/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --accent-color: #FF8C00;
    --warning-color: #FFA500;
    --success-color: #FFD700;
    
    /* Neutral Colors */
    --background-color: #FFFFFF;
    --surface-color: #F8F9FA;
    --card-color: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #6C757D;
    --border-color: #E9ECEF;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Fluent Design Colors */
    --fluent-bg: rgba(255, 255, 255, 0.8);
    --fluent-border: rgba(139, 69, 19, 0.2);
    --fluent-hover: rgba(139, 69, 19, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --background-color: #1A1A1A;
    --surface-color: #2D2D2D;
    --card-color: #3A3A3A;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --border-color: #4A4A4A;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --fluent-bg: rgba(58, 58, 58, 0.8);
    --fluent-border: rgba(255, 140, 0, 0.2);
    --fluent-hover: rgba(255, 140, 0, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection color */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}

/* Better cursor for interactive elements */
button,
a,
input[type="checkbox"],
input[type="radio"],
select,
.nav-btn,
.tab-btn,
.btn-calendar {
    cursor: pointer;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: var(--fluent-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--fluent-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

.header-main {
    padding: var(--spacing-lg) 0 10px;
}

.header-main .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.header-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: var(--spacing-md);
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex: 1;
    gap: var(--spacing-sm);
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

.logo-img {
    max-height: 50px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: opacity var(--transition-fast);
}

.logo-img:hover {
    opacity: 0.8;
}

/* Fallback for text logo if image fails to load */
.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
    text-align: left;
    line-height: 1.2;
    flex: 1;
}

.header-controls {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
    flex-shrink: 0;
}

.btn-language,
.btn-theme {
    background: var(--fluent-bg);
    border: 1px solid var(--fluent-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    font-size: var(--font-size-xs);
    font-weight: 500;
    min-width: 40px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
}

.btn-language:hover,
.btn-theme:hover {
    background: var(--fluent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.btn-language:focus,
.btn-theme:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.nav-btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

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

.nav-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(139, 69, 19, 0.3);
}

.nav-btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.nav-btn,
a.nav-btn {
    text-decoration: none;
    display: inline-block;
}

a.nav-btn:visited {
    color: var(--primary-color);
}

a.nav-btn.active:visited {
    color: white;
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

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

.section.active {
    display: block;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-header h2 {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    font-weight: 600;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-info {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.btn-primary:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

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

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

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

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

.btn-secondary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

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

.btn-info:hover {
    background: var(--warning-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

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

.btn-info:focus {
    outline: 2px solid var(--warning-color);
    outline-offset: 2px;
}

/* Pet Selection */
.pet-selection {
    background: var(--card-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 8px var(--shadow-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    transition: all var(--transition-normal);
}

.pet-selection:hover {
    box-shadow: 0 4px 16px var(--shadow-color);
    transform: translateY(-2px);
}

.pet-selection label {
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 100px;
}

/* Form Elements */
.form-select,
.form-input,
.form-textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    background: var(--card-color);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    min-width: 200px;
    width: 100%;
}

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

.form-select:focus,
.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.15);
    outline: none;
}

.form-select:invalid:not(:placeholder-shown),
.form-input:invalid:not(:placeholder-shown),
.form-textarea:invalid:not(:placeholder-shown) {
    border-color: var(--warning-color);
}

.form-select:valid:not(:placeholder-shown),
.form-input:valid:not(:placeholder-shown),
.form-textarea:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

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

.form-group {
    position: relative;
}

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

.form-group label::after {
    content: '';
    display: inline-block;
    margin-left: 2px;
}

.form-group:has(input[required]) label::after,
.form-group:has(select[required]) label::after,
.form-group:has(textarea[required]) label::after {
    content: '*';
    color: var(--warning-color);
}

/* Calendar */
.calendar-container {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 8px var(--shadow-color);
}

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

.month-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
}

.btn-calendar {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-calendar:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

