/* NightWave — Premium Dark UI */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── VARIABLES ─────────────────────────────────────────── */
:root {
  --bg: #06040f;
  --bg2: #0d0a1e;
  --bg3: #130f27;
  --card: rgba(255,255,255,0.04);
  --card-hover: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.08);
  --border-glow: rgba(124,58,237,0.4);
  --primary: #7c3aed;
  --primary-light: #a855f7;
  --accent: #06b6d4;
  --accent2: #ec4899;
  --text: #e2e0f0;
  --text-muted: #7b7a99;
  --text-dim: #4a4866;
  --success: #10b981;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --glow: 0 0 30px rgba(124,58,237,0.25);
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
  --font: 'Space Grotesk', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

[data-theme="neon"] {
  --primary: #00f5ff;
  --primary-light: #80ffff;
  --accent: #ff00ff;
  --accent2: #ffff00;
  --border-glow: rgba(0,245,255,0.4);
  --glow: 0 0 30px rgba(0,245,255,0.25);
  --card: rgba(0,245,255,0.04);
}

[data-theme="cyberpunk"] {
  --primary: #f9e000;
  --primary-light: #ffe94d;
  --accent: #ff003c;
  --accent2: #00ff9f;
  --border-glow: rgba(249,224,0,0.4);
  --glow: 0 0 30px rgba(249,224,0,0.2);
  --card: rgba(249,224,0,0.03);
}

/* ── RESET ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── CANVAS BG ──────────────────────────────────────────── */
#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(124,58,237,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(6,182,212,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 60% 40%, rgba(236,72,153,0.07) 0%, transparent 60%);
  animation: breathe 12s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes breathe {
  0%   { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1;   transform: scale(1.05); }
}

/* ── LAYOUT ─────────────────────────────────────────────── */
.app-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
}

/* ── HEADER ─────────────────────────────────────────────── */
header {
  padding: 20px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--glow);
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#install-btn {
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  color: var(--primary-light);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
  letter-spacing: 0.3px;
}
#install-btn:hover { background: rgba(124,58,237,0.35); }
#install-btn.hidden { display: none; }

/* ── MASTER CONTROLS ────────────────────────────────────── */
.master-bar {
  margin: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  backdrop-filter: blur(20px);
}

.master-state {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  transition: var(--transition);
  position: relative;
  cursor: default;
}
.master-state.playing {
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(124,58,237,0.5);
}
.master-state.playing::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(124,58,237,0.3);
  animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.5); opacity: 0; }
}

.master-vol-wrap { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.master-label { font-size: 11px; color: var(--text-muted); font-weight: 500; letter-spacing: 0.5px; text-transform: uppercase; }
.master-row { display: flex; align-items: center; gap: 10px; }
.master-row input { flex: 1; }
.master-val { font-size: 12px; color: var(--text-muted); font-family: var(--mono); min-width: 36px; }

/* ── NAV ────────────────────────────────────────────────── */
nav {
  display: flex;
  gap: 4px;
  padding: 0 20px;
  overflow-x: auto;
  scrollbar-width: none;
}
nav::-webkit-scrollbar { display: none; }

nav button {
  flex-shrink: 0;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 9px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
  white-space: nowrap;
  letter-spacing: 0.3px;
}
nav button.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 4px 16px rgba(124,58,237,0.4);
}
nav button:not(.active):hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.15);
}

/* ── TAB PANELS ─────────────────────────────────────────── */
.tab-panel { display: none; padding: 20px; animation: fadeUp 0.3s ease; }
.tab-panel.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── SOUND GRID ─────────────────────────────────────────── */
#sound-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.sound-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
  cursor: pointer;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}
.sound-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.08), transparent);
  opacity: 0;
  transition: var(--transition);
}
.sound-card.active {
  border-color: var(--primary);
  box-shadow: 0 0 24px rgba(124,58,237,0.3);
}
.sound-card.active::before { opacity: 1; }

.sound-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
  position: relative;
}

.sound-emoji { font-size: 28px; line-height: 1; }
.sound-label { font-size: 14px; font-weight: 600; color: var(--text); }
.sound-desc  { font-size: 11px; color: var(--text-muted); }

.sound-indicator {
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: var(--transition);
}
.sound-indicator.on {
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.vol-wrap { display: flex; align-items: center; gap: 8px; position: relative; z-index: 1; }
.vol-slider { flex: 1; }
.vol-val { font-size: 10px; color: var(--text-muted); font-family: var(--mono); min-width: 28px; text-align: right; }

/* ── RANGE SLIDERS ──────────────────────────────────────── */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(124,58,237,0.6);
  transition: var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.3); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border: none;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
}

/* ── MIXER CONTROLS ─────────────────────────────────────── */
.mixer-controls {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

/* ── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 20px;
  border-radius: 12px;
  border: none;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.3px;
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 16px rgba(124,58,237,0.4);
}
.btn-primary:hover { filter: brightness(1.2); transform: translateY(-1px); }
.btn-ghost {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.15); }
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 10px; }
.btn-full { width: 100%; }

/* ── SECTION TITLES ─────────────────────────────────────── */
.section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}

/* ── TIMER & POMODORO RINGS ─────────────────────────────── */
.ring-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 0;
}

.ring-svg {
  transform: rotate(-90deg);
  overflow: visible;
}

.ring-bg { fill: none; stroke: rgba(255,255,255,0.06); }
.ring-progress {
  fill: none;
  stroke: url(#ringGrad);
  stroke-linecap: round;
  transition: stroke-dashoffset 1s linear;
}

.ring-inner {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.ring-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 220px;
  height: 220px;
}

.ring-time {
  font-family: var(--mono);
  font-size: 42px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -1px;
  transform: rotate(90deg);
}

.ring-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  transform: rotate(90deg);
}

.ring-controls {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  width: 100%;
}

/* ── POMODORO PRESETS ───────────────────────────────────── */
.pomo-presets, .timer-presets {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.pomo-preset, .timer-preset {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
}
.pomo-preset.sel, .timer-preset.sel {
  background: rgba(124,58,237,0.2);
  border-color: var(--primary);
  color: var(--primary-light);
}

.pomo-stats {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}
.pomo-stat { text-align: center; }
.pomo-stat .val { font-size: 22px; font-weight: 700; font-family: var(--mono); color: var(--primary-light); }
.pomo-stat .lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 2px; }

/* ── TIMER CUSTOM ───────────────────────────────────────── */
.timer-custom-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}
.timer-custom-wrap label { font-size: 13px; color: var(--text-muted); white-space: nowrap; }
#timer-custom {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 14px;
  width: 80px;
  outline: none;
  transition: var(--transition);
}
#timer-custom:focus { border-color: var(--primary); }

/* ── PRESETS TAB ────────────────────────────────────────── */
.preset-list { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }

.preset-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}
.preset-item:hover { border-color: rgba(255,255,255,0.12); }
.preset-info { display: flex; flex-direction: column; gap: 4px; }
.preset-name { font-size: 14px; font-weight: 600; color: var(--text); }
.preset-sounds { font-size: 18px; letter-spacing: 2px; }
.preset-actions { display: flex; gap: 8px; }

.btn-load, .btn-del {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-family: var(--font);
}
.btn-load:hover { background: rgba(124,58,237,0.2); color: var(--primary-light); border-color: var(--primary); }
.btn-del:hover  { background: rgba(236,72,153,0.2); color: var(--accent2); border-color: var(--accent2); }

.empty-state {
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
  padding: 32px 0;
}

/* ── SETTINGS ───────────────────────────────────────────── */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.setting-row:last-child { border-bottom: none; }
.setting-info .lbl { font-size: 14px; font-weight: 500; color: var(--text); }
.setting-info .sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.theme-btns { display: flex; gap: 8px; margin-top: 14px; }
.theme-btn {
  flex: 1;
  padding: 10px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  text-align: center;
  transition: var(--transition);
}
.theme-btn.active {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(124,58,237,0.15);
}

/* ── STATS TAB ──────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  text-align: center;
}
.stat-card .val { font-size: 24px; font-weight: 700; font-family: var(--mono); color: var(--primary-light); }
.stat-card .lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 4px; }

/* ── TOAST ──────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(20,16,40,0.95);
  border: 1px solid var(--border-glow);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  pointer-events: none;
  z-index: 9999;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), var(--glow);
  white-space: nowrap;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── BOTTOM NAV ─────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: rgba(6,4,15,0.92);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(24px);
  display: flex;
  padding: 8px 0;
  z-index: 100;
}

.bottom-nav button {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  transition: var(--transition);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.bottom-nav button .ico { font-size: 20px; line-height: 1; transition: var(--transition); }
.bottom-nav button.active { color: var(--primary-light); }
.bottom-nav button.active .ico { transform: scale(1.1); filter: drop-shadow(0 0 6px rgba(124,58,237,0.8)); }

/* ── MAIN CONTENT PADDING ───────────────────────────────── */
main { padding-bottom: 90px; }

/* ── SECTION CARD ───────────────────────────────────────── */
.section-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  backdrop-filter: blur(16px);
}

/* ── SCROLLBAR ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── RESPONSIVE DESKTOP ─────────────────────────────────── */
@media (min-width: 480px) {
  .app-wrap { box-shadow: 0 0 80px rgba(0,0,0,0.8); }
}