/* ── Variables ── */
:root {
    --bg-primary: #1a1b23;
    --bg-secondary: #22232e;
    --bg-card: #2a2b38;
    --bg-input: #32333f;
    --bg-hover: #353647;
    --border: #3a3b4a;
    --text-primary: #e4e4e8;
    --text-secondary: #9d9db0;
    --text-muted: #6b6b80;
    --accent: #6c8cff;
    --accent-hover: #8ba3ff;
    --success: #4caf7c;
    --warning: #e0a040;
    --danger: #e05555;
    --info: #50b0d0;
    --sidebar-width: 220px;
    --radius: 8px;
    --radius-sm: 4px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* ── Layout ── */
#app {
    display: flex;
    min-height: 100vh;
}

#sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 10;
}

.sidebar-brand {
    padding: 20px 16px;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    letter-spacing: 0.5px;
}

.nav-links {
    list-style: none;
    padding: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 0.15s, color 0.15s;
    font-size: 14px;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--accent);
    color: #fff;
}

.nav-icon {
    font-size: 12px;
    font-weight: 700;
    width: 24px;
    text-align: center;
    opacity: 0.8;
}

#content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    max-width: 1200px;
}

.page { animation: fadeIn 0.15s ease; }
.hidden { display: none !important; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Typography ── */
.page-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 16px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

/* ── Stats Grid ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* ── Status Badges ── */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-pending { background: #3a3b4a; color: var(--text-secondary); }
.badge-active { background: rgba(76, 175, 124, 0.2); color: var(--success); }
.badge-paused { background: rgba(224, 160, 64, 0.2); color: var(--warning); }
.badge-completed { background: rgba(108, 140, 255, 0.2); color: var(--accent); }
.badge-abandoned { background: rgba(224, 85, 85, 0.2); color: var(--danger); }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    font-family: inherit;
}

.btn:hover { background: var(--bg-hover); border-color: var(--text-muted); }

.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }

.btn-warning { background: var(--warning); border-color: var(--warning); color: #1a1b23; }
.btn-warning:hover { opacity: 0.9; }

.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* ── Forms ── */
.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.15s;
}

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

.form-textarea { resize: vertical; min-height: 60px; }

.form-inline {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.form-inline .form-group { margin-bottom: 0; flex: 1; }

/* ── Tables ── */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
}

tr:hover td { background: var(--bg-hover); }

/* ── Tabs / Filters ── */
.filter-bar {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.filter-btn:hover { border-color: var(--text-muted); color: var(--text-primary); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Active Task Card ── */
.active-task-card {
    border-left: 3px solid var(--success);
}

.active-task-card .card-title {
    color: var(--success);
}

.no-active-task {
    color: var(--text-muted);
    font-style: italic;
    padding: 12px 0;
}

/* ── Task List ── */
.task-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 8px;
    cursor: pointer;
    transition: border-color 0.15s;
}

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

.task-item-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.task-item-title {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.task-item-meta {
    font-size: 12px;
    color: var(--text-muted);
}

/* ── Task Detail ── */
.task-detail { margin-top: 16px; }

.task-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.task-detail-title {
    font-size: 20px;
    font-weight: 600;
}

.task-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.meta-item {
    font-size: 13px;
}

.meta-label {
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.note-item {
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 13px;
}

.note-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.note-type {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
}

.note-time {
    font-size: 11px;
    color: var(--text-muted);
}

/* ── Context Summary ── */
.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

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

.summary-app {
    font-weight: 500;
}

.summary-category {
    font-size: 12px;
    color: var(--text-muted);
}

.summary-count {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    min-width: 50px;
    text-align: right;
}

/* ── Modal ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    min-width: 400px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalIn 0.15s ease;
}

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

.modal-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
}

/* ── Utilities ── */
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

/* ── Breadcrumbs ── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.breadcrumb-link {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s;
}

.breadcrumb-link:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.breadcrumb-sep {
    color: var(--text-muted);
    margin: 0 2px;
}

.breadcrumb-current {
    color: var(--text-secondary);
}

.breadcrumb-parent {
    color: var(--text-muted);
}

/* ── Subtasks ── */
.subtask-list {
    margin-bottom: 8px;
}

.subtask-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}

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

.subtask-item-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.subtask-item-title {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
}

.subtask-item-title:hover {
    color: var(--accent);
}

.subtask-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: 10px;
    background: var(--bg-hover);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }