:root {
    /* Light Mode Variables */
    --bg-color: #f4f6f9;
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9;
    --surface-elevated: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;

    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-soft: rgba(37, 99, 235, 0.1);
    --secondary-color: #f1f5f9;
    --secondary-hover: #e2e8f0;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --danger-soft: rgba(239, 68, 68, 0.12);
    --warning-color: #f59e0b;
    --warning-soft: rgba(245, 158, 11, 0.14);
    --success-color: #10b981;
    --success-soft: rgba(16, 185, 129, 0.12);

    /* Status Colors */
    --status-1: #94a3b8; /* 企画中 */
    --status-2: #64748b; /* 撮影待ち */
    --status-3: #f59e0b; /* 編集中 */
    --status-4: #3b82f6; /* 編集完了 */
    --status-5: #8b5cf6; /* 確認待ち */
    --status-6: #06b6d4; /* 投稿予約済み */
    --status-7: #10b981; /* 投稿完了 */

    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.14);

    --border-radius: 10px;
    --border-radius-sm: 6px;
    --font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
}

body.dark-theme {
    /* Dark Mode Variables */
    --bg-color: #0b0f17;
    --surface-color: #151c28;
    --surface-hover: #1e293b;
    --surface-elevated: #1a2332;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #263346;

    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-soft: rgba(59, 130, 246, 0.16);
    --secondary-color: #1e293b;
    --secondary-hover: #334155;
    --danger-color: #f87171;
    --danger-hover: #ef4444;
    --danger-soft: rgba(248, 113, 113, 0.16);
    --warning-color: #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.16);
    --success-color: #34d399;
    --success-soft: rgba(52, 211, 153, 0.16);

    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.7);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    transition: background-color 0.2s, color 0.2s;
    -webkit-font-smoothing: antialiased;
}

/* Typography & Utility */
h1, h2, h3, h4 { font-weight: 600; color: var(--text-primary); }
.hidden { display: none !important; }
.text-left { text-align: left; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.mobile-only, .mobile-filter-toggle { display: none !important; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    font-size: 13.5px;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.18s ease;
    font-family: inherit;
    white-space: nowrap;
    text-decoration: none;
}
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.btn-sm {
    padding: 0.38rem 0.75rem;
    font-size: 12.5px;
}
.btn-icon {
    padding: 0.45rem 0.65rem;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 16px;
}
.btn-icon:hover {
    background-color: var(--secondary-hover);
}
.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}
.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    border-color: var(--border-color);
}
.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-hover);
}
.btn-danger {
    background-color: var(--danger-color);
    color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
}
.btn-block { width: 100%; }
.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
}
.btn-link:hover { text-decoration: underline; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.form-row .form-group {
    flex: 1;
    min-width: 220px;
}
.flex-2 { flex: 2 !important; }
label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 12.5px;
}
input[type="text"], input[type="password"], input[type="number"],
input[type="url"], input[type="datetime-local"], select, textarea {
    width: 100%;
    padding: 0.58rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--surface-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13.5px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-soft);
}
textarea { resize: vertical; }
.checkbox-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.45rem 0.6rem;
    background-color: var(--surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    min-height: 40px;
    align-items: center;
}
.checkbox-group label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
}
.url-input-group {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}
.url-input-group input { flex: 1; }

/* View Container */
.view-container {
    min-height: 100vh;
    display: flex;
}

/* Login View */
#login-view {
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top, var(--surface-hover), var(--bg-color));
    padding: 1rem;
}
.login-card {
    background-color: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    text-align: center;
    border: 1px solid var(--border-color);
}
.login-logo { font-size: 40px; margin-bottom: 0.5rem; }
.login-card h1 { margin-bottom: 0.25rem; letter-spacing: 1.5px; font-size: 24px; }
.login-card p { color: var(--text-secondary); margin-bottom: 1.75rem; font-size: 13px; }
.error-msg { color: var(--danger-color); margin-top: 1rem; font-size: 13px; font-weight: 500; }

/* Sidebar */
.sidebar {
    width: 240px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.25rem 0;
    flex-shrink: 0;
}
.brand {
    padding: 0 1.25rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.75rem;
}
.brand-title {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.brand-icon { font-size: 24px; }
.brand h2 { font-size: 18px; letter-spacing: 1px; line-height: 1.2; }
.brand-sub { font-size: 11px; color: var(--text-secondary); }

