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

body {
    font-family: Arial, sans-serif;
    background: #1a1a2e;
    color: #e0e0e0;
    padding: 20px;
    line-height: 1.5;
}

.container { max-width: 1000px; margin: 0 auto; }

h1 {
    font-size: 2.5em;
    background: linear-gradient(45deg, #00d4ff, #ff6b9d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 30px;
}

.search {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#search {
    flex: 1;
    padding: 15px;
    background: #2a2a3e;
    border: 2px solid #00d4ff;
    border-radius: 10px;
    color: white;
    font-size: 16px;
}

#search::placeholder {
    color: #888;
}

#refresh {
    padding: 15px 25px;
    background: #00d4ff;
    color: #000;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 16px;
}

#refresh:hover {
    background: #00b8d4;
}

.portfolio {
    background: #2a2a3e;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-around;
    font-size: 1.3em;
    font-weight: bold;
}

.portfolio div {
    text-align: center;
}

#total { color: #00ff88; }
#change { color: #00ff88; }

h2 {
    margin: 30px 0 15px 0;
    color: #00d4ff;
    font-size: 1.5em;
}

.coin {
    background: #2a2a3e;
    padding: 20px;
    margin: 10px 0;
    border-radius: 10px;
    cursor: pointer;
    border-left: 4px solid #00d4ff;
    transition: all 0.3s ease;
}

.coin:hover {
    background: #36364a;
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.2);
}

.name { 
    font-size: 1.3em; 
    font-weight: bold; 
    margin-bottom: 5px; 
}

.symbol { 
    opacity: 0.8; 
    text-transform: uppercase; 
    margin-bottom: 10px; 
    font-size: 0.9em;
}

.price { 
    font-size: 1.4em; 
    font-weight: bold; 
    color: #00ff88; 
    margin-bottom: 5px;
}

.change {
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 5px;
    display: inline-block;
}

.change.up { 
    background: rgba(0, 255, 136, 0.2);
    color: #00ff88; 
}

.change.down { 
    background: rgba(255, 71, 87, 0.2);
    color: #ff4757; 
}

#error {
    background: #ff4757;
    color: white;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    margin: 20px 0;
    display: none;
    font-weight: bold;
}

.loading { 
    text-align: center; 
    padding: 40px; 
    font-size: 1.2em; 
    color: #00d4ff;
}

@media (max-width: 600px) {
    .search { 
        flex-direction: column; 
    }
    .portfolio { 
        flex-direction: column; 
        gap: 10px; 
        text-align: center; 
    }
    h1 { font-size: 2em; }
}