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

.btn-calendar:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.calendar-day {
    background: var(--card-color);
    padding: var(--spacing-md);
    min-height: 80px;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.calendar-day:hover {
    background: var(--fluent-hover);
    transform: scale(1.02);
    z-index: 1;
}

.calendar-day:active {
    transform: scale(0.98);
}

.calendar-day.other-month {
    color: var(--text-secondary);
    background: var(--surface-color);
}

.calendar-day.today {
    background: var(--accent-color);
    color: white;
}

.calendar-day.has-event {
    background: var(--success-color);
}

.calendar-day-number {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.calendar-event {
    background: var(--primary-color);
    color: white;
    padding: 2px 4px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    margin-bottom: 2px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Schedule List */
.schedule-list {
    display: grid;
    gap: var(--spacing-md);
}

.schedule-item {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-normal);
}

.schedule-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow-color);
    border-left-width: 6px;
}

.schedule-item {
    transition: all var(--transition-normal);
}

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

.schedule-item-title {
    font-weight: 600;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

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

.schedule-item-meta {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.schedule-item-description {
    color: var(--text-primary);
    line-height: 1.5;
}

/* Method Categories */
.method-categories {
    margin-bottom: var(--spacing-xl);
}

.category-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    background: var(--fluent-hover);
    transform: translateY(-1px);
}

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

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(139, 69, 19, 0.2);
}

.tab-btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.method-card {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.method-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-color);
    border-width: 2px;
}

.method-card {
    transition: all var(--transition-normal);
    border-width: 1px;
}

.method-card.natural {
    border-left: 4px solid var(--success-color);
}

.method-card.commercial {
    border-left: 4px solid var(--primary-color);
}

.method-card.environmental {
    border-left: 4px solid var(--accent-color);
}

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

.method-card-title {
    font-weight: 600;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.method-card-category {
    background: var(--surface-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    font-weight: 500;
}

.method-card-description {
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

.method-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Educational Mode */
.educational-mode {
    margin-top: var(--spacing-xl);
}

.educational-content {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
    display: none;
}

.educational-content.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

.educational-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.educational-content ul {
    list-style: none;
    padding: 0;
}

.educational-content li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: var(--spacing-lg);
}

.educational-content li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Checklist */
.checklist-form {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.checklist-items {
    margin: var(--spacing-lg) 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-sm);
    background: var(--surface-color);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.checklist-item:hover {
    background: var(--fluent-hover);
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.checklist-item:has(input:checked) {
    background: rgba(255, 215, 0, 0.1);
    border-color: var(--success-color);
}

.checklist-item input[type="checkbox"]:checked + label {
    text-decoration: line-through;
    opacity: 0.7;
}

.checklist-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.checklist-item label {
    flex: 1;
    margin: 0;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    flex-wrap: wrap;
}

.checklist-history {
    display: grid;
    gap: var(--spacing-md);
}

.checklist-history-item {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-normal);
}

.checklist-history-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow-color);
    border-left-width: 6px;
}

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

.checklist-history-title {
    font-weight: 600;
    color: var(--primary-color);
}

.checklist-history-date {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.checklist-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.checklist-result {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
}

.checklist-result.positive {
    background: rgba(255, 165, 0, 0.1);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

.checklist-result.negative {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

/* Monitoring Dashboard */
.monitoring-dashboard {
    display: grid;
    gap: var(--spacing-xl);
}

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

.stat-card {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-color);
    border-left: 4px solid var(--primary-color);
}

.stat-card {
    border-left: 4px solid transparent;
    transition: all var(--transition-normal);
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    font-weight: 500;
}

.stat-value {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-container {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.timeline-container h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--surface-color);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.timeline-item:hover {
    background: var(--card-color);
    transform: translateX(4px);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 20px;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 2px solid var(--card-color);
}

.timeline-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.timeline-item-title {
    font-weight: 600;
    color: var(--primary-color);
}

.timeline-item-date {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.timeline-item-description {
    color: var(--text-primary);
    line-height: 1.5;
}

/* Empty States */
.empty-message {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-md);
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    border: 2px dashed var(--border-color);
    margin: var(--spacing-lg) 0;
}

