/* ============================================================
   IDEATECH - Design Guidelines Page Stylesheet  (prefix: dg-)
   グランドカラー準拠・フラットデザイン
   ============================================================ */

body { background: var(--kuro1); color: var(--shiro1); }

/* ----------------------------------------
   1. Hero
   ---------------------------------------- */
.dg-hero {
  padding: calc(var(--header-h) + 64px) 80px 64px;
  max-width: 960px;
  margin: 0 auto;
}

.dg-hero__label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--daidai);
  margin-bottom: 24px;
}

.dg-hero__title {
  color: var(--shiro1);
  margin-bottom: 24px;
}

.dg-hero__desc {
  color: var(--shiro3);
  max-width: 640px;
}

/* ----------------------------------------
   2. Section
   ---------------------------------------- */
.dg-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 80px;
  border-top: 1px solid var(--kuro4);
}

.dg-table th:first-child,
.dg-table td:first-child,
.dg-table th:nth-child(2),
.dg-table td:nth-child(2) {
  white-space: nowrap;
}

.dg-section__title {
  color: var(--shiro1);
  margin-bottom: 12px;
}

.dg-section__desc {
  color: var(--shiro3);
  font-size: 15px;
  line-height: 1.95;
  margin-bottom: 48px;
}

/* ----------------------------------------
   3. Color Group
   ---------------------------------------- */
.dg-color-group {
  margin-bottom: 48px;
}

.dg-color-group:last-child {
  margin-bottom: 0;
}

.dg-color-group__title {
  color: var(--shiro3);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.dg-color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.dg-color-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--kuro4);
  border-radius: 4px;
}

.dg-color-swatch {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  flex-shrink: 0;
  border: 1px solid var(--kuro4);
}

.dg-color-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dg-color-var {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--shiro1);
}

.dg-color-hex {
  font-family: var(--font-heading);
  font-size: 12px;
  color: var(--shiro3);
}

/* ----------------------------------------
   4. Color Rules
   ---------------------------------------- */
.dg-rules {
  margin-top: 48px;
  padding: 32px;
  border: 1px solid var(--kuro4);
  border-radius: 4px;
}

.dg-rules__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--shiro1);
  margin-bottom: 20px;
}

.dg-rules__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dg-rules__item {
  font-size: 14px;
  color: var(--shiro3);
  line-height: 1.7;
  padding-left: 1.2em;
  position: relative;
}

.dg-rules__item::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--kuro4);
}

/* ----------------------------------------
   5. Font Variables
   ---------------------------------------- */
.dg-font-vars {
  margin-bottom: 48px;
  padding: 24px;
  background: var(--kuro2);
  border-radius: 4px;
  border: 1px solid var(--kuro4);
}

.dg-font-var {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  font-family: var(--font-heading);
  font-size: 13px;
  line-height: 1.6;
  border-bottom: 1px solid var(--kuro4);
}

.dg-font-var:last-child {
  border-bottom: none;
}

.dg-font-var__name {
  color: var(--sora);
  min-width: 140px;
  flex-shrink: 0;
}

.dg-font-var__value {
  color: var(--shiro3);
}

/* ----------------------------------------
   6. Table
   ---------------------------------------- */
.dg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin-bottom: 32px;
}

.dg-table th {
  text-align: left;
  font-weight: 600;
  color: var(--shiro3);
  padding: 18px 20px;
  border-bottom: 1px solid var(--kuro4);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.dg-table td {
  padding: 20px 20px;
  color: var(--shiro1);
  border-bottom: 1px solid var(--kuro4);
  line-height: 1.95;
  vertical-align: top;
}

.dg-table tr:last-child td {
  border-bottom: none;
}

.dg-table td:first-child {
  font-weight: 600;
}

/* ----------------------------------------
   7. Layout Group (Grand Layout subsections)
   ---------------------------------------- */
.dg-layout-group {
  margin-bottom: 48px;
}

.dg-layout-group:last-child {
  margin-bottom: 0;
}

.dg-layout-group__title {
  color: var(--shiro1);
  margin-top: 56px;
  margin-bottom: 24px;
}

.dg-layout-group__desc {
  color: var(--shiro3);
  font-size: 15px;
  line-height: 1.95;
  margin-bottom: 28px;
}

.dg-layout-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.dg-layout-list__item {
  font-size: 15px;
  color: var(--shiro3);
  line-height: 1.95;
  padding-left: 1.5em;
  position: relative;
}

.dg-layout-list__item::before {
  content: '●';
  position: absolute;
  left: 0;
  color: var(--kuro4);
  font-size: 8px;
  top: 0.5em;
}

.dg-layout-note {
  color: var(--shiro3);
  font-size: 13px;
  margin-top: 16px;
}

/* ----------------------------------------
   8. Button Cards
   ---------------------------------------- */
.dg-btn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.dg-btn-card {
  border: 1px solid var(--kuro4);
  border-radius: 4px;
  overflow: hidden;
}

.dg-btn-card__previews {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.dg-btn-card__sample {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 16px;
  background: var(--kuro2);
  position: relative;
}

.dg-btn-card__sample--light {
  background: var(--shiro1);
}

.dg-btn-card__sample--dark {
  background: var(--kuro1);
}

.dg-btn-card__mode-label {
  font-family: var(--font-heading);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dg-btn-card__sample--light .dg-btn-card__mode-label {
  color: var(--kuro4);
}

.dg-btn-card__sample--dark .dg-btn-card__mode-label {
  color: var(--kuro4);
}

.dg-btn-card__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
}

.dg-btn-card__type {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--shiro1);
}

