/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  color: #e2e8f0;
  overflow-x: hidden;
}

/* Floating Background Animation */
.floating-symbols {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.floating-symbol {
  position: absolute;
  opacity: 0.08;
  color: #60a5fa;
  animation: floatUp linear infinite;
  pointer-events: none;
  user-select: none;
}

@keyframes floatUp {
  0% {
    transform: translateY(110vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.08;
  }
  90% {
    opacity: 0.08;
  }
  100% {
    transform: translateY(-10vh) rotate(360deg);
    opacity: 0;
  }
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  z-index: 1000;
  padding: 1rem 0;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #60a5fa;
  text-decoration: none;
  text-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #60a5fa;
}

/* Main Container */
.main-container {
  min-height: 100vh;
  padding-top: 5rem;
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

/* Header Section */
.header-section {
  text-align: center;
  margin-bottom: 3rem;
}

.main-title {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, #60a5fa, #3b82f6, #1d4ed8);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
  text-shadow: 0 0 30px rgba(96, 165, 250, 0.3);
}

.subtitle {
  font-size: 1.25rem;
  color: #94a3b8;
  font-weight: 500;
}

/* Content Grid */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

/* Video Section */
.video-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 600px;
  margin: 0 auto;
  border-radius: 24px;
  background: linear-gradient(135deg, #1e293b, #334155);
  box-shadow: 
    0 0 0 1px rgba(148, 163, 184, 0.1),
    0 20px 25px -5px rgba(0, 0, 0, 0.3),
    0 0 50px rgba(59, 130, 246, 0.2);
  overflow: hidden;
}

video, #uploadedImage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 24px;
}

video {
  transform: scaleX(-1);
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 24px;
}

/* Entry Buttons */
.entry-buttons {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.primary-btn, .secondary-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border: none;
  border-radius: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
  min-width: 200px;
  justify-content: center;
}

.primary-btn {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(59, 130, 246, 0.6);
}

.secondary-btn {
  background: rgba(148, 163, 184, 0.1);
  color: #e2e8f0;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.secondary-btn:hover {
  background: rgba(148, 163, 184, 0.2);
  transform: translateY(-2px);
}

.btn-icon {
  font-size: 1.25rem;
}

/* Loading Indicator */
.loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 10;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(96, 165, 250, 0.3);
  border-top: 3px solid #60a5fa;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Controls */
.controls {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.control-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  color: #e2e8f0;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.control-btn:hover {
  background: rgba(148, 163, 184, 0.2);
  transform: translateY(-1px);
}

/* Flip button specific styling */
#flipBtn {
  position: relative;
}

#flipBtn:active {
  transform: translateY(0);
}

/* Detection Section */
.detection-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.detection-card {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

.detection-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.detection-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f1f5f9;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #6b7280;
  transition: background-color 0.3s ease;
}

.detection-content {
  display: flex;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
}

.emoji-display {
  text-align: center;
  flex-shrink: 0;
}

.detected-emoji {
  font-size: 4rem;
  margin-bottom: 1rem;
  animation: pulse 2s ease-in-out infinite;
  filter: drop-shadow(0 0 10px rgba(96, 165, 250, 0.3));
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.confidence-bar {
  width: 80px;
  height: 6px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 3px;
  overflow: hidden;
  margin: 0 auto;
}

.confidence-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #059669);
  border-radius: 3px;
  transition: width 0.5s ease;
  width: 0%;
}

.detection-info {
  flex: 1;
}

.gesture-name {
  font-size: 1.75rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 0.75rem;
}

.translation-text {
  font-size: 1.1rem;
  color: #94a3b8;
  line-height: 1.6;
  font-style: italic;
}

/* Gesture History */
.gesture-history {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding-top: 1.5rem;
}

.gesture-history h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 1rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(148, 163, 184, 0.05);
  border-radius: 12px;
  transition: background-color 0.3s ease;
}

.history-item:hover {
  background: rgba(148, 163, 184, 0.1);
}

.history-emoji {
  font-size: 1.5rem;
}

.history-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.history-name {
  font-weight: 600;
  color: #e2e8f0;
  font-size: 0.9rem;
}

.history-time {
  font-size: 0.75rem;
  color: #94a3b8;
}

.no-history {
  color: #6b7280;
  font-style: italic;
  text-align: center;
  padding: 1rem;
}

/* Supported Gestures */
.supported-gestures {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

.supported-gestures h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 1.5rem;
  text-align: center;
}

.gesture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.gesture-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  background: rgba(148, 163, 184, 0.05);
  border-radius: 16px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.gesture-item:hover {
  background: rgba(148, 163, 184, 0.1);
  transform: translateY(-2px);
}

