/* TT88 Vietnam - Vàng Vĩnh Cửu Style (Black/Gold Luxury) */
/* Inspired by debtfree.uk.net design */

:root {
    /* Color Variables */
    --primary-color: #dd3333;
    --secondary-color: #dd9933;
    --success-color: #81d742;
    --background-dark: #400000;
    --background-darker: #360000;
    --background-darkest: #590b09;
    --text-primary: #ffffff;
    --text-accent: #fbe43c;
    --text-green: #f0f028;
    --text-orange: #e77903;
    --border-color: #666666;

    /* Typography */
    --font-family: 'Arial', 'Helvetica', sans-serif;
    --font-size-base: 16px;
    --font-size-large: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;

    /* Border Radius */
    --border-radius: 10px;
    --border-radius-sm: 5px;

    /* Shadows */
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.2);
    --shadow-heavy: 0 8px 16px rgba(0,0,0,0.3);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--background-dark) 0%, var(--background-darker) 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Animations */
@keyframes totalseo_gradient {
    0% { background-position: 0 0; }
    100% { background-position: -200% 0; }
}

@keyframes totalseo_yellow_shadow {
    0% { box-shadow: 0 0 5px var(--text-accent); }
    50% { box-shadow: 0 0 20px var(--text-accent), 0 0 30px var(--text-accent); }
    100% { box-shadow: 0 0 5px var(--text-accent); }
}

@keyframes totalseo_cyan_shadow {
    0% { box-shadow: 0 0 5px var(--success-color); }
    50% { box-shadow: 0 0 20px var(--success-color), 0 0 30px var(--success-color); }
    100% { box-shadow: 0 0 5px var(--success-color); }
}

/* Header Styles */
.header-top {
    background: var(--background-darkest);
    padding: var(--spacing-xs) 0;
    text-align: center;
    font-size: 14px;
    color: var(--text-accent);
}

.header {
    background: var(--background-darker);
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid var(--primary-color);
}

.header-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: var(--spacing-xs);
}

.logo h1 {
    font-size: var(--font-size-xxl);
    font-weight: bold;
    color: var(--text-accent);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.logo img {
    max-height: 48px;
    width: auto;
    display: block;
    transition: transform 0.3s ease;
}

.logo a {
    display: inline-block;
    text-decoration: none;
}

.logo a:hover img {
    transform: scale(1.05);
}

/* Navigation */
.nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    align-items: center;
}

.nav a {
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav a:hover {
    color: var(--text-accent);
    background: rgba(251, 228, 60, 0.1);
    transform: translateY(-2px);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--background-darker);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm);
    color: var(--text-primary);
}

.dropdown-menu a:hover {
    background: var(--primary-color);
    color: white;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: repeating-linear-gradient(to right, #eeee22, #DD0000);
    background-size: 200% 100%;
    color: white;
    animation: 2s infinite totalseo_gradient;
}

.btn-primary:hover {
    transform: translateY(-3px);
    animation: totalseo_yellow_shadow 2s infinite;
}

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

.btn-secondary:hover {
    background: var(--text-orange);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-large);
}

.header-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* Compact header buttons */
.header .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 14px;
}


/* Content Blocks */
.content-block {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.content-block.horizontal .block-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.content-block.vertical .block-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
}

.block-headline {
    font-size: var(--font-size-xl);
    color: var(--text-accent);
    margin-bottom: var(--spacing-md);
    font-weight: bold;
}

.block-description p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.block-description ul {
    list-style: none;
    margin: var(--spacing-sm) 0;
}

.block-description li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-green);
}

.block-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.cta-section {
    margin-top: var(--spacing-lg);
}

.cta-section a:not(.btn) {
    color: var(--text-accent);
    text-decoration: underline;
}

.cta-section a:not(.btn):hover {
    color: var(--text-orange);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--background-dark) 0%, var(--background-darker) 50%, var(--background-darkest) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23fbe43c" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23dd3333" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

