/* ============================================
   CSS Custom Properties (Theme Variables)
   ============================================ */
:root {
    /* Light Theme Colors */
    --color-primary: #4F46E5;
    --color-primary-hover: #4338CA;
    --color-primary-light: #EEF2FF;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;

    /* Background Colors */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F9FAFB;
    --color-bg-tertiary: #F3F4F6;
    --color-bg-elevated: #FFFFFF;

    /* Text Colors */
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --color-text-tertiary: #9CA3AF;
    --color-text-inverse: #FFFFFF;

    /* Border Colors */
    --color-border: #E5E7EB;
    --color-border-focus: var(--color-primary);

    /* Shadow */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Z-Index */
    --z-dropdown: 100;
    --z-modal: 1000;
    --z-toast: 2000;
    --z-pedometer: 1500;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg-primary: #111827;
    --color-bg-secondary: #1F2937;
    --color-bg-tertiary: #374151;
    --color-bg-elevated: #1F2937;

    --color-text-primary: #F9FAFB;
    --color-text-secondary: #D1D5DB;
    --color-text-tertiary: #9CA3AF;

    --color-border: #374151;
    --color-primary-light: #1E1B4B;
}

/* ============================================
   Base Styles & Reset
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; margin-bottom: var(--spacing-md); }
h3 { font-size: 1.25rem; margin-bottom: var(--spacing-sm); }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* ============================================
   Layout
   ============================================ */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-logo {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.header-content h1 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin: 0;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Main Navigation */
.main-nav {
    position: sticky;
    top: 57px;
    z-index: 40;
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    background-color: transparent;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-btn svg {
    width: 24px;
    height: 24px;
}

.nav-btn:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-tertiary);
}

.nav-btn.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    padding-bottom: 100px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-normal);
}

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

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(100%);
    }
}

/* ============================================
   Buttons
   ============================================ */
button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    cursor: pointer;
    outline: none;
}

.icon-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

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

.icon-btn svg {
    width: 20px;
    height: 20px;
}

.sun-icon { display: block; }
.moon-icon { display: none; }

[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

.step-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    font-size: 0.65rem;
    font-weight: var(--font-weight-bold);
    line-height: 18px;
    text-align: center;
    color: var(--color-text-inverse);
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

.submit-btn,
.primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.submit-btn:hover,
.primary-btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.submit-btn:active,
.primary-btn:active {
    transform: translateY(0);
}

.submit-btn svg,
.primary-btn svg {
    width: 18px;
    height: 18px;
}

.secondary-btn,
.text-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.text-btn {
    background-color: transparent;
    color: var(--color-text-secondary);
}

.text-btn:hover {
    color: var(--color-text-primary);
}

.close-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background-color: var(--color-border);
    color: var(--color-text-primary);
}

.close-btn svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Dashboard
   ============================================ */
.dashboard-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon.workout {
    background-color: #DBEAFE;
    color: #3B82F6;
}

.stat-icon.duration {
    background-color: #FEE2E2;
    color: #EF4444;
}

.stat-icon.calories {
    background-color: #FEF3C7;
    color: #F59E0B;
}

[data-theme="dark"] .stat-icon.workout {
    background-color: #1E3A5F;
}

[data-theme="dark"] .stat-icon.duration {
    background-color: #5C2D2D;
}

[data-theme="dark"] .stat-icon.calories {
    background-color: #5C4A1F;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Charts */
.chart-section {
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.chart-section h2 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

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

.chart-container.small {
    height: 200px;
}

/* ============================================
   Workout List & Cards
   ============================================ */
.workout-list {
    display: grid;
    gap: var(--spacing-md);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: var(--spacing-xs);
}

.empty-state .hint {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.workout-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.workout-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.workout-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.workout-icon svg {
    width: 24px;
    height: 24px;
}

.workout-icon.running,
.workout-icon.cycling {
    background-color: #DBEAFE;
    color: #3B82F6;
}

.workout-icon.weightlifting {
    background-color: #FEE2E2;
    color: #EF4444;
}

.workout-icon.swimming {
    background-color: #E0E7FF;
    color: #6366F1;
}

.workout-icon.yoga {
    background-color: #D1FAE5;
    color: #10B981;
}

.workout-icon.other {
    background-color: #F3F4F6;
    color: #6B7280;
}

[data-theme="dark"] .workout-icon.running,
[data-theme="dark"] .workout-icon.cycling {
    background-color: #1E3A5F;
}

[data-theme="dark"] .workout-icon.weightlifting {
    background-color: #5C2D2D;
}

[data-theme="dark"] .workout-icon.swimming {
    background-color: #2D2F5C;
}

[data-theme="dark"] .workout-icon.yoga {
    background-color: #1F4D3A;
}

[data-theme="dark"] .workout-icon.other {
    background-color: #374151;
}

.workout-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.workout-title {
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    color: var(--color-text-primary);
}

.workout-date {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.workout-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.workout-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

.workout-stat svg {
    width: 12px;
    height: 12px;
}

.workout-actions {
    display: flex;
    gap: var(--spacing-xs);
    align-items: flex-start;
}

