/* 
    Publisher & Modern Aesthetics CSS 
    Overrides Bootstrap 3 default styles
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #2563eb;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
}

body {
    font-family: 'Inter', sans-serif !important;
    background-color: var(--bg-color);
    color: var(--text-main);
}

/* Modern Navbar - Glassmorphism */
.navbar-default {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: none !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar-default .navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 22px;
}
.navbar-default .navbar-nav>li>a {
    font-weight: 500;
    color: var(--text-main) !important;
    transition: color 0.2s;
}
.navbar-default .navbar-nav>li>a:hover {
    color: var(--primary-color) !important;
}
.navbar-default .navbar-nav>.active>a, 
.navbar-default .navbar-nav>.active>a:focus, 
.navbar-default .navbar-nav>.active>a:hover {
    background-color: transparent !important;
    color: var(--primary-color) !important;
    font-weight: 600;
}

/* 2-Column Publisher Layout Foundation */
.publisher-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}
.publisher-main {
    flex: 1 1 0%;
    min-width: 0;
}
.publisher-sidebar {
    width: 300px;
    flex-shrink: 0;
}
@media (max-width: 991px) {
    .publisher-sidebar {
        width: 100%;
        margin-top: 20px;
    }
}

/* Sticky Sidebar */
.sticky-sidebar-container {
    position: sticky;
    top: 20px;
}

/* Cards Design for Quizzes & Content */
.modern-card {
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    padding: 24px;
    margin-bottom: 24px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.modern-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Beautiful Buttons */
.btn {
    border-radius: 8px;
    font-weight: 600;
    padding: 10px 20px;
    transition: all 0.2s ease-in-out;
    border: none;
}
.btn-primary, .btn-info {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.4);
    color: white !important;
}
.btn-primary:hover, .btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px -2px rgba(37, 99, 235, 0.5);
    background: linear-gradient(135deg, #1d4ed8 0%, #1e3a8a 100%);
}
.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.4);
}
.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px -2px rgba(16, 185, 129, 0.5);
}

/* --- AD ZONES (Chuẩn Publisher) --- */
.ad-zone {
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    text-align: center;
    position: relative;
}

/* Wing Ads (2 bên sườn) */
.ad-wing {
    position: fixed;
    top: 90px;
    width: 160px;
    max-width: 100%;
    height: 600px;
    overflow: hidden;
    z-index: 100;
}
.ad-wing-left {
    left: 20px;
}
.ad-wing-right {
    right: 20px;
}
@media (max-width: 1399px) {
    .ad-wing {
        display: none !important;
    }
}

/* Kích thước Ads chuẩn */
.ad-leaderboard {
    width: 100%;
    max-width: 728px;
    height: 90px;
    margin: 20px auto;
}
.ad-rectangle {
    width: 300px;
    height: 250px;
    margin: 0 auto 20px auto;
}
.ad-skyscraper {
    width: 300px;
    height: 600px;
    margin: 0 auto 20px auto;
}
.ad-in-article {
    width: 100%;
    height: 150px;
    margin: 20px 0;
}