:root {
    --bg: #0e0f11;
    --bg-card: #16181c;
    --bg-card-hover: #1c1f24;
    --bg-input: #1c1f24;
    --bg-modal: #16181c;
    --border: #2a2d35;
    --border-focus: #4a8eff;
    --text: #e4e6ea;
    --text-muted: #8b8f98;
    --text-dim: #5c5f68;
    --accent: #4a8eff;
    --accent-hover: #6ba0ff;
    --accent-subtle: rgba(74, 142, 255, 0.12);
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --font: 'DM Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --radius: 8px;
    --radius-sm: 5px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --color-flight: #4a8eff;
    --color-train: #22c55e;
    --color-bus: #f59e0b;
    --color-road: #a855f7;
    --sidebar-width: 192px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 15px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.5; min-height: 100dvh; overflow-x: hidden; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border: none; border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.87rem; font-weight: 500; cursor: pointer; transition: all 0.15s ease; white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-card); color: var(--text); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid transparent; }
.btn-danger:hover { background: rgba(239, 68, 68, 0.1); }
.btn svg { flex-shrink: 0; }
.btn-ghost.active { background: var(--accent-subtle); border-color: var(--accent); color: var(--accent); }
.btn.syncing svg { animation: spin 0.8s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ── Sidebar (mobile: horizontal topbar; desktop: vertical rail) ─────────── */
.sidebar {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 100;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
}

.logo { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.02em; cursor: pointer; user-select: none; }

.sidebar-actions { display: flex; flex-direction: row; gap: 8px; align-items: center; }

/* Filter section — toggle hidden on mobile, panel always visible */
.sidebar-filter-toggle { display: none; }

.filter-panel {
    display: flex;
    flex-direction: row;
    gap: 6px;
    padding: 8px 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.filter-panel::-webkit-scrollbar { display: none; }

/* ── Filter chips ────────────────────────────────────────────────────────── */
.chip { padding: 5px 14px; border-radius: 20px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); font-family: var(--font); font-size: 0.8rem; font-weight: 500; cursor: pointer; transition: all 0.15s; white-space: nowrap; }
.chip:hover { border-color: var(--text-dim); color: var(--text); }
.chip.active { background: var(--accent-subtle); border-color: var(--accent); color: var(--accent); }

/* ── Content area ────────────────────────────────────────────────────────── */
.trip-list { padding: 8px; max-width: 800px; margin: 0 auto; }
.loading { text-align: center; color: var(--text-muted); padding: 48px 16px; font-size: 0.9rem; display: none; }

/* ── Trip cards ──────────────────────────────────────────────────────────── */
.trip-card { display: flex; align-items: stretch; gap: 12px; padding: 14px 16px; margin-bottom: 4px; border-radius: var(--radius); background: var(--bg-card); cursor: pointer; transition: background 0.12s; border: 1px solid transparent; }
.trip-card:hover { background: var(--bg-card-hover); border-color: var(--border); }

.trip-type-indicator { width: 3px; border-radius: 2px; flex-shrink: 0; }
.trip-type-indicator.flight { background: var(--color-flight); }
.trip-type-indicator.train { background: var(--color-train); }
.trip-type-indicator.bus { background: var(--color-bus); }
.trip-type-indicator.road { background: var(--color-road); }

.trip-main { flex: 1; min-width: 0; }
.trip-route { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }
.trip-code { font-family: var(--font-mono); font-size: 0.95rem; font-weight: 500; letter-spacing: -0.01em; }
.trip-arrow { color: var(--text-dim); font-size: 0.75rem; }
.trip-number { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); margin-left: auto; }
.trip-details { display: flex; gap: 12px; font-size: 0.78rem; color: var(--text-muted); flex-wrap: wrap; }
.trip-detail-item { display: flex; align-items: center; gap: 3px; }
.trip-meta { display: flex; flex-direction: column; align-items: flex-end; justify-content: center; flex-shrink: 0; }
.trip-date { font-size: 0.78rem; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.trip-vehicle { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim); margin-top: 2px; }

