/* ==========================================================================
   Yoake Mae yori Ruriiro na - Guide Stylesheet
   Palette: Lapis Lazuli Twilight (#152042), Dawn Gold (#c89b3c), Moonlit Ivory (#faf8f2)
   ========================================================================== */

:root {
  --lapis-deep: #121b38;
  --lapis-main: #1b2a54;
  --lapis-mid: #273b73;
  --lapis-soft: #eef2fa;
  --dawn-gold: #c89b3c;
  --dawn-gold-bright: #e2b857;
  --dawn-gold-pale: #fdf8eb;
  --moon-ivory: #faf8f2;
  --paper-white: #ffffff;
  --ink-main: #1e222e;
  --ink-muted: #52586a;
  --rule-light: #d8d4c8;
  --rule-mid: #b3ae9e;
  --crimson-warn: #7e252e;
  --crimson-pale: #fbf2f3;
  --emerald-ok: #1e5942;
  --emerald-pale: #eef7f3;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--moon-ivory);
  color: var(--ink-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

a {
  color: var(--lapis-mid);
  text-decoration: none;
}

a:hover {
  color: #8f6714;
  text-decoration: underline;
}

/* Masthead & Navigation */
.dawn-masthead {
  background-color: var(--lapis-deep);
  color: #f4f1e8;
  border-bottom: 3px solid var(--dawn-gold);
}

.masthead-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 20px 0;
}

.masthead-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(200, 155, 60, 0.3);
}

.brand-group {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
}

.repo-back {
  color: #d4cbb8;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid rgba(212, 203, 184, 0.35);
  padding: 2px 8px;
}

.repo-back:hover {
  color: #ffffff;
  border-color: var(--dawn-gold-bright);
  text-decoration: none;
}

.guide-brand {
  color: #ffffff;
  font-family: Georgia, "Times New Roman", "Noto Serif JP", serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.guide-brand:hover {
  color: var(--dawn-gold-bright);
  text-decoration: none;
}

.guide-platform {
  font-size: 0.82rem;
  color: var(--dawn-gold-bright);
  letter-spacing: 0.03em;
}

.guide-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  padding: 8px 0 10px;
  font-size: 0.86rem;
}

.guide-nav a {
  color: #d7ddef;
  padding: 3px 0;
  border-bottom: 2px solid transparent;
}

.guide-nav a:hover {
  color: var(--dawn-gold-bright);
  text-decoration: none;
}

.guide-nav a.active {
  color: #ffffff;
  font-weight: 600;
  border-bottom-color: var(--dawn-gold-bright);
}

/* Main Sheet */
.prima-sheet {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 72px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--lapis-main);
}

.page-header h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Noto Serif JP", serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--lapis-deep);
}

.lead-intro {
  font-size: 0.98rem;
  color: var(--ink-main);
  margin: 0 0 14px;
}

.section-header {
  margin: 28px 0 10px;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--dawn-gold);
  font-family: Georgia, "Times New Roman", "Noto Serif JP", serif;
  font-size: 1.24rem;
  color: var(--lapis-deep);
}

.section-intro {
  margin: 0 0 14px;
  color: var(--ink-main);
}

/* Table of Contents */
.toc-box {
  background-color: var(--paper-white);
  border: 1px solid var(--rule-mid);
  border-top: 3px solid var(--lapis-main);
  padding: 12px 16px;
  margin-bottom: 22px;
}

.toc-title {
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--lapis-main);
  margin-bottom: 6px;
}

.toc-list {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
  font-size: 0.9rem;
}

/* Progress Bar */
.progress-banner {
  background-color: var(--paper-white);
  border: 1px solid var(--rule-mid);
  border-top: 3px solid var(--dawn-gold);
  padding: 10px 14px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.progress-text {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--lapis-deep);
}

.progress-track {
  flex: 1 1 200px;
  height: 10px;
  background-color: #e6e3d8;
  border: 1px solid var(--rule-mid);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background-color: var(--lapis-main);
  transition: width 0.2s ease;
}

.progress-reset {
  background: transparent;
  border: 1px solid var(--rule-mid);
  color: var(--ink-muted);
  font-size: 0.78rem;
  padding: 3px 9px;
  cursor: pointer;
}

.progress-reset:hover {
  border-color: var(--crimson-warn);
  color: var(--crimson-warn);
}

