* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    :root {
      --ink: #1a1a2e;
      --ink-light: #2d2d44;
      --paper: #faf9f7;
      --paper-warm: #f5f3ef;
      --accent: #c45c4a;
      --accent-soft: #d4786a;
      --sage: #7a9e7e;
      --gold: #c9a962;
      --text: #3d3d3d;
      --text-light: #6b6b6b;
    }
    
    body {
      font-family: 'Outfit', sans-serif;
      background: var(--paper);
      color: var(--text);
      line-height: 1.6;
    }
    
    .jp {
      font-family: 'Noto Serif JP', serif;
    }
    
    /* NAVIGATION */
    /* TOAST NOTIFICATION */
    .toast {
      position: fixed;
      top: 5rem;
      left: 50%;
      transform: translateX(-50%) translateY(-20px);
      background: var(--ink);
      color: var(--paper);
      padding: 0.75rem 1.5rem;
      border-radius: 4px;
      font-size: 0.95rem;
      font-weight: 500;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 1000;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
    
    .toast.visible {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
    }
    
    .toast.success {
      background: var(--sage);
    }
    
    .toast.warning {
      background: #f9a825;
      color: var(--ink);
    }

    /* BACK TO TOP BUTTON */
    .back-to-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 48px;
      height: 48px;
      background: var(--ink);
      color: var(--paper);
      border: none;
      border-radius: 50%;
      cursor: pointer;
      font-size: 1.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 99;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }
    
    .back-to-top.visible {
      opacity: 1;
      visibility: visible;
    }
    
    .back-to-top:hover {
      background: var(--ink-light);
      transform: translateY(-3px);
      box-shadow: 0 6px 16px rgba(0,0,0,0.2);
    }
    
    @media (max-width: 600px) {
      .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 42px;
        height: 42px;
      }
    }

    .nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: var(--ink);
      border-bottom: 3px solid var(--accent);
    }
    
    .nav-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
      gap: 3rem;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 18px;
      cursor: pointer;
      transition: opacity 0.2s;
    }
    
    .logo:hover {
      opacity: 0.85;
    }
    
    .logo-kanji {
      font-size: 1.75rem;
      color: var(--accent);
      font-weight: 700;
      line-height: 0.95;
    }
    
    .logo-text {
      color: var(--paper);
      font-size: 1.35rem;
      font-weight: 600;
      letter-spacing: -0.02em;
      white-space: nowrap;
    }
    
    .nav-links {
      display: flex;
      gap: 1.75rem;
    }
    
    .nav-link {
      color: var(--paper);
      opacity: 0.7;
      font-size: 0.95rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
      padding: 0.5rem 0;
      border: none;
      background: none;
      position: relative;
      font-family: inherit;
    }
    
    .nav-link:hover, .nav-link.active {
      opacity: 1;
    }
    
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--accent);
    }
    
    /* PAGES */
    .page {
      min-height: 100vh;
      padding-top: 72px;
      display: none;
    }
    
    @media (max-width: 600px) {
      .page {
        padding-top: 100px;
      }
    }
    
    .page.active {
      display: block;
    }
    
    /* HOME PAGE */
    .home {
      display: flex;
      flex-direction: column;
    }
    
    .hero {
      min-height: calc(100vh - 72px);
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--ink) 0%, var(--ink-light) 100%);
      position: relative;
      overflow: hidden;
    }
    
    .hero::before {
      content: '活用';
      position: absolute;
      font-size: 35vw;
      color: rgba(255,255,255,0.02);
      font-family: 'Noto Serif JP', serif;
      font-weight: 700;
      pointer-events: none;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }
    
    .hero-content {
      text-align: center;
      padding: 3rem;
      position: relative;
      z-index: 1;
    }
    
    .hero-badge {
      display: inline-block;
      background: var(--accent);
      color: var(--paper);
      padding: 0.4rem 1rem;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 2rem;
    }
    