.empty-state { text-align: center; padding: 64px 24px; color: var(--text-muted); }
.empty-state h3 { font-size: 1rem; margin-bottom: 8px; color: var(--text); }
.empty-state p { font-size: 0.85rem; }

/* Future trips */
.trip-card.future { opacity: 0.85; }
.trip-card.future .trip-code,
.trip-card.future .trip-number,
.trip-card.future .trip-details,
.trip-card.future .trip-date { font-style: italic; }

/* Selected trips */
.trip-card.selected { border-color: var(--accent); background: var(--accent-subtle); }
.trip-checkbox { width: 18px; height: 18px; border: 1.5px solid var(--border); border-radius: 4px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 0.7rem; color: #fff; transition: all 0.1s; }
.trip-card.selected .trip-checkbox { background: var(--accent); border-color: var(--accent); }

/* ── Trip count + pagination ─────────────────────────────────────────────── */
.trip-count { text-align: center; padding: 12px 16px 4px; color: var(--text-dim); font-size: 0.78rem; }
.pagination { display: flex; justify-content: center; align-items: center; gap: 4px; padding: 8px 16px 24px; flex-wrap: wrap; }
.pagination:empty { display: none; }
.page-btn { min-width: 32px; height: 32px; padding: 0 8px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: transparent; color: var(--text-muted); font-family: var(--font); font-size: 0.82rem; cursor: pointer; transition: all 0.12s; }
.page-btn:hover:not(:disabled) { background: var(--bg-card); color: var(--text); }
.page-btn.active { background: var(--accent-subtle); border-color: var(--accent); color: var(--accent); font-weight: 600; cursor: default; }
.page-btn:disabled { opacity: 0.3; cursor: default; }
.page-ellipsis { color: var(--text-dim); font-size: 0.82rem; padding: 0 4px; line-height: 32px; }

/* ── Modals ──────────────────────────────────────────────────────────────── */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 200; backdrop-filter: blur(4px); overflow-y: auto; padding: 24px 16px; }
.modal-overlay.open { display: flex; justify-content: center; align-items: flex-start; }
.modal { background: var(--bg-modal); border: 1px solid var(--border); border-radius: 12px; width: 100%; max-width: 560px; box-shadow: 0 16px 48px rgba(0,0,0,0.4); animation: modalIn 0.15s ease; }
@keyframes modalIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h2 { font-size: 1rem; font-weight: 600; }
.modal-close { font-size: 1.4rem; line-height: 1; padding: 4px 8px !important; border: none !important; }

.trip-form { padding: 16px 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group.full-width { grid-column: 1 / -1; margin-bottom: 12px; }
.form-group label { font-size: 0.75rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.form-group label.required::after { content: ' *'; color: var(--danger); font-weight: 600; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 8px 10px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); font-family: var(--font); font-size: 0.87rem; transition: border-color 0.15s; outline: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--border-focus); }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 8px; border-top: 1px solid var(--border); margin-top: 4px; }

.changelog { padding: 12px 20px 16px; border-top: 1px solid var(--border); }
.changelog h3 { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 8px; }
.changelog-entry { display: flex; gap: 8px; padding: 4px 0; font-size: 0.78rem; color: var(--text-muted); border-bottom: 1px solid rgba(42, 45, 53, 0.5); align-items: center; flex-wrap: wrap; }
.changelog-entry:last-child { border-bottom: none; }
.changelog-field { font-family: var(--font-mono); color: var(--text); min-width: 90px; }
.changelog-old { text-decoration: line-through; opacity: 0.5; }
.changelog-new { color: var(--accent); }
.changelog-time { margin-left: auto; font-variant-numeric: tabular-nums; flex-shrink: 0; }
.changelog-source { font-size: 0.7rem; padding: 1px 5px; border-radius: 3px; background: var(--accent-subtle); color: var(--accent); }

