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

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(-45deg, #060a3a, #1b2735, #090a0f, #060a3a);
    background-size: 400% 400%;
    animation: gradientShift 12s ease infinite;
    overflow: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 50px 40px;
    width: 90%;
    max-width: 420px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    color: white;
}

.logo-area h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    margin-bottom: 5px;
}

.pulse-line {
    width: 60px;
    height: 3px;
    background: #3498db;
    margin: 0 auto 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px #3498db;
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0% { opacity: 0.4; width: 40px; }
    50% { opacity: 1; width: 80px; }
    100% { opacity: 0.4; width: 40px; }
}

p {
    color: #a0a0a0;
    margin-bottom: 35px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.mode-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 18px;
    border-radius: 15px;
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-left: 30px;
}

.mode-btn .emoji {
    font-size: 1.5rem;
    margin-right: 20px;
}

.mode-btn:hover {
    background: rgba(52, 152, 219, 0.2);
    border-color: #3498db;
    transform: scale(1.03);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.footer-note {
    margin-top: 30px;
    font-size: 0.7rem;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 1px;
}