#screen-start {
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1e1e24 0%, #000 100%);
    padding: 20px;
}

.login-box {
    background: rgba(25, 25, 30, 0.95);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid #333;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 20px rgba(255, 255, 255, 0.05);
    width: 100%;
    max-width: 420px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 24px;
    backdrop-filter: blur(10px);
}

.login-header {
    margin-bottom: 8px;
}

.login-header h1 {
    margin: 0;
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #fff 0%, #aaa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header .subtitle {
    margin-top: 8px;
    color: #888;
    font-size: 0.9rem;
    font-weight: 400;
}

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

.mode-selector {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.mode-selector label {
    font-size: 0.8rem;
    color: #aaa;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-left: 4px;
}

.mode-select {
    width: 100%;
    background: #111;
    border: 1px solid #444;
    color: #eee;
    padding: 12px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.mode-select:hover,
.mode-select:focus {
    border-color: #666;
    background: #15151a;
    outline: none;
}

#btn-enter-game {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 8px;
    margin-top: 8px;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#btn-enter-game:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}