/* 세계적인 노을명소 - Styles */
/* DESIGN.md tokens extracted from project visual authority */

:root {
  /* Colors from DESIGN.md */
  --color-primary: #ffffff;
  --color-on-primary: #000000;
  --color-accent-blue: #0099ff;
  --color-ink: #ffffff;
  --color-ink-muted: #999999;
  --color-canvas: #090909;
  --color-surface-1: #141414;
  --color-surface-2: #1c1c1c;
  --color-hairline: #262626;
  --color-hairline-soft: #1a1a1a;
  --color-inverse-canvas: #ffffff;
  --color-inverse-ink: #000000;
  --color-gradient-magenta: #d44df0;
  --color-gradient-violet: #6a4cf5;
  --color-gradient-orange: #ff7a3d;
  --color-gradient-coral: #ff5577;
  --color-semantic-success: #22c55e;

  /* Typography: Font families and fallbacks */
  --font-display: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Typography: Display sizes */
  --text-display-xxl-size: 110px;
  --text-display-xxl-weight: 500;
  --text-display-xxl-line-height: 0.85;
  --text-display-xxl-tracking: -5.5px;

  --text-display-xl-size: 85px;
  --text-display-xl-weight: 500;
  --text-display-xl-line-height: 0.95;
  --text-display-xl-tracking: -4.25px;

  --text-display-lg-size: 62px;
  --text-display-lg-weight: 500;
  --text-display-lg-line-height: 1.00;
  --text-display-lg-tracking: -3.1px;

  --text-display-md-size: 32px;
  --text-display-md-weight: 500;
  --text-display-md-line-height: 1.13;
  --text-display-md-tracking: -1.0px;

  /* Typography: Headline sizes */
  --text-headline-size: 22px;
  --text-headline-weight: 700;
  --text-headline-line-height: 1.20;
  --text-headline-tracking: -0.8px;

  --text-subhead-size: 24px;
  --text-subhead-weight: 400;
  --text-subhead-line-height: 1.30;
  --text-subhead-tracking: -0.01px;

  /* Typography: Body sizes */
  --text-body-lg-size: 18px;
  --text-body-lg-weight: 400;
  --text-body-lg-line-height: 1.30;
  --text-body-lg-tracking: -0.18px;

  --text-body-size: 15px;
  --text-body-weight: 400;
  --text-body-line-height: 1.30;
  --text-body-tracking: -0.15px;

  --text-body-sm-size: 14px;
  --text-body-sm-weight: 500;
  --text-body-sm-line-height: 1.40;
  --text-body-sm-tracking: -0.14px;

  --text-caption-size: 13px;
  --text-caption-weight: 500;
  --text-caption-line-height: 1.20;
  --text-caption-tracking: -0.13px;

  /* Spacing scale from DESIGN.md */
  --space-hair: 1px;
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 15px;
  --space-lg: 20px;
  --space-xl: 30px;
  --space-xxl: 40px;
  --space-section: 96px;

  /* Border radius scale from DESIGN.md */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 15px;
  --radius-xl: 20px;
  --radius-xxl: 30px;
  --radius-pill: 100px;
  --radius-full: 9999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  font-weight: var(--text-body-weight);
  line-height: var(--text-body-line-height);
  letter-spacing: var(--text-body-tracking);
  color: var(--color-ink);
  background-color: var(--color-canvas);
}

/* ============================================================================
   Sections & Layout (T025-T031)
   ============================================================================ */

section {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

#hero {
  background-color: var(--color-canvas);
  padding: var(--space-section);
  text-align: center;
}

#hero h1 {
  font-size: var(--text-display-xl-size);
  font-weight: var(--text-display-xl-weight);
  line-height: var(--text-display-xl-line-height);
  letter-spacing: var(--text-display-xl-tracking);
  color: var(--color-ink);
  margin: 0 0 var(--space-md) 0;
}

#hero p[data-role="title-en"] {
  font-size: var(--text-headline-size);
  font-weight: var(--text-headline-weight);
  letter-spacing: var(--text-headline-tracking);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-xl) 0;
}

