:root {
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #252533;
    --bg-hover: #2f2f40;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --border: #2f2f40;
    --success: #10b981;
    --danger: #ef4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.braindump-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.sidebar {
    width: 400px;
    min-width: 300px;
    max-width: 500px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-container {
    width: 100%;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s;
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.tags-section {
    padding: 1rem 1.5rem 0.5rem;
    border-bottom: 1px solid var(--border);
}

.tags-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.4rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.tag-filter {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.clear-filter {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.2s;
}

.clear-filter:hover {
    background: rgba(255, 255, 255, 0.3);
}

.notes-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
}

.note-card {
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 0.5rem;
}

.note-card:hover {
    background: var(--bg-hover);
    transform: translateX(2px);
}

.note-card.selected {
    border-color: var(--accent);
    background: rgba(139, 92, 246, 0.1);
}

.note-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.note-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.pin-indicator {
    font-size: 0.9rem;
    margin-left: 0.5rem;
}

.note-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.note-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.note-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.note-tags {
    display: flex;
    gap: 0.25rem;
}

.mini-tag {
    padding: 0.2rem 0.5rem;
    background: var(--bg-hover);
    border-radius: 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.main-content {
    flex: 1;
    overflow-y: auto;
    background: var(--bg-primary);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 2rem;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.empty-state h2 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 400px;
}

.primary-button {
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow);
}

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

.note-editor {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
}

.editor-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.back-button {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.back-button:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

.editor-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-button {
    width: 36px;
    height: 36px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-button:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

.delete-button {
    width: 36px;
    height: 36px;
    background: var(--danger);
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.delete-button:hover {
    background: #dc2626;
}

.note-title-input {
    padding: 1.5rem;
    font-size: 2rem;
    font-weight: 700;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    border-bottom: 1px solid var(--border);
}

.note-title-input::placeholder {
    color: var(--text-muted);
}

.tags-input {
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    outline: none;
    border-bottom: 1px solid var(--border);
}

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

.note-content-input {
    flex: 1;
    padding: 1.5rem;
    font-size: 1.1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    resize: none;
    line-height: 1.8;
    font-family: 'Consolas', 'Monaco', monospace;
}

.note-content-input::placeholder {
    color: var(--text-muted);
}

.editor-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.save-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.save-button {
    padding: 0.5rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.save-button:hover {
    background: var(--accent-hover);
}

::-webkit-scrollbar {
    width: 8px;
}

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

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

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

.todos-section {
    padding: 1rem 1.5rem 0.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.todos-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.todos-title::before {
    content: "📋";
    font-size: 1.2rem;
}

.todo-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.todo-input {
    flex: 1;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
    transition: all 0.2s;
}

.todo-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

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

.todo-add-button {
    padding: 0.6rem 1rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.todo-add-button:hover {
    background: var(--accent-hover);
}

.todos-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.8rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.2s;
    cursor: pointer;
}

.todo-item:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.todo-item.completed {
    opacity: 0.6;
}

.todo-item.completed .todo-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent);
}

.todo-title {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.todo-title strong {
    font-weight: 700;
}

.todo-title em {
    font-style: italic;
}

.todo-title code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
}

.todo-title a {
    color: var(--accent);
    text-decoration: none;
}

.todo-title a:hover {
    text-decoration: underline;
}

.todo-delete-button {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
    font-size: 1rem;
}

.todo-delete-button:hover {
    background: var(--danger);
    color: white;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        max-width: none;
    }

    .main-content {
        display: none;
    }

    .main-content:has(.note-editor) {
        display: block;
    }

    .sidebar:has(.main-content .note-editor) {
        display: none;
    }
}