.grid-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 56px 24px 96px;
    }

    .section-title {
      font-family: var(--font-display);
      font-size: clamp(28px, 3.5vw, 36px);
      font-weight: 400;
      letter-spacing: -0.02em;
      color: var(--text-primary);
      margin-bottom: 28px;
    }

    .sim-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    .sim-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 28px;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
      transition: all var(--transition);
    }

    .sim-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--accent-color);
      opacity: 0.6;
      transition: opacity var(--transition);
    }

    .sim-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--accent-color);
      transform: translateY(-3px);
      box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    }

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

    .sim-card.red    { --accent-color: var(--red-bright); }
    .sim-card.orange { --accent-color: var(--orange); }
    .sim-card.purple { --accent-color: var(--purple); }

    .sim-header {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 16px;
    }

    .sim-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
    }

    .sim-info { flex: 1; }

    .sim-badge {
      display: inline-block;
      padding: 3px 10px;
      border-radius: 4px;
      font-family: var(--font-mono);
      font-size: 9px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 8px;
    }

    .badge-rapid     { color: var(--red-bright);   background: rgba(239,68,68,0.08);   border: 1px solid rgba(239,68,68,0.18); }
    .badge-timed     { color: var(--orange);       background: rgba(249,115,22,0.08);  border: 1px solid rgba(249,115,22,0.18); }
    .badge-challenge { color: var(--purple);       background: rgba(168,85,247,0.08);  border: 1px solid rgba(168,85,247,0.18); }

    .sim-card h3 {
      font-family: var(--font-body);
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.01em;
      margin: 0;
    }

    .sim-description {
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-secondary);
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .sim-meta {
      display: flex;
      gap: 14px;
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-muted);
      margin-bottom: 18px;
    }

    .sim-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 22px;
      background: var(--accent-color);
      color: #fff;
      text-decoration: none;
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 14px;
      border-radius: 8px;
      border: none;
      transition: all var(--transition);
      cursor: pointer;
    }

    .sim-btn:hover {
      filter: brightness(1.1);
      box-shadow: 0 4px 24px var(--accent-color);
      transform: translateY(-1px);
    }

    .sim-btn:disabled {
      opacity: 0.4;
      cursor: not-allowed;
      filter: none;
    }

    .sim-btn:disabled:hover {
      transform: none;
      box-shadow: none;
    }

    /* Info box */
    .info-box {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-left: 3px solid var(--cyan);
      border-radius: 12px;
      padding: 28px;
      margin-top: 56px;
    }

    .info-box h3 {
      font-family: var(--font-display);
      font-size: 22px;
      font-weight: 400;
      color: var(--text-primary);
      margin-bottom: 10px;
    }

    .info-box p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin: 0;
    }

    @media (max-width: 768px) {
      .grid-container { padding: 32px 20px 64px; }
    }