/* Training Tracker Pro - Professional Glassmorphism Design */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    --strength-color: #ef4444;
    --cardio-color: #f59e0b;
    --flexibility-color: #10b981;
    --custom-color: #8b5cf6;
    
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: rgba(255, 255, 255, 0.25);
    --card-border: rgba(255, 255, 255, 0.18);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #ffffff;
    
    --shadow-light: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --shadow-heavy: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
    
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 30px;
}

.header-content h1 {
    color: var(--text-light);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    font-weight: 300;
}

.header-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: var(--primary-color);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Section Styles */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-header h2 {
    color: var(--text-light);
    font-size: 1.8rem;
    font-weight: 600;
}

.section-header h3 {
    color: var(--text-light);
    font-size: 1.4rem;
    font-weight: 600;
}

.hidden {
    display: none !important;
}

/* Dashboard Controls */
.dashboard-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.dashboard-controls select {
    padding: 10px 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1.5rem;
}

.stat-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 5px;
}

.stat-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.stat-trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.stat-trend.positive {
    color: var(--success-color);
}

.stat-trend.negative {
    color: var(--danger-color);
}

.stat-trend.neutral {
    color: var(--warning-color);
}

/* Charts Container */
.charts-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
    margin-bottom: 40px;
}

.chart-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 25px;
    transition: var(--transition);
}

.chart-card.main-chart {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.chart-header h3 {
    color: var(--text-light);
    font-size: 1.2rem;
    font-weight: 600;
}

.chart-controls {
    display: flex;
    gap: 5px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 4px;
}

.chart-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

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

.chart-container {
    position: relative;
    height: 250px;
}

.chart-card.main-chart .chart-container {
    height: 350px;
}

/* Activity Legend */
.activity-legend {
    display: flex;
    gap: 15px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.legend-color.high {
    background: var(--danger-color);
}

.legend-color.medium {
    background: var(--warning-color);
}

.legend-color.low {
    background: var(--success-color);
}

/* Activity Heatmap */
.activity-heatmap {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    height: 200px;
    align-content: start;
}

.heatmap-day {
    aspect-ratio: 1;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    cursor: pointer;
}

.heatmap-day:hover {
    transform: scale(1.1);
}

.heatmap-day.active {
    background: var(--primary-color);
    color: white;
}

.heatmap-day.high {
    background: var(--danger-color);
    color: white;
}

.heatmap-day.medium {
    background: var(--warning-color);
    color: white;
}

.heatmap-day.low {
    background: var(--success-color);
    color: white;
}

/* Personal Records */
.pr-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.pr-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.pr-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.pr-exercise {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 4px;
}

.pr-details {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.pr-value {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
}

/* Recent Workouts */
.recent-workouts {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 25px;
}

.workouts-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.workout-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    cursor: pointer;
}

.workout-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.workout-info h4 {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 5px;
}

.workout-meta {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    display: flex;
    gap: 15px;
}

.workout-stats {
    text-align: right;
    color: var(--text-light);
}

.workout-stats .primary {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Workout Section */
.workout-section {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 30px;
}

.workout-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.workout-info h2 {
    color: var(--text-light);
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.workout-timer {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: 600;
}

.workout-actions {
    display: flex;
    gap: 15px;
}

/* Exercise List */
.exercise-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.exercise-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition);
}

.exercise-item.active {
    border: 2px solid var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.exercise-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.exercise-name {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
}

.exercise-muscle {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 12px;
}

.sets-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.set-row {
    display: grid;
    grid-template-columns: 60px 1fr 1fr 1fr auto;
    gap: 15px;
    align-items: center;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.set-number {
    color: var(--text-light);
    font-weight: 600;
    text-align: center;
}

.set-input {
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    text-align: center;
    font-size: 0.9rem;
}

.set-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.set-complete-btn {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.set-complete-btn.completed {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

/* Workout Summary */
.workout-summary {
    text-align: center;
    padding: 40px;
}