.nav-menu { flex-grow: 1; padding: 0 0.75rem; }
.nav-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    text-align: left;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 13.5px;
    margin-bottom: 0.25rem;
    transition: all 0.15s;
    font-family: inherit;
}
.nav-item .icon { margin-right: 0.7rem; font-size: 16px; }
.nav-item:hover { background-color: var(--surface-hover); color: var(--text-primary); }
.nav-item.active { background-color: var(--primary-color); color: #ffffff; font-weight: 600; }
.sidebar-bottom {
    padding: 0.75rem 0.75rem 0;
    border-top: 1px solid var(--border-color);
}
.user-info {
    padding: 0.4rem 0.9rem;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Main Content & Topbar */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100vh;
    overflow: hidden;
}
.topbar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1.75rem;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.topbar-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.topbar-left {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.page-subtitle {
    font-size: 12.5px;
    color: var(--text-secondary);
}
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.filter-badge {
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 10px;
    padding: 0 6px;
    font-size: 11px;
    margin-left: 2px;
}

/* Filters Bar */
.filters-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.filters-inputs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
}
.filter-search-wrap {
    min-width: 210px;
    flex: 1;
}
.filters-inputs select {
    width: auto;
    min-width: 125px;
    padding: 0.45rem 0.6rem;
    font-size: 12.5px;
}
.filters-inputs input {
    padding: 0.45rem 0.65rem;
    font-size: 12.5px;
}
.filters-buttons {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}

/* Content Wrapper */
.content-wrapper {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem 1.75rem;
    position: relative;
}

/* 1. Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-card {
    background-color: var(--surface-color);
    padding: 1.2rem 1.25rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.stat-card.clickable { cursor: pointer; }
.stat-card.clickable:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}
.stat-card-alert {
    border-left: 4px solid var(--danger-color);
}
.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.35rem;
}
.stat-card h3 { color: var(--text-secondary); font-size: 12.5px; font-weight: 600; }
.stat-icon { font-size: 18px; }
.stat-value { font-size: 30px; font-weight: 700; color: var(--text-primary); line-height: 1.2; }
.stat-sub { font-size: 11.5px; color: var(--text-secondary); margin-top: 0.25rem; }

.dashboard-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}
.dash-panel {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}
.dash-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}
.dash-panel-header h3 { font-size: 15px; }
.dash-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 340px;
    overflow-y: auto;
}
.dash-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border-radius: var(--border-radius-sm);
    background-color: var(--surface-elevated);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
}
.dash-item:hover {
    background-color: var(--surface-hover);
    border-color: var(--primary-color);
}
.dash-item-main {
    min-width: 0;
    flex: 1;
}
.dash-item-title {
    font-weight: 600;
    font-size: 13.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.2rem;
}
.dash-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    font-size: 11.5px;
    color: var(--text-secondary);
    align-items: center;
}
.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 1.5rem 1rem;
    font-size: 13px;
}

/* Status & Platform Breakdown */
.status-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}
.status-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 12.5px;
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    border-radius: var(--border-radius-sm);
}
.status-row:hover { background-color: var(--surface-hover); }
.status-row-label { width: 100px; font-weight: 500; flex-shrink: 0; }
.status-bar-track {
    flex: 1;
    height: 8px;
    background-color: var(--surface-hover);
    border-radius: 4px;
    overflow: hidden;
}
.status-bar-fill { height: 100%; border-radius: 4px; transition: width 0.3s ease; }
.status-row-count { width: 45px; text-align: right; font-weight: 600; color: var(--text-secondary); }

.platform-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}
.platform-stat-box {
    background-color: var(--surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.85rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s;
}
.platform-stat-box:hover { border-color: var(--primary-color); }
.platform-stat-name { font-size: 12.5px; color: var(--text-secondary); margin-bottom: 0.25rem; font-weight: 500; }
.platform-stat-num { font-size: 22px; font-weight: 700; color: var(--text-primary); }

/* Badges & Tags */
.tag {
    background-color: var(--secondary-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.12rem 0.45rem;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
}
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 600;
    color: #fff;
}
.status-bg-1 { background-color: var(--status-1); }
.status-bg-2 { background-color: var(--status-2); }
.status-bg-3 { background-color: var(--status-3); color: #111; }
.status-bg-4 { background-color: var(--status-4); }
.status-bg-5 { background-color: var(--status-5); }
.status-bg-6 { background-color: var(--status-6); }
.status-bg-7 { background-color: var(--status-7); }

.deadline-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}
.deadline-danger {
    background-color: var(--danger-soft);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}
.deadline-warning {
    background-color: var(--warning-soft);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}
.deadline-ok {
    background-color: var(--success-soft);
    color: var(--success-color);
}

