/* =====================================================
   HORLOGE — design tokens
   ===================================================== */
:root {
  --hl-bg:         #0a0a0f;
  --hl-surface:    #13131a;
  --hl-border:     rgba(255,255,255,.08);
  --hl-text:       #e8e8f0;
  --hl-muted:      rgba(232,232,240,.45);
  --hl-accent:     #00e5ff;
  --hl-radius:     14px;
  --hl-shadow:     0 8px 40px rgba(0,0,0,.6);
  --hl-transition: 0.2s ease;

  /* font stacks */
  --hl-font-mono:  "Courier New", "Lucida Console", monospace;
  --hl-font-serif: "Playfair Display", Georgia, serif;
  --hl-font-sans:  "Source Sans 3", system-ui, sans-serif;

  /* active font (overridden by JS) */
  --hl-font: var(--hl-font-mono);

  /* digit size (overridden by JS) */
  --hl-digit-size: clamp(5rem, 18vw, 12rem);
  --hl-sec-size:   clamp(2.2rem, 6vw, 4.5rem);
  --hl-date-size:  clamp(1rem, 2.5vw, 1.5rem);
}

/* =====================================================
   LIGHT THEME
   ===================================================== */
[data-theme="light"] {
  --hl-bg:       #f5f5f7;
  --hl-surface:  #ffffff;
  --hl-border:   rgba(0,0,0,.1);
  --hl-text:     #1a1a2e;
  --hl-muted:    rgba(26,26,46,.45);
  --hl-shadow:   0 8px 40px rgba(0,0,0,.15);
}

/* =====================================================
   APP WRAPPER
   ===================================================== */
#horloge-app {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 120px);
  background: var(--hl-bg);
  margin: -1rem -1rem 0;
  padding: 2rem 1rem 4rem;
  position: relative;
  transition: background var(--hl-transition);
}

/* =====================================================
   CLOCK DISPLAY
   ===================================================== */
#clock-display {
  text-align: center;
  user-select: none;
}

.clock-time {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0;
  font-family: var(--hl-font);
  line-height: 1;
  color: var(--hl-accent);
  filter: drop-shadow(0 0 30px var(--hl-accent));
  transition: color var(--hl-transition), filter var(--hl-transition), font-family var(--hl-transition);
  flex-wrap: nowrap;
}

.digit {
  font-size: var(--hl-digit-size);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  min-width: 0.58em;
  display: inline-block;
  text-align: center;
}

.sep {
  font-size: var(--hl-digit-size);
  font-weight: 300;
  opacity: .5;
  padding: 0 0.04em;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: .12; }
}

.sec-block {
  display: inline-flex;
  align-items: baseline;
  margin-left: 0.15em;
  transition: opacity var(--hl-transition);
}

.sec-block .sep {
  font-size: var(--hl-sec-size);
  padding: 0 0.05em;
}

.digit--small {
  font-size: var(--hl-sec-size);
  min-width: 0.65em;
  opacity: .8;
}

.ampm {
  font-size: clamp(1.4rem, 4vw, 3rem);
  font-family: var(--hl-font);
  color: var(--hl-muted);
  margin-left: 0.4em;
  align-self: flex-start;
  margin-top: 0.3em;
}

.clock-date {
  margin-top: 1.2rem;
  font-size: var(--hl-date-size);
  font-family: var(--hl-font-sans);
  color: var(--hl-muted);
  letter-spacing: 0.06em;
  text-transform: capitalize;
  transition: opacity var(--hl-transition);
}

.clock-tz {
  margin-top: 0.4rem;
  font-size: clamp(0.75rem, 1.5vw, 1rem);
  font-family: var(--hl-font-mono);
  color: var(--hl-muted);
  opacity: .6;
  transition: opacity var(--hl-transition);
}

/* =====================================================
   ACCENT COLORS
   ===================================================== */
[data-accent="cyan"]  { --hl-accent: #00e5ff; }
[data-accent="amber"] { --hl-accent: #ffb300; }
[data-accent="lime"]  { --hl-accent: #76ff03; }
[data-accent="rose"]  { --hl-accent: #ff4081; }
[data-accent="white"] { --hl-accent: #ffffff; }

/* =====================================================
   FONT VARIANTS
   ===================================================== */
[data-font="mono"]  { --hl-font: var(--hl-font-mono);  }
[data-font="serif"] { --hl-font: var(--hl-font-serif); }
[data-font="sans"]  { --hl-font: var(--hl-font-sans);  }

