/* ═══════════════════════════════════════════════════
   CityTime — fullscreen-clock.css
   Ambient fullscreen clock: flip, digital, analog
   ═══════════════════════════════════════════════════ */

/* ── Flip clock sizing tokens ─────────────────────── */
:root {
  --fh:       clamp(90px, 23vmin, 230px);   /* card height — mobile/small */
  --fw:       calc(var(--fh) * 0.76);        /* card width */
  --ff:       calc(var(--fh) * 0.88);        /* digit font-size */
  --fd-r:     clamp(6px, 1.2vmin, 16px);     /* card corner radius */
  --fd-gap:   clamp(2px, 0.35vmin, 4px);     /* crease gap between halves */
  --flip-dur: 260ms;
}

/* Larger cards on desktop/TV — mobile sizing preserved above */
@media (min-width: 900px) {
  :root { --fh: clamp(200px, 28vmin, 380px); }
}

/* ── Full-page layout ─────────────────────────────── */
.fsc-page {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.fsc-clock-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(14px, 3vmin, 44px);
  padding: clamp(16px, 4vmin, 60px) clamp(12px, 3vw, 40px);
}

/* ════════════════════════════════════════════════════
   FLIP CLOCK
   ════════════════════════════════════════════════════ */
.fsc-flip {
  display: none;
  align-items: center;
  gap: clamp(10px, 2.5vw, 36px);
}

/* Digit pair (e.g. hours, minutes, seconds) */
.fd-group {
  display: flex;
  gap: clamp(3px, 0.6vw, 8px);
}

/* ── Single flip card ─────────────────────────────── */
.fd {
  position: relative;
  width: var(--fw);
  height: var(--fh);
  perspective: calc(var(--fh) * 4);
  border-radius: var(--fd-r);
  box-shadow:
    0 12px 32px rgba(0,0,0,.45),
    0 3px 8px  rgba(0,0,0,.3);
  flex-shrink: 0;
}

/* Static top half — always visible, shows upper portion of current digit */
.fd-top {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: calc(var(--fh) / 2);
  overflow: hidden;
  border-radius: var(--fd-r) var(--fd-r) 0 0;
  background: var(--surface-2);
  border-bottom: var(--fd-gap) solid var(--bg);
}
.fd-top::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,.045) 0%, transparent 60%);
  pointer-events: none;
  border-radius: inherit;
}

/* Static bottom half — shows lower portion of current digit */
.fd-btm {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--fh) / 2);
  overflow: hidden;
  border-radius: 0 0 var(--fd-r) var(--fd-r);
  background: var(--surface);
}
.fd-btm::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,.14) 100%);
  pointer-events: none;
  border-radius: inherit;
}

/* ── Digit text (shared across all four sub-elements) */
.fd-top .fd-txt,
.fd-btm .fd-txt,
.fd-f   .fd-txt {
  position: absolute;
  left: 0; right: 0;
  height: var(--fh);
  line-height: var(--fh);
  font-family: Arial, sans-serif;
  font-size: var(--ff);
  font-weight: 700;
  color: var(--text-pri);
  text-align: center;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  user-select: none;
  pointer-events: none;
}
/* Top card: anchor text at top → see upper half of numeral */
.fd-top .fd-txt { top: 0; }
/* Bottom card: anchor text at bottom → see lower half of numeral */
.fd-btm .fd-txt { bottom: 0; }

/* ── Animated fold elements ───────────────────────── */
.fd-f {
  position: absolute;
  left: 0; right: 0;
  overflow: hidden;
  z-index: 3;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Top fold: overlays .fd-top, folds down during animation */
.fd-f-top {
  top: 0;
  height: calc(var(--fh) / 2);
  transform-origin: center bottom;
  transform: rotateX(0deg);
  background: var(--surface-2);
  border-radius: var(--fd-r) var(--fd-r) 0 0;
  border-bottom: var(--fd-gap) solid var(--bg);
  box-shadow: 0 4px 14px rgba(0,0,0,.5);
}
.fd-f-top .fd-txt { top: 0; }