.empty-message::before {
    content: '📋';
    display: block;
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    opacity: 1;
    animation: fadeIn var(--transition-normal);
    padding: 120px var(--spacing-md) 120px;
    overflow-y: auto;
}

.modal-content {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: calc(100vh - 240px);
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: slideUp var(--transition-normal);
    margin-top: auto;
    margin-bottom: auto;
}

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

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

.modal-header h3 {
    color: var(--primary-color);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
}

.modal-close:hover {
    background: var(--surface-color);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-close:active {
    transform: rotate(90deg) scale(0.9);
}

.modal-close:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.modal-body {
    padding: var(--spacing-lg);
}

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

/* Dynamic modals (created via JavaScript) */
.method-details-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(5px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 120px var(--spacing-md) 120px;
    overflow-y: auto;
    opacity: 0;
    animation: fadeIn var(--transition-normal) forwards;
}

.method-details-content {
    background: var(--card-color);
    border-radius: var(--border-radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: calc(100vh - 240px);
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: slideUp var(--transition-normal);
    margin-top: auto;
    margin-bottom: auto;
}

.checklist-details-content {
    padding: var(--spacing-md) 0;
}

.method-details-header,
.method-details-body {
    padding: var(--spacing-lg);
}

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

.method-details-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
}

.method-details-close:hover {
    background: var(--surface-color);
    color: var(--text-primary);
    transform: rotate(90deg);
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.loading-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 0 10px rgba(139, 69, 19, 0.3);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay p {
    color: white;
    font-weight: 500;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
    width: calc(100% - 40px);
}

.toast {
    background: var(--card-color);
    border: none;
    border-radius: var(--border-radius-lg);
    padding: 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 300px;
    max-width: 100%;
    animation: slideInRight 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    display: flex;
    align-items: stretch;
    overflow: hidden;
    border-left: 4px solid transparent;
}

.toast.success {
    border-left-color: #22c55e;
    background: var(--card-color);
}

.toast.error {
    border-left-color: #ef4444;
    background: var(--card-color);
}

.toast.info {
    border-left-color: var(--accent-color);
    background: var(--card-color);
}

.toast-content {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toast-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    font-weight: bold;
    line-height: 1;
}

.toast.success .toast-icon {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.toast.success .toast-icon::before {
    content: '✓';
}

.toast.error .toast-icon {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.toast.error .toast-icon::before {
    content: '✕';
}

.toast.info .toast-icon {
    background: rgba(255, 140, 0, 0.15);
    color: var(--accent-color);
}

.toast.info .toast-icon::before {
    content: 'ℹ';
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    font-weight: 500;
}

.toast-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
    transition: all var(--transition-fast);
    line-height: 1;
    width: 36px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--surface-color);
    color: var(--text-primary);
    transform: scale(1.1);
}

.toast-close:active {
    transform: scale(0.9);
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: currentColor;
    width: 100%;
    transform-origin: left;
    animation: toastProgress 5s linear forwards;
}

.toast.success .toast-progress {
    background: #22c55e;
}

.toast.error .toast-progress {
    background: #ef4444;
}

.toast.info .toast-progress {
    background: var(--accent-color);
}

@keyframes slideInRight {
    from {
        transform: translateX(120%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(120%);
        opacity: 0;
    }
}

@keyframes toastProgress {
    from {
        transform: scaleX(1);
    }
    to {
        transform: scaleX(0);
    }
}

.toast.removing {
    animation: slideOutRight 0.3s ease-in forwards;
}

/* Footer */
.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: auto;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer-logo-link {
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    max-height: 30px;
    width: auto;
    height: auto;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.footer-logo:hover {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header-main {
        padding: var(--spacing-lg) 0 10px;
    }
    
    .header-main .container {
        padding: 0 var(--spacing-sm);
        gap: var(--spacing-xs);
    }
    
    .header-title-row {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .logo-link {
        flex: 1 1 100%;
        justify-content: center;
    }
    
