:root {
    /* Nord Theme Colors */
    --nord0: #2e3440; /* Polar Night */
    --nord1: #3b4252;
    --nord2: #434c5e;
    --nord3: #4c566a;
    --nord4: #d8dee9; /* Snow Storm */
    --nord5: #e5e9f0;
    --nord6: #eceff4;
    --nord7: #8fbcbb; /* Frost */
    --nord8: #88c0d0;
    --nord9: #81a1c1;
    --nord10: #5e81ac;
    --nord11: #bf616a; /* Aurora */
    --nord12: #d08770;
    --nord13: #ebcb8b;
    --nord14: #a3be8c;
    --nord15: #b48ead;
    
    /* Light theme using Nord colors */
    --bg-body: var(--nord6);
    --card-bg: #ffffff;
    --editor-bg: #ffffff;
    --text-primary: #2e3440;
    --text-secondary: #4c566a;
    --border-color: #d8dee9;
    --primary-color: var(--nord10);
    --primary-gradient: linear-gradient(135deg, var(--nord8) 0%, var(--nord9) 100%);
    --card-shadow: 0 2px 12px rgba(76, 86, 106, 0.1);
    --editor-shadow: 0 4px 16px rgba(76, 86, 106, 0.15);
    --border-radius: 1rem;
    --transition-speed: 0.3s;
}

[data-bs-theme="dark"] {
    --bg-body: var(--nord0);
    --card-bg: var(--nord1);
    --editor-bg: var(--nord2);
    --text-primary: #eceff4;
    --text-secondary: #d8dee9;
    --border-color: #4c566a;
    --primary-color: var(--nord8);
}

body {
    background-color: var(--bg-body);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    transition: background-color var(--transition-speed);
}

/* Header - Ultra compact */
.app-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.8rem 0; /* Even more compact */
    margin-bottom: 1.2rem;
    border-radius: 0 0 1rem 1rem;
    box-shadow: 0 2px 8px rgba(129, 161, 193, 0.2);
}

.app-header h1 {
    font-size: 1.6rem;
    margin-bottom: 0.3rem;
    font-weight: 600;
}

.app-header .lead {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-bottom: 0;
}

/* Header buttons with Nord colors */
#themeToggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    transition: all 0.2s ease;
}

#themeToggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

#shareBtn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    transition: all 0.2s ease;
}

#shareBtn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
}

/* Cards */
.filter-card, .editor-card, .stats-card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    background: var(--card-bg);
    transition: all var(--transition-speed);
}

.editor-card {
    box-shadow: var(--editor-shadow);
    min-height: 680px;
    display: flex;
    flex-direction: column;
}

.editor-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.editor-card .card-body .editor-container {
    flex: 1;
    min-height: 600px;
}

[data-bs-theme="dark"] .filter-card,
[data-bs-theme="dark"] .editor-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

/* Sticky Sidebar */
.sticky-sidebar {
    position: sticky;
    top: 1.2rem;
    z-index: 100;
}

/* Filters */
.filter-item {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.filter-item:last-child {
    border-bottom: none;
}

.filter-item:hover {
    background-color: rgba(129, 161, 193, 0.1);
    border-radius: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    margin: 0 -0.5rem;
}

.form-switch .form-check-input {
    width: 3em;
    height: 1.5em;
    cursor: pointer;
    background-color: var(--nord3);
}

[data-bs-theme="light"] .form-switch .form-check-input {
    background-color: #d8dee9;
}

[data-bs-theme="light"] .form-switch .form-check-input:focus {
    background-color: #c8d0dc;
    box-shadow: 0 0 0 0.25rem rgba(94, 129, 172, 0.25);
}

.form-switch .form-check-input:checked {
    background-color: var(--primary-color);
}

.form-check-label {
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding-left: 0.5rem;
    font-weight: 500;
}

/* Editor Container - Увеличенная высота */
.editor-container {
    height: 600px;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Textareas - Улучшенная видимость */
.editor-textarea {
    font-family: 'JetBrains Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    resize: none;
    width: 100%;
    height: 100%;
    transition: all 0.2s ease;
    padding: 1rem;
    background: var(--editor-bg);
    color: var(--text-primary);
}

.editor-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(129, 161, 193, 0.1);
    outline: none;
}

/* Улучшение видимости placeholder */
.editor-textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Улучшение видимости для темной темы */
[data-bs-theme="dark"] .editor-textarea {
    background: var(--editor-bg);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-bs-theme="dark"] .editor-textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Улучшение видимости для светлой темы */
[data-bs-theme="light"] .editor-textarea {
    background: #ffffff;
    color: #2e3440;
    border-color: #d8dee9;
}