/* ── Toasts ──────────────────────────────────────────────────────────────── */
.toast-container { position: fixed; bottom: 16px; right: 16px; z-index: 300; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 10px 16px; border-radius: var(--radius); font-size: 0.85rem; color: #fff; box-shadow: var(--shadow); animation: toastIn 0.2s ease, toastOut 0.3s ease 2.7s forwards; max-width: 320px; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--accent); }
.toast.warning { background: var(--warning); color: #000; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateY(-4px); } }

/* ── Selection action bar ────────────────────────────────────────────────── */
.action-bar { position: fixed; bottom: -72px; left: 0; right: 0; background: var(--bg-card); border-top: 1px solid var(--border); padding: 10px 16px; display: flex; align-items: center; gap: 8px; z-index: 150; transition: bottom 0.2s ease; box-shadow: 0 -4px 16px rgba(0,0,0,0.4); }
.action-bar.visible { bottom: 0; }
.action-count { flex: 1; font-size: 0.87rem; font-weight: 500; color: var(--text); }
body.select-mode .trip-list { padding-bottom: 80px; }
body.select-mode .trip-count { padding-bottom: 88px; }

/* Bulk edit modal hint */
.bulk-hint { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; }

/* ── Mobile: compact icons only ──────────────────────────────────────────── */
@media (max-width: 480px) {
    html { font-size: 14px; }
    .sidebar-header { padding: 8px 10px; }
    .trip-list { padding: 4px; }
    .trip-card { padding: 12px; gap: 8px; }
    .btn .btn-label { display: none; }
    .btn { padding: 7px 10px; }
    .form-row { grid-template-columns: 1fr; gap: 8px; }
    .modal { border-radius: 12px 12px 0 0; margin-top: auto; }
    .modal-overlay.open { align-items: flex-end; padding: 0; }
    .trip-number { display: none; }
}

/* ── Desktop: vertical sidebar ───────────────────────────────────────────── */
@media (min-width: 768px) {
    #app {
        display: flex;
        align-items: flex-start;
        min-height: 100dvh;
    }

    .sidebar {
        width: var(--sidebar-width);
        flex-shrink: 0;
        flex-direction: column;
        position: sticky;
        top: 0;
        height: 100dvh;
        overflow-y: auto;
        border-bottom: none;
        border-right: 1px solid var(--border);
    }

    .sidebar-header {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 16px 10px 10px;
        border-bottom: 1px solid var(--border);
    }

    .logo { font-size: 1rem; padding: 0 4px 8px; }

    .sidebar-actions {
        flex-direction: column;
        gap: 2px;
        align-items: stretch;
    }

    .sidebar-btn {
        width: 100%;
        justify-content: flex-start;
        border-color: transparent !important;
        border-radius: var(--radius-sm);
        padding: 7px 10px;
    }
    .sidebar-btn:hover { border-color: transparent !important; }
    .sidebar-btn.btn-primary { border-color: transparent !important; }

    /* Add Trip + Import CSV group */
    .sidebar-add-group { display: flex; flex-direction: column; gap: 1px; }
    .sidebar-add-group .sidebar-sub-btn svg { width: 13px; height: 13px; }
    .sidebar-add-group .sidebar-sub-btn {
        padding: 5px 10px 5px 28px;
        font-size: 0.8rem;
        color: var(--text-dim);
    }
    .sidebar-add-group .sidebar-sub-btn svg { width: 13px; height: 13px; opacity: 0.7; }
    .sidebar-add-group .sidebar-sub-btn:hover { color: var(--text-muted); }

    /* Filter section */
    .sidebar-filter {
        padding: 10px 10px 8px;
    }

    .sidebar-filter-toggle {
        display: flex;
        width: 100%;
        justify-content: flex-start;
        border-color: transparent !important;
        padding: 6px 10px;
        font-size: 0.82rem;
        color: var(--text-dim);
        margin-bottom: 4px;
    }
    .sidebar-filter-toggle:hover { color: var(--text-muted); border-color: transparent !important; }
    .sidebar-filter-toggle .chevron-icon { margin-left: auto; transition: transform 0.2s; }
    .sidebar-filter-toggle.collapsed .chevron-icon { transform: rotate(-90deg); }

