/* ============================================================
   MusicVault Desktop — marketing landing page
   Concept: the page IS a card catalogue for a vault. Dark "vault"
   sections (exterior) alternate with warm "index card" sections
   (interior/catalogue) — every structural label reads like a real
   catalogue field, because the product's actual job is cataloguing.
   ============================================================ */

:root {
  /* Color — named */
  --ink: #14181a;           /* vault interior, primary dark surface */
  --ink-raised: #1b2123;    /* slightly-lifted panel on ink */
  --teal: #2f8f7c;          /* brand accent, sourced from the real app */
  --teal-bright: #45b39b;   /* hover / active state */
  --card: #f3eee1;          /* index-card parchment surface */
  --card-raised: #fbf8f0;   /* lifted card-on-card */
  --card-ink: #201c14;      /* text on parchment */
  --ash: #9caba7;           /* muted text on ink */
  --ash-dim: #7b8985;       /* de-emphasized text on ink — still ≥4.5:1 */
  --hairline: #2b3234;      /* dividers on ink */
  --hairline-card: #ddd4bd; /* dividers on card */
  --danger-ink: #7a4a2c;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --font-body: "Inter", -apple-system, "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  --radius: 3px;
  --wrap: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--ash);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* -------------------- eyebrow / catalogue-field label -------------------- */

.field-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.field-label--on-ink { color: var(--teal-bright); }
.field-label--on-card { color: #81682c; }

/* -------------------- header -------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(20, 24, 26, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: #f4f1e8;
  border-radius: 3px;
}

.brand:focus-visible {
  outline: 2px solid var(--teal-bright);
  outline-offset: 4px;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.brand-word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav a {
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--ash);
  transition: color 0.15s ease;
  border-radius: 3px;
}

.site-nav a:hover,
.site-nav a:focus-visible { color: var(--teal-bright); }

.site-nav a:focus-visible {
  outline: 2px solid var(--teal-bright);
  outline-offset: 4px;
}

.nav-links {
  display: flex;
  gap: var(--space-3);
}

@media (max-width: 720px) {
  .nav-links { display: none; }
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--teal-bright);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--teal);
  color: #08110f;
}
.btn--primary:hover { background: var(--teal-bright); transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  border-color: var(--hairline);
  color: #e9e4d6;
}
.btn--ghost:hover { border-color: var(--teal-bright); color: var(--teal-bright); }

.btn--disabled {
  background: var(--ink-raised);
  color: var(--ash-dim);
  border-color: var(--hairline);
  cursor: not-allowed;
  position: relative;
}
.btn--disabled:hover { transform: none; }

.btn-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ash-dim);
  letter-spacing: 0.03em;
}

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

.hero {
  padding: var(--space-6) 0 var(--space-5);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(47, 143, 124, 0.16), transparent 60%),
    repeating-linear-gradient(180deg, rgba(255,255,255,0.018) 0px, rgba(255,255,255,0.018) 1px, transparent 1px, transparent 44px);
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-5);
  align-items: center;
}

@media (max-width: 960px) {
  .hero .wrap { grid-template-columns: 1fr; }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  margin-bottom: var(--space-3);
}

.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--teal-bright);
  box-shadow: 0 0 0 3px rgba(69,179,155,0.18);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: #f7f4ea;
  margin: 0 0 var(--space-3);
}

.hero h1 em {
  font-style: italic;
  color: var(--teal-bright);
}

.hero-sub {
  font-size: 1.08rem;
  max-width: 46ch;
  color: #c4cbc8;
  margin: 0 0 var(--space-2);
}

.hero-support {
  font-size: 0.92rem;
  max-width: 50ch;
  color: var(--ash-dim);
  margin: 0 0 var(--space-4);
}

.hero-ctas {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.hero-trust {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ash-dim);
  letter-spacing: 0.02em;
}

/* -------------------- catalogue-card app mockup -------------------- */

.card-stage {
  position: relative;
  perspective: 1400px;
}

.catalogue-card {
  background: var(--card);
  color: var(--card-ink);
  border-radius: var(--radius);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.55), 0 2px 0 rgba(0,0,0,0.06);
  transform: rotate(1.6deg);
  overflow: hidden;
  opacity: 0;
  animation: card-settle 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.15s forwards;
}

@keyframes card-settle {
  from { opacity: 0; transform: rotate(6deg) translateY(26px) scale(0.98); }
  to   { opacity: 1; transform: rotate(1.6deg) translateY(0) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .catalogue-card { animation: none; opacity: 1; transform: rotate(1.6deg); }
}

.punch-hole {
  position: absolute;
  top: 18px; left: 18px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.04) inset;
  z-index: 3;
}

.mock-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.9rem 0.55rem 2.4rem;
  border-bottom: 1px solid var(--hairline-card);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: #81682c;
  text-transform: uppercase;
}

.mock-titlebar .trial {
  background: rgba(47,143,124,0.14);
  color: #1e6e5d;
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
}

.mock-body {
  display: grid;
  grid-template-columns: 118px 1fr;
  min-height: 300px;
}

.mock-nav {
  border-right: 1px solid var(--hairline-card);
  padding: 0.8rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.mock-nav .item {
  padding: 0.4rem 0.5rem;
  border-radius: 3px;
  color: #5c5644;
  margin-bottom: 0.15rem;
}

