/* ================================================================
   PRECISION TIMER — Style System
   Brutalist minimal design · Black & white · Monospace
   ================================================================ */

/* --- Custom Properties --- */
:root {
  --bg: #000;
  --fg: #fff;
  --dim: #555;
  --dimmer: #333;
  --accent-ok: #0f0;
  --accent-bad: #f44;
  --font: 'SF Mono', 'Fira Code', 'Cascadia Code', 'JetBrains Mono', 'Courier New', monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  user-select: none;
  text-transform: uppercase;
}

/* --- Grid Background --- */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--dimmer) 1px, transparent 1px),
    linear-gradient(90deg, var(--dimmer) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

/* --- App Container --- */
.app {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 540px;
  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 1.25rem 6rem;
}

/* --- Mode Navigation --- */
.mode-nav {
  display: flex;
  gap: 0;
  width: 100%;
  border: 1px solid var(--dim);
  margin-bottom: 2rem;
  flex-shrink: 0;
}

.mode-tab {
  flex: 1;
  background: transparent;
  color: var(--dim);
  border: none;
  border-right: 1px solid var(--dim);
  padding: 0.75rem 0.5rem;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.mode-tab:last-child {
  border-right: none;
}

.mode-tab:hover {
  color: var(--fg);
}

.mode-tab.active {
  background: var(--fg);
  color: var(--bg);
}

/* --- Panels --- */
.panel {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  flex: 1;
}

.panel.active {
  display: flex;
}

/* --- Main Display --- */
.main-display {
  font-size: clamp(2.8rem, 14vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  padding: 1.5rem 0;
  width: 100%;
  position: relative;
}

.ms {
  font-size: 0.38em;
  opacity: 0.5;
  vertical-align: baseline;
  display: inline-block;
  width: 4ch;
  text-align: left;
}

/* --- Sub-toggle (Duration/Target) --- */
.sub-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--dim);
  width: 100%;
  max-width: 280px;
}

.sub-btn {
  flex: 1;
  background: transparent;
  color: var(--dim);
  border: none;
  border-right: 1px solid var(--dim);
  padding: 0.5rem;
  font-family: var(--font);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.sub-btn:last-child {
  border-right: none;
}

.sub-btn.active {
  background: var(--fg);
  color: var(--bg);
}

/* --- Duration Input --- */
.duration-input {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  justify-content: center;
}

.dg {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.dg input {
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--fg);
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  width: 3.5rem;
  padding: 0.3rem;
  outline: none;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
  transition: border-color 0.2s var(--ease);
}

.dg input::-webkit-inner-spin-button,
.dg input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.dg input:focus {
  border-color: var(--fg);
}

.dg-label {
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--dim);
}

.dg-sep {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dim);
  padding: 0 0.1rem;
  align-self: center;
  margin-bottom: 1.5rem;
}

.adj {
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--dim);
  font-size: 0.6rem;
  width: 3.5rem;
  padding: 0.3rem;
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.15s var(--ease);
}

.adj:hover {
  border-color: var(--fg);
  color: var(--fg);
}

.adj:active {
  background: var(--fg);
  color: var(--bg);
}

/* --- Target Time Input --- */
.target-input {
  text-align: center;
}

.target-input input[type="time"] {
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--fg);
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  padding: 0.5rem 1rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s var(--ease);
}

.target-input input[type="time"]:focus {
  border-color: var(--fg);
}

.target-input input[type="time"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  opacity: 0.3;
  cursor: pointer;
}

/* --- Presets --- */
.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
}

.preset {
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--dim);
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: all 0.15s var(--ease);
}

.preset:hover {
  border-color: var(--fg);
  color: var(--fg);
}

.preset:active,
.preset.active {
  background: var(--fg);
  color: var(--bg);
}

/* --- Controls --- */
.controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
}

.btn {
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.9rem 2rem;
  cursor: pointer;
  border: 2px solid var(--fg);
  transition: transform 0.1s, background 0.15s var(--ease), color 0.15s var(--ease);
  min-width: 7rem;
  text-align: center;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
}

.btn-primary:hover {
  background: #ddd;
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-danger {
  background: transparent;
  color: var(--accent-bad);
  border-color: var(--accent-bad);
}

.btn-danger:hover {
  background: rgba(255, 68, 68, 0.15);
}

/* --- Stopwatch Precision Badge --- */
.sw-precision {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-align: center;
  margin-top: -1rem;
}

/* --- Lap List --- */
.lap-container {
  width: 100%;
  max-width: 400px;
  margin-top: 0.5rem;
}

.lap-header {
  display: grid;
  grid-template-columns: 3rem 1fr 1fr;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--dim);
  border-bottom: 1px solid var(--dimmer);
}

.lap-list {
  max-height: 200px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--dimmer) transparent;
}

.lap-list::-webkit-scrollbar {
  width: 4px;
}

.lap-list::-webkit-scrollbar-thumb {
  background: var(--dimmer);
}

.lap-row {
  display: grid;
  grid-template-columns: 3rem 1fr 1fr;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: opacity 0.2s;
}

