:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1a1f36;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --border: #e5e7eb;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: min(960px, 92%);
    margin: 0 auto;
}

.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.main-nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.main-nav a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
}

.main-nav a:hover {
    color: var(--primary);
}

main {
    flex: 1;
    padding-bottom: 3rem;
}

.site-footer {
    padding: 1.5rem 0;
    color: var(--muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.page-header {
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.muted {
    color: var(--muted);
}

.back-link {
    display: inline-block;
    margin-top: 0.5rem;
    color: var(--primary);
    text-decoration: none;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.auth-card {
    max-width: 420px;
    margin: 2rem auto;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
}

input, select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    margin-bottom: 1rem;
}

input:focus, select:focus {
    outline: 2px solid rgba(37, 99, 235, 0.3);
    border-color: var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
}

.btn-danger {
    background: var(--danger);
    color: white;
    margin-top: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-weight: 600;
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-available { background: #dcfce7; color: #166534; }
.badge-reserved { background: #fef3c7; color: #92400e; }
.badge-broken { background: #fee2e2; color: #991b1b; }
.badge-maintenance { background: #e0e7ff; color: #3730a3; }
.badge-confirmed { background: #dcfce7; color: #166534; }
.badge-pending_item { background: #fef3c7; color: #92400e; }
.badge-rejected, .badge-cancelled { background: #fee2e2; color: #991b1b; }

.detail-list {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 0.75rem 1rem;
}

.detail-list dt {
    font-weight: 600;
    color: var(--muted);
}

.hint {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--muted);
}

.hint ul {
    margin-left: 1.2rem;
    margin-top: 0.5rem;
}

.hidden {
    display: none !important;
}

.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.85rem 1.25rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-width: 360px;
}

.toast.success { background: #16a34a; }
.toast.error { background: #dc2626; }

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .detail-list {
        grid-template-columns: 1fr;
    }

    .main-nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}