/*
Theme Name: SEO Theme - Link Vào VN88
Theme URI: https://vn88.co.com/
Author: VN88 SEO Team
Author URI: https://vn88.co.com/
Description: Theme chuyên biệt cho từ khóa 'link vào vn88' với cấu trúc SEO tối ưu, mô phỏng theo vn88.co.com
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: seo-theme-link-vao-vn88
Tags: casino, gaming, betting, seo, responsive, vietnamese
*/

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #c9a227;
    --secondary-color: #1a1a1a;
    --accent-color: #ff6b00;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
    --border-color: #e0e0e0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.site-header {
    background: var(--secondary-color);
    padding: 15px 0;
    position: relative;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.site-header.sticky {
    position: sticky;
    top: 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
}

.site-logo img {
    height: 50px;
    width: auto;
}

.nav-desktop {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-desktop li {
    position: relative;
}

.nav-desktop a {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    padding: 10px 15px;
    transition: color 0.3s ease;
    text-transform: uppercase;
    font-size: 14px;
}

.nav-desktop a:hover,
.nav-desktop .current-menu-item a {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 10px;
    z-index: 10000;
}

.menu-toggle.active {
    z-index: 10001;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Header Buttons */
.header-buttons {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-login,
.btn-register {
    padding: 10px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-login {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-login:hover {
    background: var(--white);
    color: var(--secondary-color);
}

.btn-register {
    background: var(--primary-color);
    color: var(--secondary-color);
    border: 2px solid var(--primary-color);
}

.btn-register:hover {
    background: #b8941f;
    border-color: #b8941f;
}

/* Mobile Navigation */
.nav-mobile {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--secondary-color);
    padding: 20px;
    z-index: 9999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    border-top: 1px solid rgba(255,255,255,0.1);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
}

.nav-mobile.active {
    display: block;
}

.nav-mobile-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-mobile-list li {
    margin-bottom: 15px;
}

.nav-mobile-list a {
    color: var(--white);
    text-decoration: none;
    font-size: 16px;
    padding: 12px;
    display: block;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.nav-mobile-list a:hover {
    background: rgba(201, 162, 39, 0.1);
}

.nav-mobile ul {
    list-style: none;
}

.nav-mobile li {
    margin-bottom: 15px;
}

.nav-mobile a {
    color: var(--white);
    text-decoration: none;
    font-size: 16px;
    padding: 12px;
    display: block;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.nav-mobile a:hover {
    background: rgba(201, 162, 39, 0.1);
}

.mobile-header-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.btn-login-mobile,
.btn-register-mobile {
    flex: 1;
    padding: 12px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    text-align: center;
    font-size: 14px;
}

.btn-login-mobile {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-register-mobile {
    background: var(--primary-color);
    color: var(--secondary-color);
    border: 2px solid var(--primary-color);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2a2a2a 100%);
    padding: 80px 0;
    text-align: center;
    color: var(--white);
}

.hero-section h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero-section p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 30px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 15px 40px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    background: #b8941f;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--accent-color);
    color: var(--white);
}

.btn-secondary:hover {
    background: #e55f00;
    transform: translateY(-2px);
}

/* Content Sections */
.content-section {
    padding: 60px 0;
    background: var(--white);
}

.content-section:nth-child(even) {
    background: var(--light-bg);
}

.section-title {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 30px;
    text-align: center;
}

.section-content {
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-content h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin: 40px 0 20px;
}

.section-content h3 {
    font-size: 22px;
    color: var(--secondary-color);
    margin: 30px 0 15px;
}

.section-content p {
    margin-bottom: 20px;
    text-align: justify;
}

.section-content ul {
    margin: 20px 0;
    padding-left: 30px;
}

.section-content li {
    margin-bottom: 10px;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border: 2px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 20px;
}

/* Footer */
.site-footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-section p,
.footer-section a {
    color: #ccc;
    line-height: 1.8;
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }

    .header-buttons {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-section h1 {
        font-size: 32px;
    }

    .hero-section p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .section-title {
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .header-container {
        padding: 0 15px;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 40px 0;
    }

    .hero-section h1 {
        font-size: 26px;
    }

    .content-section {
        padding: 30px 0;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.highlight {
    color: var(--primary-color);
    font-weight: bold;
}