/* ScanDeck — scandeck.app
   Palette and texture drawn from the app itself: paper cream, manila tabs,
   and the icon's blue — deep ink-navy accents with a blue scan beam. */

:root {
  color-scheme: light;
  --paper:       #f6f1e6;
  --paper-deep:  #efe8d7;
  --manila:      #e9dcba;
  --manila-edge: #d9c896;
  --ink:         #22241f;
  --ink-soft:    #5a5c51;
  --accent:      #2c4a87;
  --accent-deep: #1e3565;
  --accent-ink:  #131f42;
  --beam:        #4da6ff;
  --line:        rgba(34, 36, 31, 0.16);
  --line-soft:   rgba(34, 36, 31, 0.09);
  --card:        #fbf7ec;
  --card-shine:  rgba(255, 255, 255, 0.6);
  --btn-top:     #2c4a87;
  --btn-bottom:  #1e3565;
  --btn-text:    #f1f2ec;
  --grain-alpha: 0.05;

  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans:  "Spline Sans", "Avenir Next", "Helvetica Neue", sans-serif;
  --mono:  "Fragment Mono", "SF Mono", Menlo, monospace;
}

/* Dark: the same desk, after sundown — deep blue-black paper, lamplit text */
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper:       #15171d;
  --paper-deep:  #101218;
  --manila:      #322e1c;
  --manila-edge: #4e4729;
  --ink:         #ece6d4;
  --ink-soft:    #a5a494;
  --accent:      #94b2e4;
  --accent-deep: #b7cbef;
  --line:        rgba(236, 230, 212, 0.22);
  --line-soft:   rgba(236, 230, 212, 0.1);
  --card:        #1d2129;
  --card-shine:  rgba(255, 255, 255, 0.05);
  --btn-top:     #3a5ca6;
  --btn-bottom:  #2a4480;
  --grain-alpha: 0.07;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* Paper grain over everything */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: var(--grain-alpha);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--manila); color: var(--ink); }

a { color: var(--accent); }

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

.container {
  width: min(1080px, calc(100% - 3rem));
  margin: 0 auto;
}

/* ---------- Top bar ---------- */

.topbar {
  border-bottom: 1px solid var(--line-soft);
}

.topbar .container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 0;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}

.wordmark img { width: 38px; height: 38px; }

.wordmark span {
  font-family: var(--sans);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.topbar nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.topbar nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.topbar nav a:hover { color: var(--accent-deep); }

/* Light/dark toggle */
.theme-toggle {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(20deg);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

body, .topbar, .why-card, .mail-card {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: linear-gradient(180deg, var(--btn-top) 0%, var(--btn-bottom) 100%);
  color: var(--btn-text);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset,
              0 8px 20px -8px rgba(30, 53, 101, 0.55);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset,
              0 12px 24px -8px rgba(30, 53, 101, 0.6);
}

.btn-primary svg { width: 17px; height: 17px; fill: currentColor; flex: none; }

.btn-ghost {
  border: 1.5px solid var(--line);
  color: var(--ink);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent-deep); }

.btn small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  opacity: 0.8;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.btn-primary .btn-label { line-height: 1.15; text-align: left; }

/* ---------- Hero ---------- */

.hero {
  text-align: center;
  padding: 5rem 0 0;
  position: relative;
  overflow: hidden;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.kicker::before,
.kicker::after {
  content: "·";
  margin: 0 0.6em;
  color: var(--manila-edge);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 6.5vw, 4.6rem);
  font-weight: 560;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 1.1rem auto 0;
  max-width: 17ch;
}

.hero h1 em {
  font-style: italic;
  font-weight: 480;
  color: var(--accent);
}

.hero .lede {
  max-width: 56ch;
  margin: 1.4rem auto 0;
  font-size: 1.18rem;
  color: var(--ink-soft);
}

.hero .cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.2rem;
}

.hero .fine {
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

/* Staggered load-in */
.rise { opacity: 0; animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
.rise.d1 { animation-delay: 0.08s; }
.rise.d2 { animation-delay: 0.18s; }
.rise.d3 { animation-delay: 0.3s; }
.rise.d4 { animation-delay: 0.42s; }
.rise.d5 { animation-delay: 0.56s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* Hero screenshot with sweeping scan beam */
.hero-shot {
  position: relative;
  max-width: 920px;
  margin: 3.5rem auto -4px;
}

