:root {
      --bg-main: #f8f6f0;
      --bg-alt: #eee8dc;
      --bg-card: #ffffff;
      --bg-glass: rgba(255, 255, 255, 0.72);
      --text-main: #181c19;
      --text-muted: #56615a;
      --border-color: #ded8cb;
      
      --bg-footer: #152c20;
      --accent-main: #1b3b2b;
      --accent-hover: #29543e;
      --accent-light: #e3ebd9;
      --accent-pop: #34d399;
      --shadow-color: rgba(0, 0, 0, 0.04);
      --shadow-elevated: 0 12px 32px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);

      --btn-text: #ffffff;
      --glow-drop: none;

      --font-main: -apple-system, BlinkMacSystemFont, "Plus Jakarta Sans", sans-serif;
      --font-code: "JetBrains Mono", monospace;
    }

    body.glow-active {
      --glow-drop: drop-shadow(0 0 10px var(--accent-main));
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      transition: background-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                  color 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                  border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                  box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                  transform 0.2s ease,
                  filter 0.3s ease;
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    main {
      flex: 1;
    }

    header {
      background-color: var(--bg-glass);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border-bottom: 1px solid var(--border-color);
      padding: 0.85rem 2rem;
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .nav-container {
      max-width: 1140px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      text-decoration: none;
      letter-spacing: -0.022em;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .logo-badge {
      font-size: 0.68rem;
      background: var(--accent-light);
      color: var(--accent-main);
      padding: 0.2rem 0.55rem;
      border-radius: 20px;
      font-weight: 600;
      letter-spacing: -0.01em;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }

    nav ul {
      display: flex;
      list-style: none;
      gap: 1.8rem;
    }

    nav a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      font-weight: 500;
      letter-spacing: -0.01em;
    }

    nav a:hover {
      color: var(--accent-main);
    }

    .mode-switch-wrapper {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      background-color: var(--bg-alt);
      padding: 0.3rem 0.5rem;
      border-radius: 30px;
      border: 1px solid var(--border-color);
      cursor: pointer;
    }

    .mode-icon {
      width: 15px;
      height: 15px;
      fill: none;
      stroke: var(--text-muted);
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
      display: flex;
      align-items: center;
    }

    .switch {
      position: relative;
      display: inline-block;
      width: 36px;
      height: 20px;
    }

    .switch input {
      opacity: 0;
      width: 0;
      height: 0;
    }

    .slider {
      position: absolute;
      cursor: pointer;
      top: 0; left: 0; right: 0; bottom: 0;
      background-color: rgba(120, 120, 128, 0.2);
      transition: .3s cubic-bezier(0.16, 1, 0.3, 1);
      border-radius: 30px;
    }

    .slider:before {
      position: absolute;
      content: "";
      height: 16px;
      width: 16px;
      left: 2px;
      bottom: 2px;
      background-color: #ffffff;
      box-shadow: 0 2px 4px rgba(0,0,0,0.2);
      transition: .3s cubic-bezier(0.16, 1, 0.3, 1);
      border-radius: 50%;
    }

    input:checked + .slider {
      background-color: var(--accent-main);
    }

    input:checked + .slider:before {
      transform: translateX(16px);
    }

    .hero {
      text-align: center;
      padding: 5rem 1rem 3.5rem 1rem;
      max-width: 760px;
      margin: 0 auto;
    }

    .hero h1 {
      font-size: 3.2rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.08;
      margin-bottom: 1.2rem;
    }

    .hero h1 span {
      color: var(--accent-main);
      filter: var(--glow-drop);
    }

    .hero p {
      font-size: 1.15rem;
      color: var(--text-muted);
      font-weight: 400;
      letter-spacing: -0.015em;
      max-width: 620px;
      margin: 0 auto;
    }

    .preview-section {
      max-width: 1140px;
      margin: 0 auto 4rem auto;
      padding: 0 1.5rem;
    }

    .preview-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 2.2rem;
      box-shadow: var(--shadow-elevated);
    }

    .preview-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 2rem;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 1.2rem;
    }

    .preview-header-actions {
      display: flex;
      gap: 0.8rem;
      align-items: center;
    }

    .preview-header h2 {
      font-size: 1.25rem;
      font-weight: 600;
      letter-spacing: -0.02em;
    }

    .preview-components {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }

    .component-box {
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 1.4rem;
      background-color: var(--bg-alt);
    }

    .component-box h4 {
      margin-bottom: 0.8rem;
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: var(--text-muted);
      font-weight: 600;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent-main);
      color: var(--btn-text);
      font-family: var(--font-main);
      font-size: 0.88rem;
      font-weight: 600;
      padding: 0.65rem 1.25rem;
      border: none;
      border-radius: 980px;
      cursor: pointer;
      gap: 0.5rem;
      letter-spacing: -0.01em;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      filter: var(--glow-drop);
    }

    .btn:hover {
      background-color: var(--accent-hover);
      transform: scale(1.015);
    }

