/* ==========================================================================
   Lantern — Components
   Reusable UI: buttons, badges, cards, section headers, nav, footer,
   phone frames, carousel, note/disclaimer callouts, prose.
   ========================================================================== */

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  --_bg: var(--teal-800);
  --_fg: #fff;
  --_bd: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: var(--step-0);
  line-height: 1;
  padding: 0.85em 1.5em;
  border: 1px solid var(--_bd);
  border-radius: var(--radius-pill);
  background: var(--_bg);
  color: var(--_fg);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
}

.btn:hover {
  color: var(--_fg);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active { transform: translateY(0); }

.btn--primary {
  --_bg: var(--teal-800);
  --_fg: #fff;
}
.btn--primary:hover { --_bg: var(--teal-700); }

.btn--amber {
  --_bg: var(--amber-500);
  --_fg: var(--ink);
  background: linear-gradient(180deg, var(--amber-400), var(--amber-500));
  box-shadow: var(--shadow-amber);
  font-weight: var(--weight-bold);
}
.btn--amber:hover {
  --_bg: var(--amber-400);
  background: linear-gradient(180deg, #ffc06a, var(--amber-400));
}

.btn--secondary {
  --_bg: transparent;
  --_fg: var(--teal-800);
  --_bd: var(--hairline);
}
.btn--secondary:hover {
  --_bg: var(--surface);
  --_fg: var(--teal-700);
}

.btn--ghost {
  --_bg: transparent;
  --_fg: var(--teal-700);
  --_bd: transparent;
  padding-inline: 0.6em;
}
.btn--ghost:hover { --_bg: transparent; box-shadow: none; }

.btn--on-ink {
  --_bg: rgba(255, 255, 255, 0.1);
  --_fg: #fff;
  --_bd: rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(6px);
}
.btn--on-ink:hover { --_bg: rgba(255, 255, 255, 0.18); }

.btn--lg { font-size: var(--step-1); padding: 0.95em 1.8em; }
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

/* ---- Badges / pills ----------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-display);
  font-size: var(--step--1);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  padding: 0.4em 0.85em;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--ink-soft);
  border: 1px solid var(--hairline);
}

.badge--amber {
  background: var(--note-bg);
  color: var(--amber-ink);
  border-color: var(--note-border);
}

.badge--experimental { text-transform: none; }
.badge__dot {
  width: 0.5em; height: 0.5em; border-radius: 50%;
  background: var(--amber-500);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--step--1);
  font-weight: var(--weight-bold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-ink);
}

/* ---- Section header ----------------------------------------------------- */
.section-header {
  max-width: 44rem;
  margin-inline: auto;
  text-align: center;
  display: grid;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}
.section-header--left {
  margin-inline: 0;
  text-align: left;
}
.section-header p {
  color: var(--ink-soft);
  font-size: var(--step-1);
  line-height: var(--leading-snug);
}

/* ---- Cards -------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
  height: 100%;
}

a.card,
.card--link { text-decoration: none; color: inherit; }

a.card:hover,
.card--interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--amber-300);
  text-decoration: none;
}

.card__icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--note-bg);
  color: var(--amber-ink);
  margin-bottom: var(--space-2xs);
}
.card__icon svg { width: 1.5rem; height: 1.5rem; }

.card h3 { font-size: var(--step-1); }
.card p { color: var(--ink-soft); font-size: var(--step-0); }

.card__cue {
  margin-top: auto;
  padding-top: var(--space-sm);
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  color: var(--teal-700);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}
.card__cue::after {
  content: '→';
  transition: transform var(--dur-fast) var(--ease-out);
}
a.card:hover .card__cue::after { transform: translateX(3px); }

/* ---- Grid helpers ------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-lg);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }

/* ---- Note / disclaimer callout ----------------------------------------- */
.note {
  display: flex;
  gap: var(--space-md);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  color: #5c451a;
}
.note__icon {
  flex: none;
  width: 1.5rem; height: 1.5rem;
  color: var(--amber-ink);
  margin-top: 0.15rem;
}
.note strong { color: #4a3712; }
.note p { font-size: var(--step-0); line-height: var(--leading-snug); }
.note--tight { padding: var(--space-md) var(--space-lg); }

