/* CSS Variables for Color Palette and Theme */
:root {
    /* Color Palette */
    --color-primary: #3C2415;
    --color-secondary: #6F4E37;
    --color-accent: #A67B5B;
    --color-light: #C4915C;
    --color-background: #E6D5AA;
    
    /* Light Theme */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-accent: var(--color-background);
    --text-primary: var(--color-primary);
    --text-secondary: var(--color-secondary);
    --text-muted: #6C757D;
    --border-color: #E9ECEF;
    --shadow-light: 0 2px 4px rgba(60, 36, 21, 0.1);
    --shadow-medium: 0 4px 12px rgba(60, 36, 21, 0.15);
    --shadow-heavy: 0 8px 24px rgba(60, 36, 21, 0.2);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --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;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-modal: 1050;
    --z-toast: 1100;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1A1A1A;
    --bg-secondary: #2D2D2D;
    --bg-accent: #3A3A3A;
    --text-primary: #FFFFFF;
    --text-secondary: var(--color-light);
    --text-muted: #AAAAAA;
    --border-color: #404040;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-heavy: 0 8px 24px rgba(0, 0, 0, 0.5);
}

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-medium);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: flex-start;
    align-items: center;
}
.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}
.app-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0;
}

.logo-img {
    width: 144px;
    height: 144px;
    object-fit: contain;
    flex-shrink: 0;
    display: block;
}

.title-text {
    white-space: nowrap;
}

.app-title .icon {
    width: 32px;
    height: 32px;
    stroke: white;
    flex-shrink: 0;
}


/* Navigation */
.navigation {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 999;
    width: 100%;
}

.desktop-nav {
    display: flex;
}

.mobile-nav {
    display: none;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-container::-webkit-scrollbar {
    display: none;
}

.nav-item {
    background: transparent;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 80px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.nav-item:hover {
    background: var(--bg-accent);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--color-accent);
    color: white;
}

.nav-icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    flex-shrink: 0;
}

.nav-text {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    width: 100%;
    padding-top: calc(64px + 60px + var(--spacing-xl));
    padding-bottom: calc(80px + var(--spacing-xl));
}

/* Loading State */
.loading-state {
    display: none;
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.loading-state.active {
    display: block;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Techniques Section */
.techniques-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.technique-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.technique-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.technique-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-light));
}

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

.technique-icon {
    width: 50px;
    height: 50px;
    padding: 12px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    stroke: white;
    flex-shrink: 0;
}

.card-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    flex: 1;
}

.level-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.level-badge.beginner {
    background: #E8F5E8;
    color: #2E7D32;
}

.level-badge.intermediate {
    background: #FFF3E0;
    color: #F57C00;
}

.level-badge.advanced {
    background: #FFEBEE;
    color: #C62828;
}

[data-theme="dark"] .level-badge.beginner {
    background: #1B5E20;
    color: #A5D6A7;
}

[data-theme="dark"] .level-badge.intermediate {
    background: #E65100;
    color: #FFCC02;
}

[data-theme="dark"] .level-badge.advanced {
    background: #B71C1C;
    color: #FFCDD2;
}

.card-content {
    margin-bottom: var(--spacing-lg);
}

.card-content p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.technique-steps {
    list-style: none;
    padding: 0;
}

.technique-steps li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.technique-steps li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

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

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-light));
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    min-height: 44px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
    animation: slideUp 0.3s ease;
}

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

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

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
}

.modal-close svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

.modal-close:hover {
    background: var(--bg-accent);
    color: var(--text-primary);
}

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

/* Progression Section */
.progression-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.progress-overview {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-medium);
    color: white;
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.stat-value {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress-bar-container {
    margin-top: var(--spacing-lg);
}

.progress-bar {
    width: 100%;
    height: 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-light), white);
    border-radius: var(--radius-md);
    transition: width var(--transition-slow);
    width: 0%;
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.3);
}

.progression-stages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.stage-item {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    position: relative;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-light);
}

.stage-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.stage-item.completed {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, var(--bg-accent), var(--bg-secondary));
}

.stage-item.current {
    border-color: var(--color-light);
    box-shadow: var(--shadow-medium);
    border-width: 3px;
}