.action-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--color-text-tertiary);
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.action-btn svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Forms
   ============================================ */
.workout-form,
.goal-form,
.weight-form {
    display: grid;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text-primary);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-tertiary);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    padding-right: var(--spacing-xl);
}

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

.dynamic-fields {
    display: grid;
    gap: var(--spacing-md);
}

/* ============================================
   Section Headers & Filters
   ============================================ */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.filter-controls {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-select,
.filter-input {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

/* ============================================
   Goals
   ============================================ */
.goals-list {
    display: grid;
    gap: var(--spacing-md);
}

.goal-card {
    padding: var(--spacing-lg);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.goal-title {
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
}

.goal-period {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
}

.goal-status {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
}

.goal-status.active {
    color: var(--color-success);
    background-color: #D1FAE5;
}

.goal-status.completed {
    color: var(--color-info);
    background-color: #DBEAFE;
}

.goal-status.expired {
    color: var(--color-danger);
    background-color: #FEE2E2;
}

[data-theme="dark"] .goal-status.active {
    background-color: #1F4D3A;
}

[data-theme="dark"] .goal-status.completed {
    background-color: #1E3A5F;
}

[data-theme="dark"] .goal-status.expired {
    background-color: #5C2D2D;
}

.progress-container {
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    height: 8px;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-info));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-fill.completed {
    background: linear-gradient(90deg, var(--color-success), #34D399);
}

.progress-text {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.goal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* ============================================
   Weight Tracking
   ============================================ */
.weight-history {
    margin-top: var(--spacing-lg);
}

.weight-list {
    display: grid;
    gap: var(--spacing-sm);
}

.weight-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-md);
}

.weight-value {
    font-weight: var(--font-weight-semibold);
    font-size: 1.125rem;
    color: var(--color-text-primary);
}

.weight-date {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.weight-change {
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
}

.weight-change.positive {
    color: var(--color-success);
}

.weight-change.negative {
    color: var(--color-danger);
}

/* ============================================
   Modals
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn var(--transition-fast);
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h3 {
    margin: 0;
    font-size: 1.125rem;
}

.modal-content > form {
    padding: var(--spacing-lg);
}

/* Share Modal */
.share-modal .modal-content {
    max-width: 400px;
}

.share-card {
    margin: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    color: white;
    box-shadow: var(--shadow-lg);
}

.share-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.share-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.share-icon svg {
    width: 20px;
    height: 20px;
}

.share-app-name {
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
}

.share-workout-info {
    margin-bottom: var(--spacing-lg);
}

.share-workout-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.share-workout-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.share-stat {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.share-stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

.share-stat-value {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.share-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
    opacity: 0.8;
}

.share-motto {
    font-style: italic;
}

.share-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.share-actions button {
    font-size: 0.875rem;
}

/* ============================================
   Pedometer Panel
   ============================================ */
.pedometer-panel {
    position: fixed;
    top: 0;
    right: -100%;
    z-index: var(--z-pedometer);
    width: 320px;
    max-width: 100vw;
    height: 100vh;
    background-color: var(--color-bg-primary);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-normal);
    overflow-y: auto;
}

.pedometer-panel.active {
    right: 0;
}

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

.pedometer-header h3 {
    margin: 0;
}

.pedometer-content {
    padding: var(--spacing-lg);
}

.pedometer-status {
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.status-text {
    color: var(--color-text-secondary);
}

.pedometer-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.pedo-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.pedo-value {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.pedo-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

.full-width {
    width: 100%;
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    animation: slideUp var(--transition-fast);
}

.toast svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.toast.success svg { color: var(--color-success); }
.toast.error svg { color: var(--color-danger); }
.toast.warning svg { color: var(--color-warning); }
.toast.info svg { color: var(--color-info); }

.toast-message {
    font-size: 0.875rem;
    color: var(--color-text-primary);
}

/* ============================================
   Install Prompt
   ============================================ */
.install-prompt {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-modal);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-normal);
}

.prompt-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.prompt-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.prompt-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.prompt-text {
    flex: 1;
}

.prompt-text strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.prompt-text p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.prompt-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-controls {
        width: 100%;
    }

    .filter-select,
    .filter-input {
        flex: 1;
    }

    .workout-card {
        grid-template-columns: auto 1fr;
    }

    .workout-actions {
        grid-column: 2;
        justify-content: flex-end;
    }

    .modal-content {
        max-height: 95vh;
    }

    .share-card {
        margin: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .header-content h1 {
        font-size: 1rem;
    }

    .nav-btn span {
        font-size: 0.6875rem;
    }

    .stat-card {
        padding: var(--spacing-md);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .main-nav {
        padding: var(--spacing-xs);
    }

    .nav-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .app-header,
    .main-nav,
    .workout-actions,
    .modal,
    .toast-container,
    .install-prompt,
    .pedometer-panel {
        display: none !important;
    }

    .main-content {
        padding: 0;
    }

    body {
        background-color: white;
        color: black;
    }

    .share-card {
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }
}

/* ============================================
   Accessibility
   ============================================ */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-primary: #000000;
    }

    [data-theme="dark"] {
        --color-border: #FFFFFF;
        --color-text-primary: #FFFFFF;
    }
}