/* --- 1. Root Variables --- */
:root {
    --primary-blue: #007bff;
    --primary-dark: #2c3e50;
    --bg-light: #f0f2f5;
    --text-main: #333;
    --white: #ffffff;
    --shadow: 0 4px 15px rgba(0,0,0,0.05);
}

/* --- 2. Global Reset --- */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-light);
}

/* --- 3. Header & Navigation --- */
header { background: var(--primary-dark); color: var(--white); padding: 15px 0; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.nav-flex { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.logo { font-size: 1.5rem; font-weight: bold; }
.nav-links { display: flex; list-style: none; gap: 25px; }
.nav-links a { color: white; text-decoration: none; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--primary-blue); }

/* --- 4. Page Structure --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.page-wrapper { display: flex; max-width: 1200px; margin: 20px auto; gap: 20px; padding: 0 20px; align-items: flex-start; }
.main-content { flex: 3; }

/* --- 5. Sidebar Styling --- */
.sidebar { 
    flex: 1; 
    min-width: 260px; 
    display: flex; 
    flex-direction: column; 
    gap: 20px;
}

@media (min-width: 1025px) {
    .sidebar { position: sticky; top: 20px; height: fit-content; }
}

.sidebar-card {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid #eef2f7;
    margin-bottom: 20px;
}

.sidebar-card h3 { 
    font-size: 1.1rem; 
    margin-bottom: 15px; 
    padding-bottom: 10px; 
    border-bottom: 2px solid var(--primary-blue); 
    color: var(--primary-dark);
}

/* Category Links */
.cat-link {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
    text-decoration: none;
    color: #555;
    transition: all 0.3s;
}

.cat-link:last-child { border-bottom: none; }
.cat-link:hover { color: var(--primary-blue); padding-left: 10px; }

/* Sidebar Navigation */
.sidebar-nav { list-style: none; }
.sidebar-nav li { margin-bottom: 8px; }
.sidebar-nav a { 
    display: flex; align-items: center; gap: 10px; text-decoration: none; 
    color: #555; padding: 12px; border-radius: 8px; transition: 0.3s; 
}
.sidebar-nav a:hover, .sidebar-nav a.active { background: #f0f7ff; color: var(--primary-blue); }
.btn-highlight { background: var(--primary-blue) !important; color: var(--white) !important; font-weight: 600; }

/* --- 6. Hero & Sections --- */
.hero { background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('../images/hero-bg.jpg'); background-size: cover; padding: 80px 20px; text-align: center; color: white; }
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 30px; }
.category-card { padding: 20px; border: 1px solid #ddd; border-radius: 8px; text-align: center; background: #fff; transition: 0.3s; }
.category-card:hover { box-shadow: var(--shadow); }

/* --- 7. Admin Table & Auth --- */
.table-container { margin: 20px 0; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; }
.admin-table thead { background-color: var(--primary-dark); color: #fff; }
.admin-table th, .admin-table td { padding: 15px; text-align: left; border-bottom: 1px solid #e0e0e0; }

.auth-card {
    background: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border: 1px solid #eef2f7;
    max-width: 500px;
    margin: 0 auto;
}

.auth-header { margin-bottom: 25px; font-weight: 700; color: var(--primary-dark); text-align: center; }
.custom-input { width: 100%; padding: 12px 15px; margin-bottom: 15px; border: 1px solid #ddd; border-radius: 8px; transition: 0.3s; }
.custom-input:focus { border-color: var(--primary-blue); outline: none; box-shadow: 0 0 5px rgba(0,123,255,0.2); }
.btn-pro { width: 100%; padding: 12px; background: var(--primary-blue); color: white; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; transition: 0.3s; }
.btn-pro:hover { background: #0056b3; }

/* --- 8. Footer --- */
.site-footer { background: #222; color: #fff; padding: 40px 20px; margin-top: 50px; }
.footer-container { max-width: 1200px; margin: auto; display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.footer-col { flex: 1; min-width: 250px; }
.footer-col h3 { margin-bottom: 15px; color: #007bff; font-size: 1.1rem; }
.footer-col a { display: block; color: #ccc; text-decoration: none; margin-bottom: 8px; transition: 0.3s; }
.footer-col a:hover { color: #fff; padding-left: 5px; }
.footer-copyright { text-align: center; border-top: 1px solid #444; margin-top: 30px; padding-top: 20px; color: #777; font-size: 0.85rem; }

/* --- 9. Responsive Adjustments --- */
@media (max-width: 992px) { 
    .page-wrapper { flex-direction: column; } 
    .sidebar { display: none; }
}
@media (max-width: 768px) {
    .footer-container { gap: 20px; text-align: center; }
    .footer-col { min-width: 100%; }
}