frontend/src/App.css

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

:root {
  /* Color Palette */
  --bg-app: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-hover: #F1F5F9;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  
  --accent: #0F766E;
  --accent-hover: #0D9488;
  --accent-light: #F0FDFA;
  
  --alert: #D97706;
  --alert-light: #FEF3C7;
  
  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;

  /* Shadows - Premium Soft */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

  /* Geometry */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Fonts */
  --font-ui: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  background-color: var(--bg-app);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
  overflow-x: hidden;
}

html {
  overflow-x: hidden;
  width: 100%;
}

* { box-sizing: border-box; }
h1, h2, h3, h4, p { margin: 0; }

/* SHARED ANIMATIONS & UTILS */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

@keyframes spin { 100% { transform: rotate(360deg); } }
.loader { width: 18px; height: 18px; border: 2px solid #FFF; border-bottom-color: transparent; border-radius: 50%; display: inline-block; animation: spin 1s linear infinite; }

.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--bg-app);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}


/* ========================================================================= */
/* LANDING PAGE                                                              */
/* ========================================================================= */

.landing-container { background: #FFFFFF; display: flex; flex-direction: column; width: 100%; min-height: 100vh; position: relative; }

/* Nav */
.nav-bar { display: flex; justify-content: space-between; align-items: center; padding: 20px 6%; position: absolute; width: 100%; top: 0; z-index: 100; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; color: var(--text-primary); letter-spacing: -0.02em; }
.logo-icon { width: 32px; height: 32px; background: var(--text-primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; }

.nav-actions { display: flex; align-items: center; gap: 24px; }
.btn-text { background: none; border: none; font-family: var(--font-ui); font-weight: 500; font-size: 0.95rem; color: var(--text-secondary); cursor: pointer; transition: color 0.2s; }
.btn-text:hover { color: var(--text-primary); }

.btn-primary { background: var(--text-primary); color: #FFF; border: none; padding: 10px 20px; border-radius: var(--radius-md); font-weight: 500; font-family: var(--font-ui); cursor: pointer; transition: all 0.2s; }
.btn-primary:hover { background: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-1px); }

/* Hero */
.hero-section { padding: 160px 6% 120px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 32px; position: relative; overflow: hidden; }
.hero-badge { display: inline-block; padding: 6px 16px; background: var(--accent-light); color: var(--accent); border-radius: var(--radius-full); font-weight: 600; font-size: 0.85rem; border: 1px solid rgba(15,118,110,0.1); }
.hero-title { font-size: clamp(2.5rem, 8vw, 4.5rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.03em; max-width: 900px; color: var(--text-primary); z-index: 10; padding: 0 20px; }
.hero-description { font-size: 1.25rem; line-height: 1.6; color: var(--text-secondary); max-width: 650px; z-index: 10; }

.hero-buttons { display: flex; gap: 16px; z-index: 10; }
.btn-primary-lg { background: var(--accent); color: #FFF; border: none; padding: 16px 32px; border-radius: var(--radius-full); font-size: 1.1rem; font-weight: 600; display: flex; align-items: center; gap: 8px; cursor: pointer; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.btn-primary-lg:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 12px 24px -4px rgba(15,118,110,0.2); }
.btn-secondary-lg { background: #FFF; color: var(--text-primary); border: 1px solid var(--border-medium); padding: 16px 32px; border-radius: var(--radius-full); font-size: 1.1rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; }
.btn-secondary-lg:hover { background: var(--bg-app); border-color: var(--text-primary); }

.hero-background-glow {
  position: absolute; top: 10%; left: 50%; transform: translateX(-50%); width: 80%; height: 800px;
  background: radial-gradient(circle, rgba(15,118,110,0.06) 0%, rgba(255,255,255,0) 70%); z-index: 0; pointer-events: none;
}

/* Features */
.features-section { padding: 80px 6%; background: var(--bg-surface); }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 40px; max-width: 1400px; margin: 0 auto; }
.feature-card { display: flex; flex-direction: column; gap: 16px; padding: 16px; }
.feature-icon-wrapper { width: 56px; height: 56px; background: var(--accent-light); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--accent); }
.feature-card h3 { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); }
.feature-card p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; }

/* How it Works */
.how-it-works-section { padding: 120px 6%; background: var(--bg-app); }
.section-header { text-align: center; margin-bottom: 80px; }
.section-header h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.02em; }
.section-header p { font-size: 1.1rem; color: var(--text-secondary); }

.steps-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; max-width: 1400px; margin: 0 auto; }
.step-card { background: var(--bg-surface); padding: 48px 32px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border: 1px solid var(--border-light); transition: all 0.3s ease; position: relative; overflow: hidden; }
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.step-numeral { position: absolute; top: 16px; right: 24px; font-size: 5rem; font-weight: 800; color: var(--bg-app); opacity: 0.5; font-family: var(--font-mono); }
.step-card h4 { font-size: 1.25rem; font-weight: 600; margin-bottom: 16px; position: relative; z-index: 10; }
.step-card p { color: var(--text-secondary); line-height: 1.6; position: relative; z-index: 10; }

/* Preview & CTA */
.preview-section { padding: 120px 6% 40px; background: var(--bg-surface); display: flex; justify-content: center; }
.preview-app-window { max-width: 1000px; width: 100%; box-shadow: var(--shadow-lg); border-radius: 12px; border: 1px solid var(--border-medium); overflow: hidden; background: #fff; }
.app-window-header { height: 38px; background: #F1F5F9; border-bottom: 1px solid var(--border-light); display: flex; align-items: center; padding: 0 16px; position: relative; }
.mac-dots { display: flex; gap: 8px; }
.mac-dot { width: 12px; height: 12px; border-radius: 50%; }
.mac-dot.red { background: #FF5F56; } .mac-dot.yellow { background: #FFBD2E; } .mac-dot.green { background: #27C93F; }
.app-title { position: absolute; left: 50%; transform: translateX(-50%); font-family: var(--font-ui); font-size: 0.75rem; color: var(--text-tertiary); font-weight: 500; letter-spacing: 0.05em; }
.app-window-body { height: 500px; padding: 16px; background: var(--bg-app); }
.app-mockup-skeleton { width: 100%; height: 100%; display: flex; gap: 16px; }
.mock-nav { width: 200px; background: #FFF; border-radius: 8px; border: 1px solid var(--border-light); }
.mock-layout { flex: 1; display: flex; flex-direction: column; gap: 16px; }
.mock-top { display: flex; gap: 16px; height: 100px; }
.mock-stat { flex: 1; background: #FFF; border-radius: 8px; border: 1px solid var(--border-light); }
.mock-main { flex: 1; display: flex; gap: 16px; }
.mock-side { width: 250px; background: #FFF; border-radius: 8px; border: 1px solid var(--border-light); }
.mock-center { flex: 1; background: #FFF; border-radius: 8px; border: 1px solid var(--border-light); }

.cta-section { padding: 120px 6%; text-align: center; background: var(--bg-surface); display: flex; flex-direction: column; align-items: center; gap: 24px; }
.cta-section h2 { font-size: 3rem; font-weight: 800; letter-spacing: -0.02em; }
.cta-section p { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 24px; }

.landing-footer { background: var(--bg-app); padding: 40px 6%; text-align: center; border-top: 1px solid var(--border-light); }
.footer-content { display: flex; justify-content: space-between; align-items: center; max-width: 1400px; margin: 0 auto; color: var(--text-tertiary); font-size: 0.9rem; }
@media (max-width: 600px) { .footer-content { flex-direction: column; gap: 16px; } }


/* ========================================================================= */
/* DASHBOARD APPLICATION                                                     */
/* ========================================================================= */

.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  height: 64px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.app-logo { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1rem; color: var(--text-primary); }
.app-badge { font-weight: 500; color: var(--text-tertiary); background: var(--bg-app); padding: 4px 8px; border-radius: 6px; font-size: 0.75rem; letter-spacing: 0.05em; text-transform: uppercase; }

.header-actions { display: flex; align-items: center; gap: 24px; }
.connection-status { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); font-size: 0.8rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.status-orb { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 8px var(--accent); }

.icon-btn, .profile-btn { background: none; border: none; color: var(--text-secondary); cursor: pointer; width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
.icon-btn:hover { background: var(--bg-app); color: var(--text-primary); }
.profile-btn { background: var(--text-primary); color: #FFF; }
.profile-btn:hover { background: var(--accent); }

.dashboard-content {
  flex: 1;
  padding: 32px;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

