/* AI活用事例サーチ / NOVEL Design Guideline 準拠
   色・フォント・radius は tokens.css の --nvl-* を使う（このファイルでは定義しない）
   ドロップシャドウ禁止・角丸4px以下・グラデ135deg固定・暖色禁止 */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--nvl-font-ja);
  color: var(--nvl-ink);
  background: #fff;
  line-height: 1.7;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--nvl-blue); }

/* Header / Hero（白地・グラデ文字の2段構え） */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--nvl-border);
  padding: 40px 0 44px;
}
.brand {
  margin: 0 0 20px;
  font-family: var(--nvl-font-en);
  font-weight: 500;
  letter-spacing: 0.22em;
  font-size: 13px;
  color: var(--nvl-blue);
}
.hero-title {
  margin: 0 0 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-en {
  font-family: var(--nvl-font-en);
  font-weight: 500;
  font-size: 52px;
  letter-spacing: 0.03em;
  line-height: 1.15;
}
.hero-ja {
  font-family: var(--nvl-font-ja);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--nvl-text);
}
.hero-copy {
  margin: 0;
  font-size: 17px;
  font-weight: 400;
  color: var(--nvl-text);
  letter-spacing: 0.03em;
}

/* Filters */
.filters {
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  padding: 24px 24px 20px;
  margin: 28px 0;
}
.step { margin-bottom: 20px; }
.step:last-of-type { margin-bottom: 12px; }
.step-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 11px;
}
.step-num {
  font-family: var(--nvl-font-en);
  font-size: 12px;
  font-weight: 500;
  color: var(--nvl-blue);
  letter-spacing: 0.08em;
}
.step-label {
  font-size: 15px;
  font-weight: 700;
  color: var(--nvl-ink);
  letter-spacing: 0.05em;
}
.step-hint {
  font-size: 12px;
  font-weight: 400;
  color: var(--nvl-text);
  margin-left: 4px;
  letter-spacing: 0.05em;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  font-family: inherit;
  font-size: 13.5px;
  color: var(--nvl-text);
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius-pill);
  padding: 7px 16px;
  cursor: pointer;
  transition: background .12s ease, border-color .12s ease, color .12s ease;
  line-height: 1.4;
  letter-spacing: 0.04em;
}
.chip:hover {
  border-color: var(--nvl-blue);
  color: var(--nvl-blue);
  background: var(--nvl-tint-blue);
}
.chip.active {
  background: var(--nvl-blue);
  border-color: var(--nvl-blue);
  color: #fff;
}
.chip.active:hover {
  background: var(--nvl-navy);
  border-color: var(--nvl-navy);
  color: #fff;
}

.filters-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--nvl-border);
  flex-wrap: wrap;
}
.search-box { flex: 1 1 280px; }
.search-box input {
  width: 100%;
  font-family: inherit;
  font-size: 14.5px;
  padding: 11px 14px;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  background: var(--nvl-bg-light);
  color: var(--nvl-ink);
  letter-spacing: 0.03em;
}
.search-box input:focus {
  outline: none;
  border-color: var(--nvl-blue);
  background: #fff;
}

.link-btn {
  font-family: inherit;
  background: none;
  border: none;
  color: var(--nvl-blue);
  text-decoration: underline;
  cursor: pointer;
  font-size: 13.5px;
  padding: 4px 0;
  letter-spacing: 0.03em;
}
.link-btn:hover { color: var(--nvl-navy); }

/* Results */
.results { margin-bottom: 48px; }
.results-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.count {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--nvl-ink);
  letter-spacing: 0.05em;
}
.count .num {
  font-family: var(--nvl-font-en);
  color: var(--nvl-blue);
  font-size: 20px;
  font-weight: 500;
  margin-right: 2px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.grid[hidden] { display: none; }

.card {
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  text-align: left;
  font-family: inherit;
  transition: background .12s ease, border-color .12s ease;
}
.card:hover {
  border-color: var(--nvl-blue);
  background: var(--nvl-tint-blue);
}
.card-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  background: var(--nvl-bg-light);
  border-bottom: 1px solid var(--nvl-border);
}
.card-img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-inner {
  padding: 16px 18px 15px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card:focus-visible {
  outline: 2px solid var(--nvl-blue);
  outline-offset: 2px;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}
.tag {
  font-size: 11.5px;
  padding: 3px 11px;
  border-radius: var(--nvl-radius-pill);
  background: var(--nvl-bg-light);
  color: var(--nvl-text);
  line-height: 1.6;
  letter-spacing: 0.03em;
}
.tag.dept {
  background: var(--nvl-tint-blue);
  color: var(--nvl-blue);
}
.card-title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--nvl-ink);
  line-height: 1.5;
  letter-spacing: 0.03em;
}
.card-metric {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
}
.card-metric .val {
  font-size: 21px;
  font-weight: 700;
  color: var(--nvl-blue);
  line-height: 1.15;
  letter-spacing: 0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}
.card-metric .lab {
  font-size: 12px;
  color: var(--nvl-text);
  line-height: 1.4;
  min-width: 0;
}
.card-summary {
  margin: 0;
  font-size: 13px;
  color: var(--nvl-text);
  line-height: 1.7;
  letter-spacing: 0.02em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-summary:not(:last-child) { margin-bottom: 14px; }
.card-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--nvl-border);
}
.card-company {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--nvl-ink);
  letter-spacing: 0.03em;
}