.lap-row:first-child {
  background: rgba(255, 255, 255, 0.03);
}

.lap-best .lap-split {
  color: var(--accent-ok);
}

.lap-worst .lap-split {
  color: var(--accent-bad);
}

.lap-num {
  color: var(--dim);
}

/* --- Clock --- */
.clock-date {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--dim);
  text-align: center;
}

.clock-utc {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.world-clocks {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.wc-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--dimmer);
  font-variant-numeric: tabular-nums;
}

.wc-label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--dim);
  flex: 1;
}

.wc-time {
  font-size: 1rem;
  font-weight: 700;
  text-align: right;
}

.wc-remove {
  background: none;
  border: none;
  color: var(--dimmer);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0 0 0 0.75rem;
  font-family: var(--font);
  transition: color 0.15s;
}

.wc-remove:hover {
  color: var(--accent-bad);
}

/* --- Timezone Select --- */
.tz-add {
  width: 100%;
  max-width: 300px;
}

.tz-add select {
  width: 100%;
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--dim);
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  outline: none;
  appearance: none;
  text-transform: uppercase;
  transition: border-color 0.2s var(--ease);
}

.tz-add select:focus {
  border-color: var(--fg);
  color: var(--fg);
}

.tz-add select option {
  background: var(--bg);
  color: var(--fg);
}

/* --- Toolbar --- */
.toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 0.5rem 1rem;
  background: linear-gradient(transparent, var(--bg) 30%);
  padding-top: 2rem;
  z-index: 50;
}

.tool-btn {
  background: transparent;
  border: 1px solid var(--dimmer);
  color: var(--dim);
  font-family: var(--font);
  padding: 0.5rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  transition: all 0.15s var(--ease);
  min-width: 4.5rem;
}

.tool-btn:first-child {
  border-right: none;
}

.tool-btn:last-child {
  border-left: none;
}

.tool-btn:hover {
  color: var(--fg);
  border-color: var(--dim);
}

.tool-btn.active {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.08);
}

.tool-icon {
  font-size: 1rem;
}

.tool-lbl {
  font-size: 0.5rem;
  letter-spacing: 0.12em;
}

/* --- Keyboard Shortcuts Hint --- */
.kb-hint {
  position: fixed;
  bottom: 4.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  color: var(--dimmer);
  white-space: nowrap;
  z-index: 40;
  display: none;
}

kbd {
  border: 1px solid var(--dimmer);
  padding: 0.1rem 0.3rem;
  margin-right: 0.15rem;
  font-family: var(--font);
  font-size: inherit;
}

@media (hover: hover) and (pointer: fine) {
  .kb-hint {
    display: block;
  }
}

/* --- Install Banner --- */
.install-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--fg);
  z-index: 100;
  animation: slide-down 0.3s var(--ease);
}

@keyframes slide-down {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

.install-btn {
  border: 2px solid var(--bg) !important;
  padding: 0.5rem 1.5rem !important;
  font-size: 0.75rem !important;
  min-width: auto !important;
}

.install-dismiss {
  background: none;
  border: none;
  color: var(--bg);
  font-size: 1.2rem;
  cursor: pointer;
  font-family: var(--font);
  padding: 0.25rem 0.5rem;
  opacity: 0.5;
  transition: opacity 0.15s;
}

.install-dismiss:hover {
  opacity: 1;
}

/* --- Standalone (installed) tweaks --- */
@media (display-mode: standalone) {
  .install-banner {
    display: none !important;
  }
}

/* --- Utility --- */
.hidden {
  display: none !important;
}

/* --- Alarm State --- */
.alarm-active .main-display {
  animation: alarm-pulse 0.5s ease-in-out infinite;
}

.alarm-active .panel.active {
  border-color: var(--fg);
}

@keyframes alarm-pulse {
  0%, 100% { opacity: 1; text-shadow: 0 0 30px rgba(255, 255, 255, 0.6); }
  50% { opacity: 0.2; text-shadow: none; }
}

/* --- Timer Setup hide during run --- */
.timer-running .timer-setup {
  display: none;
}

/* --- Progress Bar (timer) --- */
.progress-bar {
  width: 100%;
  height: 2px;
  background: var(--dimmer);
  position: relative;
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--fg);
  transition: width 0.1s linear;
}

/* --- Responsive --- */
@media (min-width: 600px) {
  .main-display {
    font-size: 5.5rem;
  }
  .app {
    justify-content: center;
    min-height: auto;
    padding-top: 2rem;
  }
}

@media (max-width: 360px) {
  .dg input {
    font-size: 1.5rem;
    width: 2.8rem;
  }
  .dg-sep {
    font-size: 1.5rem;
  }
  .adj {
    width: 2.8rem;
  }
  .preset {
    padding: 0.3rem 0.5rem;
    font-size: 0.6rem;
  }
}

/* --- Safe area (notch devices) --- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .toolbar {
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
  }
}

/* --- Print --- */
@media print {
  .grid-bg, .toolbar, .kb-hint, .controls, .timer-setup, .tz-add {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .main-display {
    color: #000;
  }
}