/* 
 * Personal Pumping & Baby Tracker v2.1
 * Modern Design with Dark Mode Support
 * Accessible, Responsive, and Performance Optimized
 */

/* Import Google Fonts for Better Typography
   Note: Prefer using <link rel="preconnect"> and <link rel="stylesheet"> in HTML for performance. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Custom Properties for Theme System */
:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-elevated: #ffffff;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;

    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --border-focus: #3b82f6;

    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-active: #1d4ed8;

    --success: #10b981;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;

    --warning: #f59e0b;
    --warning-hover: #e08e05;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;

    --error: #ef4444;
    --error-bg: #fef2f2;
    --error-border: #fecaca;

    --info: #06b6d4;
    --info-bg: #f0f9ff;
    --info-border: #bae6fd;

    /* Shadows */
    --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 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

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

/* Dark Theme Colors */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-elevated: #1e293b;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-inverse: #0f172a;

    --border-primary: #334155;
    --border-secondary: #475569;
    --border-focus: #60a5fa;

    --accent-primary: #60a5fa;
    --accent-hover: #3b82f6;
    --accent-active: #2563eb;

    --success: #34d399;
    --success-bg: rgba(16, 185, 129, 0.1);
    --success-border: rgba(16, 185, 129, 0.3);

    --warning: #fbbf24;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --warning-border: rgba(245, 158, 11, 0.3);

    --error: #f87171;
    --error-bg: rgba(239, 68, 68, 0.1);
    --error-border: rgba(239, 68, 68, 0.3);

    --info: #22d3ee;
    --info-bg: rgba(6, 182, 212, 0.1);
    --info-border: rgba(6, 182, 212, 0.3);

    /* Adjust shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    color-scheme: light dark;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    padding: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
    background: var(--bg-elevated);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-icon {
    font-size: var(--font-size-lg);
    transition: transform var(--transition-fast);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(180deg);
}

/* Quick Actions */
.quick-actions {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-xl);
    gap: var(--space-md);
}

.quick-link-btn {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 50%, var(--info) 100%);
    border: none;
    border-radius: var(--radius-xl);
    padding: var(--space-lg) var(--space-2xl);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-inverse);
    text-decoration: none;
    min-height: 56px;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    background-clip: padding-box;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
}

.quick-link-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-slow);
}

.quick-link-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent-primary), var(--info), var(--success));
    border-radius: inherit;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: xor;
    -webkit-mask-composite: xor;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.quick-link-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-active) 50%, var(--success) 100%);
}

.quick-link-btn:hover::before {
    left: 100%;
}

.quick-link-btn:hover::after {
    opacity: 1;
}

.quick-link-btn:active {
    transform: translateY(-1px) scale(1.01);
    box-shadow: var(--shadow-lg);
}

.quick-link-btn:focus {
    outline: none;
    box-shadow: var(--shadow-xl), 0 0 0 4px rgba(59, 130, 246, 0.4);
}

.quick-link-icon {
    font-size: var(--font-size-2xl);
    transition: transform var(--transition-normal);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.quick-link-btn:hover .quick-link-icon {
    transform: scale(1.2) rotate(180deg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.quick-link-text {
    font-weight: 700;
    letter-spacing: 0.075em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Header */
header {
    background: var(--bg-elevated);
    padding: var(--space-2xl) var(--space-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--info), var(--success));
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% {
        opacity: 0.8;
    }
    50% {
        opacity: 1;
    }
}

header h1 {
    color: var(--text-primary);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    letter-spacing: -0.025em;
}

header p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.connection-status {
    font-size: var(--font-size-sm);
    cursor: help;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.connection-status:hover {
    transform: scale(1.1);
}

/* Main Content */
main {
    display: grid;
    gap: var(--space-xl);
}

section {
    background: var(--bg-elevated);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal), color var(--transition-normal);
}

section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

section h2 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: var(--space-sm);
    position: relative;
    letter-spacing: -0.025em;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
}

/* Enhanced Dashboard Styles */
.dashboard {
    background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-tertiary) 100%);
}

.dashboard h2 {
    margin-bottom: var(--space-xl);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.stats-section {
    margin-bottom: var(--space-2xl);
}

.stats-section h3 {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border-primary);
    padding-bottom: var(--space-sm);
}

/* Primary Stats Grid */
.primary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
}

.stat-card.primary {
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal), color var(--transition-normal);
}

.stat-card.primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--info));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.stat-card.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.stat-card.primary:hover::before {
    transform: scaleX(1);
}