    .btn-secondary {
      background-color: var(--accent-light);
      color: var(--accent-main);
      border: 1px solid var(--border-color);
      filter: none;
    }

    .btn-secondary:hover {
      background-color: var(--border-color);
      transform: scale(1.015);
    }

    .btn-glow-toggle {
      background-color: var(--bg-alt);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 0.82rem;
      padding: 0.5rem 0.95rem;
      border-radius: 980px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .btn-glow-toggle .btn-icon {
      width: 14px;
      height: 14px;
      stroke: var(--text-muted);
      stroke-width: 2;
      fill: none;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: all 0.25s ease;
    }

    .btn-glow-toggle:hover {
      border-color: var(--accent-main);
      color: var(--text-main);
    }

    .btn-glow-toggle:hover .btn-icon {
      stroke: var(--accent-main);
    }

    .btn-glow-toggle.active {
      background-color: var(--accent-light);
      color: var(--accent-main);
      border-color: var(--accent-main);
    }

    .btn-glow-toggle.active .btn-icon {
      stroke: var(--accent-main);
      fill: var(--accent-main);
    }

    .pop-badge {
      color: var(--accent-pop);
      font-weight: 700;
      font-size: 0.85rem;
    }

    .section-header {
      max-width: 1140px;
      margin: 3.5rem auto 1.5rem auto;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      gap: 1.2rem;
    }

    .section-header h2 {
      font-size: 1.4rem;
      font-weight: 700;
      letter-spacing: -0.025em;
    }

    .section-header .line {
      height: 1px;
      background-color: var(--border-color);
      flex: 1;
    }

    .themes-grid {
      max-width: 1140px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 1.5rem;
      padding: 0 1.5rem;
    }

    .theme-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-color);
    }

    .theme-card:hover {
      border-color: var(--accent-main);
      box-shadow: var(--shadow-elevated);
      transform: translateY(-2px);
    }

    .theme-card h3 {
      font-size: 1.1rem;
      font-weight: 600;
      letter-spacing: -0.018em;
      margin-bottom: 0.3rem;
    }

    .theme-card p {
      color: var(--text-muted);
      font-size: 0.85rem;
      margin-bottom: 1.25rem;
      min-height: 2.5em;
      line-height: 1.45;
    }

    .color-swatches {
      display: flex;
      gap: 0.4rem;
      margin-bottom: 1.4rem;
      background-color: var(--bg-alt);
      padding: 0.4rem;
      border-radius: 10px;
      border: 1px solid var(--border-color);
    }

    .swatch {
      flex: 1;
      height: 32px;
      border-radius: 6px;
    }

    .theme-actions {
      display: flex;
      gap: 0.5rem;
    }

    .theme-actions button {
      flex: 1;
    }

    .code-box {
      background-color: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 1rem;
      color: var(--accent-main);
      font-family: var(--font-code);
      font-size: 0.78rem;
      white-space: pre-wrap;
      max-height: 170px;
      overflow-y: auto;
      margin-top: 1rem;
      display: none;
    }

    .code-box.active {
      display: block;
    }

    .ai-section {
      max-width: 1140px;
      margin: 5rem auto 2rem auto;
      padding: 0 1.5rem;
    }

    .ai-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 22px;
      padding: 2.8rem;
      box-shadow: var(--shadow-elevated);
      position: relative;
      overflow: hidden;
    }

    .ai-card-header {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 0.4rem;
    }

    .ai-badge-icon {
      width: 22px;
      height: 22px;
      stroke: var(--accent-main);
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .ai-card h2 {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: -0.025em;
    }

    .ai-input-group {
      display: flex;
      gap: 0.8rem;
      margin-top: 1.6rem;
      margin-bottom: 2rem;
    }

    .ai-input {
      flex: 1;
      padding: 0.85rem 1.2rem;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-main);
      font-size: 0.95rem;
      outline: none;
    }

    .ai-input:focus {
      border-color: var(--accent-main);
    }

    .svg-btn-icon {
      width: 16px;
      height: 16px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2.2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .toast {
      position: fixed;
      bottom: 28px;
      right: 28px;
      background-color: var(--accent-main);
      color: var(--btn-text);
      padding: 0.75rem 1.4rem;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: 980px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      transform: translateY(150%);
      transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      z-index: 2000;
    }

    .toast.show {
      transform: translateY(0);
    }

    footer {
      background-color: var(--bg-footer);
      color: var(--text-muted);
      text-align: center;
      padding: 3.5rem 1rem;
      margin-top: 5rem;
      font-size: 0.85rem;
      letter-spacing: -0.01em;
    }

    @media (max-width: 768px) {
      .nav-container { flex-direction: column; gap: 0.8rem; }
      .hero h1 { font-size: 2.4rem; }
      .preview-header { flex-direction: column; gap: 1rem; text-align: center; }
      .ai-input-group { flex-direction: column; }
    }