.hero-shot img {
  filter: drop-shadow(0 30px 50px rgba(33, 38, 31, 0.28));
}

.scanbeam {
  position: absolute;
  left: 2.5%;
  right: 2.5%;
  top: 0;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, transparent, var(--beam) 18%, #bfe3ff 50%, var(--beam) 82%, transparent);
  box-shadow: 0 0 14px 3px rgba(77, 166, 255, 0.55);
  opacity: 0;
  animation: sweep 7s ease-in-out 1.4s infinite;
  pointer-events: none;
}

@keyframes sweep {
  0%      { top: 6%;  opacity: 0; }
  6%      { opacity: 0.95; }
  40%     { top: 88%; opacity: 0.95; }
  46%     { opacity: 0; }
  100%    { top: 88%; opacity: 0; }
}

/* ---------- Section scaffolding ---------- */

.band {
  padding: 5.5rem 0;
}

.band + .band { border-top: 1px dashed var(--line); }

/* Manila folder tab label */
.tab {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--manila);
  border: 1px solid var(--manila-edge);
  border-bottom: none;
  padding: 0.4rem 1.2rem 0.45rem;
  clip-path: polygon(8% 0, 92% 0, 100% 100%, 0 100%);
  margin-bottom: -1px;
}

.tab-rule {
  border: none;
  border-top: 1px solid var(--manila-edge);
  margin: 0 0 2rem;
}

/* Alternating feature rows */
.feature {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.feature > * { min-width: 0; }

.feature.flip { grid-template-columns: 6fr 5fr; }
.feature.flip .feature-copy { order: 2; }
.feature.flip .feature-art  { order: 1; }

.feature h2 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 560;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0.4rem 0 1rem;
}

.feature p { color: var(--ink-soft); }
.feature p + p { margin-top: 0.9rem; }

.feature-art { position: relative; }

.feature-art img {
  filter: drop-shadow(0 18px 36px rgba(33, 38, 31, 0.22));
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.feature-art:hover img { transform: translateY(-4px) rotate(-0.4deg); }

.feature-art figcaption {
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  text-align: center;
}

.feature-art figcaption::before { content: "⌁ "; color: var(--beam); }

/* ---------- Why ScanDeck: index card ---------- */

.why { background: var(--paper-deep); }

.why-card {
  background: var(--card);
  border: 1px solid var(--manila-edge);
  border-radius: 4px;
  box-shadow: 0 24px 48px -20px rgba(0, 0, 0, 0.3),
              0 2px 0 var(--card-shine) inset;
  padding: clamp(2rem, 5vw, 3.5rem);
  transform: rotate(-0.5deg);
  position: relative;
}

.why-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed var(--manila-edge);
  border-radius: 2px;
  pointer-events: none;
}

.why-card h2 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 560;
  letter-spacing: -0.015em;
  margin-bottom: 1.6rem;
}

.why-card ul {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 2.5rem;
}

.why-card li {
  position: relative;
  padding-left: 2.1rem;
  color: var(--ink-soft);
}

.why-card li strong { color: var(--ink); font-weight: 600; }

.why-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--btn-top);
  color: var(--btn-text);
  font-size: 0.78rem;
  line-height: 1.35rem;
  text-align: center;
}

/* ---------- PaperPort rescue band (dark) ---------- */

.rescue {
  background:
    radial-gradient(120% 140% at 50% -20%, #28447e 0%, var(--accent-ink) 62%);
  color: #ece6d2;
  border-top: none !important;
}

.rescue .tab {
  background: rgba(236, 230, 210, 0.12);
  border-color: rgba(236, 230, 210, 0.25);
  color: #cbd9f1;
}

.rescue .tab-rule { border-color: rgba(236, 230, 210, 0.25); }

.rescue h2 { color: #faf6ea; }
.rescue p  { color: rgba(236, 230, 210, 0.75); }

.rescue .feature-art img {
  filter: drop-shadow(0 24px 44px rgba(0, 0, 0, 0.5));
}

