-weight: 600; line-height: 1.45; }
.omr label { position: relative; display: flex; align-items: center; gap: 0.75rem; padding: 0.2rem 0; cursor: pointer; }
.omr input { position: absolute; opacity: 0; inset: 0 auto 0 0; width: 2rem; height: 100%; margin: 0; cursor: pointer; }
.bubble {
  flex: none; width: 1.9rem; height: 1.9rem; display: grid; place-items: center;
  border: 1.5px solid var(--omr); border-radius: 50%;
  color: var(--omr); font-size: 0.8125rem; font-weight: 600; line-height: 1;
  transition: background-color 0.15s ease;
}
.omr label:hover .bubble { background: var(--omr-tint); }
.omr input:checked + .bubble { background: var(--ink); border-color: var(--ink); color: var(--sheet); }
.omr input:focus-visible + .bubble { outline: 3px solid var(--omr); outline-offset: 3px; }
.omr-result { margin-top: 0.9rem; padding-top: 0.7rem; border-top: 1px dashed var(--rule); font-size: var(--step--1); color: var(--ink-soft); min-height: 2.6rem; }
.omr-result .right, .omr-result .wrong { display: none; color: var(--ink); font-weight: 600; }
.omr:has(input:checked) .omr-result .hint { display: none; }
.omr:has(input[value="b"]:checked) .omr-result .right { display: inline; }
.omr:has(input:checked:not([value="b"])) .omr-result .wrong { display: inline; }

/* Pothi page */
.pothi .sheet { background: var(--marigold-tint); border-color: color-mix(in srgb, var(--marigold-fill) 60%, transparent); padding: 1.75rem 2rem; text-align: center; }
.pothi .sheet::before, .pothi .sheet::after { /* double margin rules, as on a manuscript leaf */
  content: ""; position: absolute; top: 0; bottom: 0; width: 5px;
  border-inline: 1.5px solid var(--marigold-fill);
}
.pothi .sheet::before { left: 0.8rem; }
.pothi .sheet::after { right: 0.8rem; }
.verse { font-size: clamp(1.2rem, 1rem + 0.7vw, 1.4rem); font-weight: 600; line-height: 1.7; color: var(--ink); }
.verse-src { margin-top: 0.6rem; font-size: var(--step--1); color: var(--marigold); font-weight: 600; }
.verse-gloss { margin-top: 0.9rem; padding-top: 0.9rem; border-top: 1px solid color-mix(in srgb, var(--marigold-fill) 60%, transparent); font-size: var(--step--1); color: var(--ink-soft); line-height: 1.5; }

/* Chat thread */
.chat .sheet { padding: 1rem; display: grid; gap: 0.5rem; background: var(--teal-tint); border-color: color-mix(in srgb, var(--teal) 35%, transparent); }
.chat-who { font-size: var(--step--1); font-weight: 600; color: var(--teal); padding-bottom: 0.5rem; margin-bottom: 0.25rem; border-bottom: 1px solid color-mix(in srgb, var(--teal) 30%, transparent); }
.msg { max-width: 88%; padding: 0.5rem 0.8rem; border-radius: 1rem; line-height: 1.35; font-size: var(--step--1); }
.msg.in { justify-self: start; background: var(--sheet); border-bottom-left-radius: 0.25rem; }
.msg.out { justify-self: end; background: var(--teal); color: var(--on-accent); border-bottom-right-radius: 0.25rem; }
.typing { display: inline-flex; gap: 0.3rem; align-items: center; padding-block: 0.75rem; }
.typing i { width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--ink-soft); animation: typing 1.2s infinite ease-in-out; }
.typing i:nth-child(2) { animation-delay: 0.15s; }
.typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing { 0%, 60%, 100% { opacity: 0.35; transform: none; } 30% { opacity: 1; transform: translateY(-3px); } }

/* ---------- app list (home) ---------- */

.app { display: grid; grid-template-columns: 4fr 8fr; gap: 1.25rem clamp(1.5rem, 4vw, 3rem); padding-block: clamp(1.75rem, 4vw, 2.75rem); border-top: 1px solid var(--rule); }
.app:last-child { border-bottom: 1px solid var(--rule); }
.app-id { display: flex; gap: 1rem; align-items: flex-start; min-width: 0; }
.app-id h3 { font-size: var(--step-2); }
.app-kind { color: var(--accent); font-weight: 600; margin-top: 0.3rem; }
.app-mark { flex: none; width: 3.25rem; height: 3.25rem; display: grid; place-items: center; border-radius: 0.9rem; background: var(--accent-tint); color: var(--accent); }
.app-mark svg { width: 1.75rem; height: 1.75rem; }
.app-body { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.1rem; min-width: 0; }
.app-body > p:first-child { font-size: var(--step-1); line-height: 1.5; max-width: 38rem; }

.ticks { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 0.4rem 2rem; max-width: 44rem; }
.ticks li { position: relative; padding-left: 1.5rem; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--accent); }

/* ---------- facts (developer, privacy) ---------- */

.split { display: grid; align-items: start; grid-template-columns: 1fr 1fr; gap: 2.5rem clamp(1.5rem, 5vw, 4rem); }
.split > * { min-width: 0; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1.5rem; }
.facts dt { color: var(--ink-soft); }
.facts dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.links { display: grid; gap: 0.5rem; }