    .hero-title {
      color: var(--paper);
      font-size: clamp(2.5rem, 6vw, 4.5rem);
      font-weight: 700;
      letter-spacing: -0.03em;
      margin-bottom: 0.5rem;
      line-height: 1.1;
    }
    
    .hero-subtitle {
      color: var(--accent-soft);
      font-size: clamp(1.25rem, 3vw, 1.75rem);
      font-weight: 300;
      margin-bottom: 2rem;
    }
    
    .hero-desc {
      color: rgba(255,255,255,0.6);
      font-size: 1.1rem;
      max-width: 500px;
      margin: 0 auto 3rem;
      line-height: 1.7;
    }
    
    .hero-cta {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    .btn {
      display: inline-block;
      padding: 1rem 2rem;
      font-size: 1rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.25s;
      font-family: inherit;
    }
    
    .btn-primary {
      background: var(--accent);
      color: var(--paper);
    }
    
    .btn-primary:hover {
      background: var(--accent-soft);
      transform: translateY(-2px);
    }
    
    .btn-secondary {
      background: transparent;
      color: var(--paper);
      border: 2px solid rgba(255,255,255,0.3);
    }
    
    .btn-secondary:hover {
      border-color: var(--paper);
      background: rgba(255,255,255,0.05);
    }
    
    /* FEATURES */
    .features {
      padding: 6rem 2rem;
      background: var(--paper-warm);
    }
    
    .features-inner {
      max-width: 1000px;
      margin: 0 auto;
    }
    
    .features-header {
      text-align: center;
      margin-bottom: 4rem;
    }
    
    .features-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 0.75rem;
    }
    
    .features-subtitle {
      color: var(--text-light);
      font-size: 1.1rem;
    }
    
    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
    }
    
    .feature-card {
      background: var(--paper);
      padding: 2.5rem 2rem;
      border: 1px solid rgba(0,0,0,0.06);
      transition: all 0.3s;
      cursor: pointer;
    }
    
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
      border-color: var(--accent);
    }
    
    .feature-icon {
      font-size: 2rem;
      margin-bottom: 1.25rem;
    }
    
    .feature-title {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 0.75rem;
    }
    
    .feature-desc {
      color: var(--text-light);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    
    /* LEARN & FORMS PAGES */
    .learn-page, .forms-page {
      padding: 4rem 2rem;
      max-width: 900px;
      margin: 0 auto;
    }
    
    .page-header {
      margin-bottom: 3rem;
    }
    
    .page-tag {
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 0.75rem;
    }
    
    .page-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }
    
    .page-desc {
      color: var(--text-light);
      font-size: 1.1rem;
      line-height: 1.7;
    }
    
    .placeholder-card {
      background: var(--paper-warm);
      border: 2px dashed rgba(0,0,0,0.15);
      padding: 4rem 2rem;
      text-align: center;
    }
    
    .placeholder-icon {
      font-size: 3rem;
      margin-bottom: 1rem;
      opacity: 0.5;
    }
    
    .placeholder-text {
      color: var(--text-light);
      font-size: 1.1rem;
    }
    
    /* TABS */
    .tabs {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 2rem;
      border-bottom: 2px solid rgba(0,0,0,0.08);
      padding-bottom: 0.5rem;
    }
    
    .tab {
      padding: 0.75rem 1.5rem;
      font-size: 1rem;
      font-weight: 500;
      background: none;
      border: none;
      cursor: pointer;
      color: var(--text-light);
      transition: all 0.2s;
      font-family: inherit;
      position: relative;
    }
    
    .tab:hover {
      color: var(--ink);
    }
    
    .tab.active {
      color: var(--accent);
    }
    
    .tab.active::after {
      content: '';
      position: absolute;
      bottom: -0.6rem;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--accent);
    }
    
    .form-card {
      background: var(--paper);
      border: 1px solid rgba(0,0,0,0.08);
      padding: 2.5rem;
      display: none;
    }
    
