/**
 * edgeFlow.js Demo - Spotify-inspired Theme
 * 
 * Design: Spotify color palette + liquid glass
 * - Deep blacks and grays
 * - Signature green accent
 * - Clean, bold typography
 * - Subtle glass effects
 */

/* ==========================================================================
   1. Variables & Reset
   ========================================================================== */

:root {
  /* 牛油果绿配色 */
  --color-accent: #7fa921;
  --color-accent-light: #8fbc2a;
  --color-accent-dim: rgba(127, 169, 33, 0.12);
  --color-dark: #5a5755;
  --color-light: #e2e1e6;

  /* Background - 明亮风格 */
  --bg-base: #d8d7dc;
  --bg-elevated: var(--color-light);
  --bg-highlight: #eaeaed;

  /* Glass - 浅色玻璃效果 */
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-bg-hover: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-border-hover: rgba(255, 255, 255, 0.95);
  --glass-highlight: rgba(255, 255, 255, 0.5);

  /* Text - 深色文字 */
  --text-primary: var(--color-dark);
  --text-secondary: #6e6b69;
  --text-muted: #8a8886;

  /* Accent variations */
  --accent: var(--color-accent);
  --accent-hover: var(--color-accent-light);
  --accent-dim: var(--color-accent-dim);

  /* Status */
  --success: var(--color-accent);
  --warning: #d4a520;
  --error: #c45c4a;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Fonts */
  --font-sans: 'Circular', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', monospace;

  /* Glass blur */
  --blur-glass: 40px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(145deg, #d0cfd4 0%, var(--bg-base) 50%, #cccbd0 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Subtle gradient overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 500px;
  background: linear-gradient(180deg, 
    rgba(127, 169, 33, 0.1) 0%, 
    transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* ==========================================================================
   2. Layout
   ========================================================================== */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--space-xl);
  position: relative;
  z-index: 1;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ==========================================================================
   3. Header
   ========================================================================== */

header {
  text-align: center;
  padding: 3rem 2rem;
  margin-bottom: 2rem;
  position: relative;
  
  /* 绿色渐变背景 */
  background: linear-gradient(135deg, var(--color-accent) 0%, #6a9020 100%);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 10px 40px -10px rgba(127, 169, 33, 0.4);
}

/* 白色光晕 */
header::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 250px;
  background: radial-gradient(ellipse, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-sm);
  position: relative;
}

h1 span {
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 白色下划线 */
h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 2px;
  margin: var(--space-md) auto 0;
}

.subtitle {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  font-weight: 400;
  position: relative;
}

/* ==========================================================================
   4. Cards - Spotify Style with Glass
   ========================================================================== */

.bento-card {
  position: relative;
  padding: 1.25rem;
  
  /* 浅色玻璃卡片 */
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  
  box-shadow: 
    0 4px 24px -8px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.8);
  
  transition: all 0.3s ease;
}

.bento-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: 
    0 8px 32px -8px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.9);
}

/* Card Header */
.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  
  /* 统一黄色背景 */
  background: #f0c850;
}

.card-icon.pink,
.card-icon.green,
.card-icon.orange { 
  background: #f0c850;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ==========================================================================
   5. Components
   ========================================================================== */

/* Buttons */
button {
  position: relative;
  padding: 0.75rem 2rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: all 0.2s ease;
  
  /* Primary accent button */
  background: var(--accent);
  border: none;
  color: #ffffff;
  box-shadow: 0 4px 12px -4px rgba(127, 169, 33, 0.4);
}

button:hover {
  background: var(--accent-hover);
  transform: scale(1.04);
  box-shadow: 0 6px 16px -4px rgba(127, 169, 33, 0.5);
}

button:active {
  transform: scale(1);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(66, 63, 61, 0.2);
  color: var(--color-dark);
  box-shadow: none;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(66, 63, 61, 0.3);
  transform: scale(1.04);
  box-shadow: 0 4px 12px -4px rgba(0, 0, 0, 0.1);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}

.btn-group {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Inputs */
input,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: all 0.2s;
  
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(66, 63, 61, 0.15);
  color: var(--text-primary);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 3px rgba(127, 169, 33, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

textarea {
  min-height: 80px;
  resize: vertical;
}

/* Status List */
.status-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.status-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-sm);
}

.status-badge {
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-success { 
  background: var(--accent-dim); 
  color: var(--accent);
}
.status-warning { 
  background: rgba(245, 158, 11, 0.15); 
  color: var(--warning); 
}
.status-error { 
  background: rgba(233, 20, 41, 0.15); 
  color: var(--error); 
}
.status-pending { 
  background: rgba(255, 255, 255, 0.05); 
  color: var(--text-muted); 
}

/* ==========================================================================
   6. Output & Metrics
   ========================================================================== */

.output {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  overflow-x: auto;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.7;
  
  background: var(--color-dark);
  border-radius: var(--radius-md);
  color: var(--color-light);
}

.output pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
}

.output .success { color: var(--accent); }
.output .error { color: #e8806e; }
.output .info { color: var(--color-light); }
.output .warn { color: #e8c860; }

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: var(--space-md);
}

.metric {
  text-align: center;
  padding: var(--space-md);
  
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  transition: background 0.2s;
}

.metric:hover {
  background: rgba(255, 255, 255, 0.7);
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.metric-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

