:root {
    --bg: #f8fafc;
    --sidebar-bg: #0f172a;
    --sidebar-text: #e2e8f0;
    --card-bg: #ffffff;
    --text-main: #334155;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --border: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text-main);
}

.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.sidebar-header span {
    color: var(--primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 20px 0;
}

.sidebar-nav a {
    padding: 15px 25px;
    color: var(--sidebar-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: background 0.2s;
    font-weight: 500;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    border-left: 4px solid var(--primary);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    background-color: var(--card-bg);
    padding: 20px 30px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.topbar h1 {
    font-size: 22px;
    font-weight: 600;
}

.dashboard-content {
    padding: 30px;
    max-width: 1200px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    gap: 20px;
    border: 1px solid var(--border);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 5px;
}

.stat-info p {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-main);
}

.settings-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
}

.settings-card h2 {
    font-size: 18px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-group input:focus {
    border-color: var(--primary);
}

.btn-save {
    background-color: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.2s;
}

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

.status-message {
    margin-top: 15px;
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    display: none;
}

.status-success {
    display: block;
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.status-error {
    display: block;
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

@media (max-width: 768px) {
    .admin-layout { flex-direction: column; }
    .sidebar { width: 100%; }
    .sidebar-nav { flex-direction: row; padding: 0; overflow-x: auto; }
    .sidebar-nav a { border-left: none; border-bottom: 4px solid transparent; white-space: nowrap; }
    .sidebar-nav a:hover, .sidebar-nav a.active { border-left: none; border-bottom: 4px solid var(--primary); }
}

/* Login Page Styles */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg);
    padding: 20px;
}
.login-box {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 400px;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
}
.login-header {
    text-align: center;
    margin-bottom: 30px;
}
.login-header h2 {
    font-size: 24px;
    font-weight: 700;
}
.login-header span {
    color: var(--primary);
}
.login-header p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 5px;
}