/* ==========================================================================
   AI-TRANS SHOWCASE — DESIGN SYSTEM & TOKENS
   ========================================================================== */

:root {
  --bg-primary: #070913;
  --bg-secondary: #0D1127;
  --bg-card: rgba(18, 24, 49, 0.7);
  --bg-card-hover: rgba(26, 35, 71, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-active: rgba(99, 102, 241, 0.12);
  
  --accent-cyan: #00F0FF;
  --accent-blue: #3B82F6;
  --accent-indigo: #6366F1;
  --accent-purple: #A855F7;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dark: #64748B;
  
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-glow: rgba(0, 240, 255, 0.3);
  
  --glow-cyan: 0 0 30px rgba(0, 240, 255, 0.25);
  --glow-indigo: 0 0 35px rgba(99, 102, 241, 0.3);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(0, 240, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(168, 85, 247, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Background Grid Effect */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-size: 50px 50px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Bilingual Helper */
body.lang-en .es-only { display: none !important; }
body.lang-es .en-only { display: none !important; }

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(7, 9, 19, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand-text span {
  color: var(--accent-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-smooth);
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-indigo);
}

.btn-primary-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-blue));
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
  transition: var(--transition-smooth);
}

.btn-primary-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.55);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.gradient-text {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--accent-cyan) 60%, var(--accent-indigo) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn-cta-main {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent-indigo) 0%, #4F46E5 50%, var(--accent-cyan) 100%);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
  transition: var(--transition-smooth);
}

.btn-cta-main:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.6);
}

.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.btn-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-cyan);
}

/* Tech Highlights Grid */
.hero-specs-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.spec-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: left;
  transition: var(--transition-smooth);
}

.spec-pill:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: var(--glow-cyan);
}

.spec-pill-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.spec-pill-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.spec-pill-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   INTERACTIVE SIMULATOR (4 TABS)
   ========================================================================== */
.simulator-section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.2);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.sim-container {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.sim-tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(13, 17, 39, 0.9);
  overflow-x: auto;
}

.sim-tab-btn {
  flex: 1;
  min-width: 170px;
  padding: 18px 24px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.sim-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
}

.sim-tab-btn.active {
  color: var(--accent-cyan);
  background: var(--bg-glass-active);
  border-bottom-color: var(--accent-cyan);
}

.sim-tab-content {
  padding: 40px;
}

.sim-panel {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.sim-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Panel 1: Text Simulator */
.text-sim-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sim-box {
  background: rgba(7, 9, 19, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.sim-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.lang-select {
  background: var(--bg-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  outline: none;
}

.sim-badge-live {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-textarea {
  width: 100%;
  height: 140px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-family: var(--font-sans);
  resize: none;
  outline: none;
  line-height: 1.5;
}

.sim-output {
  width: 100%;
  height: 140px;
  color: var(--accent-cyan);
  font-size: 1.05rem;
  line-height: 1.5;
  overflow-y: auto;
}

.sim-stats-bar {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dark);
}

.sim-btn-action {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-blue));
  border: none;
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  align-self: flex-end;
  margin-top: 12px;
  transition: var(--transition-smooth);
}

.sim-btn-action:hover {
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

/* Panel 2: Walkie-Talkie Speech */
.speech-sim-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
}

.speaker-card {
  background: rgba(7, 9, 19, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.speaker-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-indigo));
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.speaker-bubble {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-top: 14px;
  font-size: 0.95rem;
  min-height: 80px;
  text-align: left;
}

.waveform-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.wave-bars {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 40px;
}

.wave-bar {
  width: 4px;
  height: 10px;
  background: var(--accent-cyan);
  border-radius: 2px;
  animation: soundWave 1.2s infinite ease-in-out;
}

.wave-bar:nth-child(2) { animation-delay: 0.2s; }
.wave-bar:nth-child(3) { animation-delay: 0.4s; }
.wave-bar:nth-child(4) { animation-delay: 0.1s; }
.wave-bar:nth-child(5) { animation-delay: 0.3s; }

@keyframes soundWave {
  0%, 100% { height: 8px; }
  50% { height: 35px; background: var(--accent-indigo); }
}

.mic-action-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border: none;
  color: #070913;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
  transition: var(--transition-smooth);
}

.mic-action-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
}

/* Panel 3: Docs OCR */
.docs-sim-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.doc-preview-box {
  background: rgba(7, 9, 19, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.doc-page-mockup {
  background: #FFFFFF;
  color: #1E293B;
  border-radius: 6px;
  padding: 24px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.5;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  min-height: 220px;
}

.doc-page-mockup h4 {
  font-size: 1.1rem;
  color: #0F172A;
  margin-bottom: 8px;
  border-bottom: 2px solid #E2E8F0;
  padding-bottom: 4px;
}

.ocr-scanner-line {
  position: absolute;
  top: 40px;
  left: 24px;
  right: 24px;
  height: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  animation: scanDoc 3s infinite ease-in-out;
}

@keyframes scanDoc {
  0%, 100% { top: 40px; opacity: 0.2; }
  50% { top: 240px; opacity: 1; }
}

.doc-tech-details {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.doc-feature-bullet {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  padding: 16px;
  border-radius: var(--radius-md);
  display: flex;
  gap: 14px;
}

.doc-feature-bullet h5 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.doc-feature-bullet p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Panel 4: AI Voice Tutor Simulation */
.tutor-sim-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.tutor-card {
  background: rgba(7, 9, 19, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tutor-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.tutor-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.karaoke-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.highlight-word {
  background: rgba(245, 158, 11, 0.35);
  color: #FCD34D;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  border-bottom: 2px solid #F59E0B;
  transition: all 0.2s;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
}

/* ==========================================================================
   ARCHITECTURE PIPELINE & BENCHMARKS
   ========================================================================== */
.architecture-section {
  padding: 100px 0;
  position: relative;
}

.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.pipeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  transition: var(--transition-smooth);
}

.pipeline-card:hover {
  border-color: var(--accent-indigo);
  transform: translateY(-4px);
  box-shadow: var(--glow-indigo);
}

.pipeline-step {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.pipeline-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.pipeline-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.pipeline-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
}

/* Benchmarks Table */
.benchmarks-container {
  margin-top: 60px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(16px);
}

.table-responsive {
  overflow-x: auto;
}

.benchmarks-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.benchmarks-table th {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.benchmarks-table td {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-main);
}

.benchmarks-table tr:last-child td {
  border-bottom: none;
}

.benchmarks-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.latency-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  padding: 80px 0 40px;
  background: #04050B;
  border-top: 1px solid var(--border-glass);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-brand {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-dark);
}

/* Responsive Rules */
@media (max-width: 900px) {
  .text-sim-grid, .speech-sim-grid, .docs-sim-wrapper, .tutor-sim-container {
    grid-template-columns: 1fr;
  }
  
  .speech-sim-grid {
    gap: 16px;
  }
  
  .waveform-center {
    flex-direction: row;
    justify-content: center;
  }
  
  .nav-links {
    display: none;
  }
}