/* Content Grid */
.content-grid {
    padding: var(--spacing-xl) 0;
    background: var(--background-darker);
}

.grid-title {
    text-align: center;
    font-size: var(--font-size-xl);
    color: var(--text-accent);
    margin-bottom: var(--spacing-xl);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-item {
    background: #292929;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.grid-item:hover {
    transform: translateY(-5px);
    border-color: var(--text-accent);
    box-shadow: 0 10px 30px rgba(251, 228, 60, 0.2);
}

.grid-item .grid-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
}

.grid-item h3 {
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-large);
}

.grid-item .grid-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.grid-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.grid-cta a:not(.btn) {
    color: var(--text-accent);
    text-decoration: underline;
    font-size: 14px;
}

.grid-cta a:not(.btn):hover {
    color: var(--text-orange);
}

/* Responsible Gambling */
.responsible-gambling {
    background: var(--background-darkest);
    padding: var(--spacing-md) 0;
    text-align: center;
}


/* Byline/Disclosure box */
.byline { padding: var(--spacing-lg) 0 var(--spacing-sm); }
.byline-box { border: 1px dashed var(--border-color); background: rgba(255,255,255,0.03); padding: var(--spacing-sm); border-radius: var(--border-radius-sm); }
.byline-box p { margin: 4px 0; font-size: 14px; color: #ddd; }
.byline-box a { color: var(--text-accent); text-decoration: underline; }



/* Footer */
.footer {
    background: var(--background-darkest);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 2px solid var(--primary-color);
}

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

.footer-section h4 {
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-large);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-section p {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: #cccccc;
    font-size: 14px;
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-main {
        flex-direction: column;
        text-align: center;
    }

    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    .content-block.horizontal .block-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .header-buttons {
        width: 100%;
        justify-content: center;
    }

    .btn {
        flex: 1;
        max-width: 200px;
    }

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

    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: var(--font-size-xl);
    }

    .logo img {
        max-height: 40px;
    }

    .block-headline {
        font-size: var(--font-size-large);
    }

    .nav ul {
        gap: var(--spacing-sm);
    }

    .nav a {
        padding: var(--spacing-xs);
        font-size: 14px;
    }
}


/* Mobile hamburger toggle (refined) */
.mobile-menu-toggle { display: none; position: relative; width: 36px; height: 36px; background: transparent; border: none; padding: 0; }
.mobile-menu-toggle span { position: absolute; left: 8px; right: 8px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform 0.25s ease, opacity 0.25s ease; }
.mobile-menu-toggle span:nth-child(1){ top: 11px; }
.mobile-menu-toggle span:nth-child(2){ top: 17px; }
.mobile-menu-toggle span:nth-child(3){ top: 23px; }
.mobile-menu-toggle.active span:nth-child(1){ transform: translateY(6px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2){ opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3){ transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 768px) {
  /* Compact header */
  .header-top{ font-size: 12px; padding: 4px 0; }
  .header.has-mobile-toggle{ padding: 6px 0; }
  .header.has-mobile-toggle .header-main { flex-direction: row; align-items: center; gap: 8px; }
  .header.has-mobile-toggle .logo img { max-height: 36px; }
  .header.has-mobile-toggle .mobile-menu-toggle { display: inline-block; margin-left: auto; }
  .header.has-mobile-toggle .header-buttons { display: none; }

  /* Nav collapsible */
  .header.has-mobile-toggle .nav { display: none; width: 100%; margin-top: 6px; }
  .header.has-mobile-toggle .nav.nav-open { display: block; }
  .header.has-mobile-toggle .nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .header.has-mobile-toggle .nav a { text-align: left; display: block; padding: 10px 12px; }
}

/* Homepage hero: show image above text on mobile */
@media (max-width: 768px) {
  .hero-section .block-content { display: flex; flex-direction: column; }
  .hero-section .block-image { order: -1; }
}