/* ---- Navigation --------------------------------------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(251, 250, 247, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
}
.site-nav[data-scrolled='true'] {
  border-bottom-color: var(--hairline);
  background: rgba(251, 250, 247, 0.94);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: var(--step-1);
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand:hover { color: var(--ink); text-decoration: none; }
.brand__mark { width: 1.9rem; height: 1.9rem; flex: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.5vw, 1.5rem);
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-links a {
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  font-size: var(--step-0);
  color: var(--ink-soft);
  padding: 0.4rem 0.2rem;
  border-radius: var(--radius-sm);
}
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a[aria-current='page'] {
  color: var(--ink);
  font-weight: var(--weight-semibold);
}

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

.nav-toggle {
  display: none;
  width: 2.75rem; height: 2.75rem;
  align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: '';
  display: block;
  width: 1.15rem; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; top: -6px; }
.nav-toggle__bars::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 60rem) {
  .nav-toggle { display: inline-flex; }
  .nav-menu {
    position: fixed;
    inset: 4.25rem 0 auto 0;
    background: var(--paper);
    border-bottom: 1px solid var(--hairline);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-md) var(--gutter) var(--space-xl);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-base) var(--ease-out),
      transform var(--dur-base) var(--ease-out);
  }
  .nav-menu[data-open='true'] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-links li { border-bottom: 1px solid var(--hairline); }
  .nav-links a { display: block; padding: 0.9rem 0.2rem; font-size: var(--step-1); }
  .nav-menu .nav-actions {
    margin-top: var(--space-lg);
    flex-direction: column;
    align-items: stretch;
  }
  .nav-menu .btn { width: 100%; }
}

@media (min-width: 60.01rem) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
  }
}

/* ---- Footer ------------------------------------------------------------- */
.site-footer {
  background: var(--teal-900);
  color: #c3d1d4;
  padding-block: var(--space-3xl) var(--space-xl);
}
.site-footer a { color: #d9e4e5; }
.site-footer a:hover { color: #fff; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-2xl) var(--space-xl);
}
@media (max-width: 52rem) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 32rem) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand .brand { color: #fff; }
.footer-brand p {
  margin-top: var(--space-md);
  color: #a7b8bb;
  font-size: var(--step-0);
  max-width: 30ch;
}
.footer-col h4 {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #8fa4a7;
  margin-bottom: var(--space-md);
}
.footer-col ul { list-style: none; padding: 0; display: grid; gap: 0.6rem; }
.footer-col a { font-size: var(--step-0); }

.footer-legal {
  margin-top: var(--space-3xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: space-between;
  align-items: center;
  color: #8fa4a7;
  font-size: var(--step--1);
}

/* ---- Phone frame + carousel -------------------------------------------- */
.phone {
  --_w: 15.5rem;
  width: var(--_w);
  aspect-ratio: 9 / 19.5;
  background:
    linear-gradient(145deg, #33434d 0%, #1c2c34 42%, #0d1a20 100%);
  border-radius: 2.7rem;
  padding: 0.5rem;
  box-shadow:
    var(--shadow-xl),
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    inset 0 0 0 3px rgba(0, 0, 0, 0.35);
  position: relative;
  isolation: isolate;
}
.phone::before { /* Dynamic-Island pill */
  content: '';
  position: absolute;
  top: 0.95rem; left: 50%; transform: translateX(-50%);
  width: 30%; height: 1.05rem;
  background: #05090b;
  border-radius: var(--radius-pill);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
  z-index: 3;
}
.phone__screen {
  width: 100%; height: 100%;
  border-radius: 2.25rem;
  overflow: hidden;
  background: var(--surface);
  position: relative;
}
.phone__screen img,
.phone__screen svg {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top center;   /* keep the app header, crop the safe bottom */
}
.phone__screen::after { /* soft glass glare */
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(133deg, rgba(255,255,255,0.16) 0%, rgba(255,255,255,0) 26%);
  pointer-events: none;
  z-index: 2;
}

