body {
            font-family: var(--font-family);
            background-color: var(--color-bg);
            color: var(--color-text-main);
            line-height: 1.5;
        }

        a { text-decoration: none; }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        ul { list-style: none; }
        .hidden { display: none !important; }

        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
        .main-content { padding-top: 2rem; }

        .app-header {
            background: linear-gradient(to right, var(--color-primary-dark), var(--color-primary-light));
            color: var(--color-surface);
            padding: 1.5rem 0;
            box-shadow: var(--shadow-lg);
        }

        .header-content {
            display: flex; flex-direction: column; justify-content: space-between; align-items: center; gap: 1rem;
        }

        .header-title h1 { font-size: 1.875rem; font-weight: 700; letter-spacing: -0.025em; }
        
        .header-stats { display: flex; gap: 2rem; align-items: center; justify-content: center; flex-wrap: wrap; }
        
        .header-info { text-align: center; }
        .header-info-label { font-size: 0.875rem; color: var(--color-text-light); }
        .header-info-date { font-size: 1.5rem; font-weight: 700; color: var(--color-secondary); }

        .streak-tracker {
            background: rgba(0,0,0,0.15);
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .btn-streak {
            font-weight: 700; width: 100%; margin-bottom: 0.5rem; padding: 0.5rem 1rem;
            border-radius: var(--radius-md); transition: var(--transition-default); box-shadow: var(--shadow-sm);
        }
        .btn-streak-todo { background-color: var(--color-secondary); color: #854d0e; }
        .btn-streak-done { background-color: #10b981; color: #ffffff; cursor: default; }
        
        .streak-current { font-size: 1.125rem; font-weight: bold; color: var(--color-secondary); line-height: 1.2; }
        .streak-best { font-size: 0.75rem; color: var(--color-text-light); margin-top: 0.25rem; }

        .tabs-nav {
            display: flex; border-bottom: 1px solid #d1d5db; margin-bottom: 1.5rem; overflow-x: auto; white-space: nowrap;
        }

        .tab-btn { padding: 0.75rem 1.5rem; color: var(--color-text-muted); font-weight: 400; transition: var(--transition-default); }
        .tab-btn:hover { color: var(--color-text-main); }
        .tab-btn.active { border-bottom: 3px solid var(--color-primary); color: var(--color-primary); font-weight: 600; }

        .tab-content { display: none; animation: fadeIn 0.4s ease-in-out; }
        .tab-content.active { display: block; }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(5px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .alert-info {
            background-color: var(--color-phase3-light); border-left: 4px solid var(--color-primary);
            padding: 1rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; box-shadow: var(--shadow-sm);
        }
        .alert-title { font-weight: 600; color: var(--color-primary-dark); margin-bottom: 0.25rem; }
        .alert-text { font-size: 0.875rem; color: var(--color-primary-dark); }

        .fases-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }

        .glass-card {
            background: var(--color-surface-glass); backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-xl);
            padding: 1.5rem; box-shadow: var(--shadow-md);
        }

        .glass-card.phase-1 { border-top: 4px solid var(--color-phase1); }
        .glass-card.phase-2 { border-top: 4px solid var(--color-phase2); }
        .glass-card.phase-3 { border-top: 4px solid var(--color-phase3); }
        .glass-card.phase-4 { border-top: 4px solid var(--color-phase4); }

        .card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
        .card-title { font-size: 1.25rem; font-weight: 700; }
        .card-badge { font-size: 0.75rem; font-weight: 700; padding: 0.25rem 0.5rem; border-radius: var(--radius-md); }

        .badge-1 { background-color: var(--color-phase1-light); color: var(--color-phase1); }
        .badge-2 { background-color: var(--color-phase2-light); color: var(--color-phase2); }
        .badge-3 { background-color: var(--color-phase3-light); color: var(--color-phase3); }
        .badge-4 { background-color: var(--color-phase4-light); color: var(--color-phase4); }

        .glass-card { transition: var(--transition-default); }
        .phase-completed { order: 99; filter: grayscale(100%); opacity: 0.6; border-top-color: #d1d5db !important; background: #e5e7eb !important; }
        .phase-check-label { font-size: 0.75rem; color: var(--color-text-main); cursor: pointer; display: flex; align-items: center; gap: 0.25rem; font-weight: normal; }

        .card-desc { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 1rem; }
        .task-list { display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.875rem; }

        .icon-p1 { color: var(--color-phase1); }
        .icon-p2 { color: var(--color-phase2); }
        .icon-p3 { color: var(--color-phase3); }
        .icon-p4 { color: var(--color-phase4); }