    .logo-img {
        max-height: 40px;
    }
    
    .logo {
        font-size: var(--font-size-lg);
        text-align: center;
        flex: 1 1 100%;
    }
    
    .header-controls {
        gap: var(--spacing-xs);
        justify-content: center;
        flex: 1 1 100%;
    }
    
    .nav {
        flex-direction: row;
        gap: var(--spacing-xs);
        flex-wrap: wrap;
        width: 100%;
    }
    
    .nav-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
        flex: 1;
        min-width: 0;
        text-align: center;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .pet-selection {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .pet-selection label {
        min-width: auto;
    }
    
    .form-select,
    .form-input {
        min-width: 100%;
    }
    
    .calendar-grid {
        grid-template-columns: repeat(7, 1fr);
        gap: 1px;
    }
    
    .calendar-day {
        min-height: 60px;
        padding: var(--spacing-sm);
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal.active {
        padding: 80px var(--spacing-sm) 80px;
    }
    
    .modal-content {
        width: 95%;
        max-height: calc(100vh - 160px);
        margin: 0;
    }
    
    .method-details-modal {
        padding: 80px var(--spacing-sm) 80px;
    }
    
    .method-details-content {
        width: 95%;
        max-height: calc(100vh - 160px);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions button {
        width: 100%;
    }
    
    .toast-container {
        right: 10px;
        left: 10px;
        top: 10px;
        max-width: none;
        width: calc(100% - 20px);
    }
    
    .toast {
        min-width: auto;
        width: 100%;
    }
    
    .toast-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .toast-icon {
        width: 20px;
        height: 20px;
        font-size: 1.2rem;
    }
    
    .toast-message {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .header-main {
        padding: var(--spacing-lg) 0 10px;
    }
    
    .header-main .container {
        padding: 0 var(--spacing-xs);
        gap: var(--spacing-xs);
    }
    
    .header-title-row {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }
    
    .logo-link {
        flex: none;
        justify-content: center;
    }
    
    .logo-img {
        max-height: 35px;
    }
    
    .logo {
        font-size: var(--font-size-md);
        text-align: center;
        flex: none;
    }
    
    .header-controls {
        gap: 4px;
        justify-content: center;
        flex: none;
    }
    
    .btn-language,
    .btn-theme {
        padding: 3px var(--spacing-xs);
        font-size: var(--font-size-xs);
        min-width: 36px;
        height: 28px;
    }
    
    .nav {
        gap: 4px;
    }
    
    .nav-btn {
        padding: 4px var(--spacing-xs);
        font-size: var(--font-size-xs);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .calendar-day {
        min-height: 50px;
        padding: var(--spacing-xs);
    }
    
    .calendar-day-number {
        font-size: var(--font-size-xs);
    }
    
    .calendar-event {
        display: none;
    }
    
    .modal.active {
        padding: 0px var(--spacing-xs) 60px;
    }
    
    .modal-content {
        width: calc(100% - var(--spacing-xs) * 2);
        max-height: calc(100vh - 120px);
    }
    
    .method-details-modal {
        padding: 60px var(--spacing-xs) 60px;
    }
    
    .method-details-content {
        width: calc(100% - var(--spacing-xs) * 2);
        max-height: calc(100vh - 120px);
    }
}

/* Print Styles */
@media print {
    .header-controls,
    .nav,
    .modal,
    .loading-overlay,
    .toast-container {
        display: none !important;
    }
    
    .header {
        position: static;
        margin-top: 0;
    }
    
    .section {
        display: block !important;
        break-inside: avoid;
    }
    
    .method-card,
    .schedule-item,
    .checklist-history-item {
        break-inside: avoid;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-color: rgba(0, 0, 0, 0.3);
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-info {
        border: 2px solid currentColor;
    }
}

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

/* Focus Visible */
@supports selector(:focus-visible) {
    *:focus {
        outline: none;
    }
    
    *:focus-visible {
        outline: 2px solid var(--accent-color);
        outline-offset: 2px;
    }
}