.stage-item.current::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-light));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.stage-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.stage-number {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--color-light));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-light);
}

.stage-item.completed .stage-number {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
}

.stage-item.current .stage-number {
    background: linear-gradient(135deg, var(--color-light), var(--color-accent));
    animation: pulse 2s ease-in-out infinite;
}

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

.stage-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stage-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.stage-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.stage-description {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

.stage-status {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.stage-status.completed {
    background: #E8F5E8;
    color: #2E7D32;
}

.stage-status.current {
    background: #FFF3E0;
    color: #F57C00;
}

.stage-progress-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.progress-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-accent);
}

.stage-progress-section .progress-bar {
    width: 100%;
    height: 10px;
    background: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.stage-progress-section .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-light));
    border-radius: var(--radius-md);
    transition: width var(--transition-slow);
}

.stage-techniques {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.techniques-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.techniques-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.technique-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.technique-tag.completed {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

/* Training Log */
.training-log {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.training-log h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.log-form {
    margin-bottom: var(--spacing-2xl);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(166, 123, 91, 0.1);
}

.rating-input {
    display: flex;
    gap: var(--spacing-xs);
}

.rating-input input {
    display: none;
}

.rating-input label {
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0.3;
    display: inline-block;
    line-height: 1;
}

.rating-input input:checked ~ label,
.rating-input input:checked + label {
    opacity: 1;
}

.rating-input label:hover {
    opacity: 0.7;
    transform: scale(1.1);
}

.log-entries {
    max-height: 400px;
    overflow-y: auto;
}

.log-entry {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

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

.log-entry-date {
    font-weight: 600;
    color: var(--color-primary);
}

.log-entry-rating {
    font-size: var(--font-size-sm);
}

.log-entry-duration {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.log-entry-notes {
    color: var(--text-secondary);
}

/* Problems Section */
.problems-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.problem-search {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.problem-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 50px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.problem-search input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(166, 123, 91, 0.1);
}

.search-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
}

.search-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.search-btn:hover {
    color: var(--color-accent);
}

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

.problem-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.problem-card.expanded {
    transform: none;
    box-shadow: var(--shadow-heavy);
}

.problem-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.problem-icon {
    background: var(--color-accent);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 12px;
}

.problem-icon svg {
    width: 100%;
    height: 100%;
    stroke: white;
}

.problem-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    flex: 1;
}

.problem-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.problem-toggle:hover {
    background: var(--bg-accent);
}

.problem-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    transition: transform var(--transition-fast);
}

.problem-toggle:hover {
    color: var(--color-accent);
}

.problem-description {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.problem-solution {
    display: none;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.problem-card.expanded .problem-solution {
    display: block;
    animation: fadeIn 0.3s ease;
}

.solution-steps {
    list-style: none;
    padding: 0;
}

.solution-steps li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.solution-steps li::before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 0;
    top: var(--spacing-sm);
    background: var(--color-accent);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.solution-steps {
    counter-reset: step-counter;
}

/* Equipment Section */
.equipment-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.equipment-filters {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.filter-btn:hover {
    background: var(--bg-accent);
    border-color: var(--color-accent);
}

.filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.equipment-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

.equipment-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.equipment-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: var(--spacing-xl);
}

.equipment-image svg {
    width: 80px;
    height: 80px;
    stroke: white;
    stroke-width: 2;
}

.equipment-content {
    padding: var(--spacing-xl);
}

.equipment-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.equipment-category {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.equipment-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.equipment-features {
    list-style: none;
    padding: 0;
}

.equipment-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.equipment-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item:hover {
    box-shadow: var(--shadow-light);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-lg);
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-accent);
}

.faq-icon {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    transition: transform var(--transition-fast);
    stroke: currentColor;
    stroke-width: 2;
    flex-shrink: 0;
}

.faq-icon svg {
    width: 100%;
    height: 100%;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

.faq-search-container {
    margin-bottom: var(--spacing-xl);
}

.faq-search {
    position: relative;
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
}

.faq-search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 50px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.faq-search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(166, 123, 91, 0.1);
}

