/* ==========================================================================
   FaktoriBOT — Design System & Stylesheet
   Dark Glassmorphic Industrial Ops Intelligence Aesthetics
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-dark: #070a12;
  --bg-dark-secondary: #0d1322;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(16, 185, 129, 0.3);

  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --primary-hover: #059669;
  --secondary: #3b82f6;
  --secondary-glow: rgba(59, 130, 246, 0.25);
  --accent-indigo: #6366f1;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --status-critical: #ef4444;
  --status-critical-bg: rgba(239, 68, 68, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-success: #10b981;
  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-info: #06b6d4;
  --status-info-bg: rgba(6, 182, 212, 0.15);

  /* WhatsApp Mockup Colors */
  --wa-dark-bg: #0b141a;
  --wa-chat-bg: #111b21;
  --wa-bubble-incoming: #202c33;
  --wa-bubble-outgoing: #005c4b;
  --wa-green: #25d366;
  --wa-header: #1f2c34;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-bengali: 'Hind Siliguri', 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px -5px rgba(16, 185, 129, 0.3);
  --shadow-glow-blue: 0 0 35px -5px rgba(59, 130, 246, 0.3);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(16, 185, 129, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 85% 60%, rgba(59, 130, 246, 0.08), transparent 60%),
    radial-gradient(ellipse 50% 30% at 15% 40%, rgba(99, 102, 241, 0.07), transparent 60%);
  background-attachment: fixed;
}

/* Bengali font utility */
.lang-bn {
  font-family: var(--font-bengali);
}

/* Links & Buttons */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(7, 10, 18, 0.82);
  border-bottom: 1px solid var(--border-glass);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #10b981, #047857);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 16px var(--primary-glow);
}

.brand-tag {
  background: rgba(16, 185, 129, 0.12);
  color: var(--primary);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--text-main);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #061912;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: #25d366;
  color: #052610;
  box-shadow: 0 4px 18px rgba(37, 211, 102, 0.25);
}

.btn-whatsapp:hover {
  background: #2ee06e;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.4);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.2px;
  max-width: 960px;
  margin: 0 auto 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #10b981 0%, #38bdf8 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 740px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Hero Metrics Strip */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  max-width: 980px;
  margin: 0 auto 60px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

.metric-item {
  text-align: center;
}

.metric-value {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* ==========================================================================
   Interactive Simulator
   ========================================================================== */
.simulator-section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.simulator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-subtle);
}

@media (max-width: 900px) {
  .simulator-grid {
    grid-template-columns: 1fr;
  }
}

/* Phone Mockup */
.whatsapp-window {
  background: var(--wa-chat-bg);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 540px;
}

.wa-header {
  background: var(--wa-header);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.wa-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wa-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #1e293b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.wa-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.wa-members {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.wa-chat-feed {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 0);
  background-size: 16px 16px;
}

.wa-msg {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  position: relative;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.wa-msg-incoming {
  align-self: flex-start;
  background: var(--wa-bubble-incoming);
  color: var(--text-main);
  border-top-left-radius: 2px;
}

.wa-msg-sender {
  font-size: 0.75rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 3px;
}

.wa-msg-time {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-align: right;
  margin-top: 4px;
}

.wa-voice-bubble {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wa-play-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--wa-green);
  color: #062b13;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
}

.wa-waveform {
  height: 18px;
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.wa-bar {
  width: 3px;
  background: #94a3b8;
  border-radius: 2px;
}

/* Simulator Live Pipeline Panel */
.simulator-pipeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pipeline-card {
  background: rgba(13, 19, 34, 0.9);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all 0.2s ease;
}

.pipeline-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.pipeline-step-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.15);
  color: var(--secondary);
}

.classification-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.tag-breakdown { background: var(--status-critical-bg); color: var(--status-critical); }
.tag-defect { background: var(--status-warning-bg); color: var(--status-warning); }
.tag-sop { background: var(--status-success-bg); color: var(--status-success); }
.tag-status { background: var(--status-info-bg); color: var(--status-info); }

.code-snippet {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(0, 0, 0, 0.4);
  padding: 10px;
  border-radius: var(--radius-sm);
  color: #a5f3fc;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.sample-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.sample-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.sample-btn:hover, .sample-btn.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--primary);
  color: var(--primary);
}

/* ==========================================================================
   Feature Cards Grid
   ========================================================================== */
.features-section {
  padding: 80px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px -5px rgba(0, 0, 0, 0.6);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Problem vs Solution Section */
.comparison-section {
  padding: 80px 0;
  background: rgba(13, 19, 34, 0.4);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.compare-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}

.compare-old {
  background: rgba(239, 68, 68, 0.04);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.compare-new {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.3);
  box-shadow: 0 0 40px -10px rgba(16, 185, 129, 0.15);
}

.compare-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.compare-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Pricing Section */
.pricing-section {
  padding: 80px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(16px);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 35px -5px rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.04);
}

.pricing-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #061912;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 14px;
  border-radius: var(--radius-full);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-desc {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.plan-price {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 24px;
}

.plan-price span {
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Compliance & Legal Document Layout
   ========================================================================== */
.legal-wrapper {
  padding: 60px 0 100px;
}

.legal-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-glass);
}

.legal-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.legal-meta {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
  max-width: 880px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.legal-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 20px;
  margin-bottom: 8px;
}

.legal-content p, .legal-content li {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  margin-bottom: 14px;
}

.legal-content ul, .legal-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.callout-box {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.callout-title {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-glass);
  background: #04060b;
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (max-width: 850px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 500px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-link:hover {
  color: var(--primary);
}

.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;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Forms */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-input, .form-textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .legal-content {
    padding: 24px 18px;
  }
}