/* ============================================
   NIGHTWAVE - CSS PREMIUM
   ============================================ */

:root {
  /* DARK MODE */
  --primary: #8b5cf6;
  --secondary: #06b6d4;
  --accent: #ec4899;
  --bg-primary: #0a0015;
  --bg-secondary: #1a1335;
  --bg-tertiary: #2a2150;
  --text-primary: #e0e0ff;
  --text-secondary: #a0a0cc;
  --border: rgba(139, 92, 246, 0.2);
  --glow: rgba(139, 92, 246, 0.4);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.theme-neon {
  --primary: #ff006e;
  --secondary: #00f5ff;
  --accent: #ffbe0b;
}

body.theme-cyberpunk {
  --primary: #ff006e;
  --secondary: #00ff00;
  --accent: #00f5ff;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* STARFIELD BACKGROUND */
.starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.15;
}

/* APP WRAPPER */
.app-wrapper {
  position: relative;
  z-index: 10;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(1px);
}

/* HEADER */
.header {
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(139,92,246,0.05) 0%, transparent 100%);
  animation: slideDown 0.6s ease-out;
}

.logo-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.logo {
  font-size: 2.5rem;
  filter: drop-shadow(0 0 20px var(--glow));
}

.logo-text {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

.tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 1px;
}

/* NAVIGATION */
.navigation {
  display: flex;
  gap: 10px;
  padding: 15px 20px;
  background: rgba(26, 19, 53, 0.5);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scroll-behavior: smooth;
}

.nav-btn {
  padding: 12px 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(139, 92, 246, 0.05);
  color: var(--text-primary);
  cursor: pointer;
  white-space: nowrap;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  flex-shrink: 0;
}

.nav-btn:hover {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.15);
  transform: translateY(-2px);
}

.nav-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: var(--primary);
  box-shadow: 0 8px 25px var(--glow);
  color: white;
}

/* CONTENT */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  scroll-behavior: smooth;
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease-out;
}

.tab-content.active {
  display: block;
}

/* MASTER CONTROL */
.master-control {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 25px;
  background: linear-gradient(135deg, rgba(139,92,246,0.1), rgba(6,182,212,0.1));
  border: 1px solid var(--border);
  border-radius: 25px;
  margin-bottom: 30px;
  backdrop-filter: blur(10px);
}

.btn-play-global {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--primary);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 40px var(--glow);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-play-global:hover {
  transform: scale(1.1);
  box-shadow: 0 0 60px var(--glow);
}

.btn-play-global.playing {
  animation: pulse 1.5s infinite;
}

.master-slider-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.master-slider-container label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.master-slider {
  width: 100%;
  height: 8px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.2);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.master-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  cursor: pointer;
  box-shadow: 0 0 20px var(--glow);
}

.master-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  cursor: pointer;
  border: none;
  box-shadow: 0 0 20px var(--glow);
}

#master-volume-value {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* SOUNDS GRID */
.sounds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.sound-card {
  background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(6,182,212,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.sound-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s;
}

.sound-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 15px 40px var(--glow);
}

.sound-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  filter: drop-shadow(0 0 10px var(--glow));
}

.sound-name {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.sound-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.sound-slider {
  width: 100%;
  height: 6px;
  margin-bottom: 10px;
}

.volume-display {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.sound-play-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: rgba(139, 92, 246, 0.1);
  color: white;
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
  margin: 0 auto;
}

.sound-play-btn:hover {
  background: var(--primary);
  transform: scale(1.1);
  box-shadow: 0 0 20px var(--glow);
}

.sound-play-btn.playing {
  background: var(--accent);
  border-color: var(--accent);
  animation: pulse 1s infinite;
}

/* MIXER */
.mixer-header {
  text-align: center;
  margin-bottom: 30px;
}

.mixer-header h2 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.mixer-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.mixer-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.mixer-sliders {
  background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(6,182,212,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 25px;
  backdrop-filter: blur(10px);
}

.mixer-item {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.mixer-item:last-child {
  margin-bottom: 0;
}

.mixer-label {
  min-width: 80px;
  font-weight: 600;
  color: var(--text-primary);
}

.mixer-item input {
  flex: 1;
  height: 8px;
}

.mixer-value {
  min-width: 40px;
  text-align: right;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
}

/* PRESETS */
.mixer-presets {
  background: linear-gradient(135deg, rgba(6,182,212,0.08), rgba(139,92,246,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 25px;
  backdrop-filter: blur(10px);
}

.mixer-presets h3 {
  margin-bottom: 15px;
  color: var(--text-primary);
}

.presets-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
  max-height: 200px;
  overflow-y: auto;
}

.preset-item {
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.preset-item:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary);
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-secondary);
  padding: 20px;
}

