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

:root {
    color-scheme: dark;
    font-family: 'Inter', sans-serif;
    background: #080a12;
    color: #e6eef7;
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at top left, rgba(79, 195, 247, 0.14), transparent 25%),
                radial-gradient(circle at bottom right, rgba(129, 199, 132, 0.12), transparent 22%),
                linear-gradient(180deg, #07090f 0%, #0d1220 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.08), transparent 40%, rgba(129, 199, 132, 0.08));
    pointer-events: none;
}

.page-shell {
    width: min(100%, 440px);
    padding: 24px;
    position: relative;
    z-index: 1;
}

.login-card {
    background: rgba(12, 15, 26, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 30px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(79, 195, 247, 0.06);
    backdrop-filter: blur(20px);
    padding: 40px 32px;
    animation: appear 0.9s ease forwards;
}

.brand-block {
    display: inline-flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 24px;
}

.brand-label {
    font-size: 2rem;
    font-family: 'Poppins', sans-serif;
    letter-spacing: -0.06em;
    background: linear-gradient(135deg, #4fc3f7, #81c784);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-tag {
    font-size: 1rem;
    color: #a2cfe0;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.login-card h1 {
    font-size: clamp(2rem, 2.5vw, 2.4rem);
    margin-bottom: 12px;
    color: #f8fbff;
}

.lead {
    color: #a7b6ca;
    margin-bottom: 28px;
    line-height: 1.8;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: #9cc8e7;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.form-group input {
    width: 100%;
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(14, 17, 30, 0.95);
    color: #eef6ff;
    font-size: 1rem;
    box-shadow: inset 0 0 20px rgba(79, 195, 247, 0.06);
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: rgba(79, 195, 247, 0.8);
    transform: translateY(-1px);
}

.login-btn {
    width: 100%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 16px 20px;
    margin-top: 8px;
    border: none;
    border-radius: 18px;
    background: linear-gradient(135deg, #4fc3f7, #81c784);
    color: #08101d;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    box-shadow: 0 18px 35px rgba(79, 195, 247, 0.18);
    transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 24px 48px rgba(79, 195, 247, 0.24);
    filter: saturate(1.05);
}

.login-btn:active {
    transform: translateY(0);
}

.guest-link {
    display: block;
    margin-top: 16px;
    color: #9cc8e7;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: color 0.25s ease, transform 0.25s ease;
}

.guest-link:hover {
    color: #81c784;
    transform: translateY(-1px);
}

.disclaimer {
    margin-top: 24px;
    color: #8ea8c1;
    font-size: 0.92rem;
    line-height: 1.7;
    opacity: 0.85;
}

@keyframes appear {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 520px) {
    .login-card {
        padding: 28px 22px;
    }

    .brand-label {
        font-size: 1.75rem;
    }
}