.stat-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

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

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Secondary Stats Grid */
.secondary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
}

.stat-card:not(.primary) {
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal), color var(--transition-normal);
}

.stat-card:not(.primary):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-secondary);
}

.stat-card h4 {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.stat-card .stat-value {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--space-xs);
}

.stat-subtitle {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    font-style: italic;
}

/* Trends Grid */
.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
}

.trend-card {
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal);
}

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

.trend-card h4 {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-weight: 500;
}

.trend-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.trend-value {
    font-size: 1.5rem;
    font-weight: 600;
}

.trend-description {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-align: center;
}

/* Status Indicators */
.zero-value {
    opacity: 0.6;
    color: var(--text-tertiary) !important;
}

.recent {
    color: var(--success) !important;
}

.caution {
    color: var(--warning) !important;
}

.warning {
    color: var(--error) !important;
}

/* Trend Classes */
.trend-increasing {
    color: var(--success);
}

.trend-decreasing {
    color: var(--error);
}

.trend-stable {
    color: var(--info);
}

/* Provide a base stats grid (referenced in media queries) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
}

/* Responsive Dashboard */
@media (max-width: 768px) {
    .primary-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .secondary-stats,
    .trends-grid {
        grid-template-columns: 1fr;
    }

    .stat-card.primary {
        flex-direction: column;
        text-align: center;
        padding: var(--space-md);
    }

    .stat-content {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .primary-stats {
        grid-template-columns: 1fr;
    }

    .stats-section {
        margin-bottom: var(--space-xl);
    }
}

/* Form Styles */
.form-section {
    position: relative;
}

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

.form-group {
    margin-bottom: var(--space-lg);
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--border-secondary);
}

.form-group small {
    display: block;
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    font-weight: 400;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

/* Error States */
.error-message {
    color: var(--error);
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    display: none;
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    border-radius: var(--radius-sm);
}

.form-group.has-error input,
.form-group.has-error textarea {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group.has-error .error-message {
    display: block;
    animation: slideDown var(--transition-fast);
}

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

/* Checkbox Groups */
.checkbox-group {
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    background: var(--bg-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.checkbox-group:hover {
    border-color: var(--border-secondary);
}

.checkbox-group legend {
    font-weight: 500;
    color: var(--text-primary);
    padding: 0 var(--space-sm);
    font-size: var(--font-size-sm);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-sm);
    font-weight: 400;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.checkbox-group label:hover {
    background: var(--bg-tertiary);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: var(--space-sm);
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* Toggle Button Groups */
.toggle-group {
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    background: var(--bg-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.toggle-group:hover {
    border-color: var(--border-secondary);
}

.toggle-group legend {
    font-weight: 500;
    color: var(--text-primary);
    padding: 0 var(--space-sm);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-sm);
}

.toggle-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: space-between;
    width: 100%;
}

.toggle-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-width: 60px;
    min-height: 50px;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.toggle-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(59, 130, 246, 0.05) 50%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.toggle-btn:hover {
    border-color: var(--border-secondary);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.toggle-btn:hover::before {
    opacity: 1;
}

.toggle-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.toggle-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Active state for toggle buttons */
.toggle-btn.active {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 100%);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.toggle-btn.active::before {
    opacity: 0;
}

.toggle-btn.active:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-active) 100%);
    box-shadow: var(--shadow-lg);
}

/* Special styling for pumping toggles */
.toggle-btn:not(.diaper-toggle) {
    border-color: var(--info-border);
}

.toggle-btn:not(.diaper-toggle).active {
    border-color: var(--info);
    background: linear-gradient(135deg, var(--info) 0%, var(--accent-primary) 100%);
}

.toggle-btn:not(.diaper-toggle).active:hover {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--info) 100%);
}

/* Special styling for diaper toggles */
.toggle-btn.diaper-toggle {
    border-color: var(--success-border);
}

.toggle-btn.diaper-toggle.active {
    border-color: var(--success);
    background: linear-gradient(135deg, var(--success) 0%, var(--success-bg) 100%);
    color: var(--text-primary);
}

.toggle-btn.diaper-toggle.active:hover {
    background: linear-gradient(135deg, var(--success-bg) 0%, var(--success) 100%);
}

/* Toggle button icons and labels */
.toggle-icon {
    font-size: 1.25rem;
    margin-bottom: 2px;
    transition: transform var(--transition-fast);
}

.toggle-btn:hover .toggle-icon {
    transform: scale(1.1);
}

.toggle-btn.active .toggle-icon {
    transform: scale(1.15);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.toggle-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.025em;
    line-height: 1.2;
}