    .form-card.active {
      display: block;
    }
    
    .form-card-title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 1rem;
    }
    
    .form-card-desc {
      color: var(--text-light);
      margin-bottom: 2rem;
      font-size: 1.05rem;
      line-height: 1.7;
    }
    
    .info-box {
      padding: 1.25rem 1.5rem;
      margin-bottom: 2rem;
      border-left: 4px solid;
    }
    
    .info-box.blue {
      background: #eef4f8;
      border-color: #4a90a4;
    }
    
    .info-box.green {
      background: #eef5ef;
      border-color: var(--sage);
    }
    
    .info-box.purple {
      background: #f3eef8;
      border-color: #7a5ba4;
    }
    
    .info-box.yellow {
      background: #fdf8ed;
      border-color: var(--gold);
    }
    
    .info-box-title {
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 0.5rem;
    }
    
    .info-box-text {
      color: var(--text);
      font-size: 0.95rem;
    }
    
    .section-title {
      font-weight: 600;
      margin-bottom: 1rem;
      color: var(--ink);
    }
    
    .pattern-box {
      background: var(--paper-warm);
      padding: 1.5rem;
      text-align: center;
      font-size: 1.25rem;
      margin-bottom: 2rem;
    }
    
    .conj-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      margin-bottom: 2rem;
    }
    
    .conj-table th,
    .conj-table td {
      border: 1px solid rgba(0,0,0,0.1);
      padding: 0.75rem 1rem;
      text-align: left;
    }
    
    .conj-table th {
      background: var(--ink);
      color: var(--paper);
      font-weight: 600;
    }
    
    .conj-table tr:nth-child(even) {
      background: var(--paper-warm);
    }
    
    .conj-table .highlight {
      font-weight: 600;
      color: var(--accent);
    }
    
    .row-a { color: #c45c4a; font-weight: 600; }
    .row-i { color: #7a9e7e; font-weight: 600; }
    .row-u { color: #4a90a4; font-weight: 600; }
    .row-e { color: #7a5ba4; font-weight: 600; }
    .row-o { color: #c9a962; font-weight: 600; }
    
    .forms-cta {
      margin-top: 3rem;
      text-align: center;
    }
    
    
    /* VERB LIST STYLES */
    .verb-list-tab {
      padding: 1rem 1.5rem;
      background: white;
      border: 2px solid transparent;
      border-radius: 4px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text);
      cursor: pointer;
      transition: all 0.2s;
      font-family: inherit;
    }

    .verb-list-tab:hover {
      background: white;
      border-color: var(--accent);
      color: var(--ink);
    }

    .verb-list-tab.active {
      background: white;
      color: var(--ink);
      border-color: var(--accent);
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }

    .verb-list-content {
      display: none;
    }

    .verb-list-content.active {
      display: grid !important;
    }

    .verb-item {
      background: white;
      border: 1px solid #e5e5e0;
      padding: 1.25rem 1.5rem;
      border-radius: 6px;
      transition: all 0.25s;
      cursor: default;
      position: relative;
    }

    /* Alternating pattern - every other card gets subtle background */
    .verb-item:nth-child(even) {
      background: #fafaf7;
    }

    .verb-item:hover {
      border-color: var(--accent);
      box-shadow: 0 6px 20px rgba(0,0,0,0.1);
      transform: translateY(-3px);
      background: white;
    }

    .verb-item .verb-kanji {
      font-size: 1.75rem !important;
      font-weight: 900 !important;
      color: #000000 !important;
      margin-bottom: 0.5rem;
      line-height: 1.2;
    }

    .verb-item .verb-reading {
      font-size: 0.95rem !important;
      color: #333333 !important;
      margin-bottom: 0.75rem;
      font-weight: 600 !important;
    }

    .verb-item .verb-meaning {
      font-size: 1rem !important;
      color: #1a1a1a !important;
      font-weight: 500 !important;
      border-top: 1px solid rgba(0,0,0,0.06);
      padding-top: 0.75rem;
      padding-right: 3rem; /* Make room for JLPT badge */
    }