/* 2. Kanban Board */
#board-content {
    height: calc(100vh - 155px);
    overflow-x: auto;
    overflow-y: hidden;
}
.kanban-board {
    display: flex;
    gap: 1rem;
    height: 100%;
    align-items: flex-start;
    padding-bottom: 0.5rem;
}
.kanban-column {
    background-color: var(--surface-elevated);
    border-radius: var(--border-radius);
    min-width: 285px;
    width: 285px;
    max-height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}
.column-header {
    padding: 0.85rem 1rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--surface-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}
.column-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}
.column-header .count {
    background-color: var(--secondary-color);
    color: var(--text-secondary);
    padding: 0.1rem 0.5rem;
    border-radius: 12px;
    font-size: 11.5px;
}
.col-add-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
}
.col-add-btn:hover {
    background-color: var(--surface-hover);
    color: var(--primary-color);
}
.column-body {
    padding: 0.65rem;
    flex-grow: 1;
    overflow-y: auto;
    min-height: 120px;
}
.post-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-sm);
    padding: 0.85rem;
    margin-bottom: 0.65rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    position: relative;
}
.post-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}
.post-card.card-overdue {
    border-left: 3px solid var(--danger-color);
}
.post-card-thumb {
    width: 100%;
    height: 110px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    background-color: var(--surface-hover);
    display: block;
}
.post-card-title {
    font-weight: 600;
    margin-bottom: 0.45rem;
    font-size: 13.5px;
    line-height: 1.4;
    word-break: break-word;
}
.post-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    font-size: 11.5px;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}
.post-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    padding-top: 0.45rem;
    border-top: 1px dashed var(--border-color);
    font-size: 11.5px;
    color: var(--text-secondary);
}
.card-links {
    display: flex;
    gap: 0.35rem;
}
.card-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px 6px;
    font-size: 11px;
    border-radius: 4px;
    background-color: var(--primary-soft);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}
.card-link-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* 3. List View (Table) */
.list-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.list-sort-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.list-sort-controls label { margin: 0; }
.list-sort-controls select { width: auto; padding: 0.4rem 0.65rem; font-size: 13px; }

.table-responsive {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
}
.posts-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13px;
}
.posts-table th {
    background-color: var(--surface-elevated);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    font-size: 12px;
}
.posts-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}
.posts-table tbody tr:hover {
    background-color: var(--surface-hover);
}
.table-title-cell {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 200px;
}
.table-thumb {
    width: 56px;
    height: 36px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}
.table-title-text {
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
}
.table-title-text:hover { color: var(--primary-color); text-decoration: underline; }
.table-memo-sub {
    font-size: 11.5px;
    color: var(--text-secondary);
    max-width: 260px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.inline-status-select {
    width: auto;
    min-width: 125px;
    padding: 0.3rem 0.5rem;
    font-size: 12.5px;
    font-weight: 600;
    border-radius: 6px;
}
.table-actions {
    display: flex;
    gap: 0.35rem;
    white-space: nowrap;
}

/* 4. Calendar */
#calendar-content {
    height: calc(100vh - 165px);
    min-height: 480px;
    display: flex;
    flex-direction: column;
}
.calendar-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}
#calendar {
    flex: 1; min-height: 0;
    --fc-page-bg-color: var(--surface-color);
    --fc-neutral-bg-color: var(--surface-elevated);
    --fc-neutral-text-color: var(--text-secondary);
    --fc-list-event-hover-bg-color: var(--surface-hover);
}
.fc-theme-standard th { background-color: var(--surface-elevated); border-color: var(--border-color) !important; color: var(--text-secondary); padding: 8px 0; }
.fc-theme-standard td, .fc-theme-standard .fc-scrollgrid { border-color: var(--border-color) !important; }
.fc .fc-daygrid-day.fc-day-today { background-color: var(--primary-soft) !important; }
.fc .fc-button-primary { background-color: var(--primary-color) !important; border-color: var(--primary-color) !important; }
.fc .fc-button-primary:hover { background-color: var(--primary-hover) !important; }
.fc-event { cursor: pointer; border-radius: 4px; padding: 2px 4px; font-size: 11.5px; border: none; }
.fc-event-title { font-weight: 500; }
.fc-theme-standard .fc-popover {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: 1050;
}
.fc-theme-standard .fc-popover-header {
    background-color: var(--surface-hover);
    color: var(--text-primary);
    padding: 0.5rem;
}
.fc-theme-standard .fc-popover-body {
    background-color: var(--surface-color);
    color: var(--text-primary);
    padding: 0.5rem;
}
.fc .fc-more-link {
    background-color: var(--secondary-hover);
    color: var(--text-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