[data-bs-theme="light"] .editor-textarea::placeholder {
    color: #4c566a;
    opacity: 0.6;
}

/* Улучшение видимости карточек */
[data-bs-theme="dark"] .card {
    background: var(--card-bg);
    color: var(--text-primary);
}

[data-bs-theme="light"] .card {
    background: #ffffff;
    color: #2e3440;
}

/* Улучшение видимости заголовков карточек */
.card-header h5, .card-header h6 {
    color: var(--text-primary) !important;
    min-height: 30px;
}

/* Улучшение видимости badge */
.badge {
    font-weight: 500;
}

[data-bs-theme="dark"] .badge.bg-light {
    background: var(--nord3) !important;
    color: var(--text-primary) !important;
}

/* Улучшение видимости form элементов */
.form-control, .form-select {
    background: var(--editor-bg);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.form-control:focus, .form-select:focus {
    background: var(--editor-bg);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background: var(--editor-bg);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-bs-theme="light"] .form-control,
[data-bs-theme="light"] .form-select {
    background: #ffffff;
    color: #2e3440;
    border-color: #d8dee9;
}

/* Улучшение видимости кнопок */
.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-primary);
}

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

[data-bs-theme="dark"] .btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-bs-theme="dark"] .btn-outline-secondary:hover {
    background: var(--nord3);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

[data-bs-theme="light"] .btn-outline-secondary {
    border-color: #d8dee9;
    color: #4c566a;
}

[data-bs-theme="light"] .btn-outline-secondary:hover {
    background: #f8f9fa;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Stats Card */
.stats-card {
    background: linear-gradient(135deg, var(--nord7) 0%, var(--nord8) 100%);
    color: white;
}

[data-bs-theme="light"] .stats-card {
    background: linear-gradient(135deg, var(--nord7) 0%, var(--nord8) 100%) !important;
    color: white !important;
}

.stats-card .text-muted {
    color: rgba(255,255,255,0.9) !important;
}

.stats-card strong {
    color: white !important;
    font-size: 1.1rem;
}

/* Drop Zone */
.drop-zone {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(129, 161, 193, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.drop-zone.active {
    display: flex;
}

.drop-zone-content {
    text-align: center;
    color: white;
    padding: 3rem;
    border: 3px dashed white;
    border-radius: 2rem;
    background: rgba(255,255,255,0.1);
}

.drop-zone-content i {
    font-size: 5rem;
    margin-bottom: 1rem;
}

/* Markdown Preview */
.markdown-preview {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 1rem;
    overflow-y: auto;
    background: var(--editor-bg);
    border-radius: 0.75rem;
    display: none;
    z-index: 10;
}

.markdown-preview.active {
    display: block;
}

.markdown-preview h1, .markdown-preview h2, .markdown-preview h3 {
    margin-top: 0;
    color: var(--text-primary);
}

.markdown-preview code {
    background: rgba(129, 161, 193, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    color: var(--nord11);
}

.markdown-preview pre {
    background: var(--bg-body);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
}

.markdown-preview blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    color: var(--text-secondary);
}

/* History & Presets */
.history-item, .preset-item {
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    background: var(--bg-body);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}

.history-item:hover, .preset-item:hover {
    background: rgba(129, 161, 193, 0.1);
    transform: translateX(3px);
}

.history-item .timestamp {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Toast Notifications */
.toast {
    border-radius: 0.75rem;
    border: none;
    box-shadow: 0 4px 12px rgba(76, 86, 106, 0.15);
    background: var(--card-bg);
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 991px) {
    .editor-container {
        height: 450px;
    }
    .sticky-sidebar {
        position: static;
        margin-bottom: 1.5rem;
    }
    .app-header {
        padding: 0.6rem 0;
        margin-bottom: 1rem;
        border-radius: 0 0 0.8rem 0.8rem;
    }
    
    .app-header h1 {
        font-size: 1.4rem;
    }
    
    .app-header .lead {
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    .editor-container {
        height: 350px;
    }
    .btn-action {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
    .app-header {
        padding: 0.5rem 0;
        margin-bottom: 0.8rem;
        border-radius: 0 0 0.6rem 0.6rem;
    }
    
    .app-header h1 {
        font-size: 1.3rem;
    }
    
    .app-header .lead {
        font-size: 0.8rem;
    }
    
    /* Stack header buttons on mobile */
    .app-header .col-md-4 {
        margin-top: 0.5rem;
        text-align: left;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-body);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--nord3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--nord2);
}

/* Dark mode scrollbar */
[data-bs-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--nord1);
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--nord4);
}