:root {
    --accent: #D4AF37;
    --accent-light: #F5E6C8;
    --bg-dark: #1C1C1E;
    --bg-card: #2C2C2E;
    --bg-darker: #000000;
    --text-primary: #FFFFFF;
    --text-secondary: #8E8E93;
    --border: #3A3A3C;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Layout */
.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-darker);
    border-right: 1px solid var(--border);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.logo-accent {
    color: var(--accent);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
}

/* Search */
.search-box {
    position: relative;
    margin-bottom: 2rem;
}

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

.search-input:focus {
    border-color: var(--accent);
}

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

/* Date List */
.date-list {
    list-style: none;
}

.date-item {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 0.25rem;
}

.date-item:hover {
    background-color: var(--bg-card);
}

.date-item.active {
    background-color: var(--bg-card);
    border-left: 3px solid var(--accent);
}

.date-text {
    font-weight: 500;
}

.weekday-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

/* Stats */
.stats {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.stats-title {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--accent);
    font-weight: 600;
}

/* Main Content */
.main {
    flex: 1;
    margin-left: 280px;
    padding: 2rem 3rem;
}

.header {
    margin-bottom: 2rem;
}

.current-date {
    font-size: 1.8rem;
    font-weight: 600;
}

.current-weekday {
    color: var(--text-secondary);
    margin-left: 1rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    background-color: var(--bg-darker);
    padding: 4px;
    border-radius: 12px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    background: none;
}

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

.tab.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.tab-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background-color: var(--accent);
    color: #000;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-right: 0.5rem;
}

/* Content */
.content-panel {
    display: none;
}

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

.content-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem 2rem;
}

.content-card h1 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.content-card h2 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.content-card h3 {
    font-size: 1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.content-card p {
    margin-bottom: 0.75rem;
}

.content-card li {
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.content-card blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
}

.checkbox {
    margin-right: 0.5rem;
    cursor: pointer;
    user-select: none;
    display: inline-block;
    width: 1.2em;
    height: 1.2em;
    line-height: 1.2em;
    text-align: center;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.checkbox:hover {
    transform: scale(1.1);
    background-color: var(--border);
}

.checkbox.unchecked {
    color: var(--text-secondary);
}

.checkbox.checked {
    color: var(--accent);
}

.todo-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

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

.todo-item .checkbox {
    flex-shrink: 0;
}

.todo-item .todo-text {
    flex: 1;
}

.todo-item .todo-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.todo-item:hover .todo-actions {
    opacity: 1;
}

.todo-action-btn {
    padding: 0.25rem 0.5rem;
    background: var(--border);
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s;
}

.todo-action-btn:hover {
    background: var(--accent);
    color: #000;
}

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

.todo-item.completed .checkbox {
    color: var(--accent);
}

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

/* 完了セクションの区切り線 */
.completed-divider {
    border-top: 2px dashed var(--border);
    margin: 1rem 0 0.5rem 0;
    padding-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* Search Results */
.search-results {
    display: none;
}

.search-results.active {
    display: block;
}

.search-result {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

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

.search-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.search-result-date {
    color: var(--accent);
    font-weight: 600;
}

.search-result-category {
    background-color: var(--border);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.search-result-match {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.search-result-match mark {
    background-color: var(--accent);
    color: #000;
    padding: 0 0.25rem;
    border-radius: 2px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

/* Tags */
.tags-section {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.tags-title {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

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

.tag {
    padding: 0.3rem 0.6rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

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

.tag.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
}

.tag-count {
    margin-left: 0.3rem;
    opacity: 0.7;
}

/* Inline tag in content */
.inline-tag {
    color: var(--accent);
    background: rgba(212, 175, 55, 0.15);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
}

/* Search Filters */
.search-filters {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

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

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
}

/* Weekly Summary */
.weekly-summary {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-darker) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.weekly-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.weekly-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.weekly-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
}

.weekly-stat {
    text-align: center;
    padding: 1rem;
    background: var(--bg-darker);
    border-radius: 8px;
}

.weekly-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.weekly-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Progress Bar */
.progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* Weekly Details */
.weekly-details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.weekly-detail-section {
    margin-bottom: 1rem;
}

.weekly-detail-title {
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.weekly-detail-item {
    font-size: 0.85rem;
    padding: 0.3rem 0;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1rem;
    }
    
    .main {
        margin-left: 0;
        padding: 1rem;
    }
    
    .container {
        flex-direction: column;
    }
    
    .tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
    
    .weekly-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}