    /* Search Input Styles */
    #verb-search:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(196, 92, 74, 0.1);
    }

    /* JLPT Filter Button Styles */
    .jlpt-filter-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }

    /* MISTAKE REPORT STYLES */
    .report-btn {
      padding: 0.75rem 1.5rem;
      background: var(--paper);
      color: var(--ink);
      border: 2px solid var(--ink);
      border-radius: 4px;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      font-family: inherit;
    }

    .report-btn:hover {
      background: var(--ink);
      color: var(--paper);
    }

    .report-btn:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }

    .reset-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.3rem;
      padding: 0.35rem 0.6rem;
      margin-top: 0.5rem;
      background: transparent;
      color: var(--text-light);
      border: 1px solid rgba(0,0,0,0.12);
      border-radius: 3px;
      font-size: 0.7rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
      font-family: inherit;
      position: relative;
      z-index: 100;
    }

    .reset-btn:hover {
      background: rgba(0,0,0,0.05);
      color: var(--ink);
      border-color: rgba(0,0,0,0.2);
    }

    .reset-btn svg {
      opacity: 0.6;
    }

    .reset-btn:hover svg {
      opacity: 1;
    }

    .report-modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.7);
      z-index: 10000;
      overflow-y: auto;
      padding: 2rem;
    }

    .report-modal.active {
      display: flex;
      align-items: flex-start;
      justify-content: center;
    }

    .report-content {
      background: var(--paper);
      border-radius: 8px;
      max-width: 900px;
      width: 100%;
      margin: 2rem auto;
      box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    }

    .report-header {
      background: var(--ink);
      color: var(--paper);
      padding: 2rem;
      border-radius: 8px 8px 0 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .report-close {
      background: none;
      border: none;
      color: var(--paper);
      font-size: 2rem;
      cursor: pointer;
      padding: 0;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      transition: background 0.2s;
    }

    .report-close:hover {
      background: rgba(255,255,255,0.1);
    }

    .report-download {
      background: rgba(255,255,255,0.15);
      border: 1px solid rgba(255,255,255,0.3);
      color: var(--paper);
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      padding: 0.5rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      border-radius: 6px;
      transition: all 0.2s;
      font-family: var(--font-sans);
    }

    .report-download:hover {
      background: rgba(255,255,255,0.25);
      border-color: rgba(255,255,255,0.5);
      transform: translateY(-1px);
    }

    .report-download svg {
      flex-shrink: 0;
    }

    .report-body {
      padding: 2rem;
      max-height: 70vh;
      overflow-y: auto;
    }

    .report-section {
      margin-bottom: 2.5rem;
    }

    .report-section-title {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .mistake-card {
      background: var(--paper-warm);
      border-left: 4px solid var(--accent);
      padding: 1.5rem;
      margin-bottom: 1.5rem;
      border-radius: 4px;
    }

    .mistake-card-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 0.75rem;
    }

    .mistake-stats {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
      margin-bottom: 2rem;
    }

    .mistake-stat {
      background: var(--paper-warm);
      padding: 1.5rem;
      border-radius: 4px;
      text-align: center;
      border: 1px solid rgba(0,0,0,0.06);
    }

    .mistake-stat-value {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 0.5rem;
    }

    .mistake-stat-label {
      font-size: 0.9rem;
      color: var(--text-light);
      font-weight: 500;
    }

    .advice-box {
      background: #e8f4f8;
      border-left: 4px solid #4a90a4;
      padding: 1.5rem;
      border-radius: 4px;
      margin-bottom: 1rem;
    }

    .advice-title {
      font-weight: 600;
      color: #357a8a;
      margin-bottom: 0.5rem;
      font-size: 1.05rem;
    }

