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

:root {
  --bg: #090c10;
  --surface: #0f1318;
  --border: #1e2630;
  --accent: #00f5c4;
  --accent2: #ff3d6b;
  --text: #e8edf2;
  --muted: #4a5568;
  --glow: rgba(0, 245, 196, 0.3);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
}

/* Animated grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,245,196,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,196,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(0,245,196,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  width: min(600px, 95vw);
  padding: 2rem;
}

/* Top navigation */
.nav {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
  margin-bottom: 2rem;
}

.nav a {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--muted);
  text-decoration: none;
  transition: all 0.2s;
}

.nav a:hover {
  color: var(--text);
  border-color: var(--muted);
}

.nav a.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0,245,196,0.06);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.content {
  margin-top: 2.5rem;
}

.content h2 { font-size: 1.2rem; letter-spacing: 0.1em; text-transform: uppercase; margin: 1.5rem 0 0.6rem; color: var(--text); }
.content h3 { font-size: 0.95rem; letter-spacing: 0.08em; text-transform: uppercase; margin: 1.2rem 0 0.4rem; color: var(--accent); opacity: 0.9; }
.content p { font-size: 0.9rem; color: #aab4c0; line-height: 1.6; margin-bottom: 0.5rem; }

.header .label {
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--accent);
  text-transform: uppercase;
  opacity: 0.8;
}

.header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text);
}

/* Generic card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

/* Clock display (shared) */
.clock-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.clock-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.clock-card.running::before { opacity: 1; }

.clock-card.running::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.time-display {
  font-family: 'Share Tech Mono', monospace;
  font-size: clamp(2.6rem, 12vw, 4.6rem);
  letter-spacing: 0.05em;
  color: var(--text);
  line-height: 1;
  text-shadow: 0 0 30px rgba(0,245,196,0);
  transition: text-shadow 0.4s, color 0.3s;
}

.clock-card.running .time-display {
  text-shadow: 0 0 40px var(--glow);
  color: #fff;
}

.ms-display {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.4rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin-top: 0.3rem;
  transition: color 0.3s;
}

.clock-card.running .ms-display { color: var(--accent); }

/* Status indicator */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.2rem;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s, box-shadow 0.3s;
}

.clock-card.running .status-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Buttons */
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.btn {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity 0.2s;
}

.btn:hover::before { opacity: 0.07; }
.btn:active { transform: scale(0.97); }

.btn-start { color: var(--accent); border-color: var(--accent); }
.btn-start:hover { background: rgba(0,245,196,0.08); box-shadow: 0 0 20px rgba(0,245,196,0.15); }

.btn-stop { color: var(--accent2); border-color: var(--accent2); }
.btn-stop:hover { background: rgba(255,61,107,0.08); box-shadow: 0 0 20px rgba(255,61,107,0.15); }

.btn-lap { color: #f0c040; border-color: #f0c040; }
.btn-lap:hover { background: rgba(240,192,64,0.08); }

.btn-reset { color: var(--muted); border-color: var(--border); }
.btn-reset:hover { color: var(--text); border-color: var(--muted); }

.btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; }

/* Form inputs */
.field-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.field-grid.two { grid-template-columns: 1fr 1fr; }
.field-grid.three { grid-template-columns: 1fr 1fr 1fr; }

.field label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.field input,
.field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  padding: 0.7rem 0.8rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 14px rgba(0,245,196,0.12);
}

.field input::-webkit-calendar-picker-indicator { filter: invert(0.7); }

/* Result block */
.result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.result .big {
  font-family: 'Share Tech Mono', monospace;
  font-size: clamp(1.6rem, 7vw, 2.6rem);
  color: var(--accent);
  text-shadow: 0 0 30px var(--glow);
  letter-spacing: 0.04em;
}

.result .sub {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.5rem;
}

.result-line {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.result-line:last-child { border-bottom: none; }
.result-line .k { color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; font-size: 0.75rem; }
.result-line .v { font-family: 'Share Tech Mono', monospace; color: var(--text); }

.hint {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  opacity: 0.5;
}

/* World clock list */
.clock-list { display: flex; flex-direction: column; gap: 0.75rem; }

.clock-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1rem 1.2rem;
  animation: fadeSlideIn 0.2s ease;
}

.clock-row .city { font-size: 0.95rem; font-weight: 700; letter-spacing: 0.08em; }
.clock-row .zone { font-size: 0.65rem; color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; }
.clock-row .ctime { font-family: 'Share Tech Mono', monospace; font-size: 1.5rem; color: var(--accent); }
.clock-row .cdate { font-size: 0.65rem; color: var(--muted); text-align: right; letter-spacing: 0.05em; }
.clock-row .rm {
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 1.1rem; padding: 0 0 0 0.6rem; transition: color 0.2s;
}
.clock-row .rm:hover { color: var(--accent2); }

/* Tabata phase colors */
.clock-card.phase-work { border-color: var(--accent2); }
.clock-card.phase-work .time-display { color: var(--accent2); text-shadow: 0 0 40px rgba(255,61,107,0.4); }
.clock-card.phase-rest { border-color: var(--accent); }
.clock-card.phase-rest .time-display { color: var(--accent); text-shadow: 0 0 40px var(--glow); }
.phase-label {
  font-size: 0.8rem; letter-spacing: 0.35em; text-transform: uppercase;
  margin-bottom: 0.5rem; color: var(--muted);
}
.clock-card.phase-work .phase-label { color: var(--accent2); }
.clock-card.phase-rest .phase-label { color: var(--accent); }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 420px) {
  .field-grid.three { grid-template-columns: 1fr; }
}