.carousel { position: relative; }
.carousel__viewport {
  display: flex;
  gap: clamp(1rem, 4vw, 2.5rem);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: var(--space-md) var(--space-md) var(--space-xl);
  margin-inline: calc(-1 * var(--space-md));
  scrollbar-width: none;
}
.carousel__viewport::-webkit-scrollbar { display: none; }

.carousel__slide {
  scroll-snap-align: center;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
  transition: opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
}
.carousel__slide[aria-hidden='true'] { opacity: 0.5; }
.carousel__caption {
  max-width: 15.5rem;
}
.carousel__caption strong {
  display: block;
  font-family: var(--font-display);
  color: var(--ink);
}
.carousel__caption span {
  font-size: var(--step--1);
  color: var(--ink-faint);
}

.carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}
.carousel__dots { display: flex; gap: 0.5rem; }
.carousel__dot {
  width: 0.55rem; height: 0.55rem;
  border-radius: 50%;
  border: none;
  background: var(--hairline);
  cursor: pointer;
  padding: 0;
  transition: background var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}
.carousel__dot[aria-selected='true'] {
  background: var(--amber-500);
  transform: scale(1.25);
}
.carousel__btn {
  width: 2.75rem; height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--hairline);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: var(--shadow-sm);
  transition: background var(--dur-fast) var(--ease-out);
}
.carousel__btn:hover { background: var(--surface-2); }
.carousel__btn svg { width: 1.1rem; height: 1.1rem; }

/* ---- Prose (Markdown-injected content) --------------------------------- */
.prose {
  max-width: var(--container-narrow);
  font-size: var(--step-0);
  color: var(--ink);
}
.prose > * + * { margin-top: 1.15em; }
.prose h2 {
  font-size: var(--step-3);
  margin-top: 2em;
  padding-top: 0.4em;
}
.prose h3 { font-size: var(--step-1); margin-top: 1.6em; }
.prose p, .prose li { color: var(--ink-soft); line-height: var(--leading-normal); }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose a { font-weight: var(--weight-medium); }
.prose blockquote { margin-block: 1.5em; }

/* ---- Feature / value row ----------------------------------------------- */
.feature {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 52rem) {
  .feature { grid-template-columns: 1fr 1fr; }
  .feature--reverse .feature__media { order: -1; }
}
.feature__body { display: grid; gap: var(--space-md); align-content: center; }
.feature__body h3 { font-size: var(--step-3); }
.feature__body p { color: var(--ink-soft); font-size: var(--step-1); line-height: var(--leading-snug); }
.feature__media {
  display: grid;
  place-items: center;
  padding: var(--space-xl);
  background: var(--surface-2);
  border-radius: var(--radius-xl);
  min-height: 18rem;
}

/* ---- Checklist ---------------------------------------------------------- */
.checklist { list-style: none; padding: 0; display: grid; gap: var(--space-sm); }
.checklist li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  color: var(--ink-soft);
}
.checklist li::before {
  content: '';
  flex: none;
  width: 1.4rem; height: 1.4rem;
  margin-top: 0.1rem;
  border-radius: 50%;
  background:
    var(--note-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a5a10' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E")
    center / 0.85rem no-repeat;
  border: 1px solid var(--note-border);
}

/* ---- Reveal-on-scroll --------------------------------------------------- */
/* Visible by default so the page is fully usable with JS disabled. The hidden
   start-state is only applied once JS has flagged <html class="js">. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---- Prose blockquote callout + tables (assembled content) ------------- */
.prose blockquote {
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--amber-500, #e08a2b);
  background: var(--surface-2, rgba(224,138,43,0.06));
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--ink);
}
.prose blockquote p { color: var(--ink); }
.prose blockquote > * + * { margin-top: 0.6em; }
.table-wrap { overflow-x: auto; margin-block: 1.5em; -webkit-overflow-scrolling: touch; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step--1);
  min-width: 34rem;
}
.prose th, .prose td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.prose thead th {
  color: var(--ink);
  font-weight: var(--weight-bold, 700);
  border-bottom: 2px solid var(--hairline);
}
.prose tbody td { color: var(--ink-soft); }