.preset-controls {
  display: flex;
  gap: 10px;
}

#preset-name {
  flex: 1;
  padding: 12px 15px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* FOCUS SECTION */
.focus-header {
  text-align: center;
  margin-bottom: 30px;
}

.focus-header h2 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.focus-container {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.timer-display-large {
  text-align: center;
  padding: 40px 20px;
  background: linear-gradient(135deg, rgba(139,92,246,0.1), rgba(6,182,212,0.1));
  border: 2px solid var(--border);
  border-radius: 30px;
  backdrop-filter: blur(10px);
}

.time-big {
  font-size: 4.5rem;
  font-weight: 300;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 3px;
  margin-bottom: 15px;
}

.phase-label {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

.focus-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-focus {
  padding: 15px 30px;
  border-radius: 25px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-start {
  background: linear-gradient(135deg, #10b981, #34d399);
  color: white;
  box-shadow: 0 5px 20px rgba(16, 185, 129, 0.3);
}

.btn-pause {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: white;
  box-shadow: 0 5px 20px rgba(245, 158, 11, 0.3);
}

.btn-reset {
  background: rgba(139, 92, 246, 0.2);
  color: var(--primary);
  border: 1px solid var(--primary);
}

/* SETTINGS */
.settings-header {
  text-align: center;
  margin-bottom: 30px;
}

.settings-header h2 {
  font-size: 1.8rem;
}

.settings-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.setting-card {
  background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(6,182,212,0.08));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  backdrop-filter: blur(10px);
}

.setting-card h3 {
  margin-bottom: 15px;
  color: var(--text-primary);
}

.setting-card.danger {
  border-color: rgba(239, 68, 68, 0.3);
}

.setting-card.info {
  border-color: rgba(59, 130, 246, 0.3);
}

.setting-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.theme-options {
  display: flex;
  gap: 10px;
}

.theme-btn {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: rgba(139, 92, 246, 0.05);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
}

.theme-btn:hover {
  border-color: var(--primary);
}

.theme-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.toggle input {
  width: 50px;
  height: 28px;
  appearance: none;
  background: rgba(139, 92, 246, 0.2);
  border-radius: 15px;
  cursor: pointer;
  transition: background 0.3s;
  position: relative;
}

.toggle input::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  background: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: left 0.3s;
}

.toggle input:checked {
  background: var(--primary);
}

.toggle input:checked::after {
  left: 24px;
}

/* BUTTONS */
.btn-primary {
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 5px 15px var(--glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--glow);
}

.btn-secondary {
  padding: 12px 24px;
  background: rgba(139, 92, 246, 0.2);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

.btn-danger {
  padding: 12px 24px;
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border: 1px solid #ef4444;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

/* FLOATING TIMER */
.floating-timer {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.8rem;
  font-weight: 600;
  box-shadow: 0 10px 40px var(--glow);
  z-index: 100;
  animation: pulse 1.5s infinite;
}

#timer-value {
  font-family: 'Courier New', monospace;
}

/* INSTALL PROMPT */
.install-prompt {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 20px 30px;
  border-radius: 50px;
  box-shadow: 0 10px 40px var(--glow);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 20px;
  animation: slideUp 0.5s ease-out;
}

.install-content {
  display: flex;
  align-items: center;
  gap: 20px;
}

.btn-install {
  padding: 10px 20px;
  background: white;
  color: var(--primary);
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
}

.btn-dismiss {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid white;
  border-radius: 15px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
}

/* TOAST NOTIFICATION */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(150px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 15px 30px;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 40px var(--glow);
  z-index: 999;
  transition: transform 0.3s ease-out;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ANIMATIONS */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(150px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* SCROLLBAR */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(139, 92, 246, 0.1);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 10px;
}

/* RESPONSIVE */

.logo-img {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  object-fit: cover;
  filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.5));
}

    @media (max-width: 768px) {
  .logo-text {
    font-size: 1.5rem;
  }

  .sounds-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .time-big {
    font-size: 3rem;
  }

  .master-control {
    flex-direction: column;
  }

  .settings-container {
    grid-template-columns: 1fr;
  }

  .floating-timer {
    width: 80px;
    height: 80px;
    font-size: 1.3rem;
    bottom: 20px;
    right: 20px;
  }

  .install-prompt {
    bottom: 20px;
    left: 10px;
    right: 10px;
    transform: none;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 15px;
  }

  .logo {
    font-size: 2rem;
  }

  .sounds-grid {
    grid-template-columns: 1fr;
  }

  .time-big {
    font-size: 2.5rem;
  }

  .focus-controls {
    flex-direction: column;
  }

  .btn-focus {
    width: 100%;
  }
}