@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');

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

  :root {
    --color-bg: #0a0e14;
    --color-surface-low: #0f141a;
    --color-surface-mid: #151a21;
    --color-surface-high: #1b2028;
    --color-surface-bright: #20262f;

    --color-primary: #81ecff;
    --color-primary-bright: #00e5ff;
    --color-primary-dim: #00d4ec;
    --color-secondary: #ff6c95;
    --color-secondary-bright: #ff4081;
    --color-tertiary: #a68cff;
    --color-error: #ff716c;

    --color-text: #f1f3fc;
    --color-text-muted: #a8abb3;
    --color-text-dim: #72757d;

    --color-border: #44484f;
    --color-border-strong: rgba(68, 72, 79, 0.65);

    --font-headline: 'Space Grotesk', sans-serif;
    --font-body: 'Manrope', sans-serif;
    --font-scale: 1.12;

    --radius: 12px;
    --radius-sm: 8px;

    --shadow-glow: 0 0 40px rgba(129, 236, 255, 0.08);
    --shadow-glow-strong: 0 0 65px rgba(0, 229, 255, 0.14);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.35);
  }

  html { scroll-behavior: smooth; }

  body {
    background:
      radial-gradient(circle at 15% -10%, rgba(0, 229, 255, 0.16), transparent 45%),
      radial-gradient(circle at 85% 8%, rgba(166, 140, 255, 0.13), transparent 38%),
      var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: calc(14px * var(--font-scale));
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  a { color: inherit; }

  ::selection {
    background: rgba(0, 229, 255, 0.24);
    color: var(--color-primary-bright);
  }

  ::-webkit-scrollbar { width: 6px; height: 6px; }
  ::-webkit-scrollbar-track { background: var(--color-bg); }
  ::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 999px;
  }
  ::-webkit-scrollbar-thumb:hover { background: var(--color-primary-dim); }

  .app { display: flex; min-height: 100vh; }

  .sidebar {
    width: 240px;
    min-width: 240px;
    background: rgba(15, 20, 26, 0.9);
    border-right: 1px solid var(--color-border-strong);
    box-shadow: var(--shadow-glow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 16px 0;
    z-index: 100;
  }

  .main {
    margin-left: 240px;
    padding: 34px;
    max-width: 980px;
    width: calc(100% - 240px);
  }

  .sidebar-logo {
    padding: 0 16px 16px;
    border-bottom: 1px solid rgba(68, 72, 79, 0.45);
    margin-bottom: 8px;
  }

  .sidebar-logo-title {
    font-family: var(--font-headline);
    font-size: calc(14px * var(--font-scale));
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-primary);
  }

  .sidebar-logo-sub {
    font-size: calc(11px * var(--font-scale));
    color: var(--color-text-dim);
    margin-top: 2px;
  }

  .sidebar-section {
    padding: 4px 16px;
    font-family: var(--font-body);
    font-size: calc(10px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-top: 12px;
    margin-bottom: 5px;
  }

  .nav-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 16px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    font-family: var(--font-headline);
    font-size: calc(12.5px * var(--font-scale));
    text-align: left;
    border-left: 2px solid transparent;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  }

  .nav-btn:hover {
    background: rgba(32, 38, 47, 0.85);
    color: var(--color-text);
  }

  .nav-btn.active {
    background: rgba(32, 38, 47, 0.95);
    color: var(--color-text);
    border-left-color: var(--color-primary);
  }

  .nav-icon {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(10px * var(--font-scale));
    font-weight: 700;
    flex-shrink: 0;
    border: 1px solid transparent;
    font-family: var(--font-headline);
  }

  .phase-hero { margin-bottom: 24px; }

  .phase-title {
    font-family: var(--font-headline);
    font-size: calc(28px * var(--font-scale));
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
    color: var(--color-text);
  }

  .badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
  }

  .badge {
    padding: 4px 12px;
    border-radius: 999px;
    font-family: var(--font-body);
    font-size: calc(11px * var(--font-scale));
    font-weight: 600;
    border: 1px solid transparent;
  }

  .badge-blue {
    background: rgba(129, 236, 255, 0.12);
    color: var(--color-primary);
    border-color: rgba(129, 236, 255, 0.28);
  }