/* 出典バッジ */
.badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: var(--nvl-radius-pill);
  line-height: 1.6;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
}
.badge-corp {
  background: var(--nvl-tint-blue);
  color: var(--nvl-blue);
  border-color: var(--nvl-blue);
}
.badge-pr {
  background: #fff;
  color: var(--nvl-text);
  border-color: var(--nvl-border);
}

/* Empty */
.empty {
  text-align: center;
  padding: 48px 20px;
  background: var(--nvl-bg-light);
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
}
.empty-title { margin: 0 0 6px; font-size: 18px; font-weight: 700; color: var(--nvl-ink); letter-spacing: 0.05em; }
.empty-sub { margin: 0 0 20px; color: var(--nvl-text); font-size: 14px; }
.empty-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  padding: 13px 32px;
  border-radius: var(--nvl-radius);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  border: 1px solid transparent;
  letter-spacing: 0.05em;
  transition: opacity .12s ease, background .12s ease, color .12s ease;
}
.btn-primary { background: var(--nvl-gradient); color: #fff; border-color: transparent; }
.btn-primary:hover { opacity: 0.88; }
.btn-line { background: #fff; color: var(--nvl-blue); border-color: var(--nvl-blue); }
.btn-line:hover { background: var(--nvl-tint-blue); }

/* Footer（ダーク面） */
.site-footer {
  background: var(--nvl-bg-dark);
  color: rgba(255, 255, 255, 0.72);
  padding: 32px 0;
  font-size: 12.5px;
}
.site-footer .note { margin: 0 0 8px; line-height: 1.8; letter-spacing: 0.02em; }
.site-footer .run { margin: 0; letter-spacing: 0.03em; }
.site-footer a { color: #fff; }

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 8, 8, .55);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  overflow-y: auto;
  z-index: 100;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  max-width: 720px;
  width: 100%;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--nvl-ink);
  z-index: 2;
}
.modal-close:hover { border-color: var(--nvl-blue); color: var(--nvl-blue); }
.modal-body { padding: 32px 32px 28px; }

.m-img {
  margin: -32px -32px 22px;
  height: 160px;
  background: var(--nvl-bg-light);
  border-bottom: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius) var(--nvl-radius) 0 0;
  overflow: hidden;
}
.m-img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.m-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.m-company {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--nvl-blue);
  letter-spacing: 0.05em;
}
.m-title {
  margin: 0 0 24px;
  font-size: 22px;
  font-weight: 700;
  color: var(--nvl-ink);
  line-height: 1.45;
  letter-spacing: 0.04em;
  padding-right: 28px;
}
.m-section { margin-bottom: 22px; }
.m-section:last-child { margin-bottom: 0; }
.m-h {
  font-size: 12px;
  font-weight: 500;
  color: var(--nvl-blue);
  letter-spacing: 0.1em;
  margin: 0 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--nvl-border);
}
.m-p { margin: 0; font-size: 14.5px; line-height: 1.9; color: var(--nvl-text); letter-spacing: 0.02em; }

.m-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.m-metric {
  background: #fff;
  border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius);
  padding: 14px 16px;
  flex: 1 1 auto;
  min-width: 140px;
  max-width: 100%;
}
.m-metric .val {
  font-size: 24px;
  font-weight: 700;
  color: var(--nvl-blue);
  line-height: 1.15;
  display: block;
  margin-bottom: 4px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
@media (max-width: 480px) {
  .m-metric .val { font-size: 20px; }
}
.m-metric .lab { font-size: 12.5px; color: var(--nvl-text); line-height: 1.5; }

.m-pitfall {
  background: var(--nvl-tint-blue);
  border-left: 3px solid var(--nvl-blue);
  padding: 12px 16px;
}
.m-comment {
  background: var(--nvl-bg-light);
  padding: 14px 16px;
  border-radius: var(--nvl-radius);
  font-size: 14px;
  line-height: 1.8;
  color: var(--nvl-text);
  letter-spacing: 0.02em;
}

.m-source-link {
  font-size: 14px;
  color: var(--nvl-blue);
  text-decoration: underline;
  letter-spacing: 0.02em;
  word-break: break-word;
}

.m-cta {
  margin-top: 28px;
  border-top: 1px solid var(--nvl-border);
  padding-top: 24px;
}
.m-cta-card {
  background: var(--nvl-bg-dark);
  color: rgba(255, 255, 255, 0.82);
  border-radius: var(--nvl-radius);
  padding: 22px 24px;
}
.m-cta-name { font-size: 16px; font-weight: 700; margin: 0 0 6px; color: #fff; letter-spacing: 0.04em; }
.m-cta-desc { font-size: 13.5px; margin: 0 0 18px; color: rgba(255, 255, 255, 0.72); line-height: 1.8; }
.m-cta-card .btn-primary { display: inline-block; }

.m-note {
  margin: 18px 0 0;
  font-size: 11.5px;
  color: var(--nvl-text);
  line-height: 1.8;
  letter-spacing: 0.02em;
}

body.modal-open { overflow: hidden; }

/* Responsive */
@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
  .site-header { padding: 32px 0 34px; }
  .hero-en { font-size: 38px; }
  .hero-copy { font-size: 15px; }
  .wrap { padding: 0 16px; }
  .filters { padding: 18px 16px 14px; }
  .modal-body { padding: 26px 18px 22px; }
  .m-img { margin: -26px -18px 18px; height: 140px; }
  .modal-backdrop { padding: 16px 10px; }
  .results-head { flex-direction: column; align-items: flex-start; gap: 6px; }
}