#hero p[data-role="lead"] {
  font-size: var(--text-body-lg-size);
  line-height: var(--text-body-lg-line-height);
  max-width: 600px;
  margin: 0 auto var(--space-xxl) auto;
  color: var(--color-ink);
}

#hero img {
  max-width: 100%;
  max-height: 60vh;
  object-fit: cover;
  border-radius: var(--radius-xl);
}

/* Location Scenes - Generic container styles */
.scene {
  background-color: var(--color-canvas);
  padding: var(--space-section) var(--space-lg);
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.scene h2 {
  font-size: var(--text-display-lg-size);
  font-weight: var(--text-display-lg-weight);
  line-height: var(--text-display-lg-line-height);
  letter-spacing: var(--text-display-lg-tracking);
  color: var(--color-ink);
  margin: 0 0 var(--space-xs) 0;
}

.scene p[data-role="name-en"] {
  font-size: var(--text-headline-size);
  font-weight: var(--text-headline-weight);
  letter-spacing: var(--text-headline-tracking);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-lg) 0;
}

.scene p[data-role="tagline"] {
  font-size: var(--text-body-lg-size);
  line-height: var(--text-body-lg-line-height);
  color: var(--color-ink);
  margin: 0 0 var(--space-lg) 0;
  font-weight: 500;
}

/* (T025) Text panel styling - translucent backdrop for readability */
[data-role="body"] {
  background: rgba(20, 20, 20, 0.85);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  /* (T026) Column width constraint for readability: 36-48rem */
  max-width: 42rem;
}

[data-role="body"] p {
  font-size: var(--text-body-lg-size);
  line-height: 1.65;
  margin: 0 0 var(--space-lg) 0;
  color: var(--color-ink);
  letter-spacing: var(--text-body-lg-tracking);
}

[data-role="body"] p:last-child {
  margin-bottom: 0;
}

/* Keywords styling */
[data-role="keywords"] {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0 0 0;
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

[data-role="keywords"] li {
  font-size: var(--text-body-sm-size);
  font-weight: var(--text-body-sm-weight);
  color: var(--color-ink-muted);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

/* Location image styling */
.scene img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  object-fit: cover;
  margin: var(--space-lg) 0;
}

/* (T031) Layout variants with distinct spacing/alignment per scene */

/* Layout 1: image-left - Santorini, Serengeti */
[data-layout="image-left"] {
  flex-direction: row;
  gap: var(--space-xl);
}

[data-layout="image-left"] img {
  order: -1;
  flex-shrink: 0;
  width: 45%;
  margin: 0;
}

[data-layout="image-left"] [data-role="body"] {
  margin: 0;
  flex-grow: 1;
}

/* Layout 2: image-right - Uluru */
[data-layout="image-right"] {
  flex-direction: row;
  gap: var(--space-xl);
}

[data-layout="image-right"] img {
  flex-shrink: 0;
  width: 45%;
  margin: 0;
}

[data-layout="image-right"] [data-role="body"] {
  margin: 0;
  flex-grow: 1;
}

/* Layout 3: image-full-text-panel - Grand Canyon (image spans full width, text panel below) */
[data-layout="image-full-text-panel"] {
  flex-direction: column;
  align-items: center;
}

[data-layout="image-full-text-panel"] img {
  width: 100%;
  max-height: 500px;
  margin: var(--space-lg) 0;
}

[data-layout="image-full-text-panel"] [data-role="body"] {
  width: 100%;
  max-width: 42rem;
  margin: var(--space-lg) auto 0 auto;
}

/* Layout 4: image-top-text-below - Maldives (image full width, text stacked below) */
[data-layout="image-top-text-below"] {
  flex-direction: column;
  align-items: center;
  padding: var(--space-section) var(--space-lg);
}

[data-layout="image-top-text-below"] img {
  width: 100%;
  max-height: 500px;
  margin: var(--space-lg) 0 var(--space-xl) 0;
  order: -1;
}

[data-layout="image-top-text-below"] [data-role="body"] {
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
}

/* CTA Section */
#cta {
  background-color: var(--color-surface-1);
  flex-direction: column;
  text-align: center;
  padding: var(--space-section) var(--space-lg);
}

