* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.container {
    width: 90%;
    max-width: 600px;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #00ff88;
    font-size: 2.5em;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

p {
    margin: 15px 0;
    line-height: 1.6;
}

.enigma-box {
    margin-top: 30px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

.riddle {
    font-size: 1.2em;
    font-weight: bold;
    color: #00ff88;
    text-align: center;
}

input {
    width: 100%;
    padding: 12px;
    margin: 15px 0;
    border: none;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 1em;
}

input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background: #00ff88;
    color: #1a1a2e;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: #00cc6a;
    transform: translateY(-2px);
}

.hidden {
    display: none;
}

#dica {
    color: #ff9100;
    font-style: italic;
    text-align: center;
    margin-top: 15px;
}