    .advice-text {
      color: var(--text);
      line-height: 1.7;
    }

    .no-mistakes {
      text-align: center;
      padding: 3rem 2rem;
      color: var(--text-light);
    }

    .no-mistakes-icon {
      font-size: 4rem;
      margin-bottom: 1rem;
    }

    /* CONJUGATOR PAGE */
    .conjugator-page {
      padding: 4rem 2rem;
      max-width: 600px;
      margin: 0 auto;
    }
    
    .conjugator-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 2rem;
      flex-wrap: wrap;
      gap: 1rem;
    }

    @media (max-width: 768px) {
      .conjugator-header {
        flex-direction: column;
        align-items: stretch;
      }

      .conjugator-header > div:last-child {
        flex-direction: column-reverse;
        align-items: stretch;
      }

      .report-btn {
        width: 100%;
        margin-left: 0;
        margin-bottom: 0.5rem;
      }

      .score-box {
        text-align: center;
        align-items: center;
      }

      .score-box .reset-btn {
        margin: 0.5rem auto 0;
      }

      .report-header {
        flex-direction: column;
        gap: 1rem;
      }

      .report-header h2 {
        font-size: 1.5rem;
        text-align: center;
      }

      .report-header > div {
        width: 100%;
        justify-content: center;
      }

      .report-download {
        flex: 1;
      }
    }
    
    .score-box {
      text-align: right;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      position: relative;
      z-index: 50;
    }
    
    .score-label {
      font-size: 0.8rem;
      color: var(--text-light);
      text-transform: uppercase;
      letter-spacing: 0.1em;
    }
    
    .score-value {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--sage);
    }
    
    .form-select {
      width: 100%;
      padding: 0.875rem 1rem;
      font-size: 1rem;
      border: 2px solid rgba(0,0,0,0.1);
      background: var(--paper);
      font-family: inherit;
      cursor: pointer;
      margin-bottom: 1.5rem;
      transition: border-color 0.2s;
    }
    
    .form-select:focus {
      outline: none;
      border-color: var(--accent);
    }
    
    .verb-display {
      background: var(--ink);
      padding: 2.5rem;
      margin-bottom: 1.5rem;
      text-align: center;
    }
    
    .verb-type {
      color: var(--accent-soft);
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 0.75rem;
    }
    
    .verb-kanji {
      font-size: 3.5rem;
      color: var(--paper);
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    
    .verb-info {
      color: rgba(255,255,255,0.6);
      font-size: 1.15rem;
    }
    
    .prompt-row {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 0.75rem;
      gap: 1rem;
    }
    
    .prompt-text {
      font-weight: 500;
      color: var(--ink);
      flex: 1;
    }
    
    .prompt-form {
      color: var(--accent);
      font-weight: 600;
      display: block;
      font-size: 1.05rem;
      margin-top: 0.25rem;
      line-height: 1.4;
    }
    
    .hint-btn {
      background: none;
      border: none;
      color: var(--text-light);
      font-size: 0.9rem;
      cursor: pointer;
      font-family: inherit;
      white-space: nowrap;
      flex-shrink: 0;
      padding: 0.25rem 0.5rem;
    }
    
    .hint-btn:hover {
      color: var(--accent);
    }
    
    .hint-box {
      background: linear-gradient(135deg, #fdf8ed 0%, #fef9f0 100%);
      border-left: 3px solid var(--gold);
      padding: 1rem 1.25rem;
      margin-bottom: 1rem;
      font-size: 0.9rem;
      color: var(--text);
      display: none;
      border-radius: 0 4px 4px 0;
      line-height: 1.6;
    }
    
    .hint-box.visible {
      display: block;
    }
    
    .hint-box .hint-label {
      font-weight: 600;
      color: var(--gold);
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    
    .hint-box .hint-rule {
      background: rgba(255,255,255,0.7);
      padding: 0.5rem 0.75rem;
      border-radius: 4px;
      margin: 0.5rem 0;
      font-family: 'Noto Serif JP', serif;
    }
    
