/* 
 * diBoaS Investor Portal - Responsive CSS
 * Mobile and tablet optimizations
 */

/* ===========================
   MOBILE NAVIGATION
   =========================== */

.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav-overlay.show {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-content {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 300px;
  background: var(--bg-investor-card);
  padding: var(--space-6);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.mobile-nav-overlay.show .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-investor);
}

.mobile-nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--investor-primary);
}

.mobile-nav-close {
  background: none;
  border: none;
  color: var(--text-investor-tertiary);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-base);
  transition: all 0.3s ease;
}

.mobile-nav-close:hover {
  background: var(--bg-investor-hover);
  color: var(--text-investor-primary);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-investor-secondary);
  font-weight: 500;
  transition: all 0.3s ease;
}

.mobile-nav-link:hover {
  background: var(--bg-investor-hover);
  color: var(--investor-primary);
}

.mobile-nav-actions {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-investor);
}

.mobile-nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  background: var(--investor-primary);
  color: white;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.mobile-nav-btn:hover {
  background: var(--investor-dark);
  color: white;
}

/* ===========================
   TABLET BREAKPOINT
   =========================== */

@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .opportunity-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }

  .funding-timeline::before {
    left: var(--space-8);
  }

  .funding-round {
    width: calc(100% - var(--space-16));
    margin-left: var(--space-16) !important;
    margin-right: 0 !important;
  }

  .funding-round::before {
    left: calc(-1 * var(--space-8) - 8px) !important;
    right: auto !important;
  }

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

  .investment-breakdown {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    text-align: center;
  }

  .breakdown-chart {
    order: -1;
  }

  .documents-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }

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

/* ===========================
   MOBILE BREAKPOINT
   =========================== */

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .investor-nav,
  .header-actions .access-btn {
    display: none;
  }

  .header-container {
    padding: var(--space-3) var(--space-4);
  }

  .logo-text {
    display: none;
  }

  .hero-section {
    padding: calc(var(--header-height, 64px) + var(--space-12)) 0 var(--space-12);
    min-height: auto;
  }

  .hero-container {
    padding: 0 var(--space-4);
    gap: var(--space-8);
  }

  .hero-title {
    font-size: clamp(var(--text-2xl), 8vw, var(--text-4xl));
  }

  .hero-subtitle {
    font-size: var(--text-lg);
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-primary,
  .cta-secondary {
    text-align: center;
    min-width: auto;
  }

  .mascot-showcase {
    grid-template-columns: 1fr;
  }

  .progression-flow {
    flex-direction: column;
    gap: var(--space-6);
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .content-section {
    padding: var(--space-16) 0;
  }

  .content-container {
    padding: 0 var(--space-4);
  }

  .section-header {
    margin-bottom: var(--space-12);
  }

  .section-title {
    font-size: clamp(var(--text-2xl), 6vw, var(--text-3xl));
  }

  .section-subtitle {
    font-size: var(--text-lg);
  }

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

  .opportunity-card {
    padding: var(--space-6);
  }

  .opportunity-stats {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .funding-timeline {
    padding: var(--space-6) 0;
  }

  .funding-timeline::before {
    left: var(--space-6);
  }

  .funding-round {
    width: calc(100% - var(--space-12));
    margin-left: var(--space-12) !important;
    padding: var(--space-6);
  }

  .funding-round::before {
    left: calc(-1 * var(--space-6) - 8px) !important;
  }

  .round-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .round-details {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .growth-chart-container {
    padding: var(--space-4);
  }

  .chart-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .chart-canvas {
    height: 250px;
  }

  .investment-breakdown {
    padding: var(--space-6);
  }

  .breakdown-legend {
    gap: var(--space-3);
  }

  .market-indicators {
    grid-template-columns: 1fr;
  }

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

  .document-card {
    padding: var(--space-4);
  }

  .document-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .document-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

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

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

  .footer-legal {
    flex-direction: column;
    gap: var(--space-3);
  }
}

/* ===========================
   SMALL MOBILE BREAKPOINT
   =========================== */

@media (max-width: 480px) {
  .header-container {
    padding: var(--space-2) var(--space-3);
  }

  .hero-container {
    padding: 0 var(--space-3);
  }

  .content-container {
    padding: 0 var(--space-3);
  }

  .hero-metrics {
    padding: var(--space-3);
  }

  .metric-value {
    font-size: var(--text-lg);
  }

  .mascot-card {
    padding: var(--space-3);
  }

  .progression-flow {
    padding: var(--space-4);
  }

  .opportunity-card {
    padding: var(--space-4);
  }

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

  .metric-card {
    padding: var(--space-4);
  }

  .funding-round {
    padding: var(--space-4);
  }

  .round-details {
    gap: var(--space-3);
  }

  .amount-value,
  .valuation-value {
    font-size: var(--text-lg);
  }

  .growth-chart-container,
  .investment-breakdown,
  .market-data-container {
    padding: var(--space-4);
  }

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

  .chart-period-btn {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-2);
  }

  .documents-grid {
    gap: var(--space-4);
  }

  .document-card {
    padding: var(--space-3);
  }

  .mobile-nav-content {
    width: 280px;
    padding: var(--space-4);
  }
}

/* ===========================
   ACCESSIBILITY & FOCUS STATES
   =========================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-investor: #0F172A;
    --bg-investor-secondary: #1E293B;
    --bg-investor-card: #1E293B;
    --bg-investor-hover: #334155;
    --text-investor-primary: #F8FAFC;
    --text-investor-secondary: #CBD5E1;
    --text-investor-tertiary: #94A3B8;
    --border-investor: #334155;
    --border-investor-hover: #475569;
  }
}

/* Focus states for accessibility */
.cta-primary:focus,
.cta-secondary:focus,
.access-btn:focus,
.theme-toggle:focus,
.mobile-menu-btn:focus,
.nav-link:focus,
.mobile-nav-link:focus,
.document-card:focus,
.opportunity-card:focus {
  outline: 2px solid var(--investor-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .investor-header {
    border-bottom-width: 2px;
  }
  
  .document-card,
  .opportunity-card,
  .metric-card {
    border-width: 2px;
  }
  
  .cta-primary,
  .cta-secondary,
  .access-btn {
    border-width: 2px;
  }
}