  .badge-green {
    background: rgba(0, 212, 236, 0.12);
    color: var(--color-primary-dim);
    border-color: rgba(0, 212, 236, 0.28);
  }

  .badge-amber {
    background: rgba(255, 108, 149, 0.12);
    color: var(--color-secondary);
    border-color: rgba(255, 108, 149, 0.28);
  }

  .badge-purple {
    background: rgba(166, 140, 255, 0.12);
    color: var(--color-tertiary);
    border-color: rgba(166, 140, 255, 0.28);
  }

  .badge-red {
    background: rgba(255, 113, 108, 0.12);
    color: var(--color-error);
    border-color: rgba(255, 113, 108, 0.28);
  }

  .desc-block {
    background: rgba(27, 32, 40, 0.75);
    border: 1px solid rgba(68, 72, 79, 0.55);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 14px 18px;
    color: var(--color-text-muted);
    font-size: calc(13.5px * var(--font-scale));
    line-height: 1.75;
    margin-bottom: 24px;
  }

  .sec-title {
    font-family: var(--font-body);
    font-size: calc(10.5px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 24px 0 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(68, 72, 79, 0.45);
  }

  .card,
  .res-card,
  .proj-card,
  .mini-proj,
  .tool-card,
  .stat-card {
    background: rgba(21, 26, 33, 0.9);
    border: 1px solid rgba(68, 72, 79, 0.55);
    border-radius: var(--radius);
    box-shadow: 0 0 0 rgba(0, 229, 255, 0);
    transition: border-color 0.2s ease, box-shadow 0.25s ease, transform 0.25s ease;
  }

  .card:hover,
  .res-card:hover,
  .proj-card:hover,
  .mini-proj:hover,
  .tool-card:hover,
  .stat-card:hover {
    border-color: rgba(129, 236, 255, 0.34);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
  }

  .card { padding: 16px; }

  .card-title {
    font-family: var(--font-headline);
    font-size: calc(13.5px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
  }

  .grid2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
  }

  @media (max-width: 700px) {
    .grid2 { grid-template-columns: 1fr; }
  }

  .topic-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 5px;
  }

  .topic-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: calc(12.5px * var(--font-scale));
    color: var(--color-text-muted);
    line-height: 1.58;
  }

  .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 6px;
  }

  .dot-must { background: var(--color-primary); }
  .dot-good { background: var(--color-text-dim); }
  .dot-error { background: var(--color-error); }

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

  .res-card {
    padding: 16px;
    margin-bottom: 10px;
  }

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

  .res-name {
    font-family: var(--font-headline);
    font-size: calc(14px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text);
  }

  .res-tag {
    font-size: calc(10.5px * var(--font-scale));
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(166, 140, 255, 0.12);
    color: var(--color-tertiary);
    border: 1px solid rgba(166, 140, 255, 0.26);
    white-space: nowrap;
    font-weight: 600;
  }

  .res-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-primary);
    font-size: calc(12px * var(--font-scale));
    text-decoration: none;
    padding: 5px 12px;
    border: 1px solid rgba(129, 236, 255, 0.3);
    border-radius: 999px;
    background: rgba(129, 236, 255, 0.1);
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    flex-shrink: 0;
  }

  .res-link:hover {
    background: rgba(0, 229, 255, 0.18);
    border-color: rgba(0, 229, 255, 0.45);
    color: var(--color-primary-bright);
  }

  .res-link-inline {
    margin-top: 10px;
    display: inline-flex;
  }

  .res-by {
    font-size: calc(11.5px * var(--font-scale));
    font-family: var(--font-headline);
    color: var(--color-text-dim);
    margin-bottom: 6px;
    letter-spacing: 0.01em;
  }

  .res-why {
    font-size: calc(12.5px * var(--font-scale));
    color: var(--color-text-muted);
    line-height: 1.65;
  }

  .proj-card {
    padding: 16px;
    margin-bottom: 10px;
  }

  .proj-title {
    font-family: var(--font-headline);
    font-size: calc(14px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
  }

  .proj-desc {
    font-size: calc(12.5px * var(--font-scale));
    color: var(--color-text-muted);
    margin-bottom: 10px;
    line-height: 1.65;
  }

  .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
  }

  .tag {
    font-family: var(--font-headline);
    font-size: calc(11px * var(--font-scale));
    padding: 3px 9px;
    border-radius: 999px;
    background: rgba(32, 38, 47, 0.85);
    color: var(--color-text-dim);
    border: 1px solid rgba(68, 72, 79, 0.55);
  }

