/* ChiVoyage - Swiss Metro / Editorial Divider Design System */
/* Unified Flat Background (White / Pure Black), 1px Crisp Dividers, No Boxed Containers */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,100..700;1,100..700&display=swap');

:root {
  --bg: #000000;
  --bg-subtle: #000000;
  --bg-code: #0a0a0a;
  --bg-appbar: #000000;
  --bg-modal: #000000;

  --border: #333333;
  --border-strong: #ffffff;

  --fg: #ffffff;
  --fg-subtle: #b0b0b0;
  --fg-muted: #808080;
  --code-fg: #00bcf2;

  /* Authentic Nokia Lumia Palette Constants */
  --lumia-cyan: #00bcf2;
  --lumia-yellow: #fff100;
  --lumia-magenta: #e81123;
  --lumia-orange: #f7630c;
  --lumia-green: #107c10;
  --lumia-purple: #881798;
  --lumia-lime: #a4c400;

  --accent: #00bcf2;

  /* Palette Variants */
  --accent-cyan: #00bcf2;
  --accent-emerald: #107c10;
  --accent-amber: #f7630c;
  --accent-crimson: #e81123;
  --accent-purple: #881798;

  --font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --ease-metro: cubic-bezier(0.1, 0.9, 0.2, 1.0);
}

/* Lumia Single-Color Rotation: 60s (5x slower), vibrant hold plateaus */
@keyframes lumiaBgShift {
  0%, 16% {
    background-color: #00bcf2; /* Lumia Cyan */
    color: #000000;
  }
  20%, 36% {
    background-color: #fff100; /* Lumia Pure Yellow */
    color: #000000;
  }
  40%, 56% {
    background-color: #e81123; /* Lumia Crimson Red */
    color: #ffffff;
  }
  60%, 76% {
    background-color: #f7630c; /* Lumia Amber Orange */
    color: #000000;
  }
  80%, 96% {
    background-color: #107c10; /* Lumia Vibrant Green */
    color: #ffffff;
  }
  100% {
    background-color: #00bcf2;
    color: #000000;
  }
}

@keyframes lumiaTextShift {
  0%, 16% {
    color: #00bcf2;
  }
  20%, 36% {
    color: #fff100;
  }
  40%, 56% {
    color: #e81123;
  }
  60%, 76% {
    color: #f7630c;
  }
  80%, 96% {
    color: #107c10;
  }
  100% {
    color: #00bcf2;
  }
}

@keyframes lumiaBorderShift {
  0%, 16% {
    border-color: #00bcf2;
  }
  20%, 36% {
    border-color: #fff100;
  }
  40%, 56% {
    border-color: #e81123;
  }
  60%, 76% {
    border-color: #f7630c;
  }
  80%, 96% {
    border-color: #107c10;
  }
  100% {
    border-color: #00bcf2;
  }
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-subtle: #ffffff;
  --bg-code: #f6f6f6;
  --bg-appbar: #ffffff;
  --bg-modal: #ffffff;

  --border: #cccccc;
  --border-strong: #000000;

  --fg: #000000;
  --fg-subtle: #333333;
  --fg-muted: #666666;
  --code-fg: #005a9e;
}

[data-contrast="high"] {
  --bg: #000000;
  --bg-subtle: #000000;
  --bg-code: #000000;
  --bg-appbar: #000000;
  --bg-modal: #000000;
  --border: #ffffff;
  --border-strong: #ffffff;
  --fg: #ffffff;
  --fg-subtle: #ffffaa;
  --accent: #ffff00;
  --code-fg: #ffff00;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
  /* Zero roundness */
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-family);
  min-height: 100vh;
  overflow-x: hidden;
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: -0.01em;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* Metro App Shell & Panorama */
.metro-viewport {
  max-width: 1440px;
  margin: 0 auto;
  padding: 3rem 3.5rem 7rem 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

@media (max-width: 768px) {
  .metro-viewport {
    padding: 1.5rem 1.25rem 6rem 1.25rem;
    gap: 1.5rem;
  }
}

/* Panoramic Header with Divider Underneath */
.metro-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.75rem;
}

.brand-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  animation: lumiaTextShift 60s ease infinite;
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  filter: invert(1);
  transition: filter 0.15s ease;
}

[data-theme="light"] .brand-logo {
  filter: invert(0);
}

.brand-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1;
}

/* Horizontal Panorama Pivot Tabs */
.metro-pivot {
  display: flex;
  align-items: baseline;
  gap: 1.75rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 0.25rem;
  margin-top: 1rem;
}