/* =====================================================
   SIZE VARIANTS
   ===================================================== */
[data-size="normal"] {
  --hl-digit-size: clamp(5rem, 18vw, 12rem);
  --hl-sec-size:   clamp(2.2rem, 6vw, 4.5rem);
}
[data-size="large"] {
  --hl-digit-size: clamp(6rem, 22vw, 16rem);
  --hl-sec-size:   clamp(2.6rem, 7vw, 5.5rem);
}
[data-size="xl"] {
  --hl-digit-size: clamp(7rem, 26vw, 20rem);
  --hl-sec-size:   clamp(3rem, 8vw, 7rem);
}

/* =====================================================
   SETTINGS TOGGLE BUTTON
   ===================================================== */
.settings-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--hl-border);
  background: var(--hl-surface);
  color: var(--hl-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--hl-transition), background var(--hl-transition), transform var(--hl-transition);
  z-index: 100;
  box-shadow: var(--hl-shadow);
}
.settings-toggle:hover,
.settings-toggle:focus-visible {
  color: var(--hl-accent);
  background: var(--hl-surface);
  transform: rotate(30deg);
  outline: 2px solid var(--hl-accent);
  outline-offset: 2px;
}

/* =====================================================
   SETTINGS PANEL
   ===================================================== */
.settings-panel {
  position: fixed;
  bottom: 5rem;
  right: 1.5rem;
  width: min(320px, 92vw);
  background: var(--hl-surface);
  border: 1px solid var(--hl-border);
  border-radius: var(--hl-radius);
  box-shadow: var(--hl-shadow);
  padding: 1.5rem;
  z-index: 200;
  transition: opacity var(--hl-transition), transform var(--hl-transition);
}
.settings-panel[hidden] {
  display: none;
}

.settings-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--hl-text);
  margin: 0 0 1.2rem;
  font-family: var(--hl-font-sans);
}

.setting-group {
  margin-bottom: 1.1rem;
}

.setting-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hl-muted);
  margin-bottom: 0.5rem;
  font-family: var(--hl-font-sans);
}

/* checkbox row */
.setting-label--check {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  margin-bottom: 0;
  padding: 0.3rem 0;
}
.setting-label--check input[type="checkbox"] {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.checkmark {
  width: 38px;
  height: 22px;
  border-radius: 11px;
  background: var(--hl-border);
  position: relative;
  flex-shrink: 0;
  transition: background var(--hl-transition);
}
.checkmark::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--hl-muted);
  top: 3px;
  left: 3px;
  transition: left var(--hl-transition), background var(--hl-transition);
}
.setting-label--check input:checked + .checkmark {
  background: var(--hl-accent);
}
.setting-label--check input:checked + .checkmark::after {
  left: 19px;
  background: #fff;
}
.setting-label--check:focus-within .checkmark {
  outline: 2px solid var(--hl-accent);
  outline-offset: 2px;
}

/* toggle buttons row */
.toggle-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.opt-btn {
  flex: 1;
  min-width: 56px;
  padding: 0.4rem 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--hl-border);
  background: transparent;
  color: var(--hl-muted);
  font-size: 0.82rem;
  font-family: var(--hl-font-sans);
  cursor: pointer;
  transition: all var(--hl-transition);
}
.opt-btn[aria-pressed="true"] {
  background: var(--hl-accent);
  color: #000;
  border-color: var(--hl-accent);
  font-weight: 600;
}
.opt-btn:hover:not([aria-pressed="true"]),
.opt-btn:focus-visible {
  border-color: var(--hl-accent);
  color: var(--hl-accent);
  outline: none;
}
.opt-btn:focus-visible {
  outline: 2px solid var(--hl-accent);
  outline-offset: 2px;
}

/* color swatches */
.color-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.color-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  background: var(--c);
  cursor: pointer;
  transition: transform var(--hl-transition), border-color var(--hl-transition);
}
.color-btn:hover,
.color-btn:focus-visible {
  transform: scale(1.15);
  outline: none;
}
.color-btn[aria-pressed="true"] {
  border-color: var(--hl-text);
}
.color-btn:focus-visible {
  outline: 2px solid var(--hl-accent);
  outline-offset: 3px;
}

/* close button */
.settings-close {
  display: block;
  width: 100%;
  margin-top: 1.2rem;
  padding: 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--hl-border);
  background: transparent;
  color: var(--hl-muted);
  font-size: 0.85rem;
  font-family: var(--hl-font-sans);
  cursor: pointer;
  transition: all var(--hl-transition);
}
.settings-close:hover,
.settings-close:focus-visible {
  border-color: var(--hl-accent);
  color: var(--hl-accent);
  outline: 2px solid var(--hl-accent);
  outline-offset: 2px;
}

/* =====================================================
   HIDDEN HELPERS
   ===================================================== */
.hidden { display: none !important; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 600px) {
  #horloge-app {
    min-height: calc(100vh - 80px);
    padding-bottom: 5rem;
  }
  .settings-panel {
    bottom: 4.5rem;
    right: 0.75rem;
    width: calc(100vw - 1.5rem);
  }
}