/* ============================================================
   Gaming × Defense — Data Story
   Ventriloc design system · Sky-Blue #0284c7 / #38bdf8
   Fonts loaded via <link> in HTML head.
   ============================================================ */

/* ── Design Tokens — Light ─────────────────────────────── */
:root {
  /* Accent */
  --accent:       #0284c7;
  --accent-light: #38bdf8;
  --accent-dim:   rgba(2, 132, 199, 0.10);

  /* Neutrals */
  --carbon:   #202020;
  --graphite: #4d4d4d;
  --slate:    #828282;
  --fog:      #f5f5f5;
  --mist:     #efefef;
  --chalk:    #e8e8e8;
  --paper:    #ffffff;

  /* Semantic surfaces */
  --canvas:   var(--mist);
  --surface:  var(--paper);
  --inset:    var(--fog);

  /* Semantic text */
  --text-1: var(--carbon);
  --text-2: var(--graphite);
  --text-3: var(--slate);

  /* Fonts */
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body:    'Inter', ui-sans-serif, system-ui, sans-serif;

  /* Elevation */
  --shadow:       0 1px 3px rgba(32, 32, 32, 0.04), 0 4px 12px rgba(32, 32, 32, 0.03);
  --shadow-hover: 0 2px 6px rgba(32, 32, 32, 0.08), 0 8px 24px rgba(32, 32, 32, 0.06);

  /* Border radius */
  --r-card:  8px;
  --r-input: 8px;
  --r-btn:   20px;
  --r-nav:   200px;

  /* Spacing */
  --card-padding: 36px;
  --section-gap:  80px;
  --page-max:     1200px;
  --page-narrow:  760px;
}

/* ── Design Tokens — Dark ──────────────────────────────── */
[data-theme="dark"] {
  --accent:       #38bdf8;
  --accent-light: #7dd3fc;
  --accent-dim:   rgba(56, 189, 248, 0.10);

  --carbon:   #f0f0f0;
  --graphite: #c4c4c4;
  --slate:    #7a7a7a;
  --chalk:    #2e2e2e;
  --fog:      #252525;

  --canvas:  #141414;
  --surface: #1e1e1e;
  --inset:   #252525;

  --text-1: #f0f0f0;
  --text-2: #c4c4c4;
  --text-3: #7a7a7a;

  --shadow:       0 1px 3px rgba(0, 0, 0, 0.40), 0 4px 12px rgba(0, 0, 0, 0.30);
  --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.50), 0 8px 24px rgba(0, 0, 0, 0.40);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.38;
  color: var(--text-1);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  position: relative;
  background: var(--surface);
  border-bottom: 1px solid var(--chalk);
  padding: 80px 24px 72px;
  text-align: center;
}

.hero__eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero__heading {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.5vw, 60px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -1.32px;
  color: var(--text-1);
  max-width: 820px;
  margin: 0 auto 24px;
}

.hero__sub {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.5;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Theme toggle ──────────────────────────────────────── */
.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-btn);
  padding: 7px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s, border-color 0.15s;
}

.theme-toggle:hover {
  border-color: var(--slate);
  background: var(--inset);
}

/* ── Floating nav pill ─────────────────────────────────── */
.nav-pill {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 10px 16px 14px;
  pointer-events: none;
  /* canvas-colored background blocks content in the padding zone */
  background: var(--canvas);
}

.nav-pill__inner {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--chalk);
  border-radius: var(--r-nav);
  padding: 5px 8px;
  box-shadow: 0 1px 4px rgba(32, 32, 32, 0.08), 0 4px 16px rgba(32, 32, 32, 0.07);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  pointer-events: all;
  flex-wrap: wrap;
  justify-content: center;
}

[data-theme="dark"] .nav-pill__inner {
  background: rgba(30, 30, 30, 0.88);
}

.nav-pill__link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--r-btn);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-pill__link:hover {
  background: var(--inset);
  color: var(--text-1);
}

/* ── Page wrappers ─────────────────────────────────────── */
.page-wide {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 24px;
}

.page-narrow {
  max-width: var(--page-narrow);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Story chapter ─────────────────────────────────────── */
.story-chapter {
  padding: var(--section-gap) 0;
  border-bottom: 1px solid var(--chalk);
  scroll-margin-top: 72px; /* clear sticky nav pill */
}

