:root {
    --bg: #0f0e0b;
    --surface: #1a1915;
    --surface2: #232118;
    --border: #2e2b24;
    --border2: #3d3930;
    --gold: #c9a84c;
    --gold-dim: #8a6f2e;
    --gold-glow: rgba(201,168,76,0.15);
    --text: #e8e2d4;
    --text-dim: #9e9484;
    --text-muted: #5c5748;
    --red: #c45c4a;
    --green: #6a9f6a;
    --blue: #5a84a8;
    --accent: #b8965a;
    --r: 4px;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 300;
    min-height: 100vh;
    line-height: 1.7;
  }

  header {
    border-bottom: 1px solid var(--border);
    padding: 24px 32px 20px;
    background: linear-gradient(180deg, #141310 0%, var(--bg) 100%);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
  }

  .header-inner { max-width: 1200px; margin: 0 auto; }

  .header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
  }
  .header-title-group {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
  }
  .lang-switcher {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
  }
  .lang-btn {
    padding: 5px 14px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-family: 'DM Mono', monospace;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.15s;
  }
  .lang-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
  }
  .lang-btn:hover:not(.active) {
    border-color: var(--accent);
    color: var(--accent);
  }

  h1 {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--gold);
    letter-spacing: 0.08em;
  }

  .subtitle {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    font-family: 'DM Mono', monospace;
  }

  .controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
  }

  .search-wrap {
    position: relative;
    flex: 1;
    min-width: 200px;
  }

  .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
  }

  input[type="text"] {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 9px 12px 9px 34px;
    color: var(--text);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
  }

  input[type="text"]:focus { border-color: var(--gold-dim); }
  input[type="text"]::placeholder { color: var(--text-muted); }

  .filters { display: flex; gap: 6px; flex-wrap: wrap; }

  .filter-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 14px;
    color: var(--text-dim);
    font-size: 0.75rem;
    font-family: 'Noto Sans JP', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.04em;
    white-space: nowrap;
  }

  .filter-btn:hover { border-color: var(--border2); color: var(--text); }
  .filter-btn.active {
    background: var(--gold-glow);
    border-color: var(--gold-dim);
    color: var(--gold);
  }

  .count-badge {
    font-family: 'DM Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: auto;
    white-space: nowrap;
  }

  main { max-width: 1200px; margin: 0 auto; padding: 28px 32px; }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 14px;
  }

  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 18px 20px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
　　overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--gold-dim);
    opacity: 0;
    transition: opacity 0.2s;
  }

  .card:hover {
    border-color: var(--border2);
    background: var(--surface2);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  }

  .card:hover::before { opacity: 1; }

  .card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
  }

  .card-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
  }

  .cat-tag {
    font-family: 'DM Mono', monospace;
    font-size: 0.62rem;
    padding: 3px 8px;
    border-radius: 3px;
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .cat-g { background: rgba(106,159,106,0.15); color: var(--green); border: 1px solid rgba(106,159,106,0.3); }
  .cat-r { background: rgba(90,132,168,0.15); color: var(--blue); border: 1px solid rgba(90,132,168,0.3); }
  .cat-c { background: rgba(180,134,72,0.15); color: var(--accent); border: 1px solid rgba(180,134,72,0.3); }
  .cat-m { background: rgba(196,92,74,0.15); color: var(--red); border: 1px solid rgba(196,92,74,0.3); }

  .card-meta {
    font-size: 0.68rem;
    color: var(--text-muted);
    font-family: 'DM Mono', monospace;
    margin-bottom: 0;
    letter-spacing: 0.04em;
  }

.card-short {
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.65;
  }

  .overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    z-index: 200;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.15s ease;
  }

  .overlay.open { display: flex; align-items: center; justify-content: center; padding: 24px; }

  @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
  @keyframes slideUp { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

  .modal {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: 6px;
    max-width: 680px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    animation: slideUp 0.2s ease;
    box-shadow: 0 24px 60px rgba(0,0,0,0.7);
  }

  .modal::-webkit-scrollbar { width: 4px; }
  .modal::-webkit-scrollbar-track { background: transparent; }
  .modal::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

