:root {
    --green-dark: #1f4d2c;
    --green: #2e7d42;
    --green-light: #e8f3ea;
    --gold: #b8892b;
    --text: #2a2a2a;
    --muted: #6b6b6b;
    --border: #e0e0e0;
    --bg: #f7f8f5;
    --white: #ffffff;
    --radius: 10px;
    --shadow: 0 2px 10px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Sarabun', 'Kanit', 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
    background: linear-gradient(135deg, var(--green-dark), var(--green));
    color: #fff;
    padding: 28px 20px;
    box-shadow: var(--shadow);
}
.site-header .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
}
.site-header .logo-badge {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}
.site-header h1 { margin: 0; font-size: 1.5rem; font-weight: 700; }
.site-header p { margin: 2px 0 0; font-size: 0.9rem; opacity: 0.9; }
.site-header .admin-link {
    margin-left: auto;
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    white-space: nowrap;
}
.site-header .admin-link:hover { background: rgba(255,255,255,0.28); }

/* ---------- Container ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 24px 20px 60px; }

/* ---------- Search bar ---------- */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.search-bar input[type="text"] {
    flex: 1;
    min-width: 220px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
}
.search-bar input[type="text"]:focus { outline: none; border-color: var(--green); }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius);
    background: var(--green);
    color: #fff;
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    transition: background .15s;
}
.btn:hover { background: var(--green-dark); }
.btn.secondary { background: #888; }
.btn.secondary:hover { background: #666; }
.btn.danger { background: #c0392b; }
.btn.danger:hover { background: #962d21; }
.btn.small { padding: 6px 12px; font-size: 0.82rem; }

.result-count { color: var(--muted); font-size: 0.9rem; margin-bottom: 14px; }

/* ---------- Plant grid (frontend) ---------- */
.plant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 18px;
}
.plant-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: pointer;
    transition: transform .15s, box-shadow .15s;
    display: flex;
    flex-direction: column;
}
.plant-card:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(0,0,0,0.12); }
.plant-card .thumb {
    height: 160px;
    background: var(--green-light) center/cover no-repeat;
    display: flex; align-items: center; justify-content: center;
    color: var(--green);
    font-size: 2.4rem;
}
.plant-card .card-body { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; }
.plant-card .local-name { font-weight: 700; font-size: 1.05rem; margin: 0 0 4px; color: var(--green-dark); }
.plant-card .sci-name { font-style: italic; font-size: 0.85rem; color: var(--muted); margin: 0 0 8px; }
.plant-card .family-tag {
    display: inline-block;
    background: var(--green-light);
    color: var(--green-dark);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    margin-top: auto;
    align-self: flex-start;
}

/* ---------- Modal ---------- */
.modal-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 1000;
    align-items: center; justify-content: center;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-box {
    background: #fff;
    border-radius: 14px;
    max-width: 720px;
    width: 100%;
    max-height: 88vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal-box .modal-close {
    position: absolute; top: 12px; right: 14px;
    background: rgba(0,0,0,0.5);
    color: #fff;
    border: none;
    width: 32px; height: 32px;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    z-index: 2;
}
.modal-images { display: flex; gap: 6px; overflow-x: auto; padding: 6px; background: #111; }
.modal-images img { height: 220px; border-radius: 6px; object-fit: cover; flex-shrink: 0; }
.modal-images .no-image {
    width: 100%; height: 220px;
    display: flex; align-items: center; justify-content: center;
    color: #888; background: #222; font-size: 3rem;
}
.modal-content { padding: 22px 26px 28px; }
.modal-content h2 { margin: 0 0 4px; color: var(--green-dark); }
.modal-content .sci { font-style: italic; color: var(--muted); margin-bottom: 16px; }
.info-row { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.info-row:last-child { border-bottom: none; }
.info-row .label { flex: 0 0 130px; font-weight: 600; color: var(--green-dark); }
.info-row .value { flex: 1; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 30px; flex-wrap: wrap; }
.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: 6px;
    background: #fff;
    border: 1px solid var(--border);
    font-size: 0.9rem;
}
.pagination a:hover { background: var(--green-light); }
.pagination .current { background: var(--green); color: #fff; border-color: var(--green); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-state .icon { font-size: 3rem; margin-bottom: 10px; }

/* ---------- Admin layout ---------- */
.admin-body { background: #f0f2f0; min-height: 100vh; }
.admin-topbar {
    background: var(--green-dark);
    color: #fff;
    padding: 14px 24px;
    display: flex; align-items: center; gap: 16px;
}
.admin-topbar .brand { font-weight: 700; }
.admin-topbar nav { display: flex; gap: 14px; margin-left: 20px; }
.admin-topbar nav a { opacity: 0.85; font-size: 0.9rem; }
.admin-topbar nav a:hover { opacity: 1; text-decoration: underline; }
.admin-topbar .spacer { margin-left: auto; }
.admin-topbar .logout { font-size: 0.85rem; opacity: 0.85; }

.admin-container { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }
.admin-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}
.admin-card h2 { margin-top: 0; color: var(--green-dark); }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.data-table th { background: var(--green-light); color: var(--green-dark); font-weight: 600; }
.data-table tr:hover { background: #fafafa; }
.data-table img.thumb-sm { width: 48px; height: 48px; object-fit: cover; border-radius: 6px; }
.data-table .actions { display: flex; gap: 6px; white-space: nowrap; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; color: var(--green-dark); }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
}
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--green); }
.form-hint { font-size: 0.8rem; color: var(--muted); margin-top: 4px; }

.image-grid { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }
.image-grid .img-item { position: relative; width: 110px; }
.image-grid .img-item img { width: 110px; height: 110px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }
.image-grid .img-item .del-btn {
    position: absolute; top: -8px; right: -8px;
    background: #c0392b; color: #fff; border: none;
    width: 24px; height: 24px; border-radius: 50%; cursor: pointer;
    font-size: 0.8rem;
}
.image-grid .img-item .primary-badge {
    position: absolute; bottom: 4px; left: 4px;
    background: var(--gold); color: #fff;
    font-size: 0.65rem; padding: 2px 6px; border-radius: 10px;
}

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }
.alert.success { background: #e6f4ea; color: #1e6b32; border: 1px solid #b7e0c3; }
.alert.error { background: #fdecea; color: #a52418; border: 1px solid #f5c2bc; }

.login-wrap {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--green-dark), var(--green));
    padding: 20px;
}
.login-card {
    background: #fff;
    border-radius: 14px;
    padding: 36px 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-card h1 { margin: 0 0 6px; font-size: 1.3rem; color: var(--green-dark); text-align: center; }
.login-card p.sub { text-align: center; color: var(--muted); font-size: 0.85rem; margin-bottom: 24px; }
.login-card .btn { width: 100%; justify-content: center; margin-top: 6px; }

.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat-box { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; text-align: center; }
.stat-box .num { font-size: 1.8rem; font-weight: 700; color: var(--green); }
.stat-box .label { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }

footer.site-footer {
    text-align: center;
    padding: 24px;
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

@media (max-width: 640px) {
    .form-grid { grid-template-columns: 1fr; }
    .info-row { flex-direction: column; gap: 2px; }
    .info-row .label { flex: none; }
}