:root {
    --zend2-blue: #1a6dff;
    --zend2-blue-dark: #0f4fcc;
    --bg: #f4f6fa;
    --surface: #ffffff;
    --text: #1c2434;
    --muted: #667085;
    --border: #e4e7ec;
    --danger: #c62828;
    --success: #1b7f4e;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
    --radius: 12px;
    --font: "Source Sans 3", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background: linear-gradient(180deg, #eef3fb 0%, var(--bg) 240px);
    min-height: 100vh;
}
a { color: var(--zend2-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.admin-shell {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
}
.admin-sidebar {
    background: #0f1b33;
    color: #fff;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.brand { display: flex; gap: 0.75rem; align-items: center; }
.brand-mark {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--zend2-blue); display: grid; place-items: center;
    font-weight: 700;
}
.brand strong { display: block; font-size: 1.05rem; }
.brand small { color: #9aa7c2; }
.admin-sidebar nav { display: flex; flex-direction: column; gap: 0.35rem; flex: 1; }
.admin-sidebar nav a {
    color: #d7deed; padding: 0.7rem 0.85rem; border-radius: 8px; text-decoration: none;
}
.admin-sidebar nav a.active,
.admin-sidebar nav a:hover { background: rgba(26, 109, 255, 0.18); color: #fff; text-decoration: none; }
.logout-form button {
    width: 100%; background: transparent; border: 1px solid #334155; color: #d7deed;
    border-radius: 8px; padding: 0.65rem; cursor: pointer; font: inherit;
}
.logout-form button:hover { border-color: var(--zend2-blue); }

.admin-main { padding: 1.5rem 1.75rem 2.5rem; }
.admin-top {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.25rem; gap: 1rem;
}
.admin-top h1 { margin: 0; font-size: 1.6rem; font-weight: 700; }
.admin-user { color: var(--muted); }

.flash {
    background: #e8f5ee; color: var(--success); border: 1px solid #b7e0c8;
    padding: 0.85rem 1rem; border-radius: 10px; margin-bottom: 1rem;
}
.flash-error { background: #fdecec; color: var(--danger); border-color: #f3c1c1; }
.flash ul { margin: 0; padding-left: 1.1rem; }

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1rem 1.1rem; box-shadow: var(--shadow);
}
.stat-card span { display: block; color: var(--muted); font-size: 0.92rem; }
.stat-card strong { font-size: 1.7rem; color: var(--zend2-blue-dark); }

.panel {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 1.1rem;
    margin-bottom: 1.25rem;
}
.panel h2 { margin: 0 0 1rem; font-size: 1.15rem; }

.toolbar {
    display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1rem; align-items: end;
}
.toolbar label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.85rem; color: var(--muted); }
.toolbar input, .toolbar select, .form-control {
    border: 1px solid var(--border); border-radius: 8px; padding: 0.55rem 0.7rem;
    font: inherit; min-width: 160px; background: #fff; color: var(--text);
}
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    border: none; border-radius: 8px; padding: 0.6rem 1rem; font: inherit; font-weight: 600;
    cursor: pointer; background: var(--zend2-blue); color: #fff; text-decoration: none;
}
.btn:hover { background: var(--zend2-blue-dark); text-decoration: none; }
.btn-secondary { background: #eef2f7; color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 0.4rem 0.7rem; font-size: 0.9rem; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.75rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
.user-cell { display: flex; gap: 0.7rem; align-items: center; }
.avatar {
    width: 36px; height: 36px; border-radius: 50%; background: #dbe7ff; color: var(--zend2-blue-dark);
    display: grid; place-items: center; font-weight: 700; overflow: hidden; flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.badge {
    display: inline-block; border-radius: 999px; padding: 0.15rem 0.55rem; font-size: 0.78rem; font-weight: 600;
    background: #eef2f7; color: var(--muted);
}
.badge-plus { background: #e7f0ff; color: var(--zend2-blue-dark); }
.badge-active { background: #e8f5ee; color: var(--success); }
.badge-suspended { background: #fdecec; color: var(--danger); }

.empty {
    text-align: center; padding: 2.5rem 1rem; color: var(--muted);
}

.login-page {
    min-height: 100vh; display: grid; place-items: center; padding: 1.5rem;
    background:
        radial-gradient(circle at top right, rgba(26,109,255,0.18), transparent 40%),
        linear-gradient(180deg, #eef3fb, #f7f8fb);
}
.login-card {
    width: min(420px, 100%); background: #fff; border: 1px solid var(--border);
    border-radius: 16px; padding: 2rem; box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 0.35rem; }
.login-card p { margin: 0 0 1.5rem; color: var(--muted); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.35rem; font-weight: 600; }
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"] {
    width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 0.7rem 0.8rem; font: inherit;
}
.actions-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1rem; }
.meta-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.85rem;
}
.meta-item { background: #f8fafc; border-radius: 10px; padding: 0.85rem; }
.meta-item span { display: block; color: var(--muted); font-size: 0.85rem; }
.confirm-box {
    margin-top: 0.75rem; padding: 0.85rem; border: 1px dashed var(--border); border-radius: 10px; background: #fafbfc;
}
.pagination { margin-top: 1rem; }

@media (max-width: 900px) {
    .admin-shell { grid-template-columns: 1fr; }
    .admin-sidebar { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 1rem; }
    .admin-sidebar nav { flex-direction: row; flex-wrap: wrap; width: 100%; }
    .logout-form { margin-left: auto; }
}