/* ============================================================
   APP CHROME — shared nav, back-arrow, URL chip, bottom bar
   Replicates the iOS app's Safari-style browsing chrome.
   Used on pages that want to feel like part of the app shell.
   ============================================================ */

/* Top nav: minimal, matches homepage */
.app-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(0, 0, 0, 0.80);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
.app-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: var(--letter-tight);
}
.app-nav__brand .mark {
  width: 18px;
  height: 18px;
  background: var(--accent);
  display: inline-block;
}
.app-nav__brand .dot { color: var(--accent); }

.app-nav__cta {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  border: 1px solid var(--line-2);
  transition: border-color var(--dur-fast);
}
.app-nav__cta:hover { border-color: rgba(255,255,255,0.3); }

/* Bottom Safari-style URL chip + back arrow (from screenshots) */
.app-bottom-chrome {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 16px 24px;
  background: linear-gradient(to top, rgba(0,0,0,0.95) 60%, transparent);
  pointer-events: none;  /* only the buttons are clickable */
}
.app-bottom-chrome > * { pointer-events: auto; }

.app-chrome-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-2);
  background: rgba(20,20,22,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  font-size: 18px;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.app-chrome-btn:hover { color: var(--ink); border-color: rgba(255,255,255,0.3); }
.app-chrome-btn:disabled { color: var(--ink-4); cursor: default; }

.app-chrome-url {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  min-width: 200px;
  max-width: 320px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-2);
  background: rgba(20,20,22,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: var(--letter-tight);
}
.app-chrome-url .icon {
  width: 14px; height: 14px; opacity: 0.6;
}

/* Padding to prevent content from hiding under the bottom chrome */
.has-bottom-chrome { padding-bottom: 90px; }

/* Tour/slide card overlay (used in matrix tour, IMG_9058-9060) */
.app-tour-card {
  position: relative;
  background: rgba(10,10,10,0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line-2);
  padding: var(--sp-6) var(--sp-5) var(--sp-5);
  max-width: 560px;
  width: 100%;
}
.app-tour-card__step {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--letter-mono);
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: var(--sp-3);
}
.app-tour-card__title {
  font-family: var(--font-sans);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: var(--letter-tight);
  line-height: var(--lh-title);
  color: var(--ink);
  margin-bottom: var(--sp-3);
}
.app-tour-card__body {
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body);
  color: var(--ink-2);
  margin-bottom: var(--sp-6);
}
.app-tour-card__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}
.app-tour-card__skip {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--letter-mono);
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 8px 0;
}
.app-tour-card__continue {
  padding: 10px 20px;
  background: var(--accent);
  color: var(--ink);
  font-size: var(--fs-body-sm);
  font-weight: 600;
  letter-spacing: var(--letter-tight);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Tour progress dots */
.app-tour-dots {
  display: inline-flex;
  gap: 6px;
}
.app-tour-dot {
  width: 6px; height: 6px;
  border-radius: var(--radius-pill);
  background: var(--ink-4);
}
.app-tour-dot--active { background: var(--accent); }

/* Day timeline strip (from IMG_9058/9059/9060: DAY 1 / 7 / 30 / 90 / 385) */
.app-day-timeline {
  display: inline-flex;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  background: rgba(10,10,10,0.85);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.app-day-timeline__item {
  text-align: center;
  min-width: 52px;
  cursor: pointer;
}
.app-day-timeline__lbl {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--letter-mono);
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 4px;
}
.app-day-timeline__num {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-3);
}
.app-day-timeline__item--active .app-day-timeline__num { color: var(--accent); }
.app-day-timeline__item--active .app-day-timeline__lbl { color: var(--accent); }