:root {
    --primary: #1F4E79;
    --primary-dark: #163a5c;
    --accent: #2E86AB;
    --success: #28a745;
    --danger: #dc3545;
    --bg: #f0f4f8;
    --card: #ffffff;
    --text: #1a1a2e;
    --muted: #6c757d;
    --border: #dee2e6;
    --radius: 10px;
    --nav-h: 56px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: var(--accent); }

/* ——— Navbar ——— */
.navbar {
    background: var(--primary);
    color: white;
    padding: 0 1rem;
    height: var(--nav-h);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-brand { font-weight: 700; font-size: 1.05rem; white-space: nowrap; z-index: 102; }
.nav-toggle {
    display: none;
    background: none; border: none; cursor: pointer;
    width: 44px; height: 44px; padding: 10px;
    flex-direction: column; justify-content: center; gap: 5px;
    z-index: 102;
}
.nav-toggle span {
    display: block; height: 2px; width: 22px;
    background: #fff; border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-links { display: flex; gap: 1rem; align-items: center; }
.nav-links a {
    color: rgba(255,255,255,0.9); text-decoration: none; font-size: 0.92rem;
    padding: 0.35rem 0;
}
.nav-links a:hover { color: white; }
.nav-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 99;
}
.nav-overlay.show { display: block; }
body.menu-open { overflow: hidden; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 1rem;
}
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.page-header h1 { font-size: clamp(1.25rem, 4vw, 1.6rem); }
.header-actions {
    display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.85rem;
    margin-bottom: 1.25rem;
}
.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.1rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    text-align: center;
}
.stat-value { font-size: clamp(1.5rem, 5vw, 2rem); font-weight: 700; color: var(--primary); }
.stat-label { color: var(--muted); font-size: 0.85rem; margin-top: 0.2rem; }

.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.15rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    margin-bottom: 1rem;
}
.card h2 { font-size: 1.05rem; margin-bottom: 0.85rem; }

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.list-group { display: flex; flex-direction: column; gap: 0.45rem; }
.list-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.55rem 0.7rem; background: var(--bg); border-radius: 6px;
    gap: 0.5rem; font-size: 0.92rem;
}
.list-item span:first-child { word-break: break-word; }

.badge {
    background: var(--primary); color: white;
    padding: 0.15rem 0.5rem; border-radius: 12px;
    font-size: 0.78rem; font-weight: 600; white-space: nowrap;
}
.badge.admin { background: #6f42c1; }
.badge.collector { background: var(--accent); }

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -0.25rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 480px; }
th, td {
    padding: 0.6rem 0.65rem; text-align: left;
    border-bottom: 1px solid var(--border);
}
th { background: var(--bg); font-weight: 600; white-space: nowrap; }
td { word-break: break-word; }

.btn-primary, .btn-secondary, .btn-outline, .btn-sm {
    padding: 0.5rem 0.95rem; border-radius: 6px; border: none; cursor: pointer;
    font-size: 0.88rem; font-weight: 500; text-decoration: none;
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 40px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--accent); color: white; }
.btn-outline {
    background: transparent; border: 1px solid rgba(255,255,255,0.5); color: white;
}
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn-sm {
    padding: 0.3rem 0.65rem; background: var(--primary); color: white;
    font-size: 0.8rem; min-height: 32px;
}
.btn-block { width: 100%; padding: 0.75rem; min-height: 48px; }

select, input {
    padding: 0.5rem 0.7rem; border: 1px solid var(--border); border-radius: 6px;
    font-size: 0.9rem; font-family: inherit; max-width: 100%;
}
.header-actions select { min-width: 120px; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-weight: 500; font-size: 0.9rem; }
.form-group input { width: 100%; min-height: 44px; }

.error-msg {
    color: var(--danger); background: #f8d7da; padding: 0.6rem;
    border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem;
}

/* Login */
.login-page {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; min-height: 100dvh;
    background: linear-gradient(135deg, #1F4E79 0%, #2E86AB 100%);
    padding: 1rem;
}
.login-card {
    background: white; border-radius: 12px; padding: 1.75rem;
    width: 100%; max-width: 380px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
.login-header { text-align: center; margin-bottom: 1.35rem; }
.login-header h1 { color: var(--primary); font-size: 1.5rem; }
.login-header p { color: var(--muted); font-size: 0.9rem; }
.login-hint { text-align: center; color: var(--muted); font-size: 0.8rem; margin-top: 1rem; }

.detail-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}
.detail-item { background: var(--bg); padding: 0.5rem 0.7rem; border-radius: 6px; }
.detail-key {
    display: block; font-size: 0.72rem; color: var(--muted);
    text-transform: capitalize;
}
.detail-val { font-weight: 500; font-size: 0.9rem; word-break: break-word; }
.photo-row {
    display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1rem;
}
.photo-row img {
    max-width: 100%; width: 160px; height: auto;
    max-height: 140px; object-fit: cover;
    border-radius: 6px;
}

.modal {
    position: fixed; inset: 0; background: rgba(0,0,0,0.45);
    display: flex; align-items: flex-end; justify-content: center;
    z-index: 200; padding: 0;
}
.modal-content {
    background: white; border-radius: var(--radius) var(--radius) 0 0;
    padding: 1.35rem; width: 100%; max-width: 420px;
    max-height: 90vh; overflow-y: auto;
}
.modal-actions {
    display: flex; gap: 0.65rem; justify-content: flex-end;
    margin-top: 1rem; flex-wrap: wrap;
}
.modal-actions .btn-outline {
    color: var(--primary); border-color: var(--border); background: var(--bg);
}
.mb-3 { margin-bottom: 1.25rem; }
hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* ——— Mobile ——— */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 0; right: 0;
        width: min(280px, 85vw);
        height: 100vh;
        height: 100dvh;
        background: var(--primary-dark);
        flex-direction: column;
        align-items: stretch;
        padding: calc(var(--nav-h) + 0.75rem) 1.15rem 2rem;
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.25s ease;
        box-shadow: -4px 0 24px rgba(0,0,0,0.3);
        z-index: 101;
    }
    .nav-links.open { transform: translateX(0); }
    .nav-links a {
        padding: 0.9rem 0.4rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        font-size: 1rem;
    }
    .nav-links button {
        margin-top: 1rem;
        width: 100%;
        min-height: 44px;
    }

    .two-col { grid-template-columns: 1fr; }
    .detail-meta, .detail-grid { grid-template-columns: 1fr; }

    .page-header { flex-direction: column; align-items: flex-start; }
    .header-actions { width: 100%; }
    .header-actions .btn-primary,
    .header-actions .btn-secondary { flex: 1; min-width: 0; }
    .header-actions select { width: 100%; }

    .container { padding: 1rem 0.85rem; }
    .card { padding: 1rem; }

    .modal { align-items: flex-end; }
    .modal-content {
        max-width: 100%;
        border-radius: 16px 16px 0 0;
        padding: 1.25rem 1rem calc(1.25rem + env(safe-area-inset-bottom));
    }
    .modal-actions { flex-direction: column-reverse; }
    .modal-actions button { width: 100%; min-height: 44px; }

    .photo-row img { width: calc(50% - 0.4rem); max-width: none; }
}

@media (max-width: 400px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .nav-brand { font-size: 0.95rem; }
}

@media (min-width: 769px) {
    .modal { align-items: center; padding: 1rem; }
    .modal-content { border-radius: var(--radius); }
}