.metro-pivot::-webkit-scrollbar {
  display: none;
}

.pivot-item {
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: var(--font-family);
  font-size: clamp(0.95rem, 1.7vw, 1.35rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s var(--ease-metro);
  text-align: left;
}

.pivot-item:hover {
  color: var(--fg-subtle);
}

.pivot-item.active {
  color: var(--fg);
  font-weight: 500;
  border-bottom: 3px solid #00bcf2;
  animation: lumiaBorderShift 60s ease infinite;
  padding-bottom: 4px;
}

/* Metro Content Views with Turnstile Animation */
.metro-view {
  display: none;
  opacity: 0;
  transform: translateX(35px);
}

.metro-view.active {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  animation: turnstileIn 0.35s var(--ease-metro) forwards;
}

@keyframes turnstileIn {
  0% {
    opacity: 0;
    transform: translateX(40px);
  }

  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Two-Column Grid: Divider-Based Architecture */
.metro-grid-split {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 3rem;
  align-items: start;
}

/* Left Sidebar: Crisp 1px Right Divider */
.metro-grid-split>*:first-child {
  border-right: 1px solid var(--border);
  padding-right: 3rem;
}

@media (max-width: 1024px) {
  .metro-grid-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .metro-grid-split>*:first-child {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-right: 0;
    padding-bottom: 2.5rem;
  }
}

/* Metro Section Layout (No Box Container, Pure Transparent Surface) */
.metro-tile {
  background: transparent !important;
  /* No card background */
  border: none !important;
  /* No box border */
  padding: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
}

.metro-tile-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.85rem;
}

.tile-title {
  font-size: 1.5rem;
  font-weight: 200;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.tile-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
}

/* Grid for Places & Cards: Separated by Dividers */
.metro-tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.metro-tile-grid .metro-tile {
  border-bottom: 1px solid var(--border) !important;
  padding-bottom: 1.5rem !important;
}

/* Metro Typography */
h3.section-heading {
  font-size: 1.5rem;
  font-weight: 200;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

p.subtle-text {
  font-size: 0.95rem;
  color: var(--fg-subtle);
  line-height: 1.6;
}

/* Metro Form Fields */
.metro-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.metro-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-subtle);
}

.metro-input,
textarea.metro-input {
  background: var(--bg);
  border: 1.5px solid var(--border-strong);
  color: var(--fg);
  padding: 0.75rem 1rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 500;
  outline: none;
  box-shadow: none;
  border-radius: 0 !important;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  width: 100%;
}

select.metro-input {
  background: var(--bg);
  border: 1.5px solid var(--border-strong);
  color: var(--fg);
  padding: 0.75rem 3.5rem 0.75rem 1rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 500;
  outline: none;
  box-shadow: none;
  border-radius: 0 !important;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='3'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: calc(100% - 1.25rem) center;
  background-size: 16px 16px;
  cursor: pointer;
}

[data-theme="light"] select.metro-input {
  border-color: #000000;
  color: #000000;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000000' stroke-width='3'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

[data-theme="light"] .metro-input,
[data-theme="light"] textarea.metro-input {
  border-color: #000000;
  color: #000000;
}

select.metro-input option {
  background: var(--bg);
  color: var(--fg);
}

.metro-input:focus,
select.metro-input:focus,
textarea.metro-input:focus {
  outline: none !important;
  border-color: var(--grad-1) !important;
  box-shadow: 0 0 0 1px var(--grad-1);
}

/* Metro Action Buttons */
.metro-btn {
  background-color: #00bcf2;
  animation: lumiaBgShift 60s ease infinite;
  color: #000000;
  border: none;
  padding: 0.85rem 1.6rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  transition: transform 0.1s ease, filter 0.15s ease;
}

.metro-btn:hover {
  filter: brightness(1.15);
}

.metro-btn:active {
  transform: perspective(400px) scale(0.98);
}

.metro-btn-secondary {
  background: transparent !important;
  animation: none !important;
  color: var(--fg) !important;
  border: 2px solid var(--border-strong);
}

.metro-btn-secondary:hover {
  border-color: var(--fg);
  background: rgba(128, 128, 128, 0.08) !important;
}

.metro-btn-emergency {
  background: var(--accent-crimson) !important;
  animation: none !important;
  color: #ffffff !important;
}

.metro-btn-claude {
  background: var(--accent-purple) !important;
  animation: none !important;
  color: #ffffff !important;
}

/* Preset Chips */
.metro-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.metro-chip {
  background: transparent;
  border: 2px solid var(--border-strong);
  color: var(--fg-subtle);
  padding: 0.45rem 0.9rem;
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.metro-chip:hover {
  color: var(--fg);
  border-color: var(--fg);
}

