/* ============================================================
   CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
  --color-primary: #0054A6;
  --color-primary-light: #1A6FBF;
  --color-accent: #FFD100;
  --color-bg: #F5F7FA;
  --color-bg-white: #FFFFFF;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;

  --marker-size: 28px;
  --marker-size-mobile: 34px;
  --marker-font: 11px;
  --marker-font-mobile: 13px;

  --tooltip-max-width: 380px;
  --tooltip-radius: 8px;
  --tooltip-arrow-size: 8px;

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.2);

  --transition-speed: 0.2s;

  --z-marker: 10;
  --z-marker-active: 20;
  --z-tooltip: 30;
  --z-modal-overlay: 100;
  --z-modal: 101;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  overflow-x: hidden;
}

body.modal-open {
  overflow: hidden;
}

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

/* ============================================================
   Header
   ============================================================ */
.site-header {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
  padding: 12px 24px;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.header-logo {
  flex-shrink: 0;
}

.header-logo-img {
  height: 60px;
  width: auto;
  display: block;
}

.header-text {
  min-width: 0;
}

.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.site-subtitle {
  font-size: 0.9rem;
  font-weight: 400;
  opacity: 0.85;
  margin-top: 2px;
}

@media (max-width: 767px) {
   .header-inner {
     gap: 14px;
   }

   .header-logo-img {
     height: 48px;
   }

   .site-title {
     font-size: 0.8rem;
   }

   .site-subtitle {
      font-size: 0.8rem;
   }
}
/* ============================================================
   Main Content
   ============================================================ */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
}

.instructions {
  text-align: center;
  margin-bottom: 12px;
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* Show/hide instructions based on viewport */
.instructions-mobile { display: none; }
.instructions-desktop { display: inline; }

@media (max-width: 767px) {
  .instructions-mobile { display: inline; }
  .instructions-desktop { display: none; }
}

/* ============================================================
   Map Container
   ============================================================ */
.map-container {
  position: relative;
  width: 100%;
  line-height: 0;
  background-color: var(--color-bg-white);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.race-map-img {
  width: 100%;
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* ============================================================
   Station Markers
   ============================================================ */
.station-marker {
  position: absolute;
  width: var(--marker-size);
  height: var(--marker-size);
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-bg-white);
  border: 2px solid var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  font-size: var(--marker-font);
  font-weight: 700;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transform: translate(-50%, -50%);
  z-index: var(--z-marker);
  transition: transform var(--transition-speed) ease,
              background-color var(--transition-speed) ease,
              box-shadow var(--transition-speed) ease;
  /* Remove default button styles */
  padding: 0;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.station-marker:hover,
.station-marker.active {
  background-color: var(--color-primary-light);
  transform: translate(-50%, -50%) scale(1.2);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-marker-active);
}

.station-marker:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  z-index: var(--z-marker-active);
}

@media (max-width: 767px) {
  .station-marker {
    width: var(--marker-size-mobile);
    height: var(--marker-size-mobile);
    font-size: var(--marker-font-mobile);
  }
}

/* ============================================================
   Download Button (shared tooltip + modal)
   ============================================================ */
.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  color: var(--color-primary);
  background: transparent;
  text-decoration: none;
  flex-shrink: 0;
  transition: background-color var(--transition-speed) ease,
              color var(--transition-speed) ease;
}

.btn-download:hover {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

.btn-download:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-download i {
  font-size: 14px;
  line-height: 1;
}

/* ============================================================
   Desktop Tooltip
   ============================================================ */
.tooltip {
  position: absolute;
  width: var(--tooltip-max-width);
  max-width: 90vw;
  background: var(--color-bg-white);
  border-radius: var(--tooltip-radius);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-speed) ease,
              visibility var(--transition-speed) ease;
}

.tooltip.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.tooltip-header {
  padding: 10px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  border-bottom: 3px solid var(--color-primary);
  border-radius: var(--tooltip-radius) var(--tooltip-radius) 0 0;
  background-color: #F0F6FC;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.tooltip-title {
  flex: 1;
  min-width: 0;
}

.tooltip-body {
  padding: 12px 14px;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.tooltip-img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.tooltip-fallback,
.modal-fallback {
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
  padding: 20px 0;
}

/* Tooltip Arrow */
.tooltip-arrow {
  position: absolute;
  width: 0;
  height: 0;
  border: var(--tooltip-arrow-size) solid transparent;
}

/* Arrow pointing down (tooltip above marker) */
.tooltip.pos-above .tooltip-arrow {
  bottom: calc(-1 * var(--tooltip-arrow-size) * 2);
  left: 50%;
  transform: translateX(-50%);
  border-top-color: var(--color-bg-white);
}

/* Arrow pointing up (tooltip below marker) */
.tooltip.pos-below .tooltip-arrow {
  top: calc(-1 * var(--tooltip-arrow-size) * 2);
  left: 50%;
  transform: translateX(-50%);
  border-bottom-color: #F0F6FC;
}

/* Arrow pointing right (tooltip left of marker) */
.tooltip.pos-left .tooltip-arrow {
  right: calc(-1 * var(--tooltip-arrow-size) * 2);
  top: 20px;
  border-left-color: var(--color-bg-white);
}

/* Arrow pointing left (tooltip right of marker) */
.tooltip.pos-right .tooltip-arrow {
  left: calc(-1 * var(--tooltip-arrow-size) * 2);
  top: 20px;
  border-right-color: #F0F6FC;
}

/* Hide tooltip on mobile */
@media (max-width: 767px) {
  .tooltip {
    display: none !important;
  }
}

/* ============================================================
   Loading Spinner
   ============================================================ */
.tooltip-spinner,
.modal-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.tooltip-spinner.hidden,
.modal-spinner.hidden {
  display: none;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid #E0E0E0;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   Mobile Modal
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: var(--z-modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg-white);
  width: 90vw;
  max-width: 500px;
  max-height: 85vh;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  z-index: var(--z-modal);
  transform: translateY(20px);
  transition: transform 0.25s ease;
}

.modal-overlay.visible .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 3px solid var(--color-primary);
  background-color: #F0F6FC;
  flex-shrink: 0;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color var(--transition-speed) ease;
}

.modal-close:hover {
  background-color: #E0E0E0;
}

.modal-close:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.modal-body {
  padding: 16px 18px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

.modal-img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.modal-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

/* Hide modal trigger on desktop (modals are mobile-only) */
@media (min-width: 768px) {
  .modal-overlay {
    display: none !important;
  }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 16px 24px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid #E0E0E0;
  margin-top: 24px;
}

/* ============================================================
   Utility
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}