  .modal-header {
    padding: 24px 28px 18px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--surface);
    z-index: 1;
  }

  .modal-header-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 6px;
  }

  .modal-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gold);
    line-height: 1.3;
  }

  .close-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 3px;
    width: 28px; height: 28px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s;
  }

  .close-btn:hover { border-color: var(--border2); color: var(--text); }

  .modal-meta {
    font-family: 'DM Mono', monospace;
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
  }

  .modal-body { padding: 22px 28px 28px; }

  .section-label {
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    color: var(--gold-dim);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 8px;
    margin-top: 22px;
  }

  .section-label:first-child { margin-top: 0; }

  .detail-text {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.8;
    border-left: 2px solid var(--border);
    padding-left: 14px;
  }

  .points-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 7px;
  }

  .points-list li {
    font-size: 0.82rem;
    color: var(--text-dim);
    display: flex;
    gap: 10px;
    align-items: flex-start;
  }

  .bullet {
    color: var(--gold-dim);
    font-family: 'DM Mono', monospace;
    font-size: 0.7rem;
    margin-top: 3px;
    flex-shrink: 0;
  }

  .check-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .check-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-size: 0.82rem;
    padding: 8px 12px;
    border-radius: var(--r);
    border: 1px solid var(--border);
    background: var(--surface2);
  }

  .check-icon {
    font-family: 'DM Mono', monospace;
    font-size: 0.8rem;
    flex-shrink: 0;
    margin-top: 1px;
  }

  .check-pass { color: var(--green); }
  .check-fail { color: var(--red); }
  .check-item-pass { border-color: rgba(106,159,106,0.2); }
  .check-item-fail { border-color: rgba(196,92,74,0.15); }

  .persona-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .persona-card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 10px 12px;
  }

  .persona-wave {
    font-family: 'DM Mono', monospace;
    font-size: 0.7rem;
    color: var(--gold);
    margin-bottom: 5px;
  }

  .persona-text { font-size: 0.75rem; color: var(--text-dim); line-height: 1.6; }

  .degree-table { width: 100%; border-collapse: collapse; font-size: 0.78rem; }

  .degree-table th {
    text-align: left;
    padding: 7px 12px;
    background: var(--surface2);
    color: var(--text-muted);
    font-weight: 400;
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--border);
  }

  .degree-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim);
    vertical-align: middle;
  }

  .degree-table tr:last-child td { border-bottom: none; }
  .degree-table td:first-child { color: var(--text); font-weight: 500; font-family: 'Noto Serif JP', serif; }
  .degree-table td:nth-child(3) { font-family: 'DM Mono', monospace; font-size: 0.75rem; color: var(--gold-dim); }

  .steps-list { display: flex; flex-direction: column; gap: 10px; }

  .step-item {
    display: flex;
    gap: 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 12px 14px;
  }

  .step-num {
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    color: var(--gold-dim);
    background: var(--gold-glow);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 2px 7px;
    flex-shrink: 0;
    height: fit-content;
    margin-top: 2px;
  }

  .step-content { flex: 1; }
  .step-title { font-size: 0.82rem; color: var(--text); margin-bottom: 4px; font-weight: 500; }
  .step-desc { font-size: 0.78rem; color: var(--text-dim); line-height: 1.65; }

  .related-wrap { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }

  .related-btn {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 5px 12px;
    color: var(--gold-dim);
    font-size: 0.75rem;
    cursor: pointer;
    font-family: 'Noto Sans JP', sans-serif;
    transition: all 0.15s;
  }

  .related-btn:hover {
    border-color: var(--gold-dim);
    color: var(--gold);
    background: var(--gold-glow);
  }

  .empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    grid-column: 1/-1;
  }

  ::-webkit-scrollbar { width: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