/* Bottom fold: overlays .fd-btm, starts folded away, unfolds to reveal next digit */
.fd-f-btm {
  bottom: 0;
  height: calc(var(--fh) / 2);
  transform-origin: center top;
  transform: rotateX(90deg);
  background: var(--surface);
  border-radius: 0 0 var(--fd-r) var(--fd-r);
}
.fd-f-btm .fd-txt { bottom: 0; }

/* Trigger flip animation by adding .flipping to .fd */
.fd.flipping .fd-f-top {
  transform: rotateX(-90deg);
  transition: transform var(--flip-dur) ease-in;
}
.fd.flipping .fd-f-btm {
  transform: rotateX(0deg);
  transition: transform var(--flip-dur) ease-out;
  transition-delay: calc(var(--flip-dur) * 0.55);
}

/* ── Colon separator ──────────────────────────────── */
.fd-sep {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: calc(var(--fh) * 0.14);
  width: calc(var(--fh) * 0.18);
  flex-shrink: 0;
}
.fd-dot {
  width:  calc(var(--fh) * 0.075);
  height: calc(var(--fh) * 0.075);
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

/* ── Sub-info (AM/PM, date, timezone) ─────────────── */
.fsc-sub {
  text-align: center;
  line-height: 1.7;
}
.fsc-ampm {
  font-family: var(--font-num);
  font-size: clamp(.9rem, 2.5vmin, 2rem);
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--accent);
  min-height: 1.3em; /* reserve space even when empty so layout doesn't jump */
}
.fsc-date {
  font-size: clamp(.72rem, 1.5vmin, 1rem);
  color: var(--text-sec);
}
.fsc-tz {
  font-family: var(--font-num);
  font-size: clamp(.62rem, 1.2vmin, .85rem);
  color: var(--text-muted);
  letter-spacing: .05em;
  opacity: .75;
}

/* ════════════════════════════════════════════════════
   DIGITAL MODE (scaled up)
   ════════════════════════════════════════════════════ */
.fsc-digital {
  display: none;
  align-items: baseline;
  gap: clamp(4px, 1vmin, 14px);
  font-family: 'DSEG7-Classic', monospace;
  font-weight: bold;
  color: var(--text-pri);
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
.fsc-d-hhmm {
  font-size: clamp(5rem, 24vmin, 17rem);
  line-height: 1;
}
.fsc-d-sec {
  font-size: clamp(2.5rem, 12vmin, 8.5rem);
  color: var(--accent);
  line-height: 1;
}
.fsc-d-ampm {
  font-size: clamp(1.4rem, 5.5vmin, 4.2rem);
  color: var(--text-sec);
  letter-spacing: .04em;
  line-height: 1;
}

/* ════════════════════════════════════════════════════
   ANALOG MODE (scaled up)
   ════════════════════════════════════════════════════ */
.fsc-analog {
  display: none;
  align-items: center;
  justify-content: center;
}
/* Override clock.css's small analog-svg size */
.fsc-analog .analog-svg {
  width:  min(68vmin, 520px);
  height: min(68vmin, 520px);
}

/* ── Mode visibility ──────────────────────────────── */
body.fsc-mode-flip    .fsc-flip    { display: flex; }
body.fsc-mode-digital .fsc-digital { display: flex; }
body.fsc-mode-analog  .fsc-analog  { display: flex; }

/* Hide seconds group on narrow viewports */
@media (max-width: 520px) {
  .fd-group-sec,
  .fd-sep-sec { display: none !important; }
}

/* ════════════════════════════════════════════════════
   CONTROLS CLUSTER (bottom-right, auto-hiding)
   ════════════════════════════════════════════════════ */
.fsc-controls {
  position: fixed;
  bottom: 20px; right: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  z-index: 100;
  opacity: 1;
  transition: opacity 0.5s ease;
}
.fsc-controls.auto-hidden {
  opacity: 0;
  pointer-events: none;
}

.fsc-logo-link {
  font-size: .8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: -.01em;
  padding: 2px 0;
  transition: color var(--t-fast);
}
.fsc-logo-link:hover { color: var(--accent); }

.fsc-btn-row {
  display: flex;
  gap: 4px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,.3);
}

/* Narrow text button (format toggle) */
.fsc-btn-txt {
  width: auto;
  padding: 0 10px;
  font-family: var(--font-num);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
}

/* ── Reduced motion ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .fd-f-top, .fd-f-btm { transition: none !important; }
}