/* =====================================================
   YAPPER - Voice Social Network
   Design System & Styles
   ===================================================== */

:root {
  /* Colors - Vibrant voice-first palette */
  --primary: #7C3AED;          /* Violet - main brand */
  --primary-light: #A78BFA;
  --primary-dark: #5B21B6;
  --secondary: #F97316;        /* Orange - energy/recording */
  --secondary-light: #FDBA74;
  
  /* Semantic colors */
  --success: #10B981;
  --error: #EF4444;
  --warning: #F59E0B;
  
  /* Neutrals */
  --bg-primary: #0F0F14;
  --bg-secondary: #1A1A24;
  --bg-tertiary: #252532;
  --bg-card: #1E1E2A;
  
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0B0;
  --text-tertiary: #6B6B7A;
  
  /* Waveform colors */
  --waveform-active: #7C3AED;
  --waveform-inactive: #3D3D4D;
  --waveform-playing: #A78BFA;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 15px;
  --font-size-lg: 17px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  
  /* Safe areas */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* =====================================================
   App Container - Mobile Frame
   ===================================================== */

.app-container {
  max-width: 430px;
  margin: 0 auto;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

/* Status Bar (fake iOS style) */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  padding-top: calc(var(--spacing-sm) + var(--safe-top));
  font-size: var(--font-size-xs);
  font-weight: 600;
  background: var(--bg-primary);
}

.status-icons {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

/* =====================================================
   Header
   ===================================================== */

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--bg-tertiary);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  font-size: 24px;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-right {
  display: flex;
  gap: var(--spacing-sm);
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  position: relative;
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.notification-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--secondary);
  border-radius: 50%;
}

/* =====================================================
   Tab Navigation
   ===================================================== */

.tab-nav {
  display: flex;
  padding: var(--spacing-sm) var(--spacing-md);
  gap: var(--spacing-sm);
  background: var(--bg-primary);
  overflow-x: auto;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.tab-btn.active {
  color: var(--text-primary);
  background: var(--primary);
}

/* =====================================================
   Voice Feed
   ===================================================== */

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.feed {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  padding-bottom: 160px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Yap Card */
.yap-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.yap-card:active {
  transform: scale(0.98);
}

.yap-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.yap-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  flex-shrink: 0;
}

.yap-user-info {
  flex: 1;
  min-width: 0;
}

.yap-username {
  font-weight: 600;
  font-size: var(--font-size-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.verified-badge {
  color: var(--primary);
  font-size: var(--font-size-sm);
}

.yap-handle {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.yap-time {
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
}

.yap-more {
  color: var(--text-tertiary);
  font-size: var(--font-size-lg);
  padding: var(--spacing-xs);
}

/* Waveform Player */
.yap-player {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.play-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.play-btn:hover {
  background: var(--primary-light);
  transform: scale(1.05);
}

.play-btn.playing {
  background: var(--secondary);
}

.waveform-container {
  flex: 1;
  height: 40px;
  position: relative;
  cursor: pointer;
}

.waveform {
  width: 100%;
  height: 100%;
}

.yap-duration {
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  font-weight: 500;
  min-width: 36px;
  text-align: right;
}

/* Transcript preview */
.yap-transcript {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-style: italic;
}

.yap-transcript::before {
  content: '"';
}

.yap-transcript::after {
  content: '"';
}

/* Topic tag */
.yap-topic {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(124, 58, 237, 0.2);
  color: var(--primary-light);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
}

/* Yap actions */
.yap-actions {
  display: flex;
  justify-content: space-between;
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--bg-tertiary);
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.action-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.action-btn.liked {
  color: var(--error);
}

.action-btn svg {
  width: 18px;
  height: 18px;
}

/* =====================================================
   Now Playing Bar
   ===================================================== */

.now-playing {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 398px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.now-playing.active {
  display: flex;
}

.now-playing-waveform {
  flex-shrink: 0;
}

.now-playing-info {
  flex: 1;
  min-width: 0;
}

.now-playing-user {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.now-playing-duration {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.now-playing-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.speed-btn {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--primary-light);
  padding: var(--spacing-xs);
}