  /* === Chart Diagram === */
  .chart-wrap {
    background: linear-gradient(180deg, #141310 0%, #0c0b08 100%);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 18px 18px 14px;
    position: relative;
  }
  .chart-caption {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    letter-spacing: 0.04em;
  }
  .chart-svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
  }
  .chart-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .chart-btn {
    background: transparent;
    border: 1px solid var(--gold-dim);
    color: var(--gold);
    font-family: 'DM Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s;
  }
  .chart-btn:hover {
    background: var(--gold-glow);
    color: var(--text);
    border-color: var(--gold);
  }
  .chart-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
  }
  .chart-progress {
    flex: 1;
    height: 2px;
    background: var(--border);
    border-radius: 1px;
    overflow: hidden;
  }
  .chart-progress-bar {
    height: 100%;
    background: var(--gold);
    width: 0%;
    transition: width 0.3s ease;
  }
  .chart-status {
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    min-width: 50px;
    text-align: right;
  }

  /* SVG element styles */
  .wave-line {
    fill: none;
    stroke: var(--gold);
    stroke-width: 0.9;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .wave-line-dim {
    fill: none;
    stroke: var(--gold-dim);
    stroke-width: 0.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.6;
  }
  .wave-line-accent {
    fill: none;
    stroke: var(--accent);
    stroke-width: 1.1;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .wave-dot {
    fill: var(--gold);
    stroke: var(--bg);
    stroke-width: 0.6;
  }
  .wave-dot-accent {
    fill: var(--red);
    stroke: var(--bg);
    stroke-width: 0.6;
  }
  .wave-line-highlight {
    fill: none;
    stroke: var(--red);
    stroke-width: 1.3;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .wave-label-accent {
    font-family: 'DM Mono', monospace;
    fill: var(--red);
    font-weight: 600;
  }
  .wave-label {
    font-family: 'DM Mono', monospace;
    fill: var(--gold);
    font-weight: 500;
  }
  .wave-label-bg {
    fill: var(--bg);
    stroke: var(--gold-dim);
    stroke-width: 1;
  }
  .wave-axis {
    stroke: var(--border);
    stroke-width: 0.5;
    stroke-dasharray: 1.5 2;
  }
  .wave-channel {
    fill: none;
    stroke: var(--gold-dim);
    stroke-width: 0.4;
    stroke-dasharray: 1.5 1.5;
    opacity: 0.5;
  }
  .wave-annotation {
    font-family: 'Noto Sans JP', sans-serif;
    fill: var(--text-dim);
  }
  .wave-annotation-accent {
    font-family: 'Noto Sans JP', sans-serif;
    fill: var(--red);
    font-weight: 500;
  }
  .wave-shade {
    fill: var(--accent);
    opacity: 0.08;
  }
  .wave-bracket {
    fill: none;
    stroke: var(--accent);
    stroke-width: 1;
    opacity: 0.6;
  }

  /* ストップ高安研究所リンクボタン */
  .tools-nav-wrap {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 20px;
  }
  .tools-nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: linear-gradient(135deg, rgba(212,165,116,0.12) 0%, rgba(201,122,91,0.08) 100%);
    border: 1px solid rgba(212,165,116,0.35);
    border-radius: 10px;
    color: #e8e6e1 !important;
    text-decoration: none !important;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s, background 0.15s;
  }
  .tools-nav-link:hover {
    transform: translateY(-2px);
    border-color: rgba(212,165,116,0.7);
    background: linear-gradient(135deg, rgba(212,165,116,0.18) 0%, rgba(201,122,91,0.12) 100%);
    box-shadow: 0 5px 14px rgba(0,0,0,0.3);
  }
  .tools-nav-icon {
    font-size: 1.8em;
    flex-shrink: 0;
  }
  .tools-nav-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
    flex-grow: 1;
    min-width: 0;
  }
  .tools-nav-main {
    font-size: 1.05em;
    font-weight: 700;
    color: #d4a574;
    line-height: 1.3;
  }
  .tools-nav-sub {
    font-size: 0.78em;
    color: #8b959f;
    line-height: 1.35;
  }
  .tools-nav-arrow {
    font-size: 1.4em;
    color: #d4a574;
    flex-shrink: 0;
  }
  @media (max-width: 640px) {
    .tools-nav-link { padding: 14px 18px; gap: 12px; }
    .tools-nav-icon { font-size: 1.5em; }
    .tools-nav-main { font-size: 0.98em; }
    .tools-nav-sub { font-size: 0.72em; }
    .tools-nav-arrow { font-size: 1.2em; }
  }