:root {
    --primary-color: #059669;
    --primary-dark: #047857;
    --primary-light: #34d399;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --card-bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --success-color: #22c55e;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #064e3b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 0;
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-light);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

header h1 i {
    color: var(--primary-color);
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Tabs Navigation */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 10px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
    min-width: 120px;
}

.tab-btn:hover {
    background: var(--card-bg-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.card h2 {
    color: var(--primary-light);
    margin-bottom: 20px;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card h2 i {
    color: var(--primary-color);
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* Forms */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.form-group {
    margin-bottom: 15px;
    align-self: center;
    place-items: center;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.checkbox-group{
    margin:0px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    margin: 0;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    accent-color: var(--primary-color);
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    width: 100%;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.4);
}

.btn-secondary {
    background: var(--card-bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #16a34a;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Filter Row */
.filter-row {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-row input,
.filter-row select {
    flex: 1;
    min-width: 150px;
    padding: 10px 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
}

/* Split info box */
.split-info {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 3px solid var(--primary-color);
}

.split-info h4 {
    color: var(--primary-light);
    margin-bottom: 8px;
    font-size: 1rem;
}

.split-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.split-day {
    display: inline-block;
    background: var(--card-bg-hover);
    padding: 4px 10px;
    border-radius: 4px;
    margin: 3px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Exercises Grid */
.exercises-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

.exercise-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.exercise-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.exercise-card.favorite {
    border-color: var(--warning-color);
    background: linear-gradient(135deg, var(--bg-color) 0%, rgba(245, 158, 11, 0.1) 100%);
}

.exercise-card .exercise-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 10px;
}

.exercise-card h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin: 0;
}

.exercise-card .category-badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.exercise-card .rm-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-light);
    margin: 10px 0;
}

.exercise-card .rm-value span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: normal;
}

.exercise-card .exercise-actions {
    display: flex;
    gap: 8px;
    margin-top: 15px;
}

.exercise-card .btn-icon {
    padding: 8px 12px;
    background: var(--card-bg-hover);
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.exercise-card .btn-icon:hover {
    background: var(--primary-color);
    color: white;
}

.exercise-card .favorite-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.exercise-card .favorite-btn.active {
    color: var(--warning-color);
}

.exercise-card .favorite-btn:hover {
    transform: scale(1.2);
}

/* RM Calculator */
.rm-calculator {
    padding: 10px 0;
}

.rm-result {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 10px;
    animation: fadeIn 0.3s ease;
}

.rm-result.hidden {
    display: none;
}

.result-box {
    text-align: center;
    margin-bottom: 20px;
}

.result-label {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.result-value {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-light);
}

.result-unit {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.percentages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.percentage-item {
    background: var(--card-bg);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.percentage-item span:first-child {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.percentage-item span:last-child {
    font-weight: bold;
    color: var(--primary-light);
}

/* Checkbox exercises list */
.checkbox-exercises-list {
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-color);
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
}

.checkbox-exercise-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.checkbox-exercise-item:hover {
    background: var(--card-bg-hover);
}

.checkbox-exercise-item:last-child {
    border-bottom: none;
}

.checkbox-exercise-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    accent-color: var(--primary-color);
}

.checkbox-exercise-item .exercise-info {
    flex: 1;
}

.checkbox-exercise-item .exercise-name {
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox-exercise-item .exercise-rm {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Mesocycles Grid */
.mesocycles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.mesocycle-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mesocycle-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.mesocycle-card h4 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.mesocycle-card .meso-meta {
    display: flex;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.mesocycle-card .meso-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Session Styles */
.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.session-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.meso-select {
    padding: 12px 15px;
    background: var(--bg-color);
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    min-width: 250px;
}

.session-date {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.session-actions {
    display: flex;
    gap: 10px;
}

.session-content {
    min-height: 400px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--border-color);
}

