:root {
    --bg: #0D0D0D;
    --card: #171717;
    --gold: #FFD700;
    --gold2: #D4AF37;
    --text: #FFFFFF;
    --text2: #AAAAAA;
    --green: #00D26A;
    --red: #FF4D4D;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    padding-bottom: 70px;
}

.header {
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--gold);
}

.username { font-size: 16px; font-weight: 600; }

.balance-card {
    margin: 12px 16px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(255,215,0,0.1), rgba(212,175,55,0.1));
    border: 1px solid rgba(255,215,0,0.2);
    border-radius: 16px;
    display: flex;
    justify-content: space-around;
}

.balance-main, .balance-earned { text-align: center; }
.label { display: block; font-size: 11px; color: var(--text2); margin-bottom: 4px; }
.value { font-size: 22px; font-weight: 700; color: var(--gold); }
.earned { color: var(--green); }

.quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 0 16px;
    margin-bottom: 16px;
}

.action-btn {
    background: var(--card);
    border: 1px solid rgba(255,215,0,0.1);
    color: var(--text);
    padding: 14px;
    border-radius: 12px;
    font-size: 13px;
    cursor: pointer;
    transition: 0.3s;
}

.action-btn:active {
    border-color: var(--gold);
    box-shadow: 0 0 15px rgba(255,215,0,0.2);
}

#content { padding: 0 16px; }

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    background: var(--card);
    border-top: 1px solid rgba(255,215,0,0.1);
    display: flex;
    justify-content: space-around;
    padding: 8px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text2);
    padding: 8px;
    font-size: 11px;
    cursor: pointer;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: 18px;
}

.nav-btn.active { color: var(--gold); background: rgba(255,215,0,0.1); }

.card {
    background: var(--card);
    border: 1px solid rgba(255,215,0,0.1);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 12px;
}

.card-title { font-size: 18px; font-weight: 700; color: var(--gold); margin-bottom: 12px; }

.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 8px;
    transition: 0.3s;
}

.btn-gold {
    background: linear-gradient(135deg, var(--gold), var(--gold2));
    color: #000;
}

.btn-outline {
    background: rgba(255,215,0,0.1);
    color: var(--gold);
    border: 1px solid rgba(255,215,0,0.2);
}

.miner-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }

.miner-item {
    background: var(--card);
    border: 1px solid rgba(255,215,0,0.1);
    border-radius: 14px;
    padding: 14px;
    text-align: center;
}

.miner-icon { font-size: 32px; margin-bottom: 8px; }
.miner-name { font-weight: 600; margin-bottom: 4px; }
.miner-price { color: var(--gold); font-weight: 700; }
.miner-profit { color: var(--green); font-size: 12px; }

.loading { text-align: center; padding: 40px; color: var(--text2); }