:root {
    --bg-color: #000000;
    --card-bg: rgba(28, 28, 30, 0.6);
    --input-bg: rgba(255, 255, 255, 0.1);
    --text-primary: #FFFFFF;
    --text-secondary: #86868b;
    --accent-silver: #D1D1D6;
    --accent-gradient: linear-gradient(135deg, #e0e0e0 0%, #a0a0a0 100%);
    --button-gradient: linear-gradient(180deg, #FFFFFF 0%, #D1D1D6 100%);
    --border-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Fullscreen Intro Section */
.intro-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-color);
    z-index: 1000;
    transition: opacity 0.5s ease-out;
}

.intro-fullscreen.fade-out {
    opacity: 0;
}

.intro-content {
    text-align: center;
    margin-bottom: 60px;
}

.typewriter-text {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    min-height: 3.5rem;
    letter-spacing: -0.5px;
}

.enter-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 36px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: #000;
    background: var(--button-gradient);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
}

.enter-button:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 255, 255, 0.2);
}

.enter-button svg {
    transition: transform 0.3s ease;
}

.enter-button:hover svg {
    transform: translateX(5px);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Cosmic/Silver Gradient Background */
.background-gradient {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, #2c2c2e 0%, #000000 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 20px;
    perspective: 1000px;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    opacity: 1;
    transition: var(--transition);
}

.hidden {
    display: none;
    opacity: 0;
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.small-header {
    margin-top: 30px;
    margin-bottom: 20px;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

.referrer-badge {
    text-align: center;
    margin-bottom: 20px;
}

.referrer-label {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-silver);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: 4px;
}

input {
    background: var(--input-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 16px;
    border-radius: 14px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

input:focus {
    border-color: var(--accent-silver);
    background: rgba(255, 255, 255, 0.15);
}

input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.cta-button, .download-button {
    background: var(--button-gradient);
    color: #000000;
    border: none;
    padding: 16px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 100%;
    margin-top: 10px;
    text-decoration: none;
}

.cta-button:hover, .download-button:hover {
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.cta-button:active, .download-button:active {
    transform: scale(0.98);
}

.divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 30px 0;
}

.referral-box {
    display: flex;
    gap: 10px;
}

.referral-box input {
    flex: 1;
    text-align: center;
    font-family: monospace;
    font-size: 0.9rem;
    cursor: text;
}

.icon-button {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: 14px;
    width: 52px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.icon-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.helper-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 15px;
}

/* Leaderboard Table Styles */
.leaderboard-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th {
    text-align: left;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

td {
    padding: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

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

.count {
    font-weight: 600;
    color: #FFFFFF;
}

.rank-1 { color: #FFD700; font-weight: bold; }
.rank-2 { color: #C0C0C0; font-weight: bold; }
.rank-3 { color: #CD7F32; font-weight: bold; }

/* Responsive adjustments */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .card {
        padding: 30px 20px;
    }
}