.summary-header h3 {
    color: var(--text-light);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.summary-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
}

.summary-stat {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

.summary-stat i {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.summary-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Routines Grid */
.routines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.routine-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 25px;
    transition: var(--transition);
    cursor: pointer;
}

.routine-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.routine-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.routine-title {
    color: var(--text-light);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.routine-category {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.routine-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 15px;
}

.routine-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.routine-exercises {
    color: var(--primary-color);
    font-weight: 600;
}

/* Exercise Grid */
.exercises-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.exercise-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-light);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}

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

.exercise-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.exercise-card-title {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
}

.exercise-difficulty {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
}

.exercise-card-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.exercise-card-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
    line-height: 1.4;
}

/* Exercise Search */
.exercise-search {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.exercise-search input,
.exercise-search select {
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 0.9rem;
}

.exercise-search input {
    flex: 1;
}

.exercise-search input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* Routine Filters */
.routine-filters {
    display: flex;
    gap: 15px;
    align-items: center;
}

.routine-filters select {
    padding: 10px 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-heavy);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 25px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h3 {
    color: var(--text-light);
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

.modal-body {
    padding: 25px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Form Styles */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

.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(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Workout Options */
.workout-options {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.option-group h4 {
    color: var(--text-light);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.routine-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.routine-option {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.routine-option:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.routine-option.selected {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.2);
}

.routine-option-name {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 5px;
}

.routine-option-meta {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.quick-start-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.quick-start-btn {
    flex-direction: column;
    gap: 10px;
    padding: 20px;
    text-align: center;
}

.quick-start-btn i {
    font-size: 1.5rem;
}

/* Routine Exercises */
.routine-exercises {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.routine-exercise-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.routine-exercise-info h5 {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 5px;
}

.routine-exercise-meta {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.remove-exercise-btn {
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Exercise Details */
.exercise-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.exercise-details-header {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.exercise-details-title {
    color: var(--text-light);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.exercise-details-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.exercise-details-description {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

.exercise-details-instructions {
    color: rgba(255, 255, 255, 0.8);
}

.exercise-details-instructions h4 {
    color: var(--text-light);
    margin-bottom: 10px;
}

.exercise-details-instructions ol {
    padding-left: 20px;
}

.exercise-details-instructions li {
    margin-bottom: 8px;
    line-height: 1.4;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .header-actions {
        justify-content: center;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .chart-card.main-chart {
        grid-column: 1;
        grid-row: 1;
    }
    
    .stats-cards {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .workout-header {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
    
    .workout-actions {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .dashboard-controls {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .routine-filters {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }
    
    .exercise-search {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .summary-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .summary-actions {
        flex-direction: column;
    }
    
    .routine-selector {
        grid-template-columns: 1fr;
    }
    
    .quick-start-options {
        grid-template-columns: 1fr;
    }
    
    .set-row {
        grid-template-columns: 1fr;
        gap: 10px;
        text-align: left;
    }
    
    .set-number {
        text-align: left;
        font-weight: bold;
    }
}

@media (max-width: 480px) {
    .header-content h1 {
        font-size: 1.5rem;
    }
    
    .modal-content {
        margin: 20px;
        width: calc(100% - 40px);
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .chart-container {
        height: 200px;
    }
    
    .chart-card.main-chart .chart-container {
        height: 250px;
    }
    
    .activity-heatmap {
        grid-template-columns: repeat(7, 1fr);
        gap: 4px;
    }
    
    .heatmap-day {
        font-size: 0.6rem;
    }
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.stat-card,
.chart-card,
.routine-card,
.exercise-card,
.workout-item {
    animation: slideIn 0.4s ease-out;
}

.workout-timer {
    animation: pulse 2s infinite;
}

/* Loading State */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .header-actions,
    .workout-actions,
    .btn,
    .chart-controls {
        display: none !important;
    }
    
    .chart-card,
    .stat-card,
    .routine-card {
        background: white;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}