  .tip-box,
  .warn-box {
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: calc(12.5px * var(--font-scale));
    line-height: 1.65;
    margin-top: 12px;
  }

  .tip-box {
    background: rgba(129, 236, 255, 0.1);
    border: 1px solid rgba(129, 236, 255, 0.28);
    color: var(--color-primary);
  }

  .warn-box {
    background: rgba(255, 108, 149, 0.12);
    border: 1px solid rgba(255, 108, 149, 0.28);
    color: var(--color-secondary);
    margin-bottom: 16px;
  }

  .tip-box b,
  .warn-box b { font-weight: 700; }

  .data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: calc(12.5px * var(--font-scale));
    margin-top: 4px;
  }

  .data-table th {
    text-align: left;
    padding: 8px 12px;
    border-bottom: 1px solid rgba(68, 72, 79, 0.5);
    color: var(--color-text-dim);
    font-size: calc(10.5px * var(--font-scale));
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }

  .data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(68, 72, 79, 0.42);
    color: var(--color-text-muted);
    vertical-align: top;
    line-height: 1.6;
  }

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

  .data-table tr:hover td {
    background: rgba(32, 38, 47, 0.7);
  }

  .data-table td:first-child {
    color: var(--color-text);
    font-weight: 600;
    font-family: var(--font-headline);
    font-size: calc(11.5px * var(--font-scale));
    white-space: nowrap;
  }

  .table-link {
    color: var(--color-primary);
    text-decoration: none;
  }

  .table-link:hover { color: var(--color-primary-bright); }

  .summary-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin-bottom: 28px;
  }

  .stat-card {
    padding: 14px;
    text-align: center;
  }

  .stat-val {
    font-family: var(--font-headline);
    font-size: calc(22px * var(--font-scale));
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 2px;
    color: var(--color-primary);
  }

  .stat-lbl {
    font-size: calc(10.5px * var(--font-scale));
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
  }

  .page { display: none; }
  .page.active { display: block; }

  .proj-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 10px;
  }

  .mini-proj {
    padding: 14px;
    border-top: 2px solid rgba(68, 72, 79, 0.65);
  }

  .mini-proj-phase {
    font-size: calc(10px * var(--font-scale));
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
    color: var(--color-text-dim);
  }

  .mini-proj-title {
    font-family: var(--font-headline);
    font-size: calc(12.5px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
  }

  .tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
    margin-bottom: 4px;
  }

  .tool-card {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 3px;
  }

  .tool-name {
    font-family: var(--font-headline);
    font-size: calc(12.5px * var(--font-scale));
    font-weight: 700;
    color: var(--color-text);
  }

  .tool-why {
    font-size: calc(11.5px * var(--font-scale));
    color: var(--color-text-dim);
    line-height: 1.55;
  }

  .tool-link {
    font-size: calc(11px * var(--font-scale));
    color: var(--color-primary);
    text-decoration: none;
    margin-top: 3px;
  }

  .tool-link:hover { color: var(--color-primary-bright); }

  .card-danger { border-top: 2px solid var(--color-error); }
  .card-success { border-top: 2px solid var(--color-primary-dim); }

  .mb16 { margin-bottom: 16px; }
  .mb12 { margin-bottom: 12px; }
  .mt16 { margin-top: 16px; }

  .nav-icon.tone-green {
    background: rgba(129, 236, 255, 0.12);
    color: var(--color-primary);
    border-color: rgba(129, 236, 255, 0.28);
  }

  .nav-icon.tone-cyan {
    background: rgba(0, 229, 255, 0.12);
    color: var(--color-primary-bright);
    border-color: rgba(0, 229, 255, 0.28);
  }

  .nav-icon.tone-amber {
    background: rgba(255, 108, 149, 0.12);
    color: var(--color-secondary);
    border-color: rgba(255, 108, 149, 0.28);
  }

  .nav-icon.tone-purple {
    background: rgba(166, 140, 255, 0.12);
    color: var(--color-tertiary);
    border-color: rgba(166, 140, 255, 0.28);
  }

  .nav-icon.tone-red {
    background: rgba(255, 113, 108, 0.12);
    color: var(--color-error);
    border-color: rgba(255, 113, 108, 0.3);
  }