.empty-state p {
    font-size: 1.1rem;
}

/* Session Exercise Cards */
.session-exercise {
    background: var(--bg-color);
    border-radius: 12px;
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    max-height: calc(100dvh - 4rem);
    overflow: auto;
}

.session-exercise-header {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--bg-color) 100%);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.session-exercise-info h4 {
    color: var(--text-primary);
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.session-exercise-info .exercise-rm {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.session-exercise-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.session-exercise-actions .btn {
    flex: 1;
    min-width: 120px;
    justify-content: center;
}

.sets-container {
    padding: 20px;
}

.set-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    padding: 12px;
    background: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 10px;
    position: relative;
}

.set-row:last-child {
    margin-bottom: 0;
}

.set-number {
    font-weight: bold;
    color: var(--primary-light);
    text-align: center;
    min-width: 40px;
    flex: 0 0 auto;
}

.set-field {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 80px;
}

.set-field label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.set-field input {
    padding: 8px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    text-align: center;
    font-size: 0.95rem;
    width: 100%;
    min-width: 60px;
}

.set-field input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.set-completed {
    display: flex;
    justify-content: center;
    flex: 0 0 auto;
    position: absolute;
    top: -.5rem;
    right: -.5rem;
}

.set-completed input[type="checkbox"] {
    width: 24px;
    height: 24px;
    accent-color: var(--success-color);
}

.set-remove-btn {
    flex: 0 0 auto;
    min-width: 80px;
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.set-row {
    position: relative;
}

.set-remove-btn:hover {
    background: #dc2626;
}

.add-set-btn {
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    background: var(--card-bg-hover);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.add-set-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-light);
    background: rgba(5, 150, 105, 0.1);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Chart Container */
.chart-container {
    height: 300px;
    margin: 20px 0;
    background: var(--bg-color);
    border-radius: 8px;
    padding: 15px;
}

/* Records List */
.records-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.record-item {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid var(--warning-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.record-item .record-info h4 {
    color: var(--text-primary);
    margin-bottom: 5px;
}

.record-item .record-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.record-item .record-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--warning-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

.modal-large .modal-content {
    max-width: 800px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-btn:hover {
    color: var(--danger-color);
}

.modal form {
    padding: 25px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
}

/* Set Config Modal */
.set-config {
    padding: 25px;
}

.weight-preview {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    text-align: center;
}

.weight-preview strong {
    color: var(--primary-light);
    font-size: 1.3rem;
}

/* Meso Detail Content */
.meso-detail-content {
    padding: 25px;
    max-height: 60vh;
    overflow-y: auto;
}

.meso-exercise-detail {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.meso-exercise-detail h5 {
    color: var(--primary-light);
    margin-bottom: 10px;
}

.meso-exercise-detail .sets-preview {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.set-preview-item {
    background: var(--card-bg);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        min-width: calc(50% - 5px);
        font-size: 0.9rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .exercises-grid,
    .mesocycles-grid {
        grid-template-columns: 1fr;
    }
    
    .set-row {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        padding: 10px;
        position: relative;
    }

    .set-row .set-number {
        flex: 0 0 35px;
        min-width: 35px;
        font-size: 0.95rem;
    }

    .set-row .set-field {
        flex: 1;
        min-width: 55px;
    }

    .set-row .set-field label {
        font-size: 0.65rem;
        margin-bottom: 2px;
    }

    .set-row .set-field input {
        padding: 6px;
        font-size: 0.85rem;
    }

    .set-row .set-completed {
        flex: 0 0 auto;
        order: 0;
    }

    .set-row .set-completed input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }

    .set-row .set-remove-btn {
        flex: 0 0 auto;
        min-width: 60px;
        padding: 6px 8px;
        font-size: 0.85rem;
    }

    .set-field label {
        font-size: 0.7rem;
    }

    .set-field input {
        padding: 8px;
        font-size: 0.9rem;
        min-width: 50px;
    }

    .session-header {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
    }
    
    .session-info {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        width: 100%;
    }
    
