:root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --border: #dfe3e8;
    --text: #1f2430;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --danger-hover: #b91c1c;
    --success: #15803d;
    --success-bg: #dcfce7;
    --warn: #b45309;
    --warn-bg: #fef3c7;
    --neutral-bg: #ececec;
    --info-bg: #e0e7ff;
    --info-text: #3730a3;
    --radius: 6px;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161c;
        --panel: #1b1e26;
        --border: #2c303a;
        --text: #e5e7eb;
        --text-muted: #9099a8;
        --accent: #5b8cff;
        --accent-hover: #7ea0ff;
        --danger: #f87171;
        --danger-bg: #3f1f22;
        --danger-hover: #dc5b5b;
        --success: #4ade80;
        --success-bg: #16321f;
        --warn: #fbbf24;
        --warn-bg: #3a2c0f;
        --neutral-bg: #2a2e38;
        --info-bg: #232a4d;
        --info-text: #93a5fd;
        color-scheme: dark;
    }
}

:root[data-theme="light"] {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --border: #dfe3e8;
    --text: #1f2430;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --danger-hover: #b91c1c;
    --success: #15803d;
    --success-bg: #dcfce7;
    --warn: #b45309;
    --warn-bg: #fef3c7;
    --neutral-bg: #ececec;
    --info-bg: #e0e7ff;
    --info-text: #3730a3;
    color-scheme: light;
}

:root[data-theme="dark"] {
    --bg: #14161c;
    --panel: #1b1e26;
    --border: #2c303a;
    --text: #e5e7eb;
    --text-muted: #9099a8;
    --accent: #5b8cff;
    --accent-hover: #7ea0ff;
    --danger: #f87171;
    --danger-bg: #3f1f22;
    --danger-hover: #dc5b5b;
    --success: #4ade80;
    --success-bg: #16321f;
    --warn: #fbbf24;
    --warn-bg: #3a2c0f;
    --neutral-bg: #2a2e38;
    --info-bg: #232a4d;
    color-scheme: dark;
    --info-text: #93a5fd;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.45;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

nav.topbar {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 54px;
}

nav.topbar .brand { font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 10px; }
nav.topbar .brand-logo { height: 34px; width: auto; display: block; }
nav.topbar .links { display: flex; gap: 18px; align-items: center; }
nav.topbar .links a { color: var(--text); font-weight: 500; }
nav.topbar .links a.active { color: var(--accent); }
nav.topbar form { display: inline; }
nav.topbar button.link-button {
    background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 0;
}

main.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 24px 0 10px; }
h3 { font-size: 15px; margin: 16px 0 8px; }

.flash { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 14px; font-size: 14px; }
.flash-error { background: var(--danger-bg); color: var(--danger); }
.flash-success { background: var(--success-bg); color: var(--success); }

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 18px;
}

.grid-2 { display: grid; grid-template-columns: 220px 1fr; gap: 20px; align-items: start; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-maintenance { background: var(--warn-bg); color: var(--warn); }
.badge-retired { background: var(--neutral-bg); color: var(--text-muted); }
.badge-planned { background: var(--info-bg); color: var(--info-text); }
.badge-confirmed { background: var(--success-bg); color: var(--success); }
.badge-completed { background: var(--neutral-bg); color: var(--text-muted); }
.badge-cancelled { background: var(--danger-bg); color: var(--danger); }
.badge-damaged { background: var(--warn-bg); color: var(--warn); }
.badge-disposed { background: var(--neutral-bg); color: var(--text-muted); }
.badge-lost { background: var(--danger-bg); color: var(--danger); }

input[type=text], input[type=password], input[type=date], input[type=number], select, textarea {
    padding: 7px 9px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    width: 100%;
    background: var(--panel);
    color: var(--text);
}

label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--text-muted); }
.field { margin-bottom: 12px; }

.button, button.button {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.button:hover { background: var(--accent-hover); text-decoration: none; }
.button-secondary { background: var(--panel); color: var(--text); border: 1px solid var(--border); }
.button-secondary:hover { background: var(--bg); }
.button-danger { background: var(--danger); }
.button-danger:hover { background: var(--danger-hover); }
.button-small { padding: 4px 9px; font-size: 12px; }