/* ==========================================================================
   7. Modal
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  
  background: rgba(66, 63, 61, 0.6);
  backdrop-filter: blur(8px);
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal {
  position: relative;
  width: 100%;
  max-width: 1200px;
  height: 90vh;
  overflow: hidden;
  
  background: var(--color-light);
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 80px -20px rgba(0, 0, 0, 0.3);
  
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  background: rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(66, 63, 61, 0.1);
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  
  background: rgba(196, 92, 74, 0.1);
  border: none;
  border-radius: var(--radius-full);
  color: var(--error);
  transition: all 0.2s;
}

.modal-close:hover {
  background: rgba(196, 92, 74, 0.2);
  color: var(--error);
  transform: scale(1.1);
}

.modal-frame {
  width: 100%;
  height: calc(100% - 60px);
  border: none;
  background: var(--color-dark);
}

/* ==========================================================================
   8. Footer
   ========================================================================== */

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--accent);
}

/* ==========================================================================
   9. Utilities
   ========================================================================== */

.hidden { display: none !important; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }

/* Loader */
.loader {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(127, 169, 33, 0.3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: var(--space-sm);
}

/* ==========================================================================
   10. Animations
   ========================================================================== */

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(66, 63, 61, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(66, 63, 61, 0.5);
}

/* ==========================================================================
   11. Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .span-3,
  .span-4,
  .span-5 { grid-column: span 6; }
  
  .span-7,
  .span-8 { grid-column: span 12; }
}

@media (max-width: 768px) {
  .container { padding: var(--space-lg); }
  
  h1 { font-size: 2rem; }
  
  header { padding: 2rem 1.5rem; }
  
  .bento-grid { grid-template-columns: 1fr; }
  
  .span-3,
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 { grid-column: span 1; }
  
  button {
    padding: 0.625rem 1.5rem;
  }
  
  .modal { height: 95vh; }
  .modal-overlay { padding: var(--space-lg); }
}

/* ==========================================================================
   12. SAM Interactive Segmentation
   ========================================================================== */

.sam-container {
  position: relative;
  width: 100%;
  min-height: 250px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-dark);
}

.sam-upload {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.sam-upload:hover {
  border-color: var(--accent);
  background: rgba(127, 169, 33, 0.1);
}

.sam-upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-light);
  opacity: 0.7;
}

.sam-upload-icon {
  font-size: 2.5rem;
}

.sam-workspace {
  position: relative;
  width: 100%;
  height: 250px;
}

.sam-workspace canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#sam-canvas {
  z-index: 1;
}

#sam-mask-canvas {
  z-index: 2;
  pointer-events: none;
  opacity: 0.5;
}

/* Click indicator */
.sam-point {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  pointer-events: none;
  animation: pointPulse 0.3s ease-out;
}

.sam-point.positive {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(127, 169, 33, 0.3);
}

.sam-point.negative {
  background: var(--error);
  box-shadow: 0 0 0 3px rgba(196, 92, 74, 0.3);
}

@keyframes pointPulse {
  0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
  50% { transform: translate(-50%, -50%) scale(1.2); }
  100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* ==========================================================================
   13. AI Chat
   ========================================================================== */

.chat-container {
  display: flex;
  flex-direction: column;
  height: 400px;
  min-height: 300px;
  background: var(--color-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--color-light);
  opacity: 0.7;
}

.chat-welcome-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.chat-welcome p {
  margin: var(--space-xs) 0;
  font-size: 0.875rem;
}

.chat-welcome-hint {
  opacity: 0.6;
  font-size: 0.75rem !important;
}

.chat-message {
  max-width: 85%;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  line-height: 1.5;
  animation: messageSlide 0.2s ease-out;
}

@keyframes messageSlide {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.user {
  align-self: flex-end;
  background: var(--accent);
  color: white;
  border-bottom-right-radius: 4px;
}

.chat-message.assistant {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-light);
  border-bottom-left-radius: 4px;
}

.chat-message.assistant.typing::after {
  content: '▋';
  animation: blink 0.7s infinite;
}

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

.chat-input-container {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: rgba(0, 0, 0, 0.2);
}

.chat-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-light);
  font-size: 0.875rem;
}

.chat-input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.15);
}

.chat-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.chat-input-container button {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.75rem;
}

.chat-status {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.chat-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.chat-status-dot.loading {
  background: var(--warning);
  animation: pulse 0.5s infinite;
}

.chat-status-dot.error {
  background: var(--error);
  animation: none;
}

/* ==========================================================================
   14. Model Loader
   ========================================================================== */

.model-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 250px;
  background: var(--color-dark);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
}

.loader-content {
  text-align: center;
  max-width: 300px;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-lg);
  border: 3px solid rgba(127, 169, 33, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loader-text {
  color: var(--color-light);
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}

.loader-detail {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.loader-info {
  color: var(--color-light);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.loader-info p {
  margin: var(--space-xs) 0;
}

.loader-warning {
  color: var(--warning) !important;
  font-size: 0.75rem !important;
  opacity: 0.9;
}

.loader-btn {
  margin-bottom: var(--space-lg);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--space-md) 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.3s ease;
}

.progress-fill.downloading {
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  animation: progressPulse 1.5s ease-in-out infinite;
}

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

/* Model loader states */
.model-loader.loading .loader-spinner {
  display: block;
}

.model-loader.ready {
  display: none;
}

/* Success state for SAM */
.sam-ready .model-loader {
  display: none;
}

.sam-ready .sam-container {
  display: block !important;
}