/* ====== CSS Variables ====== */
:root {
    /* Warm, supportive color palette */
    --primary: #F59E0B;
    --primary-dark: #D97706;
    --primary-light: #FCD34D;
    --primary-bg: #FFFBEB;
    
    --secondary: #6366F1;
    --secondary-light: #A5B4FC;
    
    --success: #10B981;
    --danger: #EF4444;
    
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    --bg-primary: #FEFCE8;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-hover: #FEF3C7;
    
    --border: #E5E7EB;
    --border-focus: #F59E0B;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    --font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Telegram theme integration */
    --tg-theme-bg-color: var(--bg-primary);
    --tg-theme-text-color: var(--text-primary);
}

/* Telegram dark theme support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a2e;
        --bg-secondary: #16213e;
        --bg-card: #1f2937;
        --bg-hover: #2d3748;
        --text-primary: #F9FAFB;
        --text-secondary: #D1D5DB;
        --text-muted: #9CA3AF;
        --border: #374151;
        --primary-bg: #292524;
    }
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Telegram WebApp specific */
body.tg-webapp {
    background: var(--tg-theme-bg-color, var(--bg-primary));
    color: var(--tg-theme-text-color, var(--text-primary));
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ====== Header ====== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 600px;
    margin: 0 auto;
}

.header-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
    text-align: center;
}

.back-btn,
.admin-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.back-btn:hover,
.admin-btn:hover {
    background: var(--bg-hover);
    color: var(--primary);
}

.hidden {
    display: none !important;
}

/* ====== Main Content ====== */
.main {
    flex: 1;
    padding: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

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

/* ====== Welcome Card ====== */
.welcome-card {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    color: #1F2937;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.welcome-emoji {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.welcome-card h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.welcome-card p {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ====== Search ====== */
.search-container {
    margin-bottom: var(--spacing-lg);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    position: absolute;
    right: var(--spacing-sm);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-hover);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.search-clear:hover {
    background: var(--border);
}

/* ====== Sections ====== */
.section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ====== Categories Grid ====== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.category-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

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

.category-card:active {
    transform: scale(0.98);
}

.category-card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.category-card-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.category-card-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ====== Articles List ====== */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.article-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.2s;
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
}

.article-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.article-card:active {
    transform: scale(0.99);
}

.article-card-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.article-card-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.article-card-category {
    background: var(--primary-bg);
    color: var(--primary-dark);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.article-card.featured {
    border-left-color: var(--secondary);
}

.article-card.featured .article-card-category {
    background: #EEF2FF;
    color: var(--secondary);
}

/* ====== Category Page ====== */
.category-header {
    text-align: center;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
}

.category-header .category-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.category-header h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.category-header p {
    color: var(--text-secondary);
}

/* ====== Search Results ====== */
.search-results-info {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

/* ====== Article Content ====== */
.article-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.article-content h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.3;
}

.article-content h2 {
    font-size: 1.25rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
    border-bottom: 2px solid var(--primary-light);
    padding-bottom: var(--spacing-sm);
}

.article-content h3 {
    font-size: 1.1rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

.article-content ul,
.article-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.article-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-content a {
    color: var(--primary);
    text-decoration: none;
}

.article-content a:hover {
    text-decoration: underline;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-content code {
    background: var(--bg-hover);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.article-meta-item {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-meta-category {
    background: var(--primary-bg);
    color: var(--primary-dark);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

/* ====== Loading ====== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

@media (prefers-color-scheme: dark) {
    .loading-overlay {
        background: rgba(0, 0, 0, 0.8);
    }
}

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

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ====== Admin Panel ====== */
.admin-panel h2 {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.admin-tab {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.admin-tab.active {
    background: var(--primary);
    color: white;
}

.admin-tab:hover:not(.active) {
    background: var(--bg-hover);
}

.admin-content {
    animation: fadeIn 0.3s ease;
}

.add-btn {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px dashed var(--border);
    background: transparent;
    color: var(--primary);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: var(--spacing-md);
}

.admin-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.add-btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--primary-light);
}

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

.add-btn:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.admin-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.admin-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.admin-item-info {
    flex: 1;
    min-width: 0;
}

.admin-item-title {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.admin-item-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.admin-btn-edit,
.admin-btn-delete {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.admin-btn-edit {
    background: var(--secondary-light);
    color: var(--secondary);
}

.admin-btn-edit:hover {
    background: var(--secondary);
    color: white;
}

.admin-btn-delete {
    background: #FEE2E2;
    color: var(--danger);
}

.admin-btn-delete:hover {
    background: var(--danger);
    color: white;
}

/* ====== Modal ====== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

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

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

/* ====== Form Styles ====== */
.form-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

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

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-checkbox input {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

.btn-secondary:hover {
    background: var(--text-muted);
    color: white;
}

/* ====== Suggest Topic ====== */
.suggest-topic-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md);
    border: 2px dashed var(--primary-light);
    border-radius: var(--radius-lg);
    background: var(--primary-bg);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-family);
    transition: background 0.2s, border-color 0.2s;
}

.suggest-topic-card:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
}

.suggest-topic-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.suggest-topic-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    color: var(--text-primary);
}

.suggest-topic-text small {
    color: var(--text-secondary);
    font-weight: 400;
}

.suggest-topic-intro {
    margin-bottom: var(--spacing-lg);
}

.suggest-topic-intro h2 {
    font-size: 1.35rem;
    margin-bottom: var(--spacing-sm);
}

.suggest-topic-form .btn-block {
    width: 100%;
    flex: none;
}

/* ====== Empty State ====== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.empty-state-text {
    font-size: 1rem;
}

/* ====== Responsive ====== */
@media (max-width: 480px) {
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .header-title {
        font-size: 1.1rem;
    }
    
    .welcome-card {
        padding: var(--spacing-md);
    }
    
    .welcome-card h2 {
        font-size: 1.25rem;
    }
}