        .priority-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-md); }
        .priority-header { text-align: center; margin-bottom: 2rem; }
        .priority-list { display: flex; flex-direction: column; gap: 1rem; max-width: 800px; margin: 0 auto; }

        .priority-item { position: relative; padding: 1rem 1rem 1rem 1.5rem; border-radius: var(--radius-md); border: 1px solid transparent; overflow: hidden; }
        .priority-high { background-color: var(--color-phase1-light); border-color: #fca5a5; }
        .priority-med { background-color: #fef9c3; border-color: #fde047; }
        .priority-low { background-color: #f3f4f6; border-color: #e5e7eb; }

        .priority-indicator { position: absolute; left: 0; top: 0; bottom: 0; width: 8px; }
        .priority-high .priority-indicator { background-color: var(--color-phase1); }
        .priority-med .priority-indicator { background-color: #eab308; }
        .priority-low .priority-indicator { background-color: #9ca3af; }

        .priority-item-title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; }
        .priority-high .priority-item-title { color: #991b1b; }
        .priority-med .priority-item-title { color: #854d0e; }
        .priority-low .priority-item-title { color: #374151; }

        .priority-item-desc { font-size: 0.875rem; color: var(--color-text-main); margin-bottom: 0.5rem; }
        .priority-subjects { display: grid; grid-template-columns: 1fr; gap: 0.5rem; font-size: 0.875rem; margin-top: 0.5rem; }

        .checklist-wrapper { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-md); }
        .checklist-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
        
        .btn-reset { background-color: #e5e7eb; color: var(--color-text-main); padding: 0.25rem 0.75rem; border-radius: var(--radius-md); font-size: 0.875rem; transition: var(--transition-default); }
        .btn-reset:hover { background-color: #d1d5db; }

        .checklist-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
        .checklist-category { background-color: var(--color-bg); padding: 1rem; border-radius: var(--radius-lg); border: 1px solid #e5e7eb; }
        .checklist-category-title { font-weight: 700; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid #d1d5db; }

        .check-container { display: block; position: relative; padding-left: 35px; margin-bottom: 12px; cursor: pointer; font-size: 15px; user-select: none; color: var(--color-text-main); transition: var(--transition-default); }
        .check-container input { position: absolute; opacity: 0; cursor: pointer; height: 0; width: 0; }
        .checkmark { position: absolute; top: 0; left: 0; height: 22px; width: 22px; background-color: #e5e7eb; border-radius: 5px; transition: var(--transition-default); }
        .check-container:hover input ~ .checkmark { background-color: #d1d5db; }
        .check-container input:checked ~ .checkmark { background-color: var(--color-phase4); }
        .checkmark:after { content: ""; position: absolute; display: none; }
        .check-container input:checked ~ .checkmark:after { display: block; left: 8px; top: 4px; width: 6px; height: 12px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); }
        .checked-text { text-decoration: line-through; color: var(--color-text-muted); }

        .backup-card { max-width: 600px; margin: 0 auto; }
        .backup-actions { display: flex; gap: 1rem; flex-direction: column; align-items: center; }
        .btn-full { width: 100%; max-width: 400px; }
        .btn-success { background: linear-gradient(to right, #10b981, #047857); }
        
        .divider-wrapper { width: 100%; max-width: 400px; position: relative; text-align: center; margin: 1rem 0; }
        .divider-line { border: 0; border-top: 1px solid #d1d5db; }
        .divider-text { position: absolute; top: -10px; left: 50%; transform: translateX(-50%); background: var(--color-surface); padding: 0 10px; color: var(--color-text-muted); font-size: 0.875rem; }

        .cta-section { text-align: center; margin-top: 3rem; padding-bottom: 2rem; }
        .btn-cta { display: inline-block; background: linear-gradient(to right, var(--color-primary-light), var(--color-primary-dark)); color: var(--color-surface); font-weight: 700; padding: 1rem 2rem; border-radius: var(--radius-pill); box-shadow: var(--shadow-lg); font-size: 1.125rem; transition: transform 0.3s ease, box-shadow 0.3s ease; }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 15px 20px -5px rgba(0, 0, 0, 0.2); }
        .cta-desc { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 0.5rem; }

        @media (min-width: 768px) {
            .header-content { flex-direction: row; text-align: left; }
            .fases-grid { grid-template-columns: repeat(2, 1fr); }
            .priority-subjects { grid-template-columns: repeat(2, 1fr); }
            .checklist-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (min-width: 1024px) {
            .checklist-grid { grid-template-columns: repeat(3, 1fr); }
        }