.faq-search-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
}

.faq-search-btn:hover {
    color: var(--color-accent);
}

.faq-search-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.faq-filters {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.faq-filter-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.faq-filter-btn:hover {
    background: var(--bg-accent);
    border-color: var(--color-accent);
}

.faq-filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.faq-empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    stroke: var(--text-muted);
    stroke-width: 2;
}

.faq-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.faq-tag {
    background: var(--bg-accent);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: var(--spacing-xs) 0;
    padding-bottom: calc(var(--spacing-xs) + env(safe-area-inset-bottom));
    margin-bottom: 80px; /* To avoid overlap with main content */
}

.bottom-nav-item {
    background: none;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    flex: 1;
    min-width: 0;
}

.bottom-nav-item:hover {
    background: var(--bg-accent);
    color: var(--text-primary);
}

.bottom-nav-item.active {
    color: var(--color-accent);
}

.bottom-nav-icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
    flex-shrink: 0;
}

.bottom-nav-text {
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    margin-bottom: 120px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.footer-content p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-heavy);
    min-width: 300px;
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideInRight 0.3s ease;
}

.toast.success {
    border-left: 4px solid #4CAF50;
}

.toast.error {
    border-left: 4px solid #F44336;
}

.toast.warning {
    border-left: 4px solid #FF9800;
}

.toast.info {
    border-left: 4px solid #2196F3;
}

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

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    stroke-width: 2;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    width: 24px;
    height: 24px;
}

.toast-close svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    stroke-width: 2;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-sm) 0;
    }
    
    .header-content {
        padding: 0 var(--spacing-sm);
    }
    
    .app-title {
        font-size: var(--font-size-xl);
        gap: var(--spacing-sm);
    }
    
    .logo-img {
        width: 108px;
        height: 108px;
    }
    
    .app-title .icon {
        width: 24px;
        height: 24px;
    }
    
    .desktop-nav {
        display: none;
    }
    
    .mobile-nav {
        display: flex;
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-sm);
        padding-top: calc(56px + var(--spacing-lg));
        padding-bottom: calc(80px + var(--spacing-lg));
    }
    
    .bottom-nav {
        padding-bottom: calc(var(--spacing-xs) + env(safe-area-inset-bottom, 0px));
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .techniques-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .progress-stats {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-md);
    }
    
    .progression-stages {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .stage-item {
        padding: var(--spacing-lg);
    }
    
    .stage-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .stage-number {
        width: 40px;
        height: 40px;
        min-width: 40px;
        font-size: var(--font-size-base);
    }
    
    .stat-value {
        font-size: var(--font-size-2xl);
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .equipment-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .equipment-filters {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }
    
    .filter-btn {
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
    }
    
    .toast {
        min-width: auto;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: var(--font-size-lg);
        gap: var(--spacing-xs);
    }
    
    .logo-img {
        width: 96px;
        height: 96px;
    }
    
    .title-text {
        font-size: var(--font-size-lg);
    }
    
    .nav-item {
        min-width: 70px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .nav-icon {
        width: 18px;
        height: 18px;
    }
    
    .bottom-nav-item {
        padding: var(--spacing-xs);
    }
    
    .bottom-nav-icon {
        width: 20px;
        height: 20px;
    }
    
    .bottom-nav-text {
        font-size: 10px;
    }
    
    .technique-card,
    .problem-card,
    .equipment-card {
        padding: var(--spacing-md);
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .modal-content {
        width: 95%;
        margin: var(--spacing-sm);
    }
    
    .modal-header,
    .modal-body {
        padding: var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .header,
    .navigation,
    .footer,
    .toast-container {
        display: none;
    }
    
    .main-content {
        padding: 0;
        max-width: none;
    }
    
    .content-section {
        display: block !important;
        page-break-after: always;
    }
    
    .technique-card,
    .problem-card,
    .equipment-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-light: none;
        --shadow-medium: none;
        --shadow-heavy: none;
    }
    
    .technique-card,
    .problem-card,
    .equipment-card {
        border: 2px solid var(--border-color);
    }
    
    .btn-primary {
        border: 2px solid var(--color-primary);
    }
}

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

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

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

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}