:root {
    --bg-top: #E6F2FF;
    --bg-bottom: #89C4F4;
    --primary: #C7A065;
    --primary-hover: #b08d55;
    --text-main: #1C3757;
    --text-muted: rgba(28, 55, 87, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.3);
    --glass-border: rgba(255, 255, 255, 0.6);
    --card-shadow: 0 4px 15px rgba(28, 55, 87, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    padding: 2rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 600;
    font-size: 0.95rem;
    opacity: 0.7;
    transition: opacity 0.2s;
}

nav a:hover {
    opacity: 1;
}

/* Hero Section */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

h1 span {
    display: block;
    color: var(--primary);
    background: none;
    -webkit-text-fill-color: initial;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 3rem;
    font-weight: 500;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    border-radius: 99px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: var(--text-main);
    color: white;
}

.btn-primary:hover {
    background: #2a5280;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(28, 55, 87, 0.2);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid white;
    color: var(--text-main);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

/* Features */
.features {
    padding: 6rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
    font-weight: 800;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
}

/* Content Pages */
.content-page {
    padding: 4rem 0;
    max-width: 800px;
}

.content-page h1 {
    font-size: 2.5rem;
    text-align: left;
    margin-bottom: 2rem;
    color: var(--text-main);
}

.content-page h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.content-page p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.content-page ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--text-muted);
}

.content-page li {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--text-main);
    text-decoration: none;
    margin: 0 1rem;
    opacity: 0.8;
}

footer a:hover {
    opacity: 1;
}

/* Leaderboard */
.leaderboard-section {
    padding: 4rem 0;
    text-align: center;
}

.leaderboard-table {
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    background: var(--glass-bg);
    border-radius: 1.5rem;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border-collapse: separate;
    border-spacing: 0;
}

.leaderboard-table th {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-main);
    font-weight: 800;
    padding: 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.leaderboard-table td {
    padding: 1.25rem 1.5rem;
    text-align: left;
    color: var(--text-main);
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.leaderboard-table tr:last-child td {
    border-bottom: none;
}

.rank-badge {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(28, 55, 87, 0.1);
    color: var(--text-main);
    font-weight: 800;
    font-size: 0.9rem;
}

.rank-1 .rank-badge {
    background: #FFD700;
    color: #FFF;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.rank-2 .rank-badge {
    background: #C0C0C0;
    color: #FFF;
}

.rank-3 .rank-badge {
    background: #CD7F32;
    color: #FFF;
}