:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-text: #1a1d23;
    --color-muted: #6b7280;
    --color-border: #e2e5ea;
    --color-primary: #1d6f42;
    --color-primary-dark: #155232;
    --color-danger: #b3261e;
    --color-warning: #9a6700;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 16px;
    line-height: 1.45;
    padding-bottom: 64px;
}

a { color: var(--color-primary); }

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 16px;
}

.topbar {
    background: var(--color-primary);
    color: #fff;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar a { color: #fff; text-decoration: none; font-weight: 600; }

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

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.stat-tile {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px;
}

.stat-tile .value { font-size: 1.5rem; font-weight: 700; }
.stat-tile .label { color: var(--color-muted); font-size: 0.85rem; }

.btn {
    display: inline-block;
    padding: 10px 16px;
    border-radius: var(--radius);
    border: none;
    background: var(--color-primary);
    color: #fff;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
}

.btn:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--color-muted); }
.btn-danger { background: var(--color-danger); }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; }

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    background: #fff;
    color: var(--color-text);
}

.field-error { color: var(--color-danger); font-size: 0.85rem; margin-top: 4px; }

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

.alert-success { background: #e6f4ea; color: #16552f; }
.alert-error { background: #fbe9e7; color: var(--color-danger); }

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-ok { background: #e6f4ea; color: #16552f; }
.badge-at-risk { background: #fff4e0; color: var(--color-warning); }
.badge-in-default { background: #fbe9e7; color: var(--color-danger); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--color-border); }

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.bottom-nav a {
    flex: 1;
    text-align: center;
    padding: 10px 4px;
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.75rem;
}

.bottom-nav a.active { color: var(--color-primary); font-weight: 600; }

.topnav {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    background: var(--color-surface);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    padding: 10px 16px;
}

.topnav::-webkit-scrollbar { display: none; }

.topnav-tab {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    background: var(--color-bg);
    border: 1px solid transparent;
    transition: background 0.15s ease, color 0.15s ease;
}

.topnav-tab:hover {
    background: #e9ebee;
    color: var(--color-text);
}

.topnav-tab.active {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
}

.topnav-icon {
    font-size: 1rem;
    line-height: 1;
}

.topnav-label {
    line-height: 1;
}

@media (max-width: 480px) {
    .topnav-label { display: none; }
    .topnav-tab { padding: 10px; }
    .topnav-icon { font-size: 1.15rem; }
}

.guest-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.guest-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 28px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.06);
}

@media (min-width: 768px) {
    body { padding-bottom: 0; }
    .bottom-nav { display: none; }
}