/* 5. Settings View */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 1.5rem;
}
.settings-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}
.settings-card h3 { margin-bottom: 0.35rem; }
.settings-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-color);
}
.master-list {
    list-style: none;
    margin-bottom: 1rem;
    max-height: 280px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
}
.master-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    gap: 0.5rem;
}
.master-list li:last-child { border-bottom: none; }
.master-item-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}
.master-count {
    font-size: 11px;
    color: var(--text-secondary);
    background-color: var(--secondary-color);
    padding: 1px 6px;
    border-radius: 10px;
}
.master-item-actions {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
}
.master-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 11.5px;
    cursor: pointer;
    color: var(--text-primary);
}
.master-btn:hover { background-color: var(--surface-hover); }
.master-btn-danger { color: var(--danger-color); }
.add-master-form { display: flex; gap: 0.5rem; }

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    padding: 1rem;
}
.modal-content {
    background-color: var(--surface-color);
    width: 100%;
    max-width: 820px;
    max-height: 92vh;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}
.modal-header {
    padding: 1.15rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header .close-modal {
    background: none;
    border: none;
    font-size: 26px;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
}
.modal-body {
    padding: 1.25rem 1.5rem;
    overflow-y: auto;
}
.calculated-dates {
    background-color: var(--surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.6rem 0.85rem;
    font-size: 12.5px;
}
.calc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
    font-size: 11.5px;
}
.calc-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.thumbnail-preview-box {
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.35rem;
    background-color: var(--surface-elevated);
    max-width: 240px;
}
.thumbnail-preview-box img {
    width: 100%;
    max-height: 130px;
    object-fit: contain;
    display: block;
    border-radius: 4px;
}
.modal-footer {
    padding: 1rem 1.5rem 0.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}
.modal-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.timestamps { font-size: 11.5px; color: var(--text-secondary); }

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    padding: 0.9rem 1.25rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    z-index: 2500;
    font-weight: 500;
}