.play-pause-mini {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.close-player {
  color: var(--text-tertiary);
  padding: var(--spacing-xs);
}

.progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 50%;
  background: var(--primary);
  transition: width 0.1s linear;
}

/* =====================================================
   Record FAB
   ===================================================== */

.record-fab {
  position: fixed;
  bottom: 100px;
  right: 20px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 40;
  transition: all 0.3s ease;
}

.record-fab:hover {
  transform: scale(1.1);
}

.record-fab:active {
  transform: scale(0.95);
}

.record-text {
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-top: 2px;
}

/* =====================================================
   Bottom Navigation
   ===================================================== */

.bottom-nav {
  display: flex;
  justify-content: space-around;
  padding: var(--spacing-sm) var(--spacing-md);
  padding-bottom: calc(var(--spacing-sm) + var(--safe-bottom));
  background: var(--bg-secondary);
  border-top: 1px solid var(--bg-tertiary);
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs);
  transition: color 0.2s ease;
}

.nav-btn:hover {
  color: var(--text-secondary);
}

.nav-btn.active {
  color: var(--primary);
}

.nav-btn svg {
  width: 24px;
  height: 24px;
}

/* =====================================================
   Modals
   ===================================================== */

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
}

.modal.active {
  display: block;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: var(--spacing-lg);
  padding-bottom: calc(var(--spacing-lg) + var(--safe-bottom));
  max-height: 85vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Recording Modal */
.recording-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.recording-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.close-modal {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.recording-body {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.recording-visualizer {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.recording-timer {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.recording-limit {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.recording-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.recording-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.recording-btn.cancel {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.recording-btn.record {
  width: 72px;
  height: 72px;
  background: var(--secondary);
  box-shadow: 0 0 0 8px rgba(249, 115, 22, 0.2);
}

.recording-btn.record.recording {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 8px rgba(249, 115, 22, 0.2);
  }
  50% {
    box-shadow: 0 0 0 16px rgba(249, 115, 22, 0.1);
  }
}

.record-circle {
  width: 24px;
  height: 24px;
  background: white;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.recording-btn.record.recording .record-circle {
  border-radius: 4px;
  width: 20px;
  height: 20px;
}

.recording-btn.send {
  background: var(--primary);
  color: white;
}

.recording-btn.send:disabled {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
}

/* Topic Selector */
.topic-selector {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.topic-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.topic-chips {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.topic-chip {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-full);
  transition: all 0.2s ease;
}

.topic-chip:hover {
  background: var(--bg-card);
}

.topic-chip.active {
  background: var(--primary);
  color: white;
}

/* Yap Detail Modal */
.yap-detail {
  max-height: 90vh;
}

.yap-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.back-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.more-btn {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  padding: var(--spacing-sm);
}

.yap-detail-content {
  margin-bottom: var(--spacing-lg);
}

.yap-replies {
  border-top: 1px solid var(--bg-tertiary);
  padding-top: var(--spacing-md);
}

.yap-replies h3 {
  font-size: var(--font-size-md);
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.reply-input {
  position: sticky;
  bottom: 0;
  background: var(--bg-secondary);
  padding-top: var(--spacing-md);
}

.voice-reply-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all 0.2s ease;
}

.voice-reply-btn:hover {
  background: var(--primary);
}

/* =====================================================
   Animations
   ===================================================== */

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

.yap-card {
  animation: fadeIn 0.3s ease;
}

/* =====================================================
   Responsive
   ===================================================== */

@media (min-width: 768px) {
  .app-container {
    border-left: 1px solid var(--bg-tertiary);
    border-right: 1px solid var(--bg-tertiary);
  }
  
  .modal-content {
    max-width: 430px;
    margin: 0 auto;
  }
}

/* =====================================================
   Scrollbar
   ===================================================== */

.feed::-webkit-scrollbar {
  width: 4px;
}

.feed::-webkit-scrollbar-track {
  background: transparent;
}

.feed::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 2px;
}

.feed::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}