.metro-chip.active {
  background-color: #00bcf2;
  animation: lumiaBgShift 60s ease infinite;
  border-color: transparent;
  font-weight: 700;
}

/* Transit Alert Strip (Divider Based) */
.metro-alert-strip {
  background: transparent;
  border: none;
  border-left: 4px solid var(--accent-amber);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.metro-alert-strip.ok {
  border-left-color: var(--accent-emerald);
}

/* MapLibre 3D Globe Frame */
#map {
  width: 100%;
  height: 440px;
  background: var(--bg);
  border: 1px solid var(--border);
  position: relative;
}

.metro-marker {
  width: 14px;
  height: 14px;
  border: 2px solid var(--fg);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.metro-marker:hover {
  transform: scale(1.4);
}

.maplibregl-popup-content {
  background: var(--bg) !important;
  color: var(--fg) !important;
  border: 1px solid var(--border-strong) !important;
  border-radius: 0 !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4) !important;
  padding: 1.25rem !important;
  font-family: var(--font-family) !important;
}

.maplibregl-popup-close-button {
  color: var(--fg) !important;
  font-size: 18px !important;
  padding: 4px 8px !important;
}

.maplibregl-ctrl-group {
  background: var(--bg) !important;
  border: 1px solid var(--border) !important;
  border-radius: 0 !important;
}

.maplibregl-ctrl-group button {
  border-radius: 0 !important;
  border-bottom: 1px solid var(--border) !important;
}

/* Metro Timeline */
.metro-timeline {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  border-left: 1px solid var(--border);
  padding-left: 2rem;
  margin-left: 0.5rem;
}

.metro-stop {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}

.metro-stop::before {
  content: "";
  position: absolute;
  left: -2.35rem;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

.stop-headline {
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--fg);
}

.stop-meta-line {
  font-size: 0.8rem;
  color: var(--fg-subtle);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stop-access-line {
  font-size: 0.9rem;
  color: var(--accent-cyan);
}

/* Speech Microcard */
.metro-phrase-card {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
}

.audio-circle-btn {
  width: 42px;
  height: 42px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.audio-circle-btn:hover {
  background: var(--accent);
  color: #ffffff;
}

/* Windows Phone Bottom App Bar */
.metro-appbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  z-index: 999;
}

.appbar-actions {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.appbar-btn {
  background: transparent;
  border: none;
  color: var(--fg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  font-family: var(--font-family);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  cursor: pointer;
}

.appbar-icon {
  width: 32px;
  height: 32px;
  border: 1px solid var(--fg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all 0.12s ease;
}

.appbar-btn:hover .appbar-icon {
  background: var(--fg);
  color: var(--bg);
}

/* Metro Modal Dialog */
.metro-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.metro-modal.active {
  display: flex;
}

.metro-modal-box {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--fg);
  max-width: 680px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  animation: turnstileIn 0.3s var(--ease-metro);
}

/* Checklist Checkboxes */
.metro-check {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  color: var(--fg);
}

.metro-check input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-strong);
  background: transparent;
  cursor: pointer;
  display: grid;
  place-content: center;
  transition: border-color 0.15s ease;
}

.metro-check input[type="checkbox"]:checked {
  border-color: var(--accent);
  background: var(--accent);
}

.metro-check input[type="checkbox"]:checked::before {
  content: "✔";
  font-size: 11px;
  color: #ffffff;
}

/* Code Pre Blocks */
pre.metro-code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 1.25rem;
  color: var(--code-fg);
  font-family: Consolas, monospace;
  font-size: 0.82rem;
  max-height: 380px;
  overflow-x: auto;
}

/* Editorial Neighborhood Guides Typography & Spacing */
.seo-guide-wrapper {
  max-width: 920px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.seo-meta-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.2rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.seo-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.seo-meta-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.seo-meta-value {
  font-size: 0.95rem;
  color: var(--fg);
}

.seo-guide {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.seo-guide h1 {
  font-size: clamp(2.6rem, 5.5vw, 4rem);
  font-weight: 200;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--fg);
}

.seo-guide p.lead {
  font-size: 1.3rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--fg);
  border-left: 3px solid var(--accent);
  padding-left: 1.75rem;
  margin: 1.5rem 0;
}

.seo-guide h2 {
  font-size: 1.8rem;
  font-weight: 200;
  letter-spacing: -0.03em;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-top: 2.5rem;
}

.seo-guide p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--fg-subtle);
}

.seo-guide ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 1.5rem 0;
}

.seo-guide ol li {
  position: relative;
  padding-left: 2.5rem;
  border-left: 2px solid var(--border);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--fg);
}

.seo-guide ol li strong {
  color: var(--accent);
  display: block;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}