/* Panels (Top/Bottom Bordered, Never Left-Border Callouts) */
.spec-panel {
  background-color: var(--paper-white);
  border: 1px solid var(--rule-mid);
  border-top: 3px solid var(--lapis-main);
  margin: 16px 0;
}

.spec-panel-gold {
  border-top-color: var(--dawn-gold);
  background-color: var(--dawn-gold-pale);
}

.spec-panel-crimson {
  border-top-color: var(--crimson-warn);
  background-color: var(--crimson-pale);
}

.spec-panel-head {
  background-color: var(--lapis-main);
  color: #ffffff;
  padding: 7px 14px;
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.spec-panel-gold .spec-panel-head {
  background-color: #7c5c18;
}

.spec-panel-crimson .spec-panel-head {
  background-color: var(--crimson-warn);
}

.spec-panel-body {
  padding: 12px 14px;
  font-size: 0.94rem;
}

/* Hub Cards Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.hub-card {
  background-color: var(--paper-white);
  border: 1px solid var(--rule-mid);
  border-top: 3px solid var(--lapis-main);
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.hub-card:hover {
  border-top-color: var(--dawn-gold);
  background-color: #fdfcf8;
}

.hub-card h3 {
  margin: 0 0 6px;
  font-size: 1.03rem;
  font-family: Georgia, "Times New Roman", "Noto Serif JP", serif;
}

.hub-card p {
  margin: 0;
  font-size: 0.89rem;
  color: var(--ink-muted);
}

.hub-card-meta {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--lapis-main);
  border-top: 1px solid var(--rule-light);
  padding-top: 8px;
}

/* Tables (Strictly for concise reference/comparison lists) */
.prima-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 18px;
  background-color: var(--paper-white);
  font-size: 0.9rem;
}

.prima-table th,
.prima-table td {
  border: 1px solid var(--rule-mid);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.prima-table th {
  background-color: var(--lapis-deep);
  color: #ffffff;
  font-weight: 600;
}

.prima-table tr:nth-child(even) td {
  background-color: #f7f5ee;
}

/* Checklist Items */
.checklist {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.check-item {
  background-color: var(--paper-white);
  border: 1px solid var(--rule-light);
  padding: 9px 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.check-item.checked {
  background-color: var(--emerald-pale);
  border-color: #a9d1be;
}

.check-item input[type="checkbox"] {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  accent-color: var(--lapis-main);
  cursor: pointer;
  flex-shrink: 0;
}

.check-body {
  flex: 1;
}

.check-date {
  font-weight: 700;
  color: var(--lapis-main);
  margin-right: 6px;
}

.check-note {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 2px;
}

/* Save Marker Block */
.save-marker {
  background-color: var(--lapis-soft);
  border: 1px solid #b8c4e0;
  padding: 7px 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--lapis-deep);
  margin: 10px 0;
}

/* Spoiler Mask */
.spoiler {
  background-color: var(--lapis-deep);
  color: transparent;
  padding: 1px 5px;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px dotted var(--dawn-gold);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.spoiler:hover {
  background-color: var(--lapis-mid);
}

.spoiler.revealed {
  background-color: #ebe6d8;
  color: var(--ink-main);
  user-select: text;
  cursor: text;
}

/* Term & Tooltip */
.term {
  border-bottom: 1px dotted var(--lapis-mid);
  cursor: help;
}

.tooltip-float {
  position: fixed;
  z-index: 9999;
  background-color: var(--lapis-deep);
  color: #ffffff;
  font-size: 0.8rem;
  padding: 4px 9px;
  border: 1px solid var(--dawn-gold);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s ease;
  max-width: 280px;
}

.tooltip-float.visible {
  opacity: 1;
}

/* Floating Language Toggle */
.lang-toggle-float {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 9000;
  background-color: var(--lapis-deep);
  color: #d4cbb8;
  border: 2px solid var(--dawn-gold);
  padding: 7px 12px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 3px 10px rgba(18, 27, 56, 0.3);
}

.lang-toggle-float:hover {
  border-color: var(--dawn-gold-bright);
}

.lang-opt.active {
  color: var(--dawn-gold-bright);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 680px) {
  .masthead-inner {
    padding: 12px 14px 0;
  }
  .prima-sheet {
    padding: 18px 14px 68px;
  }
  .page-header h1 {
    font-size: 1.4rem;
  }
}