.rescue figcaption { color: rgba(236, 230, 210, 0.6) !important; }

.rescue .ext {
  font-family: var(--mono);
  background: rgba(236, 230, 210, 0.14);
  border-radius: 4px;
  padding: 0.05em 0.4em;
  font-size: 0.88em;
  color: #ffe9a8;
}

/* ---------- Closing CTA ---------- */

.closer { text-align: center; }

.closer h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 560;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 22ch;
  margin: 0 auto 1.2rem;
}

.closer h2 em { font-style: italic; color: var(--accent); font-weight: 480; }

.closer p {
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 auto 2rem;
}

/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--line-soft);
  padding: 2.5rem 0 3rem;
}

footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 2rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

footer .foot-mark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-right: auto;
}

footer .foot-mark img { width: 22px; height: 22px; }

footer a { color: var(--ink-soft); text-decoration-color: var(--manila-edge); }
footer a:hover { color: var(--accent-deep); }

footer .legal {
  width: 100%;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--ink-soft);
  opacity: 0.75;
}

/* ---------- Support page ---------- */

.support-hero {
  text-align: center;
  padding: 4.5rem 0 3.5rem;
}

.support-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 560;
  letter-spacing: -0.02em;
}

.support-hero p {
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 1rem auto 0;
}

.mail-card {
  max-width: 620px;
  margin: 2.5rem auto 0;
  background: var(--card);
  border: 1px solid var(--manila-edge);
  border-radius: 4px;
  box-shadow: 0 24px 48px -20px rgba(33, 38, 31, 0.3);
  padding: 2.5rem 2rem;
  transform: rotate(0.4deg);
  position: relative;
}

.mail-card::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px dashed var(--manila-edge);
  border-radius: 2px;
  pointer-events: none;
}

.mail-card .stamp {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.mail-card a.addr {
  display: inline-block;
  margin-top: 0.6rem;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  font-weight: 560;
  color: var(--ink);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.mail-card a.addr:hover { color: var(--accent-deep); }

.mail-card .note {
  margin-top: 1rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.faq {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 5rem;
}

.faq h2 {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 560;
  margin: 3.5rem 0 0.5rem;
  text-align: center;
}

.faq details {
  border-bottom: 1px dashed var(--line);
  padding: 1.1rem 0.2rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.02rem;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::before {
  content: "+";
  font-family: var(--mono);
  color: var(--accent);
  flex: none;
  transition: transform 0.2s ease;
}

.faq details[open] summary::before { content: "–"; }

.faq details p {
  margin: 0.7rem 0 0.2rem 1.7rem;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ---------- Legal / prose pages ---------- */

.prose {
  max-width: 680px;
  margin: 0 auto;
  padding-bottom: 5rem;
}

.prose .dateline {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  text-align: center;
  margin-top: 0.5rem;
}

.prose h2 {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 560;
  letter-spacing: -0.01em;
  margin: 2.6rem 0 0.7rem;
  padding-top: 2.2rem;
  border-top: 1px dashed var(--line);
}

.prose p { color: var(--ink-soft); }
.prose p + p { margin-top: 0.9rem; }
.prose strong { color: var(--ink); }

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1),
              transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.on { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .rise, .reveal { opacity: 1; animation: none; transform: none; transition: none; }
  .scanbeam { display: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */

@media (max-width: 800px) {
  .feature, .feature.flip { grid-template-columns: 1fr; }
  .feature.flip .feature-copy { order: 1; }
  .feature.flip .feature-art  { order: 2; }
  .why-card ul { grid-template-columns: 1fr; }
  .topbar nav { gap: 1rem; }
  .band { padding: 4rem 0; }
}

@media (max-width: 480px) {
  .container { width: calc(100% - 2rem); }
  .topbar .container { flex-wrap: wrap; gap: 0.5rem; }
  .topbar nav { gap: 0.85rem; }
  .topbar nav a { font-size: 0.88rem; }
  .wordmark img { width: 30px; height: 30px; }
  .wordmark span { font-size: 1.15rem; }
  .hero { padding-top: 3.5rem; }
  .hero .fine { padding: 0 1rem; }
}