/* 110 Global AI - Design System */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* CSS Variables - Design Tokens */
:root {
  /* Colors */
  --color-primary: #0f172a;
  --color-accent: #14b8a6;
  --color-accent-hover: #0d9488;
  --color-surface-1: #f8fafc;
  --color-surface-2: #f1f5f9;
  --color-surface-3: #e2e8f0;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-white: #ffffff;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Typography */
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

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

.font-mono {
  font-family: var(--font-mono);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-12);
}

.section-header p {
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-surface-3);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.5);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text-primary);
  border: 1px solid var(--color-surface-3);
}

.btn-secondary:hover {
  background: var(--color-surface-1);
  border-color: var(--color-text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

/* Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: var(--space-20);
  background: linear-gradient(180deg, var(--color-surface-1) 0%, var(--color-white) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-text {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: var(--space-6);
}

.hero-title {
  margin-bottom: var(--space-6);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
}

.hero-visual {
  position: relative;
}

.hero-chart-preview {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-surface-3);
}

.hero-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
}

.hero-chart-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.hero-chart-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
}

.hero-chart-placeholder {
  height: 200px;
  background: linear-gradient(180deg, rgba(20, 184, 166, 0.05) 0%, rgba(20, 184, 166, 0.15) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: var(--space-4);
  position: relative;
  overflow: hidden;
}

.hero-chart-bars {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  height: 100%;
  width: 100%;
  padding: 0 var(--space-4);
}

.hero-chart-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-hover));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  opacity: 0.8;
  animation: barGrow 1.5s ease-out forwards;
}

@keyframes barGrow {
  from {
    transform: scaleY(0);
    transform-origin: bottom;
  }
  to {
    transform: scaleY(1);
    transform-origin: bottom;
  }
}

/* Benefits Section */
.benefits {
  background: var(--color-white);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.benefit-card {
  background: var(--color-surface-1);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.benefit-card:hover {
  background: var(--color-white);
  border-color: var(--color-surface-3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(20, 184, 166, 0.2));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  color: var(--color-accent);
}

.benefit-title {
  margin-bottom: var(--space-3);
}

.benefit-description {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* How It Works Section */
.how-it-works {
  background: var(--color-surface-1);
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.steps-container::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.67% + 20px);
  right: calc(16.67% + 20px);
  height: 2px;
  background: var(--color-surface-3);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--color-white);
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  position: relative;
  z-index: 1;
}

.step-title {
  margin-bottom: var(--space-3);
}

.step-description {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary), #1e293b);
  color: var(--color-white);
}

.cta-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  margin-bottom: var(--space-4);
}

.cta-content p {
  opacity: 0.8;
  margin-bottom: var(--space-8);
  font-size: 1.125rem;
}

/* Footer */
.footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-12) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
}

.footer-text {
  opacity: 0.6;
  font-size: 0.875rem;
}

/* ============================================
   DASHBOARD STYLES
   ============================================ */

.dashboard-layout {
  min-height: 100vh;
  background: var(--color-surface-1);
}

.dashboard-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-surface-3);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.dashboard-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dashboard-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.dashboard-actions {
  display: flex;
  gap: var(--space-3);
}

.dashboard-main {
  padding: var(--space-8) 0;
}

/* Metric Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.metric-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-surface-3);
  transition: all var(--transition-fast);
}

.metric-card:hover {
  box-shadow: var(--shadow-md);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.metric-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.metric-icon {
  width: 36px;
  height: 36px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.metric-change {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.75rem;
  font-weight: 600;
}

.metric-change.positive {
  color: var(--color-success);
}

.metric-change.negative {
  color: var(--color-error);
}

/* Chart Container */
.chart-container {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-surface-3);
  margin-bottom: var(--space-8);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.chart-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.chart-legend {
  display: flex;
  gap: var(--space-6);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot.prediction {
  background: var(--color-accent);
}

.legend-dot.confidence {
  background: rgba(20, 184, 166, 0.2);
  border: 2px solid var(--color-accent);
}

.chart-wrapper {
  height: 360px;
  position: relative;
}

/* Toggle Buttons */
.toggle-group {
  display: inline-flex;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}

.toggle-btn {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background: var(--color-white);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* Upload Zone */
.upload-section {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-surface-3);
}

.upload-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
}

.upload-section-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.upload-zone {
  border: 2px dashed var(--color-surface-3);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-surface-1);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-accent);
  background: rgba(20, 184, 166, 0.05);
}

.upload-zone-icon {
  width: 56px;
  height: 56px;
  background: var(--color-surface-2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--color-text-muted);
}

.upload-zone-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.upload-zone-text strong {
  color: var(--color-accent);
}

.upload-zone-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.upload-input {
  display: none;
}

/* Status Messages */
.status-message {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
}

.status-message.success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
}

.status-message.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.status-message.loading {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-accent);
}

/* Loading Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

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

/* Data Table */
.data-preview {
  margin-top: var(--space-5);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-surface-3);
}

.data-table th {
  background: var(--color-surface-1);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.data-table td {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.data-table tr:hover td {
  background: var(--color-surface-1);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-visual {
    order: -1;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .steps-container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .steps-container::before {
    display: none;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 120px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .chart-header {
    flex-direction: column;
    gap: var(--space-4);
    align-items: flex-start;
  }

  .chart-legend {
    flex-wrap: wrap;
  }
}