.story-chapter:last-child {
  border-bottom: none;
  padding-bottom: 120px;
}

/* Chapter text intro — narrow column */
.chapter-intro {
  max-width: var(--page-narrow);
  margin: 0 auto 48px;
  padding: 0 24px;
}

.chapter-label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.chapter-heading {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 600;
  line-height: 1.13;
  letter-spacing: -0.8px;
  color: var(--text-1);
  margin-bottom: 16px;
}

.chapter-lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-2);
}

/* ── Forschungsfrage — Quote block ─────────────────────── */
.research-quote {
  border-left: 3px solid var(--accent);
  padding-left: 28px;
}

.research-quote p {
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -0.3px;
  color: var(--text-1);
}

/* ── KPI grid ───────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.kpi-tile {
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.kpi-tile:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.kpi-tile__label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.kpi-tile__value {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.8px;
  color: var(--text-1);
}

.kpi-tile__note {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  margin-top: 8px;
}

/* ── Chart card ────────────────────────────────────────── */
.chart-card {
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: 28px;
  box-shadow: var(--shadow);
}

.chart-card__title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.2px;
  margin-bottom: 20px;
}

.chart-card canvas {
  max-height: 300px;
}

/* ── Chart layout helpers ──────────────────────────────── */
.chart-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

/* ── Callout (inline interpretation) ──────────────────── */
.callout {
  background: var(--inset);
  border: 1px solid var(--chalk);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-card);
  padding: 18px 22px;
  margin-top: 24px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-2);
}

.callout strong {
  color: var(--text-1);
  font-weight: 600;
}

/* ── Detail panel (click-to-reveal) ────────────────────── */
.detail-panel {
  background: var(--inset);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: 24px;
  margin-top: 24px;
}

.detail-panel__heading {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.2px;
  margin-bottom: 6px;
}

.detail-panel__text {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.5;
  margin-bottom: 16px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.detail-metric {
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: 14px 16px;
}

.detail-metric__label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

.detail-metric__value {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.3px;
}

/* ── Interactive explore section ───────────────────────── */
.explore-card {
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: var(--card-padding);
  box-shadow: var(--shadow);
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.filter-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

/* ── Inputs & Selects ──────────────────────────────────── */
select,
input[type="text"] {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-1);
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-input);
  padding: 9px 12px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='7' viewBox='0 0 11 7'%3E%3Cpath d='M1 1l4.5 5L10 1' stroke='%23828282' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

select:focus,
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--r-btn);
  padding: 9px 18px;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
  text-decoration: none;
}

.btn--filled {
  background: var(--carbon);
  color: var(--paper);
  border-color: var(--carbon);
}

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

.btn--outlined {
  background: transparent;
  color: var(--text-1);
  border-color: var(--chalk);
}

.btn--outlined:hover {
  border-color: var(--slate);
  background: var(--inset);
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* ── Explore charts (2×2 grid) ──────────────────────────── */
.explore-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}

/* ── Open answers ───────────────────────────────────────── */
.answers-search {
  margin-bottom: 20px;
}

.answer-list {
  display: grid;
  gap: 10px;
}

.answer-card {
  background: var(--surface);
  border: 1px solid var(--chalk);
  border-radius: var(--r-card);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.answer-card__quote {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-1);
  margin-bottom: 10px;
}

.answer-card__meta {
  font-size: 12px;
  color: var(--text-3);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ── Site footer ────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--chalk);
  padding: 48px 24px;
  text-align: center;
}

.site-footer p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.65;
  margin-bottom: 4px;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .kpi-grid {
    grid-template-columns: 1fr 1fr;
  }

  .chart-duo,
  .explore-charts {
    grid-template-columns: 1fr;
  }

  .filter-row {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .nav-pill__link {
    font-size: 12px;
    padding: 5px 9px;
  }

  .hero {
    padding-top: 72px; /* keep space for absolute toggle */
  }

  .hero__heading {
    font-size: 30px;
    letter-spacing: -0.8px;
  }

  .theme-toggle {
    top: 12px;
    right: 12px;
    padding: 6px 11px;
    font-size: 12px;
  }

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