/* ---------- app pages ---------- */

.page-hero { display: grid; grid-template-columns: 7fr 5fr; gap: 2.5rem clamp(1.5rem, 5vw, 4rem); align-items: center; padding-block: clamp(2rem, 6vw, 4.5rem); }
.page-hero > * { min-width: 0; }
.page-hero h1 { font-size: var(--step-4); }
.kicker { color: var(--accent); font-weight: 600; }

.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 clamp(1.5rem, 4vw, 3rem); }
.features > div { padding-block: 1.25rem; border-top: 1px solid var(--rule); min-width: 0; }
.features dt { font-weight: 700; font-stretch: 112%; font-size: var(--step-1); }
.features dd { margin: 0.25rem 0 0; color: var(--ink-soft); }

.notice { border-left: 4px solid var(--accent); background: var(--accent-tint); padding: 1rem 1.25rem; border-radius: 0 6px 6px 0; max-width: 44rem; }

.other { display: grid; gap: 0; }
.other li { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.5rem 2rem; padding-block: 1rem; border-top: 1px solid var(--rule); }
.other li:last-child { border-bottom: 1px solid var(--rule); }
.other strong { font-size: var(--step-1); font-stretch: 112%; }
.other span { color: var(--ink-soft); flex: 1 1 18rem; }

/* ---------- documents (privacy policies) ---------- */

.doc { max-width: 44rem; padding-block: clamp(2rem, 5vw, 3.5rem) 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 1rem; }
.doc h1 { font-size: var(--step-3); }
.doc h2 { font-size: var(--step-1); margin-top: 1.5rem; line-height: 1.25; }
.doc ul { list-style: disc; padding-left: 1.4rem; display: grid; gap: 0.35rem; }
.doc ul::marker, .doc li::marker { color: var(--accent); }
.doc-meta { color: var(--ink-soft); padding-bottom: 1rem; border-bottom: 1px solid var(--rule); }
.doc a { overflow-wrap: anywhere; }

/* ---------- not found ---------- */

.lost { padding-block: clamp(3rem, 10vw, 7rem) 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; max-width: 40rem; }

/* ---------- Nursing Prep Pro additions ---------- */

.omr[data-app="nursing"] { --omr: var(--azure); --omr-tint: var(--azure-tint); }

.crumbs ol { display: flex; flex-wrap: wrap; gap: 0.2rem 0.6rem; font-size: var(--step--1); color: var(--ink-soft); }
.crumbs li + li::before { content: "/"; margin-right: 0.6rem; color: var(--ink-soft); opacity: 0.6; }
.crumbs [aria-current="page"] { color: var(--ink); font-weight: 600; }

.app-mark-large { width: 4.5rem; height: 4.5rem; border-radius: 1.2rem; }
.app-mark-large svg { width: 2.4rem; height: 2.4rem; }
.app-icon { width: 4.5rem; height: 4.5rem; border-radius: 1.2rem; }

.btn-pending, .btn-pending:hover { background: transparent; color: var(--ink-soft); border: 2px dashed var(--ink-soft); cursor: default; }

.levels { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem clamp(1.25rem, 3vw, 2.5rem); margin-top: 0.75rem; }
.levels li { position: relative; display: grid; gap: 0.3rem; align-content: start; padding-top: 1rem; border-top: 3px solid var(--accent); }
.levels li:not(:last-child)::after { /* arrowhead pointing at the next level */
  content: ""; position: absolute; top: -0.5rem; right: -0.1rem; width: 0.7rem; height: 0.7rem;
  border: solid var(--accent); border-width: 3px 3px 0 0; transform: rotate(45deg);
}
.levels strong { font-size: var(--step-1); font-stretch: 112%; }
.levels span { color: var(--ink-soft); }

.confirm { border: 1.5px dashed var(--accent); background: var(--accent-tint); padding: 0.75rem 1rem; border-radius: 6px; }
.confirm-inline { border: 1.5px dashed var(--accent); background: var(--accent-tint); padding: 0.05rem 0.5rem; border-radius: 6px; }
.doc-end { border-bottom: 0; border-top: 1px solid var(--rule); padding-top: 1rem; margin-top: 1.5rem; }

/* ---------- narrow screens ---------- */

@media (max-width: 62rem) {
  .desk { grid-template-columns: 1fr 1fr; }
  .desk .specimen:nth-child(2) { margin-top: 0; }
  .desk .specimen:nth-child(3) { margin-top: 0; grid-column: 1 / -1; max-width: 26rem; }
}

@media (max-width: 46rem) {
  .desk, .app, .split, .page-hero, .features { grid-template-columns: 1fr; }
  .desk .specimen:nth-child(3) { max-width: none; }
  .page-hero { align-items: start; }
  .levels { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .levels li { padding: 0 0 1.5rem 1.25rem; border-top: 0; border-left: 3px solid var(--accent); }
  .levels li:last-child { padding-bottom: 0; }
  .levels li:not(:last-child)::after { top: auto; right: auto; bottom: -0.1rem; left: -0.5rem; transform: rotate(135deg); }
  .facts { grid-template-columns: 1fr; gap: 0; }
  .facts dd { margin-bottom: 0.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .typing i { animation: none; opacity: 0.7; }
  .btn, .bubble { transition: none; }
}