  .nav-icon.tone-teal {
    background: rgba(0, 212, 236, 0.12);
    color: var(--color-primary-dim);
    border-color: rgba(0, 212, 236, 0.28);
  }

  .nav-icon.tone-orange {
    background: rgba(255, 64, 129, 0.12);
    color: var(--color-secondary-bright);
    border-color: rgba(255, 64, 129, 0.28);
  }

  .nav-icon.tone-muted {
    background: rgba(168, 171, 179, 0.12);
    color: var(--color-text-muted);
    border-color: rgba(168, 171, 179, 0.28);
  }

  .mini-proj.tone-green { border-top-color: var(--color-primary); }
  .mini-proj-phase.tone-green { color: var(--color-primary); }

  .mini-proj.tone-cyan { border-top-color: var(--color-primary-bright); }
  .mini-proj-phase.tone-cyan { color: var(--color-primary-bright); }

  .mini-proj.tone-amber { border-top-color: var(--color-secondary); }
  .mini-proj-phase.tone-amber { color: var(--color-secondary); }

  .mini-proj.tone-purple { border-top-color: var(--color-tertiary); }
  .mini-proj-phase.tone-purple { color: var(--color-tertiary); }

  .mini-proj.tone-red { border-top-color: var(--color-error); }
  .mini-proj-phase.tone-red { color: var(--color-error); }

  .mini-proj.tone-teal { border-top-color: var(--color-primary-dim); }
  .mini-proj-phase.tone-teal { color: var(--color-primary-dim); }

  .mini-proj.tone-orange { border-top-color: var(--color-secondary-bright); }
  .mini-proj-phase.tone-orange { color: var(--color-secondary-bright); }

  .mini-proj.tone-muted { border-top-color: var(--color-text-muted); }
  .mini-proj-phase.tone-muted { color: var(--color-text-muted); }

  #projects .mini-proj {
    cursor: pointer;
    position: relative;
  }

  #projects .mini-proj::after {
    content: "View details";
    display: inline-block;
    margin-top: 10px;
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-primary);
    opacity: 0.75;
  }

  #projects .mini-proj:hover::after { opacity: 1; }

  #projects .mini-proj:focus-visible {
    outline: 2px solid rgba(129, 236, 255, 0.7);
    outline-offset: 2px;
    box-shadow: var(--shadow-glow-strong);
  }

  .daily-plan-item {
    background: rgba(32, 38, 47, 0.6);
    border-radius: 8px;
    padding: 12px 16px;
    border-left: 3px solid var(--color-primary-dim);
  }

  .daily-plan-title {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: calc(14px * var(--font-scale));
    color: var(--color-primary);
    margin-bottom: 4px;
  }

  .daily-plan-details {
    font-size: calc(12.5px * var(--font-scale));
    color: var(--color-text-muted);
    line-height: 1.6;
  }

  .daily-plan-item-clickable {
    cursor: pointer;
    border-left-color: var(--color-primary-bright);
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
  }

  .daily-plan-item-clickable:hover {
    background: rgba(32, 38, 47, 0.8);
    border-left-color: var(--color-primary);
    transform: translateY(-1px);
  }

  .daily-plan-item-clickable:focus-visible {
    outline: 2px solid rgba(129, 236, 255, 0.7);
    outline-offset: 2px;
  }

  .daily-plan-cta {
    margin-top: 8px;
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 4px 10px;
  }

  .project-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(8, 11, 16, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  .project-modal-overlay[hidden] {
    display: none;
  }

  .project-modal {
    width: min(900px, 100%);
    max-height: min(88vh, 900px);
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(27, 32, 40, 0.98), rgba(21, 26, 33, 0.98));
    border: 1px solid rgba(68, 72, 79, 0.7);
    border-radius: 16px;
    box-shadow: var(--shadow-card), var(--shadow-glow);
    padding: 20px;
    position: relative;
  }

  .learning-day-modal {
    width: min(1160px, 100%);
    max-height: min(92vh, 980px);
    padding: 16px;
  }

  .learning-day-back-btn {
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 5px 11px;
    text-transform: uppercase;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  }

  .learning-day-back-btn:hover {
    border-color: rgba(0, 229, 255, 0.5);
    background: rgba(0, 229, 255, 0.16);
    color: var(--color-primary-bright);
  }