    .hint-box .hint-example {
      color: var(--text-light);
      font-size: 0.85rem;
      margin-top: 0.5rem;
    }
    
    .hint-box .hint-example strong {
      color: var(--sage);
    }
    
    .answer-input {
      width: 100%;
      padding: 1.25rem;
      font-size: 1.35rem;
      border: 2px solid rgba(0,0,0,0.1);
      background: var(--paper);
      font-family: 'Noto Serif JP', serif;
      text-align: center;
      margin-bottom: 1rem;
      transition: all 0.2s;
    }
    
    .answer-input:focus {
      outline: none;
      border-color: var(--ink);
    }
    
    .answer-input:disabled {
      background: var(--paper-warm);
    }
    
    .feedback {
      padding: 1.25rem;
      margin-bottom: 1rem;
      text-align: center;
      display: none;
    }
    
    .feedback.visible {
      display: block;
    }
    
    .feedback.warning {
      background: #fef3e6;
      border: 2px solid #e6a756;
    }
    
    .feedback.correct {
      background: #eef5ef;
      border: 2px solid var(--sage);
    }
    
    .feedback.incorrect {
      background: #fbeef0;
      border: 2px solid var(--accent);
    }
    
    .feedback-title {
      font-weight: 600;
      margin-bottom: 0.25rem;
    }
    
    .feedback-answer {
      font-size: 1.25rem;
    }
    
    .feedback-explanation {
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 1px solid rgba(0,0,0,0.1);
      text-align: left;
      font-size: 0.95rem;
      line-height: 1.6;
      color: var(--text);
      display: none;
    }
    
    .feedback-explanation strong {
      color: var(--accent);
    }
    
    .check-btn {
      width: 100%;
      padding: 1.125rem;
      font-size: 1.1rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s;
    }
    
    .check-btn.primary {
      background: var(--ink);
      color: var(--paper);
    }
    
    .check-btn.primary:hover:not(:disabled) {
      background: var(--ink-light);
    }
    
    .check-btn.primary:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }
    
    .check-btn.continue {
      background: var(--sage);
      color: var(--paper);
    }
    
    .check-btn.continue:hover {
      opacity: 0.9;
    }
    
    .check-btn.next {
      background: var(--sage);
      color: var(--paper);
      display: none;
    }
    
    .check-btn.next:hover {
      opacity: 0.9;
    }
    
    .skip-btn {
      width: 100%;
      padding: 0.75rem;
      margin-top: 0.5rem;
      font-size: 0.9rem;
      font-weight: 500;
      border: 1px solid rgba(0,0,0,0.15);
      background: transparent;
      color: var(--text-light);
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s;
    }
    
    .skip-btn:hover {
      background: rgba(0,0,0,0.03);
      color: var(--ink);
      border-color: rgba(0,0,0,0.25);
    }
    
    /* Responsive */
    @media (max-width: 600px) {
      .nav-inner {
        padding: 0 1rem;
        height: auto;
        min-height: 72px;
        flex-wrap: wrap;
        gap: 8px;
        padding-top: 12px;
        padding-bottom: 12px;
      }
      .nav-links {
        gap: 0.5rem;
        width: 100%;
        overflow-x: auto;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
      }
      .nav-links::-webkit-scrollbar {
        display: none;
      }
      .nav-link {
        font-size: 0.75rem;
        white-space: nowrap;
        padding: 0.4rem 0.6rem;
        flex-shrink: 0;
      }
      .logo-text {
        font-size: 1rem;
      }
      .logo-kanji {
        font-size: 1.25rem;
        line-height: 0.95;
      }
      .hero-content {
        padding: 2rem 1rem;
      }
      .features {
        padding: 4rem 1rem;
      }
      .tabs {
        flex-wrap: wrap;
      }
      .tab {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
      }
    }

/* === Added for multi-page split: nav links are now anchors === */
a.nav-link {
  text-decoration: none;
  display: inline-block;
}