.dg-btn-card__class {
  font-family: var(--font-heading);
  font-size: 12px;
  color: var(--sora);
}

.dg-btn-card__detail {
  font-size: 13px;
  color: var(--shiro3);
  line-height: 1.6;
}

.dg-btn-card__usage {
  font-size: 12px;
  color: var(--kuro4);
}

/* ----------------------------------------
   9. Principles
   ---------------------------------------- */
.dg-principles {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dg-principle {
  font-size: 15px;
  color: var(--shiro3);
  line-height: 1.8;
  padding-left: 1.5em;
  position: relative;
}

.dg-principle::before {
  content: '●';
  position: absolute;
  left: 0;
  color: var(--kuro4);
  font-size: 8px;
  top: 0.5em;
}

/* ----------------------------------------
   8. Responsive
   ---------------------------------------- */
@media (max-width: 768px) {
  .dg-hero {
    padding: calc(var(--header-h) + 40px) 24px 40px;
  }

  .dg-section {
    padding: 48px 24px;
  }

  .dg-color-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .dg-font-var {
    flex-direction: column;
    gap: 4px;
  }

  .dg-font-var__name {
    min-width: auto;
  }

  .dg-table {
    font-size: 13px;
  }

  .dg-table th,
  .dg-table td {
    padding: 10px 12px;
  }

  .dg-btn-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .dg-color-grid {
    grid-template-columns: 1fr;
  }

  .dg-table {
    display: block;
    overflow-x: auto;
  }

  .dg-btn-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Archive Banner (v1 凍結表示)
   ============================================ */
.dg-archive-banner {
  max-width: 880px;
  margin: 32px auto;
  padding: 24px 28px;
  background: var(--kuro2);
  border: 1px solid var(--karashi);
  border-radius: 8px;
}
.dg-archive-banner__title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--karashi);
  margin: 0 0 8px;
  letter-spacing: 0.04em;
}
.dg-archive-banner__text {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--shiro3);
  margin: 0;
}
.dg-archive-banner__text a {
  color: var(--daidai);
  text-decoration: underline;
}

/* ============================================
   Version Selector (index landing)
   ============================================ */
.dg-vlist {
  max-width: 720px;
  margin: 48px auto 96px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.dg-vlist__item {
  display: block;
  padding: 28px 32px;
  background: var(--kuro2);
  border: 1px solid var(--kuro4);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s;
}
.dg-vlist__item:hover {
  border-color: var(--daidai);
}
.dg-vlist__item--current {
  border-color: var(--daidai);
}
.dg-vlist__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 8px;
}
.dg-vlist__ver {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--shiro1);
  letter-spacing: 0.02em;
}
.dg-vlist__badge {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 999px;
}
.dg-vlist__badge--current {
  background: var(--daidai);
  color: var(--kuro1);
}
.dg-vlist__badge--archived {
  background: var(--kuro4);
  color: var(--shiro3);
}
.dg-vlist__date {
  font-family: var(--font-heading);
  font-size: 13px;
  color: var(--shiro3);
  margin-left: auto;
}
.dg-vlist__desc {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--shiro3);
  margin: 0;
}

/* ============================================
   Layer Architecture additions
   ============================================ */
.dg-subgroup__title {
  font-family: var(--font-mincho);
  font-size: 17px;
  font-weight: 700;
  color: var(--shiro1);
  margin: 32px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--daidai);
}
.dg-chunk-badge {
  display: inline-block;
  padding: 4px 10px;
  margin: 2px 4px 2px 0;
  background: var(--kuro3);
  color: var(--shiro3);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.02em;
  border-radius: 4px;
  white-space: nowrap;
}
.dg-vlist__badge--strict {
  background: var(--daidai);
  color: var(--kuro1);
}
.dg-vlist__badge--flex {
  background: var(--karashi);
  color: var(--kuro1);
}
.dg-vlist__badge--indep {
  background: var(--sora);
  color: var(--kuro1);
}
.dg-planet {
  margin: 16px 0;
  padding: 20px 24px;
  background: var(--kuro2);
  border: 1px solid var(--kuro4);
  border-radius: 8px;
}
.dg-planet__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.dg-planet__id {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--daidai);
  letter-spacing: 0.04em;
}
.dg-planet__name {
  font-family: var(--font-mincho);
  font-size: 18px;
  font-weight: 700;
  color: var(--shiro1);
}
.dg-planet__path {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--shiro3);
  margin: 0 0 4px;
}
.dg-planet__todo {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--karashi);
  margin: 0;
}

/* ============================================
   Corporate Gradients (v2 / v13.0)
   ============================================ */
.dg-grad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 16px;
  margin-bottom: 56px;
}
.dg-grad-card {
  display: flex;
  flex-direction: column;
  background: var(--kuro2);
  border: 1px solid var(--kuro4);
  border-radius: 8px;
  overflow: hidden;
}
.dg-grad-swatch {
  height: 120px;
  width: 100%;
}
.dg-grad-info {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dg-grad-name {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--shiro1);
  margin: 0;
}
.dg-grad-css {
  margin: 0;
}
.dg-grad-css code {
  font-family: var(--font-heading);
  font-size: 12px;
  color: var(--sora);
  background: rgba(106,155,204,0.1);
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-block;
  word-break: break-all;
  line-height: 1.5;
}
.dg-grad-usage {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--shiro3);
  line-height: 1.6;
  margin: 0;
}