.inline-form { display: inline; }

.form-row { display: flex; gap: 12px; }
.form-row > .field { flex: 1; }

.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tabs a {
    padding: 8px 14px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 14px;
    border-bottom: 2px solid transparent;
}
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); }

.search-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.search-bar input { flex: 1; }

.category-list { list-style: none; margin: 0; padding: 0; }
.category-list li { margin-bottom: 4px; }
.category-list a { display: flex; justify-content: space-between; padding: 6px 8px; border-radius: var(--radius); color: var(--text); }
.category-list a.active, .category-list a:hover { background: var(--bg); text-decoration: none; }
.category-list .count { color: var(--text-muted); font-size: 12px; }

.muted { color: var(--text-muted); }
.empty-state { color: var(--text-muted); padding: 20px 0; text-align: center; }

.login-wrap {
    max-width: 360px;
    margin: 80px auto;
    text-align: center;
}

.login-logo { height: 96px; width: auto; margin: 0 auto 12px; display: block; }
.login-wrap form { text-align: left; }

.stat-row { display: flex; gap: 16px; margin-bottom: 20px; }
.stat {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    flex: 1;
}
.stat .number { font-size: 24px; font-weight: 700; }
.stat .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }

.asset-tag { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

.theme-toggle-btn {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--panel);
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle-btn:hover { background: var(--bg); }
.theme-toggle-fixed {
    position: fixed;
    top: 12px;
    right: 16px;
    z-index: 100;
    width: 34px;
    height: 34px;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}
.calendar-header h2 { min-width: 200px; text-align: center; }

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 20px;
}
.calendar-weekday {
    background: var(--panel);
    padding: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.calendar-day {
    background: var(--panel);
    min-height: 92px;
    padding: 6px;
}
.calendar-day.outside-month { background: var(--bg); }
.calendar-day.outside-month .calendar-day-number { color: var(--text-muted); }
.calendar-day-number { font-size: 12px; font-weight: 600; margin-bottom: 4px; }
.calendar-day.is-today .calendar-day-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
}
.calendar-event {
    display: block;
    font-size: 11px;
    padding: 1px 5px;
    border-radius: 4px;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.calendar-event.badge-planned { background: var(--info-bg); color: var(--info-text); }
.calendar-event.badge-confirmed { background: var(--success-bg); color: var(--success); }
.calendar-event.badge-completed { background: var(--neutral-bg); color: var(--text-muted); }
.calendar-event.badge-cancelled { background: var(--danger-bg); color: var(--danger); text-decoration: line-through; }

.cat-node { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 6px; background: var(--panel); }
.cat-node summary {
    cursor: pointer;
    padding: 8px 12px;
    font-weight: 600;
    font-size: 14px;
    list-style: revert;
}
.cat-node summary::marker { color: var(--text-muted); }
.cat-node-body { padding: 4px 12px 10px 24px; }
.cat-node .cat-node { background: var(--bg); }

.cat-item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}
.cat-item-row:last-child { border-bottom: none; }
.cat-item-info { display: flex; align-items: center; gap: 8px; font-size: 13px; }

.checkout-scan-row { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.checkout-scan-row input[type=text] { font-size: 16px; padding: 10px 12px; }
.checkout-scan-row .scan-icon { font-size: 20px; }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}
.modal-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    width: 420px;
    max-width: 92vw;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-box h3 { margin-top: 0; }
.modal-item-row { display: flex; align-items: center; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.modal-item-row:last-child { border-bottom: none; }
.modal-actions { display: flex; gap: 8px; margin-top: 16px; }

.scan-flash { padding: 8px 12px; border-radius: var(--radius); font-size: 13px; margin-bottom: 10px; }
.scan-flash-ok { background: var(--success-bg); color: var(--success); }
.scan-flash-error { background: var(--danger-bg); color: var(--danger); }

.app-footer {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 20px 32px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}