    .meso-select {
        width: 100%;
        min-width: unset;
    }
    
    .session-date {
        text-align: center;
        font-size: 0.9rem;
    }
    
    .session-actions {
        flex-direction: row;
        flex-wrap: wrap;
        width: 100%;
        gap: 8px;
    }
    
    .session-actions .btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
        font-size: 0.9rem;
        padding: 10px 15px;
    }
    
    .session-exercise-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        z-index: 1;
    }
    
    .session-exercise-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .session-exercise-actions .btn {
        width: 100%;
        min-width: unset;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .percentages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-btn {
        min-width: 100%;
    }
    
    .modal-content {
        margin: 10px;
        max-height: 95vh;
    }
    
    /* Layout en 1 columna para móvil pequeño */
    .session-exercise-header {
        position: sticky;
        left: 0px;
    }

    .sets-container {
        display:inline-grid;
        gap:1rem;
    }

    .set-row {
        grid-row:1;
        min-width: 16rem;
    }

    .add-set-btn{
        position:sticky;
        left: calc(50% - 8rem - 1px);
        min-width: 100%;
    }
    
    .set-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 35px 10px 10px 10px;
    }

    .set-row .set-number {
        width: 100%;
        text-align: left;
        font-size: 1.1rem;
        margin-bottom: 5px;
    }

    .set-row .set-field {
        width: 100%;
        flex: none;
    }

    .set-row .set-completed {
        position: absolute;
        top: 8px;
        right: 8px;
    }

    .set-row .set-remove-btn {
        width: 100%;
        margin-top: 5px;
        flex: none;
    }

    .set-field label {
        font-size: 0.85rem;
    }

    .set-field input {
        padding: 10px;
        font-size: 1rem;
        width: 100%;
        min-width: unset;
    }

    .session-actions {
        flex-direction: column;
    }
    
    .session-actions .btn {
        width: 100%;
        min-width: unset;
    }
    
    .session-exercise-actions {
        flex-direction: column;
    }
    
    .session-exercise-actions .btn {
        width: 100%;
        min-width: unset;
    }
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--card-bg-hover);
}

/* Animations */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.slide-in {
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Sessions History Styles */
.sessions-history-list {
    max-height: 600px;
    overflow-y: auto;
}

.session-history-item {
    background: var(--bg-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.session-history-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.session-history-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}

.session-history-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.session-history-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.session-history-meta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    justify-content: center;
}

.session-history-meta span {
    background: var(--card-bg-hover);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.session-history-exercises {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: space-evenly;
}

.session-history-exercise {
    background: var(--card-bg);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-primary);
    border-left: 3px solid var(--primary-color);
}

.session-detail-modal .exercise-detail {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.session-detail-modal .exercise-detail h4 {
    color: var(--primary-light);
    margin-bottom: 10px;
    font-size: 1rem;
}

.session-detail-modal .sets-detail {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
}

.session-detail-modal .set-detail-item {
    background: var(--card-bg);
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    font-size: 0.9rem;
}

.session-detail-modal .set-detail-item.completed {
    border: 1px solid var(--success-color);
}

/* Automatrón Styles */
.auto-btn {
    background: linear-gradient(135deg, #059669 0%, #10b981 50%, #34d399 100%);
    color: white !important;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    border: 2px solid rgba(16, 185, 129, 0.5);
}

.auto-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 70%
    );
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

.auto-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.6), 0 0 30px rgba(16, 185, 129, 0.3);
}

.auto-btn.active {
    background: linear-gradient(135deg, #047857 0%, #059669 50%, #10b981 100%);
    box-shadow: 0 0 25px rgba(16, 185, 129, 0.8), inset 0 0 20px rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Category Checkbox Group */
.category-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    justify-content: center;
}

.checkbox-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.checkbox-inline:hover {
    background: var(--card-bg-hover);
    border-color: var(--primary-color);
}

.checkbox-inline input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.checkbox-inline:has(input[type="checkbox"]:checked) {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}