/* Accessibility - Focus visible */
.toggle-btn:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Touch device optimization */
@media (hover: none) {
    .toggle-btn:hover {
        transform: none;
        box-shadow: var(--shadow-sm);
    }

    .toggle-btn:active {
        transform: scale(0.95);
    }

    .toggle-btn.active:active {
        transform: scale(0.98);
    }
}

/* Responsive design for toggle buttons */
@media (max-width: 768px) {
    .toggle-group {
        padding: var(--space-sm);
    }

    .toggle-buttons {
        gap: var(--space-xs);
    }

    .toggle-btn {
        min-width: 55px;
        min-height: 48px;
        padding: var(--space-xs) var(--space-sm);
    }

    .toggle-icon {
        font-size: 1.125rem;
        margin-bottom: 1px;
    }

    .toggle-label {
        font-size: 10px;
        font-weight: 500;
    }
}

@media (max-width: 480px) {
    .toggle-group {
        padding: var(--space-sm);
        margin-bottom: var(--space-md);
    }

    .toggle-group legend {
        font-size: 11px;
        margin-bottom: var(--space-xs);
    }

    .toggle-buttons {
        gap: var(--space-xs);
    }

    .toggle-btn {
        min-width: 50px;
        min-height: 45px;
        padding: var(--space-xs) var(--space-sm);
        border-radius: var(--radius-sm);
    }

    .toggle-icon {
        font-size: 1rem;
        margin-bottom: 1px;
    }

    .toggle-label {
        font-size: 9px;
        line-height: 1.1;
    }
}

/* Submit Button */
.submit-btn {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 100%);
    color: var(--text-inverse);
    border: none;
    padding: var(--space-lg) var(--space-2xl);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-active) 100%);
}

.submit-btn:hover::before {
    left: 100%;
}

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

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Events List */
.events-section {
    max-height: 80vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-secondary) var(--bg-tertiary);
}

.events-section::-webkit-scrollbar {
    width: 8px;
}

.events-section::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.events-section::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.events-section::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

.events-list {
    display: grid;
    gap: var(--space-md);
}

.event-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.event-item:nth-child(odd) {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
}

.event-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.event-item:hover {
    border-color: var(--border-secondary);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.event-item:hover::before {
    opacity: 1;
}

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

.event-time {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.event-duration {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    background: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.event-icons {
    display: flex;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
}

.event-details {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.event-notes {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-style: italic;
    color: var(--text-secondary);
    border-left: 3px solid var(--accent-primary);
    margin-top: var(--space-md);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.empty-state.error {
    color: var(--error);
}

.empty-state .emoji {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--space-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.empty-state p {
    font-size: var(--font-size-lg);
    margin: var(--space-md) 0;
    font-weight: 500;
}

.empty-state small {
    display: block;
    margin-top: var(--space-sm);
    opacity: 0.8;
    font-size: var(--font-size-sm);
}

.retry-btn {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}

.retry-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transform: translateX(calc(100% + var(--space-lg)));
    transition: transform var(--transition-normal);
    z-index: 1000;
    max-width: 400px;
    font-weight: 500;
    border: 1px solid var(--border-primary);
    backdrop-filter: blur(10px);
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success-border);
}

.toast-error {
    background: var(--error-bg);
    color: var(--error);
    border-color: var(--error-border);
}

.toast-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: var(--warning-border);
}

.toast-info {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info-border);
}

/* Backdrop-filter fallback */
@supports not (backdrop-filter: blur(10px)) {
    .toast {
        backdrop-filter: none;
    }

    .modal-overlay {
        backdrop-filter: none;
    }
}

/* Utility Classes */
.loading {
    color: var(--text-tertiary);
    font-style: italic;
    animation: pulse 2s ease-in-out infinite;
}

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

.error {
    color: var(--error);
    font-weight: 600;
}

.success {
    color: var(--success);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: var(--space-md);
    }

    .theme-toggle {
        top: var(--space-md);
        right: var(--space-md);
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-xs);
    }

    header {
        padding: var(--space-xl) var(--space-lg);
        margin-bottom: var(--space-lg);
    }

    header h1 {
        font-size: var(--font-size-2xl);
        flex-direction: column;
        gap: var(--space-sm);
    }

    section {
        padding: var(--space-lg);
        margin-bottom: var(--space-lg);
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        margin-bottom: var(--space-md);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .stat-card {
        padding: var(--space-lg);
    }

    .stat-card h3 {
        font-size: var(--font-size-xs);
    }

    .stat-card span {
        font-size: var(--font-size-xl);
    }

    .event-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .event-icons {
        align-self: flex-end;
    }

