/* ===================
   CSS Variables
=================== */
:root {
  --color-primary: #667eea;
  --color-primary-dark: #5a67d8;
  --color-secondary: #764ba2;
  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-danger: #ef4444;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-border: #e2e8f0;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

/* ===================
   Utilities
=================== */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===================
   Buttons
=================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-border);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ===================
   Navigation
=================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

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

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

.nav-actions {
  display: flex;
  gap: 0.75rem;
}

/* ===================
   Hero Section
=================== */
.hero {
  padding: 8rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  min-height: 100vh;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* Scorecard Preview */
.scorecard-preview {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
}

.scorecard-header {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.ticker-badge {
  background: var(--color-primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
}

.period-badge {
  background: var(--color-border);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.scorecard-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.scorecard-item {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
}

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

.indicator.green { background: var(--color-success); }
.indicator.yellow { background: var(--color-warning); }
.indicator.red { background: var(--color-danger); }

.metric-name {
  font-weight: 500;
}

.metric-value {
  font-family: 'SF Mono', Monaco, monospace;
  font-weight: 600;
}

/* ===================
   Sections
=================== */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===================
   Features Section
=================== */
.features {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--color-bg-card);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

/* ===================
   Demo Section
=================== */
.demo {
  padding: 6rem 2rem;
  background: var(--color-bg-card);
}

.demo-container {
  max-width: 800px;
  margin: 0 auto;
}

.demo-input-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.demo-input {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

.demo-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.demo-select {
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background: white;
  cursor: pointer;
}

.demo-result {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  min-height: 300px;
  padding: 2rem;
}

.demo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 250px;
  color: var(--color-text-secondary);
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* Upload Options */
.upload-options {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.upload-options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.upload-options select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
}

/* AI Toggle */
.ai-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(99, 102, 241, 0.2);
  transition: all 0.2s;
}

.ai-toggle:hover {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
  border-color: rgba(99, 102, 241, 0.4);
}

.ai-toggle input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--color-primary);
}

.ai-toggle .ai-label {
  font-weight: 500;
  color: var(--color-text);
}

.ai-toggle .ai-hint {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* Demo Results */
.demo-scorecard {
  display: grid;
  gap: 1.5rem;
}

.demo-category {
  background: var(--color-bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-md);
}

.demo-category h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.demo-category h4 .indicator {
  width: 10px;
  height: 10px;
}

.demo-category h4 .category-score {
  margin-left: auto;
  font-weight: 600;
  color: var(--color-text);
}

/* Overall Score */
.overall-score {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  color: white;
  margin-bottom: 1rem;
}

.overall-score .score-label {
  font-size: 1.125rem;
  font-weight: 500;
}

.overall-score .score-value {
  font-size: 2rem;
  font-weight: 700;
}

.overall-score .score-value.green { color: #4ade80; }
.overall-score .score-value.yellow { color: #fbbf24; }
.overall-score .score-value.red { color: #f87171; }

/* Scorecard Summary */
.scorecard-summary {
  padding: 1rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  margin-top: 1rem;
}

.scorecard-summary p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.scorecard-recommendations {
  padding: 1rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  margin-top: 1rem;
}

.scorecard-recommendations h4 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.scorecard-recommendations ul {
  list-style: none;
  padding: 0;
}

.scorecard-recommendations li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-secondary);
}

.scorecard-recommendations li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.demo-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.demo-metric {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.demo-metric .indicator {
  flex-shrink: 0;
}

.demo-metric-info {
  flex: 1;
  min-width: 0;
}

.demo-metric-name {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.demo-metric-value {
  font-weight: 600;
  font-family: 'SF Mono', Monaco, monospace;
}

/* Loading State */
.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 250px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Error State */
.demo-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 250px;
  color: var(--color-danger);
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* ===================
   Pricing Section
=================== */
.pricing {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.pricing-card {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  margin-bottom: 2rem;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
}

.price-amount {
  font-size: 3rem;
  font-weight: 700;
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.check {
  color: var(--color-success);
  font-weight: bold;
}

.x {
  color: var(--color-text-secondary);
  opacity: 0.5;
}

/* ===================
   Footer
=================== */
.footer {
  background: var(--color-text);
  color: white;
  padding: 4rem 2rem 2rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand .logo-text {
  color: white;
}

.footer-desc {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-column h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-column a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
  transition: var(--transition);
}

.footer-column a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

/* ===================
   Modal
=================== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--color-text);
}

/* Period Selection Modal */
.period-modal-content {
  max-width: 500px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.modal-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.period-modal-selectors {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.period-modal-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.period-modal-select {
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.period-modal-select:hover {
  border-color: var(--color-primary);
}

.period-modal-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.period-modal-vs {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  padding: 0.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.period-modal-error {
  color: var(--color-red);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  min-height: 1.25rem;
}

.period-modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.period-modal-actions .btn {
  min-width: 120px;
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-icon {
  margin-right: 0.5rem;
}

@media (max-width: 480px) {
  .period-modal-selectors {
    flex-direction: column;
  }

  .period-modal-vs {
    padding: 0.25rem 1rem;
  }

  .period-modal-actions {
    flex-direction: column-reverse;
  }

  .period-modal-actions .btn {
    width: 100%;
  }
}

.auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.auth-tab {
  flex: 1;
  padding: 0.75rem;
  border: none;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.auth-tab.active {
  background: var(--color-primary);
  color: white;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
}

.form-group input {
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-error {
  color: var(--color-danger);
  font-size: 0.875rem;
  min-height: 1.25rem;
}

/* ===================
   Dashboard Styles (for logged in users)
=================== */
.dashboard {
  padding: 6rem 2rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.dashboard-title {
  font-size: 1.75rem;
  font-weight: 600;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-plan {
  padding: 0.25rem 0.75rem;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.reports-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.report-card {
  background: var(--color-bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.report-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.report-ticker {
  font-size: 1.25rem;
  font-weight: 600;
}

.report-date {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.report-actions {
  display: flex;
  gap: 0.75rem;
}

/* ===================
   Responsive
=================== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 6rem;
  }

  .hero-subtitle {
    margin: 0 auto 2rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .pricing-card.featured {
    transform: none;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .demo-input-group {
    flex-direction: column;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}