@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
    /* Palette */
    --bg-primary: #f5f1e8;
    --bg-secondary: #ebe4d6;
    --surface: #ffffff;
    --accent-primary: #1f3a2d; /* Dark Green */
    --accent-secondary: #7a5c3e; /* Wood Brown */
    --accent-tertiary: #2f5d8a; /* Slate Blue */
    --accent-dark: #111827;
    --border: #ddd2c3;
    --text-primary: #1f2933;
    --text-secondary: #5f6b76;
    --text-light: #ffffff;

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Layout */
    --max-width: 1360px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 96px;

    /* Shadows & Radii */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 2px 4px rgba(17, 24, 39, 0.05);
    --shadow-md: 0 4px 12px rgba(17, 24, 39, 0.08);
    --shadow-lg: 0 12px 24px rgba(17, 24, 39, 0.12);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--accent-dark);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--spacing-md); color: var(--text-secondary); }

.text-center { text-align: center; }
.text-primary { color: var(--accent-primary); }
.text-secondary { color: var(--accent-secondary); }
.lead { font-size: 1.25rem; color: var(--text-secondary); }

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-bg-alt {
    background-color: var(--bg-secondary);
}

.section-bg-dark {
    background-color: var(--accent-dark);
    color: var(--text-light);
}

.section-bg-dark h2, .section-bg-dark h3, .section-bg-dark p {
    color: var(--text-light);
}

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Header & Nav */
.header {
    background-color: rgba(245, 241, 232, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    width: 24px;
    height: 24px;
    fill: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-primary);
    transition: var(--transition);
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--accent-dark);
    position: relative;
    transition: var(--transition);
}

.hamburger::before, .hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--accent-dark);
    left: 0;
    transition: var(--transition);
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    font-family: var(--font-body);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--text-light);
}

.btn-primary:hover {
    background-color: #14271f;
    box-shadow: var(--shadow-md);
    color: var(--text-light);
}

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

.btn-secondary:hover {
    background-color: var(--accent-primary);
    color: var(--text-light);
}

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

.btn-accent:hover {
    background-color: #634a31;
}

/* Hero Sections */
.hero {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Subtle Chess Pattern Background */
.chess-pattern {
    background-image: 
        repeating-linear-gradient(45deg, rgba(31, 58, 45, 0.03) 25%, transparent 25%, transparent 75%, rgba(31, 58, 45, 0.03) 75%, rgba(31, 58, 45, 0.03)), 
        repeating-linear-gradient(45deg, rgba(31, 58, 45, 0.03) 25%, transparent 25%, transparent 75%, rgba(31, 58, 45, 0.03) 75%, rgba(31, 58, 45, 0.03));
    background-position: 0 0, 40px 40px;
    background-size: 80px 80px;
}

.page-header {
    padding: 140px 0 60px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    text-align: center;
}

/* Cards */
.card {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.card-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 12px;
    margin-bottom: var(--spacing-sm);
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-body {
    flex-grow: 1;
}

.card-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-blitz { background-color: #ffe8d6; color: #a55a1d; }
.badge-rapid { background-color: #d6e8ff; color: #1d5aa5; }
.badge-bullet { background-color: #ffd6d6; color: #a51d1d; }
.badge-classical { background-color: #e8ffd6; color: #3a7a1a; }
.badge-arena { background-color: #e8d6ff; color: #6a1da5; }

/* Tables (Rankings/Standings) */
.table-container {
    overflow-x: auto;
    background-color: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 16px var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background-color: var(--bg-primary);
}

tbody tr:last-child td {
    border-bottom: none;
}

.rank-col {
    font-weight: 700;
    color: var(--accent-primary);
    width: 80px;
}

.rating-col {
    font-weight: 600;
    color: var(--accent-secondary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--surface);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(31, 58, 45, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* Feature Block */
.feature-block {
    text-align: center;
    padding: var(--spacing-md);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

/* Guide Content */
.content-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.sidebar-nav {
    position: sticky;
    top: 100px;
    background-color: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.sidebar-nav ul li {
    margin-bottom: 12px;
}

.sidebar-nav a {
    color: var(--text-secondary);
    font-weight: 500;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    color: var(--accent-primary);
}

.prose h2 { margin-top: var(--spacing-lg); border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.prose h3 { margin-top: var(--spacing-md); }
.prose ul, .prose ol { margin-bottom: var(--spacing-md); padding-left: var(--spacing-md); }
.prose li { margin-bottom: 8px; color: var(--text-secondary); }

/* Tournament Detail Specifics */
.detail-header {
    background-color: var(--accent-dark);
    color: var(--text-light);
    padding: 120px 0 60px;
}

.detail-header h1 { color: var(--text-light); }
.detail-header .text-secondary { color: #aeb9c4; }

.detail-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    margin-top: -40px;
}

.detail-main {
    background-color: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.detail-sidebar .card {
    position: sticky;
    top: 100px;
}

.info-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-md) 0;
}

.info-list li {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.info-list li:last-child {
    border-bottom: none;
}

.info-label { font-weight: 600; color: var(--text-primary); }

/* Footer */
.footer {
    background-color: var(--accent-dark);
    color: var(--text-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer h4 {
    color: var(--text-light);
    font-family: var(--font-body);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links li { margin-bottom: 12px; }
.footer-links a { color: #aeb9c4; }
.footer-links a:hover { color: var(--text-light); }

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #aeb9c4;
    font-size: 0.9rem;
}

.footer-legal-links {
    display: flex;
    gap: var(--spacing-sm);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Media Queries */
@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .detail-layout { grid-template-columns: 1fr; margin-top: var(--spacing-md); }
    .detail-sidebar .card { position: static; }
}

@media (max-width: 992px) {
    .content-layout { grid-template-columns: 1fr; }
    .sidebar-nav { position: static; margin-bottom: var(--spacing-md); }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 64px;
        --spacing-lg: 32px;
    }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav-links, .header .btn { display: none; }
    .mobile-menu-btn { display: block; }
    
    .header.menu-open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--surface);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border);
    }
    
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
    .footer-bottom { flex-direction: column; gap: var(--spacing-sm); text-align: center; }
    .hero-actions { flex-direction: column; }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 40px;
        --spacing-lg: 24px;
    }
    h1 { font-size: 2rem; }
    .card-header { flex-direction: column; gap: 8px; }
}