/* Responsive: fixed app shell, independently scrolling content. */
@media (max-width: 768px) {
    .mobile-only:not(.hidden), .mobile-filter-toggle:not(.hidden) { display: inline-flex !important; }
    .desktop-nav-label { display: none; }
    html, body { height: 100%; }
    #main-view {
        position: fixed;
        inset: 0;
        height: 100%;
        height: 100dvh;
        min-height: 0;
        overflow: hidden;
        flex-direction: column-reverse;
    }
    .main-content { flex: 1; height: auto; min-height: 0; overflow: hidden; }
    .sidebar {
        position: relative;
        width: 100%;
        height: calc(64px + env(safe-area-inset-bottom, 0px));
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border-color);
        padding: 0 env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
        z-index: 1200;
        background: var(--surface-color);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.15);
    }
    .brand, .sidebar-bottom { display: none; }
    .nav-menu {
        display: grid;
        grid-template-columns: repeat(5, minmax(0, 1fr));
        width: 100%;
        padding: 0;
    }
    .nav-item {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        margin: 0;
        padding: 4px 2px;
        font-size: 11px;
        border-radius: 0;
        text-align: center;
        min-width: 0;
        min-height: 44px;
        white-space: nowrap;
        border-top: 3px solid transparent;
    }
    .nav-item .icon { margin: 0 0 2px; font-size: 18px; }
    .nav-item.active { background: var(--primary-soft); color: var(--primary-color); border-top-color: var(--primary-color); }
    .topbar {
        padding: max(8px, env(safe-area-inset-top, 0px)) max(12px, env(safe-area-inset-right, 0px)) 10px max(12px, env(safe-area-inset-left, 0px));
        position: relative;
        z-index: 1100;
        gap: 10px;
        max-height: 65%;
        overflow-y: auto;
        overscroll-behavior: contain;
    }
    .topbar-header-row {
        display: grid;
        grid-template-columns: minmax(0, 1fr) repeat(3, 44px);
        gap: 8px;
        align-items: center;
    }
    .topbar-left { min-width: 0; grid-area: 1 / 1; display: block; }
    .topbar-left h2 { font-size: 17px; line-height: 1.4; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .topbar-actions { display: contents; }
    .topbar-actions > a { grid-area: 1 / 2; }
    #theme-toggle-btn { grid-area: 1 / 3; }
    #mobile-logout-btn { grid-area: 1 / 4; }
    #toggle-filter-btn { grid-area: 2 / 1; padding: 0 8px; }
    #add-post-btn { grid-row: 2; grid-column: 1 / -1; }
    .topbar-header-row:has(#toggle-filter-btn:not(.hidden)) #add-post-btn { grid-column: 2 / -1; }
    .page-subtitle { display: none; }
    .filters-bar.mobile-collapsed { display: none !important; }
    .filters-inputs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
    .filter-search-wrap { grid-column: 1 / -1; min-width: 0; }
    .filters-inputs select { width: 100%; min-width: 0; }
    .filters-buttons { width: 100%; justify-content: flex-end; }
    .content-wrapper {
        flex: 1;
        min-height: 0;
        min-width: 0;
        padding: 12px max(12px, env(safe-area-inset-right, 0px)) 20px max(12px, env(safe-area-inset-left, 0px));
        overflow: auto;
        overscroll-behavior: contain;
        scroll-padding-block: 12px;
    }
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .stat-card { padding: 12px; min-width: 0; }
    .stat-header { gap: 6px; }
    .stat-value { font-size: 24px; }
    .dashboard-panels { grid-template-columns: minmax(0, 1fr); }
    .dash-panel-header { flex-wrap: wrap; }
    #board-content { height: 100%; min-height: 0; overflow-x: auto; scroll-snap-type: x proximity; overscroll-behavior-x: contain; }
    .kanban-board { padding: 4px 0 12px; gap: 12px; }
    .kanban-column { flex: 0 0 min(84vw, 360px); min-width: 0; width: min(84vw, 360px); max-height: 100%; scroll-snap-align: start; }
    .column-body { min-height: 0; overscroll-behavior-y: contain; }
    .posts-table thead { display: none; }
    .posts-table, .posts-table tbody, .posts-table tr, .posts-table td { display: block; width: 100%; }
    .posts-table tr { padding: 14px; border-bottom: 1px solid var(--border-color); }
    .posts-table td { padding: 5px 0; border: none; overflow-wrap: anywhere; }
    .posts-table td:empty { display: none; }
    .table-title-cell { min-width: 0; }
    .table-title-cell > div { min-width: 0; }
    .table-title-text, .post-card { overflow-wrap: anywhere; }
    .table-memo-sub { max-width: 100%; }
    .list-sort-controls { width: 100%; flex-wrap: wrap; }
    .list-sort-controls select { flex: 1; min-width: 0; }
    .settings-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
    .settings-card { padding: 16px; min-width: 0; }
    .add-master-form input, .url-input-group input { min-width: 0; }
    .master-list li { flex-wrap: wrap; }
    .master-item-info { overflow-wrap: anywhere; }
    #calendar-content { height: 100%; min-height: 420px; }
    .fc .fc-toolbar { flex-direction: column; gap: 6px; }
    .fc .fc-toolbar-title { font-size: 1.05rem !important; }
    .fc .fc-button { min-height: 44px; min-width: 44px; }
    .modal { padding: 0; height: 100%; height: 100dvh; }
    .modal-content { width: 100%; height: 100%; max-height: 100%; border-radius: 0; border: none; }
    .modal-header { flex-shrink: 0; padding: max(8px, env(safe-area-inset-top, 0px)) 12px 8px; }
    .modal-body { flex: 1; min-height: 0; padding: 16px; overscroll-behavior: contain; }
    .modal-footer { flex-shrink: 0; margin: 0; padding: 10px 12px max(10px, env(safe-area-inset-bottom, 0px)); background: var(--surface-color); gap: 4px; }
    .modal-actions { display: flex; flex-wrap: wrap; width: 100%; gap: 8px; }
    .modal-actions .btn { flex: 1 1 calc(50% - 8px); }
    .modal-actions .close-modal { font-size: 14px; line-height: 1.5; }
    .timestamps { width: 100%; font-size: 10px; }
    .form-row { flex-direction: column; gap: 0; }
    .form-row .form-group { flex: auto !important; min-width: 0; width: 100%; }
    input[type="text"], input[type="password"], input[type="number"], input[type="url"], input[type="datetime-local"], select, textarea,
    .filters-inputs select, .filters-inputs input, .list-sort-controls select { font-size: 16px; min-height: 44px; }
    .btn, .btn-sm, .btn-icon, .btn-link, .master-btn, .col-add-btn, .close-modal, .card-link-btn { min-height: 44px; min-width: 44px; }
    .checkbox-group label { min-height: 44px; }
    .btn-link { display: inline-flex; align-items: center; }
    .toast { bottom: calc(76px + env(safe-area-inset-bottom, 0px)); left: 16px; right: 16px; }
}
:focus-visible { outline: 2px solid var(--primary-color); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}