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

body {
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background:
        linear-gradient(rgba(5, 10, 20, 0.35), rgba(5, 10, 20, 0.65)),
        url('/assets/img/background.jpg') center/cover no-repeat;
    color: #ffffff;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-box {
    width: 100%;
    max-width: 430px;
    padding: 46px 42px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.login-header {
    text-align: center;
    margin-bottom: 38px;
}

.login-header h1 {
    font-size: 36px;
    letter-spacing: 5px;
    font-weight: 700;
}

.login-header p {
    margin-top: 12px;
    font-size: 13px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.78);
}

.input-group {
    position: relative;
    margin-bottom: 34px;
}

.input-group span {
    position: absolute;
    left: 0;
    top: 12px;
    font-size: 16px;
    opacity: 0.75;
}

.input-group input {
    width: 100%;
    padding: 12px 5px 12px 34px;
    font-size: 15px;
    color: #ffffff;
    background: transparent;
    border: none;
    border-bottom: 1.5px solid rgba(255, 255, 255, 0.45);
    outline: none;
}

.input-group label {
    position: absolute;
    top: 12px;
    left: 34px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    pointer-events: none;
    transition: 0.25s ease;
}

.input-group input:focus,
.input-group input:valid {
    border-bottom-color: #38bdf8;
}

.input-group input:focus ~ label,
.input-group input:valid ~ label {
    top: -14px;
    left: 0;
    font-size: 12px;
    color: #38bdf8;
}

.login-btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: #0ea5e9;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
    cursor: pointer;
    transition: 0.25s ease;
}

.login-btn:hover {
    background: #0284c7;
    box-shadow: 0 12px 24px rgba(14, 165, 233, 0.32);
    transform: translateY(-1px);
}

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

.error-box {
    margin-bottom: 26px;
    padding: 12px 14px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.18);
    border: 1px solid rgba(239, 68, 68, 0.45);
    color: #fecaca;
    font-size: 14px;
    text-align: center;
}

.access-note {
    margin-top: 28px;
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.68);
}

@media (max-width: 520px) {
    .login-box {
        padding: 38px 26px;
    }

    .login-header h1 {
        font-size: 30px;
    }
}