    .filter-panel {
        flex-direction: column;
        padding: 0;
        gap: 2px;
        overflow: visible;
    }
    .filter-panel.hidden { display: none; }

    .filter-panel .chip {
        border-radius: var(--radius-sm);
        width: 100%;
        text-align: left;
        padding: 6px 10px;
        border-color: transparent;
    }
    .filter-panel .chip:hover { border-color: transparent; background: var(--bg-card); }
    .filter-panel .chip.active { border-color: transparent; }

    /* Main content */
    .content-area {
        flex: 1;
        min-width: 0;
    }
}

/* ── Green button ────────────────────────────────────────────────────────── */
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }
.sidebar-btn.btn-success { border-color: transparent !important; }

/* ── In-progress trip card ───────────────────────────────────────────────── */
.trip-card.in-progress { border-color: var(--success); }
.trip-card.in-progress .trip-type-indicator { background: var(--success); }
.in-progress-badge {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
    color: var(--success); padding: 1px 6px; border-radius: 10px;
    border: 1px solid var(--success); margin-left: 6px;
}
.in-progress-badge::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--success);
    animation: livePulse 1.4s ease-in-out infinite;
}
@keyframes livePulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ── Log Trip view ───────────────────────────────────────────────────────── */
.log-view {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 8px 40px;
}

.log-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 8px 8px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
}
.log-title { font-size: 1rem; font-weight: 600; flex: 1; }
.log-back { padding: 6px 10px; }
.log-status { font-size: 0.78rem; color: var(--text-muted); font-variant-numeric: tabular-nums; }

.log-body { display: flex; flex-direction: column; gap: 4px; }

.log-section {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    margin-top: 8px;
}
.log-section-title {
    font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 12px;
    display: flex; align-items: baseline; gap: 6px;
}
.log-section-hint { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--text-dim); }

.log-section .form-row { margin-bottom: 10px; }
.log-section .form-row:last-child { margin-bottom: 0; }

/* Live tracking section */
.log-tracking-section { border-color: rgba(34,197,94,0.25); }
.log-toggle-btn { width: 100%; justify-content: center; }
.btn-danger { background: var(--danger); color: #fff; border-color: transparent !important; }
.btn-danger:hover { background: #dc2626; }

/* Datetime input with "now" button */
.input-now-wrap { display: flex; align-items: stretch; gap: 4px; }
.input-now-wrap > input { flex: 1; min-width: 0; }
.btn-now { flex-shrink: 0; padding: 0 8px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-dim); cursor: pointer; display: flex; align-items: center; transition: all 0.15s; }
.btn-now:hover { color: var(--accent); border-color: var(--border-focus); }

/* Stopwatch */
.log-stopwatch {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.log-clocks {
    display: flex;
    gap: 32px;
    margin-bottom: 14px;
}

.log-clock {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.log-clock-label {
    font-size: 0.68rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--text-muted);
}
.log-clock-time {
    font-family: var(--font-mono);
    font-size: 1.9rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}
#log-remaining-wrap .log-clock-time { color: var(--text-muted); }

/* Progress bar */
.log-progress-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}
.log-progress-bar-track {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-input);
    overflow: hidden;
}
.log-progress-bar-fill {
    height: 100%;
    border-radius: 3px;
    background: var(--success);
    width: 0%;
    transition: width 1s linear;
}
.log-progress-pct {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--success);
    font-variant-numeric: tabular-nums;
    min-width: 36px;
    text-align: right;
}

/* Footer */
.log-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 8px 0;
    margin-top: 4px;
    border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
    .log-tracking-row { flex-direction: column; align-items: stretch; }
    .log-action-btn { width: 100%; justify-content: center; }
    .log-clocks { gap: 20px; }
    .log-clock-time { font-size: 1.5rem; }
}