* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: #ffffff;
    background:
        linear-gradient(135deg, rgba(2, 18, 42, 0.94), rgba(3, 45, 82, 0.88)),
        url('/Autonomous-ship-1024x512.jpg') center/cover no-repeat;
}

.brand-header {
    position: fixed;
    top: 24px;
    left: 32px;
    z-index: 10;
}

.brand-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 2px;
}

.brand-subtitle {
    margin-top: 4px;
    font-size: 13px;
    letter-spacing: 3px;
    color: #7ed7ff;
    text-transform: uppercase;
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 96px 20px 40px;
}

.login-card {
    width: 100%;
    max-width: 430px;
    padding: 38px 34px;
    border-radius: 22px;
    background: rgba(5, 23, 48, 0.78);
    border: 1px solid rgba(126, 215, 255, 0.28);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(14px);
}

.card-badge {
    display: inline-block;
    padding: 7px 13px;
    border-radius: 999px;
    font-size: 12px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: #7ed7ff;
    background: rgba(126, 215, 255, 0.12);
    border: 1px solid rgba(126, 215, 255, 0.22);
}

.login-card h1 {
    margin: 18px 0 8px;
    font-size: 32px;
}

.card-text {
    margin: 0 0 26px;
    color: #c8d9e8;
    line-height: 1.5;
}

label {
    display: block;
    margin: 18px 0 8px;
    font-size: 13px;
    color: #dbeaf6;
}

input {
    width: 100%;
    height: 48px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid rgba(126, 215, 255, 0.28);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 15px;
    outline: none;
}

input:focus {
    border-color: #7ed7ff;
    box-shadow: 0 0 0 3px rgba(126, 215, 255, 0.16);
}

button {
    width: 100%;
    height: 50px;
    margin-top: 26px;
    border: none;
    border-radius: 13px;
    background: linear-gradient(135deg, #168dff, #00c2ff);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
}

button:hover {
    filter: brightness(1.08);
}

.error-box {
    padding: 12px 14px;
    margin-bottom: 18px;
    border-radius: 12px;
    background: rgba(255, 76, 76, 0.14);
    border: 1px solid rgba(255, 76, 76, 0.35);
    color: #ffd6d6;
    font-size: 14px;
}

.back-link {
    display: block;
    margin-top: 22px;
    text-align: center;
    color: #7ed7ff;
    text-decoration: none;
    font-size: 14px;
}

@media (max-width: 600px) {
    .brand-header {
        top: 18px;
        left: 20px;
    }

    .brand-title {
        font-size: 22px;
    }

    .brand-subtitle {
        font-size: 11px;
        letter-spacing: 2px;
    }

    .login-card {
        padding: 30px 22px;
        border-radius: 18px;
    }

    .login-card h1 {
        font-size: 27px;
    }
}