:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --text: #1f2937;
    --muted: #6b7280;
    --danger: #dc2626;
    --warning: #f59e0b;
    --border: #e5e7eb;
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    padding-bottom: 72px;
}

.topbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 14px 18px;
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand {
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 8px;
}

.topnav {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.topnav a,
.mobile-nav a {
    text-decoration: none;
    color: var(--text);
    font-size: 14px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.stat p {
    font-size: 28px;
    font-weight: 700;
    margin: 8px 0 0;
}

.btn {
    border: none;
    border-radius: 12px;
    padding: 12px 16px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

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

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

.form-card p,
.inline-form p {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 16px;
    background: #fff;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.alert {
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 12px;
}

.alert.success {
    background: #dcfce7;
    color: #166534;
}

.alert.error {
    background: #fee2e2;
    color: #991b1b;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.search-bar {
    display: flex;
    gap: 8px;
    align-items: center;
}

.search-bar input {
    flex: 1;
}

.scanner-box {
    width: 100%;
    min-height: 260px;
}

.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    padding: 12px 8px;
    z-index: 30;
}

.login-page {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    background: white;
    padding: 24px;
    width: 100%;
    max-width: 420px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

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

@media (min-width: 768px) {
    .mobile-nav {
        display: none;
    }
}