  .learning-day-frame-wrap {
    margin-top: 12px;
    border: 1px solid rgba(68, 72, 79, 0.65);
    border-radius: 12px;
    overflow: hidden;
    background: var(--color-bg);
    min-height: 68vh;
  }

  .learning-day-frame {
    width: 100%;
    min-height: 68vh;
    border: 0;
    display: block;
    background: var(--color-bg);
  }

  .project-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 1px solid rgba(68, 72, 79, 0.75);
    background: rgba(15, 20, 26, 0.95);
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: calc(16px * var(--font-scale));
    line-height: 1;
    transition: color 0.2s ease, border-color 0.2s ease;
  }

  .project-modal-close:hover {
    color: var(--color-primary-bright);
    border-color: rgba(129, 236, 255, 0.5);
  }

  .project-modal-header {
    margin-bottom: 16px;
    padding-right: 42px;
  }

  .project-modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
  }

  .project-modal-chip {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    text-transform: uppercase;
  }

  .project-modal-title {
    font-family: var(--font-headline);
    font-size: calc(24px * var(--font-scale));
    line-height: 1.2;
    margin-bottom: 8px;
    color: var(--color-text);
  }

  .project-modal-summary {
    color: var(--color-text-muted);
    line-height: 1.7;
    font-size: calc(12.5px * var(--font-scale));
  }

  .project-modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .project-modal-card {
    background: rgba(21, 26, 33, 0.9);
    border: 1px solid rgba(68, 72, 79, 0.6);
    border-radius: var(--radius);
    padding: 14px;
  }

  .project-modal-card h4 {
    font-family: var(--font-headline);
    font-size: calc(12px * var(--font-scale));
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-dim);
    margin-bottom: 8px;
  }

  .project-modal-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .project-modal-list li {
    color: var(--color-text-muted);
    font-size: calc(12.5px * var(--font-scale));
    line-height: 1.55;
    position: relative;
    padding-left: 12px;
  }

  .project-modal-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-primary-dim);
  }

  .project-modal-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 2px;
  }

  .project-modal-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    padding: 5px 10px;
    font-family: var(--font-headline);
    font-size: calc(10.5px * var(--font-scale));
    transition: border-color 0.2s ease, background 0.2s ease;
  }

  .project-modal-link:hover {
    border-color: rgba(0, 229, 255, 0.5);
    background: rgba(0, 229, 255, 0.16);
  }

  .mustgood-clickable {
    cursor: pointer;
    position: relative;
    border-radius: 8px;
    padding: 4px 6px;
    margin-left: -6px;
    margin-right: -6px;
    transition: background 0.2s ease, border-color 0.2s ease;
    border: 1px solid transparent;
  }

  .mustgood-clickable:hover {
    background: rgba(129, 236, 255, 0.08);
    border-color: rgba(129, 236, 255, 0.24);
  }

  .mustgood-clickable:focus-visible {
    outline: 2px solid rgba(129, 236, 255, 0.7);
    outline-offset: 1px;
  }

  .topic-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(8, 11, 16, 0.84);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  .topic-modal-overlay[hidden] { display: none; }

  .topic-modal {
    width: min(980px, 100%);
    max-height: min(90vh, 940px);
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(27, 32, 40, 0.98), rgba(21, 26, 33, 0.98));
    border: 1px solid rgba(68, 72, 79, 0.75);
    border-radius: 16px;
    box-shadow: var(--shadow-card), var(--shadow-glow);
    padding: 20px;
    position: relative;
  }

  .topic-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 1px solid rgba(68, 72, 79, 0.75);
    background: rgba(15, 20, 26, 0.95);
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: calc(16px * var(--font-scale));
    line-height: 1;
    transition: color 0.2s ease, border-color 0.2s ease;
  }

  .topic-modal-close:hover {
    color: var(--color-primary-bright);
    border-color: rgba(129, 236, 255, 0.5);
  }

  .topic-modal-header {
    margin-bottom: 14px;
    padding-right: 44px;
  }

  .topic-modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
  }

  .topic-chip {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    text-transform: uppercase;
  }

  .topic-modal-title {
    font-family: var(--font-headline);
    font-size: calc(23px * var(--font-scale));
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 8px;
  }