.mock-nav .item.active {
  background: rgba(47,143,124,0.15);
  color: #1e6e5d;
  font-weight: 600;
}

.mock-main { padding: 1rem 1.1rem; }

.mock-main h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0 0 0.15rem;
}

.mock-main .scan-status {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: #1e6e5d;
  background: rgba(47,143,124,0.13);
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  margin-bottom: 0.9rem;
}

.mock-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem 0.6rem;
  margin-bottom: 1rem;
}

@media (max-width: 420px) {
  .mock-stats { grid-template-columns: repeat(2, 1fr); }
}

.mock-stats .stat b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--card-ink);
}
.mock-stats .stat span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: #726b54;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mock-player {
  border-top: 1px solid var(--hairline-card);
  padding-top: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: #5c5644;
}

.mock-player .transport {
  display: flex; gap: 0.35rem; align-items: center;
}
.mock-player .transport span {
  width: 20px; height: 20px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--hairline-card);
}
.mock-player .transport span.play {
  background: var(--teal);
  border-color: var(--teal);
  color: #08110f;
}

.card-tag {
  position: absolute;
  bottom: -14px;
  right: 26px;
  background: var(--ink);
  border: 1px solid var(--hairline);
  color: var(--ash);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.6rem;
  border-radius: 2px;
  transform: rotate(-2deg);
}

/* -------------------- section shells -------------------- */

section { padding: var(--space-6) 0; }

.section--ink { background: var(--ink); }
.section--card {
  background: var(--card);
  color: var(--card-ink);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0.6rem;
}

.section--ink .section-head h2 { color: #f7f4ea; }
.section--card .section-head h2 { color: var(--card-ink); }

.section-head p {
  margin: 0;
  max-width: 56ch;
  font-size: 1rem;
}

.section--ink .section-head p { color: var(--ash); }
.section--card .section-head p { color: #4d4735; }

/* -------------------- features: catalogue drawer -------------------- */

.drawer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--hairline-card);
  border: 1px solid var(--hairline-card);
}

@media (max-width: 760px) {
  .drawer-grid { grid-template-columns: 1fr; }
}

.drawer-entry {
  background: var(--card-raised);
  padding: var(--space-4);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Content is visible by default (no FOIC risk if JS is slow, blocked, or
   errors). Only entries JS has actively taken over get hidden first. */
.drawer-entry.js-reveal { opacity: 0; transform: translateY(14px); }
.drawer-entry.js-reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .drawer-entry.js-reveal { opacity: 1; transform: none; }
}

.drawer-entry .field-row {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
}

.drawer-entry .field-row .index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: #726b54;
}

.drawer-entry h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0;
  color: var(--card-ink);
}

.drawer-entry ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.drawer-entry li {
  font-size: 0.92rem;
  color: #4d4735;
  padding-left: 1.1rem;
  position: relative;
}

.drawer-entry li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: #1e6e5d;
}

.drawer-entry li strong { color: var(--card-ink); }

/* -------------------- trust / seal: a ledger, not icon cards -------------------- */

.ledger {
  border-top: 1px solid var(--hairline);
}

.ledger-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--hairline);
}

@media (max-width: 640px) {
  .ledger-row { grid-template-columns: 1fr; gap: 0.4rem; }
}

.ledger-mark {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-bright);
  padding-top: 0.15rem;
}

.ledger-body h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  color: #f4f1e8;
  margin: 0 0 0.3rem;
}

.ledger-body p {
  font-size: 0.9rem;
  color: var(--ash);
  margin: 0;
  max-width: 62ch;
}

/* -------------------- FAQ -------------------- */

.faq-list {
  border-top: 1px solid var(--hairline-card);
}

.faq-item {
  border-bottom: 1px solid var(--hairline-card);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.15rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--card-ink);
}

.faq-item summary:focus-visible {
  outline: 2px solid #1e6e5d;
  outline-offset: 4px;
}

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

.faq-item summary .chev {
  font-family: var(--font-mono);
  color: #81682c;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] summary .chev { transform: rotate(45deg); }

.faq-item .faq-a {
  padding: 0 0 1.25rem 0;
  max-width: 62ch;
  font-size: 0.94rem;
  color: #4d4735;
}

.faq-item .faq-a a { color: #1e6e5d; text-decoration: underline; }

/* -------------------- final CTA -------------------- */

.cta-band {
  background: var(--ink);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  text-align: center;
  padding: var(--space-6) 0;
}

.cta-band .field-label { display: block; margin-bottom: var(--space-2); }

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: #f7f4ea;
  margin: 0 0 var(--space-3);
}

.cta-band .hero-ctas { justify-content: center; margin-bottom: var(--space-2); }

/* -------------------- footer -------------------- */

footer {
  padding: var(--space-4) 0;
  background: var(--ink);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ash-dim);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #c4cbc8;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.footer-brand img { width: 24px; height: 24px; border-radius: 5px; }

.footer-links { display: flex; gap: var(--space-3); }
.footer-links a { text-decoration: none; color: var(--ash-dim); }
.footer-links a:hover { color: var(--teal-bright); }