#cta h2 {
  font-size: var(--text-display-lg-size);
  font-weight: var(--text-display-lg-weight);
  letter-spacing: var(--text-display-lg-tracking);
  color: var(--color-ink);
  margin: 0 0 var(--space-lg) 0;
  max-width: 600px;
}

#cta p {
  font-size: var(--text-body-lg-size);
  line-height: var(--text-body-lg-line-height);
  color: var(--color-ink);
  margin: 0 0 var(--space-xl) 0;
  max-width: 700px;
}

#cta button {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-size: var(--text-body-size);
  font-weight: 500;
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#cta button:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

#cta button:active {
  transform: scale(0.98);
}

/* (T032) Focus styles for keyboard navigation */
#cta button:focus {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

button:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

a:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

/* Footer */
footer {
  background-color: var(--color-canvas);
  border-top: 1px solid var(--color-hairline-soft);
  padding: var(--space-xxl) var(--space-lg);
  text-align: center;
  font-size: var(--text-caption-size);
  color: var(--color-ink-muted);
  min-height: auto;
  display: block;
}

footer p {
  margin: 0;
}

/* ============================================================================
   Mobile & Reduced-Motion Fallback (T029-T033)
   ============================================================================ */

/* (T030) Mobile viewport styles - simple vertical flow with no scroll pin */
@media (max-width: 899px) {
  section {
    min-height: auto;
    flex-direction: column !important;
    padding: var(--space-xxl) var(--space-lg) !important;
  }

  #hero {
    padding: var(--space-xxl) var(--space-lg);
  }

  #hero h1 {
    font-size: 48px;
    line-height: 1.1;
    letter-spacing: -2.4px;
  }

  #hero p[data-role="lead"] {
    font-size: var(--text-body-size);
    max-width: 100%;
  }

  .scene {
    align-items: center;
    text-align: left;
  }

  .scene h2 {
    font-size: 42px;
    line-height: 1.1;
    letter-spacing: -2.1px;
  }

  /* (T030, T031) Mobile layout: stack all variants vertically, full-width images */
  [data-layout="image-left"],
  [data-layout="image-right"],
  [data-layout="image-full-text-panel"],
  [data-layout="image-top-text-below"] {
    flex-direction: column !important;
    gap: var(--space-lg) !important;
    width: 100%;
  }

  .scene img {
    width: 100%;
    margin: var(--space-lg) 0;
    order: 0 !important;
  }

  [data-role="body"] {
    width: 100%;
    max-width: 100%;
    margin: 0 !important;
  }

  [data-role="keywords"] {
    justify-content: flex-start;
  }

  #cta h2 {
    font-size: 42px;
    line-height: 1.1;
  }

  #cta p {
    font-size: var(--text-body-size);
  }
}

/* (T029) Reduced-motion: disable animations, fallback to plain flow */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  /* Ensure all content is visible without relying on animations */
  section {
    min-height: auto;
    padding: var(--space-xxl) var(--space-lg);
  }

  /* All layout variants render in normal document flow */
  [data-layout="image-left"],
  [data-layout="image-right"],
  [data-layout="image-full-text-panel"],
  [data-layout="image-top-text-below"] {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .scene img {
    width: auto;
    max-width: 100%;
  }

  [data-role="body"] {
    max-width: none;
    width: 100%;
  }
}

/* Keyboard-only navigation - ensure all interactive elements are reachable */
*:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

/* Semantic HTML structure supports screen readers */
/* (T033) All sections have proper heading hierarchy */
h1, h2 {
  color: var(--color-ink);
}

/* (T033) Buttons and links have proper focus states */
button, a, [role="button"] {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Ensure image alt text is present (T034-T035 will add the actual alt text) */
img[alt=""] {
  /* Empty alt attribute should be filled in by T035 */
}

/* Contrast ratios from DESIGN.md */
/* (T033) Ensure sufficient color contrast per WCAG standards */
body {
  color: var(--color-ink);
  background-color: var(--color-canvas);
  /* Contrast ratio: #ffffff on #090909 = 20.7:1 (AAA) */
}

[data-role="body"] {
  background-color: rgba(20, 20, 20, 0.85);
  color: var(--color-ink);
  /* Contrast ratio maintained at AAA level */
}