/* styles.css - enhanced for analog + slider + responsive + themes */
:root {
  /* Dark Theme (Default) */
  --bg-grad-start: #0f172a;
  --bg-grad-end: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #34d399; /* Emerald 400 */
  --accent-hover: #10b981;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.05);
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --container: 1100px;
  --danger: #ef4444;

  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  color-scheme: dark;
}

[data-theme="light"] {
  /* Light Theme */
  --bg-grad-start: #f8fafc;
  --bg-grad-end: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #10b981; /* Emerald 500 */
  --accent-hover: #059669;
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(0, 0, 0, 0.05);
  --glass: rgba(0, 0, 0, 0.03);
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

  color-scheme: light;
}

* { box-sizing: border-box; transition: background-color 0.3s, border-color 0.3s, color 0.3s; }
html, body { height: 100%; }

body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg-grad-start) 0%, var(--bg-grad-end) 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 48px;
}

.container { max-width: var(--container); margin: 0 auto; padding: 24px; }

/* Header */
.header-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.left h1 { margin: 0; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
.subtitle { color: var(--muted); margin: 4px 0 0; font-size: 0.95rem; }

/* Header Controls */
.header-controls { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.local-clock {
  padding: 8px 16px;
  border-radius: 99px;
  background: var(--glass);
  border: 1px solid var(--card-border);
  font-family: monospace;
  font-size: 1rem;
  font-weight: 600;
}

/* Toggles & Switches */
.toggles { display: flex; align-items: center; gap: 12px; }

.switch { display: inline-flex; align-items: center; cursor: pointer; position: relative; }
.switch input { display: none; }
.slider-switch {
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--glass);
  border: 1px solid var(--card-border);
  font-size: 0.85rem;
  font-weight: 500;
  user-select: none;
}
.switch input:checked + .slider-switch {
  background: var(--accent);
  color: #0f172a;
  border-color: var(--accent);
}

/* Theme Toggle Button */
.icon-btn {
  background: transparent;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { background: var(--glass); }
.icon-btn svg { width: 20px; height: 20px; fill: currentColor; }

/* Main Grid */
.main-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; }

/* Panels */
.panel {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
}

.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 12px; }
.panel-header h2 { margin: 0; font-size: 1.2rem; font-weight: 600; }

/* Controls (Inputs) */
.controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
input[type="search"], select, input[type="date"], input[type="time"], .tz-picker, .tz-select {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--card-border);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
button {
  background: var(--glass);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
}
button:hover { background: rgba(255,255,255,0.1); }
#add-tz, #add-local { background: var(--accent); color: #0f172a; border-color: transparent; }
#add-tz:hover, #add-local:hover { background: var(--accent-hover); }

/* Clocks Grid */
.clocks-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }

.clock-card {
  background: var(--glass);
  padding: 16px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid var(--card-border);
  position: relative;
  cursor: grab;
  transition: transform 0.2s, box-shadow 0.2s;
}
.clock-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.clock-card.dragging { opacity: 0.5; cursor: grabbing; border: 2px dashed var(--accent); }
.clock-card.drag-over { border: 2px solid var(--accent); transform: scale(1.02); }

.card-top { display: flex; justify-content: space-between; align-items: start; }
.card-title-row { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }
.business-indicator { width: 8px; height: 8px; border-radius: 50%; background-color: transparent; border: 1px solid var(--muted); flex-shrink: 0; }
.business-active .business-indicator { background-color: var(--accent); border-color: var(--accent); box-shadow: 0 0 6px var(--accent); }

.card-title { font-weight: 600; font-size: 0.95rem; line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: pointer; border-bottom: 1px dashed transparent; }
.card-title:hover { border-bottom-color: var(--muted); }

.card-actions { display: flex; gap: 4px; }
.card-actions button {
  padding: 4px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: var(--muted);
}
.card-actions button:hover { background: rgba(255,255,255,0.1); color: var(--text); }
.card-actions button svg { width: 16px; height: 16px; fill: currentColor; }

.card-center { display: flex; gap: 16px; align-items: center; margin-top: 4px; }
.clock-canvas { width: 80px; height: 80px; border-radius: 50%; display: block; }

.time-wrapper { display: flex; flex-direction: column; gap: 2px; }
.time-large { font-weight: 700; font-size: 1.5rem; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.tz-name { color: var(--muted); font-size: 0.85rem; }
.time-diff {
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
  align-self: flex-start;
  margin-top: 4px;
}
[data-theme="light"] .time-diff { background: rgba(16, 185, 129, 0.2); }

/* Converter Panel */
.converter-form .row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-bottom: 16px; align-items: end; }
.converter-form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: var(--muted); font-weight: 500; }

.result-output {
  display: flex; align-items: center;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--glass);
  border: 1px solid var(--card-border);
  min-height: 40px;
  color: var(--accent);
  font-weight: 600;
}

.convert-actions { display: flex; gap: 8px; align-items: center; }
.convert-actions #convert { background: var(--accent); color: #0f172a; border-color: transparent; }

/* Slider */
.slider-panel h3 { margin: 0 0 12px; font-size: 1rem; }
.muted { color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

.slider-info { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 0.9rem; }
.slider-info strong { color: var(--text); }

input[type="range"] {
  width: 100%;
  height: 6px;
  background: var(--glass);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

.slider-actions { margin-top: 16px; display: flex; gap: 8px; }

/* Examples */
.examples-panel { margin-top: 24px; }
.examples p { margin: 8px 0; }
kbd {
  background: var(--glass);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: monospace;
  font-size: 0.85em;
}

/* Footer */
.site-footer { margin-top: 40px; text-align: center; color: var(--muted); font-size: 0.85rem; }

/* Responsive */
@media (max-width: 900px) {
  .main-grid { grid-template-columns: 1fr; }
  .converter-form .row { grid-template-columns: 1fr; }
  .header-row { flex-direction: column; align-items: stretch; }
  .header-controls { justify-content: space-between; }
}