  .topic-modal-theory {
    color: var(--color-text-muted);
    line-height: 1.75;
    font-size: calc(12.5px * var(--font-scale));
  }

  .topic-modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 14px;
  }

  .topic-panel {
    background: rgba(21, 26, 33, 0.9);
    border: 1px solid rgba(68, 72, 79, 0.6);
    border-radius: var(--radius);
    padding: 14px;
  }

  .topic-panel h4 {
    font-family: var(--font-headline);
    font-size: calc(12px * var(--font-scale));
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-dim);
    margin-bottom: 8px;
  }

  .subtopic-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .subtopic-item {
    border: 1px solid rgba(68, 72, 79, 0.45);
    border-radius: 10px;
    padding: 10px;
    background: rgba(32, 38, 47, 0.35);
  }

  .subtopic-title {
    font-family: var(--font-headline);
    font-size: calc(11.2px * var(--font-scale));
    color: var(--color-text);
    margin-bottom: 5px;
  }

  .subtopic-theory {
    font-size: calc(11.5px * var(--font-scale));
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 7px;
  }

  .topic-links {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
  }

  .topic-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid rgba(129, 236, 255, 0.35);
    background: rgba(129, 236, 255, 0.1);
    color: var(--color-primary);
    padding: 4px 10px;
    font-family: var(--font-headline);
    font-size: calc(10px * var(--font-scale));
    transition: border-color 0.2s ease, background 0.2s ease;
  }

  .topic-link:hover {
    border-color: rgba(0, 229, 255, 0.5);
    background: rgba(0, 229, 255, 0.16);
  }

  body.modal-open {
    overflow: hidden;
  }

  @media (max-width: 1100px) {
    .main { padding: 24px; }
    .phase-title { font-size: calc(25px * var(--font-scale)); }
  }

  @media (max-width: 900px) {
    .app { display: block; min-height: 100dvh; }

    .sidebar {
      position: sticky;
      top: 0;
      left: 0;
      width: 100%;
      min-width: 0;
      height: auto;
      max-height: none;
      border-right: none;
      border-bottom: 1px solid var(--color-border-strong);
      padding: 10px 12px;
      display: flex;
      gap: 8px;
      overflow-x: auto;
      overflow-y: hidden;
      white-space: nowrap;
      background: rgba(15, 20, 26, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .sidebar-logo,
    .sidebar-section { display: none; }

    .nav-btn {
      width: auto;
      min-width: max-content;
      padding: 8px 12px;
      border-left: none;
      border: 1px solid rgba(68, 72, 79, 0.55);
      border-radius: 999px;
      background: rgba(27, 32, 40, 0.92);
      font-size: calc(12px * var(--font-scale));
      gap: 8px;
      flex: 0 0 auto;
    }

    .nav-btn.active {
      background: rgba(129, 236, 255, 0.12);
      border-color: rgba(129, 236, 255, 0.35);
    }

    .main {
      margin-left: 0;
      width: 100%;
      max-width: none;
      padding: 18px 14px 28px;
    }

    .phase-title { font-size: clamp(20px, 6vw, 24px); }
    .desc-block { padding: 12px 14px; }
    .card, .res-card, .proj-card, .tip-box, .warn-box, .stat-card { padding: 13px; }
    .res-header { flex-direction: column; align-items: flex-start; gap: 8px; }
    .res-link { white-space: normal; }
    .proj-grid { grid-template-columns: 1fr; }
    .project-modal-grid { grid-template-columns: 1fr; }
    .topic-modal-grid { grid-template-columns: 1fr; }
    .learning-day-modal { width: 100%; max-height: 94vh; }
    .learning-day-frame-wrap,
    .learning-day-frame { min-height: 62vh; }
    .tool-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
    .data-table { display: block; overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }
  }

  @media (max-width: 480px) {
    body { font-size: calc(13px * var(--font-scale)); }
    .nav-btn { padding: 7px 10px; font-size: calc(11.5px * var(--font-scale)); }
    .nav-icon { width: 20px; height: 20px; font-size: calc(9px * var(--font-scale)); }
    .badge { font-size: calc(10px * var(--font-scale)); padding: 3px 9px; }
    .card-title, .proj-title, .res-name { font-size: calc(13px * var(--font-scale)); }
    .tool-grid { grid-template-columns: 1fr; }
    .summary-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  }