    .checkbox-group {
        padding: var(--space-md);
    }

    .toast {
        right: var(--space-md);
        top: var(--space-md);
        max-width: calc(100vw - var(--space-xl));
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-group input,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .submit-btn {
        padding: var(--space-lg) var(--space-xl);
        font-size: var(--font-size-lg);
    }

    header h1 {
        font-size: var(--font-size-xl);
    }

    .theme-toggle {
        position: relative;
        top: auto;
        right: auto;
        margin: 0 auto var(--space-lg);
        display: inline-flex;
    }
}

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

/* Focus Visible for Better Accessibility */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
    :root {
        --border-primary: #000000;
        --border-secondary: #000000;
        --text-secondary: var(--text-primary);
    }

    [data-theme="dark"] {
        --border-primary: #ffffff;
        --border-secondary: #ffffff;
        --text-secondary: var(--text-primary);
    }
}

/* Print Styles */
@media print {
    .theme-toggle,
    .toast {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    section {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* CRUD Functionality Styles */

/* Action Buttons for Event Items */
.event-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-primary);
}

.action-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-secondary);
    border-radius: 6px;
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
}

.action-btn:active {
    transform: translateY(0);
}

.action-btn.edit-btn {
    color: var(--info);
    border-color: var(--info-border);
}

.action-btn.edit-btn:hover {
    background: var(--info-bg);
    color: var(--info);
}

.action-btn.delete-btn {
    color: var(--error);
    border-color: var(--error-border);
}

.action-btn.delete-btn:hover {
    background: var(--error-bg);
    color: var(--error);
}

/* Edit Mode Styling */
.submit-btn.edit-mode {
    background: var(--warning);
    border-color: var(--warning);
}

.submit-btn.edit-mode:hover {
    background: var(--warning-hover, #e08e05);
}

.cancel-edit-btn {
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-secondary);
    border-radius: 8px;
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    margin-left: 0.75rem;
}

.cancel-edit-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-secondary);
}

/* Modal Dialog Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.modal-overlay.show {
    opacity: 1;
}

.modal-content {
    background: var(--bg-elevated);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-primary);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(-20px);
    transition: transform 0.2s ease-in-out;
}

.modal-overlay.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.5rem 1.5rem 0;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: 1rem;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 0 1.5rem 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-body p {
    margin: 0 0 1rem;
}

.modal-body ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1rem 1rem 1rem 2.5rem;
    border-left: 4px solid var(--warning);
}

.modal-body li {
    margin-bottom: 0.5rem;
}

.modal-body small {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.modal-actions {
    padding: 1rem 1.5rem 1.5rem;
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    border-top: 1px solid var(--border-primary);
    margin-top: 1rem;
}

.modal-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    min-width: 100px;
}

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

.modal-btn.cancel-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-secondary);
}

.modal-btn.confirm-btn {
    background: var(--accent-primary);
    color: var(--text-inverse);
}

.modal-btn.confirm-btn:hover {
    background: var(--accent-hover);
}

.modal-btn:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* Special styling for duplicate confirmation dialog */
.modal-content.duplicate-warning .modal-header {
    border-bottom-color: var(--warning-border);
}

.modal-content.duplicate-warning .modal-header h3 {
    color: var(--warning);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-content.duplicate-warning .modal-header h3::before {
    content: "⚠️";
    font-size: 1.2em;
}

/* ============================================
   Advanced Statistics Page Styles
   ============================================ */

/* Header Navigation */
.header-nav {
    margin-block-start: var(--space-md);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--border-primary);
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
    transform: translateX(-2px);
}

/* Stats Filters Section */
.stats-filters {
    background: var(--bg-elevated);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    display: grid;
    gap: var(--space-lg);
}

/* Filters layout */
.filters-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.filter-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.filter-group select,
.filter-group input[type="date"],
.filter-group input[type="text"] {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.filter-group select:focus,
.filter-group input[type="date"]:focus,
.filter-group input[type="text"]:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

/* Metrics chips/toggles */
.metrics-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.metric-chip {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.metric-chip:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
}

.metric-chip.active {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
}

@media (max-width: 768px) {
    .filters-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* Reduce hover effects on touch devices */
@media (hover: none) {
    .quick-link-btn:hover,
    .stat-card:hover,
    .trend-card:hover,
    .event-item:hover,
    .action-btn:hover,
    .nav-link:hover,
    .metric-chip:hover {
        transform: none;
        box-shadow: none;
    }
}