.gesture-emoji {
  font-size: 2rem;
}

.gesture-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: #94a3b8;
  text-align: center;
}

/* Responsive Design */

/* Large Laptops (1200px+) */
@media (min-width: 1200px) {
  .container {
    padding: 3rem;
  }
  
  .main-title {
    font-size: 3.5rem;
  }
  
  .content-grid {
    gap: 4rem;
  }
}

/* Medium Laptops (992px - 1199px) */
@media (max-width: 1199px) {
  .main-title {
    font-size: 2.5rem;
  }
  
  .content-grid {
    gap: 2rem;
  }
  
  .detection-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }
}

/* Tablets (768px - 991px) */
@media (max-width: 991px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .video-wrapper {
    max-width: 500px;
  }
  
  .main-title {
    font-size: 2.25rem;
  }
  
  .subtitle {
    font-size: 1.1rem;
  }
  
  .detection-content {
    flex-direction: column;
    text-align: center;
  }
  
  .gesture-name {
    font-size: 1.5rem;
  }
  
  .nav-container {
    padding: 0 1.5rem;
  }
}

/* Mobile (481px - 767px) */
@media (max-width: 767px) {
  .container {
    padding: 1rem;
  }
  
  .main-title {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .video-wrapper {
    max-width: 400px;
  }
  
  .detection-card,
  .supported-gestures {
    padding: 1.5rem;
  }
  
  .detected-emoji {
    font-size: 3rem;
  }
  
  .gesture-name {
    font-size: 1.25rem;
  }
  
  .translation-text {
    font-size: 1rem;
  }
  
  .button-group {
    width: 100%;
  }
  
  .primary-btn,
  .secondary-btn {
    width: 100%;
    min-width: auto;
  }
  
  .controls {
    flex-direction: column;
    align-items: center;
  }
  
  .control-btn {
    width: 100%;
    max-width: 200px;
    justify-content: center;
  }
  
  .nav-container {
    padding: 0 1rem;
  }
  
  .nav-logo {
    font-size: 1.25rem;
  }
}

/* Small Mobile (320px - 480px) */
@media (max-width: 480px) {
  .main-container {
    padding-top: 4rem;
  }
  
  .container {
    padding: 0.75rem;
  }
  
  .header-section {
    margin-bottom: 2rem;
  }
  
  .main-title {
    font-size: 1.75rem;
    line-height: 1.2;
  }
  
  .subtitle {
    font-size: 0.9rem;
  }
  
  .video-wrapper {
    max-width: 320px;
  }
  
  .detection-card,
  .supported-gestures {
    padding: 1rem;
  }
  
  .detected-emoji {
    font-size: 2.5rem;
  }
  
  .gesture-name {
    font-size: 1.1rem;
  }
  
  .translation-text {
    font-size: 0.9rem;
  }
  
  .detection-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .detection-header h2 {
    font-size: 1.25rem;
  }
  
  .gesture-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  
  .gesture-item {
    padding: 0.75rem;
  }
  
  .gesture-emoji {
    font-size: 1.5rem;
  }
  
  .gesture-label {
    font-size: 0.7rem;
  }
  
  .primary-btn,
  .secondary-btn {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
  
  .btn-icon {
    font-size: 1.1rem;
  }

  /* Responsive adjustments for flip button */
  #flipBtn {
    min-width: 120px;
  }
}

/* Extra Small Mobile (max-width: 320px) */
@media (max-width: 320px) {
  .main-title {
    font-size: 1.5rem;
  }
  
  .video-wrapper {
    max-width: 280px;
  }
  
  .detection-card,
  .supported-gestures {
    padding: 0.75rem;
  }
  
  .gesture-grid {
    grid-template-columns: 1fr;
  }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
  .main-container {
    padding-top: 3rem;
  }
  
  .header-section {
    margin-bottom: 1.5rem;
  }
  
  .main-title {
    font-size: 2rem;
  }
  
  .content-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  .video-wrapper {
    max-width: 300px;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .video-wrapper {
    box-shadow: 
      0 0 0 1px rgba(148, 163, 184, 0.1),
      0 25px 50px -12px rgba(0, 0, 0, 0.4),
      0 0 60px rgba(59, 130, 246, 0.3);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .floating-symbol,
  .detected-emoji,
  .spinner {
    animation: none;
  }
  
  .primary-btn:hover,
  .secondary-btn:hover,
  .control-btn:hover,
  .gesture-item:hover {
    transform: none;
  }
  
  * {
    transition-duration: 0.01ms !important;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: light) {
  /* Keep dark theme as it's part of the design */
}

/* Print Styles */
@media print {
  .floating-symbols,
  .navbar,
  .controls {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .main-title {
    color: black;
  }
}