.dashboard-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Base Panel Styles */
.panel {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.panel-header { display: flex; justify-content: space-between; align-items: center; }
.panel-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); }

/* Metrics Row (Top) */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 1200px) { .metrics-row { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-medium); }
.stat-icon-wrapper { width: 48px; height: 48px; background: var(--bg-app); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); }
.stat-content { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.stat-label { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 1.5rem; font-weight: 700; font-family: var(--font-mono); color: var(--text-primary); }

.stat-control { display: flex; align-items: center; gap: 12px; margin-top: 4px; }
.stat-control input[type="range"] { flex: 1; accent-color: var(--accent); }
.range-val { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 600; }

/* Main Section: Upload + Log */
.main-interaction-row {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 32px;
}
@media (max-width: 1024px) { .main-interaction-row { grid-template-columns: 1fr; } }

/* Upload Component */
.upload-container { display: flex; flex-direction: column; gap: 24px; }
.dropzone {
  flex: 1;
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-md);
  background: var(--bg-app);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}
.dropzone input[type="file"] { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.dropzone:hover, .dropzone.drag-active { border-color: var(--accent); background: var(--accent-light); }
.dropzone-icon { color: var(--text-tertiary); margin-bottom: 16px; transition: transform 0.2s; }
.dropzone:hover .dropzone-icon { transform: translateY(-4px); color: var(--accent); }
.dropzone-text { font-size: 1rem; color: var(--text-primary); margin-bottom: 8px; font-weight: 500; }
.dropzone-primary { color: var(--accent); font-weight: 600; }
.dropzone-secondary { font-size: 0.85rem; color: var(--text-secondary); }

.selected-file-chip { margin-top: 16px; font-family: var(--font-mono); font-size: 0.85rem; background: #FFF; padding: 6px 16px; border-radius: 20px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); z-index: 10; font-weight: 500; }

.btn-action-lg {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--text-primary);
  color: #FFF;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}
.btn-action-lg:not(:disabled):hover { background: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.btn-action-lg:disabled { opacity: 0.6; cursor: not-allowed; }

/* History Component */
.history-container { display: flex; flex-direction: column; gap: 16px; min-height: 400px; }
.record-count { background: var(--bg-app); padding: 4px 12px; border-radius: var(--radius-full); font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); }
.history-list { display: flex; flex-direction: column; gap: 12px; overflow-y: auto; max-height: 340px; padding-right: 8px; }
.history-row { display: flex; align-items: center; gap: 16px; padding: 12px; border: 1px solid var(--border-light); border-radius: var(--radius-md); transition: all 0.2s; cursor: default; }
.history-row:hover { background: var(--bg-app); border-color: var(--border-medium); }
.history-thumb { width: 56px; height: 56px; border-radius: 8px; object-fit: cover; background: var(--border-light); }
.history-details { flex: 1; display: flex; flex-direction: column; gap: 6px; overflow: hidden; }
.history-filename { font-size: 0.95rem; font-weight: 600; font-family: var(--font-mono); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-primary); }
.history-time { font-size: 0.8rem; color: var(--text-secondary); }
.history-status { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.status-badge { padding: 4px 12px; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.status-badge.alert { background: var(--alert-light); color: var(--alert); }
.status-badge.clear { background: var(--bg-app); color: var(--text-secondary); }
.history-score { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.empty-state { padding: 48px; text-align: center; color: var(--text-tertiary); font-weight: 500; border: 2px dashed var(--border-light); border-radius: var(--radius-md); margin-top: 24px; }


/* Bottom Component: Visualizations */
.visualization-container { padding: 32px; }
.frames-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .frames-grid { grid-template-columns: 1fr; } }
.frame-card { display: flex; flex-direction: column; gap: 12px; }
.frame-header { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; text-align: center; }
.frame-content { aspect-ratio: 1; background: var(--bg-app); border-radius: var(--radius-md); border: 1px solid var(--border-light); box-shadow: inset 0 2px 4px rgba(0,0,0,0.02); position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.frame-content.dark-mode { background: #0F172A; border-color: #1E293B; }
.frame-content img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: contain; }
.invert-render { filter: invert(1); }
.feature-overlay { mix-blend-mode: multiply; opacity: 0.8; filter: sepia(1) hue-rotate(130deg) saturate(500%); }