:root {
    --auth-bg-primary: #0a0e1a;
    --auth-bg-secondary: #121829;
    --auth-bg-tertiary: #1a2235;
    --auth-accent: #00d4aa;
    --auth-accent-hover: #00b894;
    --auth-text-primary: #ffffff;
    --auth-text-secondary: #a0aec0;
    --auth-border: rgba(255, 255, 255, 0.12);
    --auth-shadow: 0 22px 55px rgba(0, 0, 0, 0.45);
}

.login-page,
.register-page {
    min-height: 100vh;
    background:
        radial-gradient(1200px 520px at 8% 0%, rgba(0, 212, 170, 0.12) 0%, rgba(0, 212, 170, 0) 56%),
        radial-gradient(1000px 460px at 92% 100%, rgba(0, 184, 148, 0.14) 0%, rgba(0, 184, 148, 0) 54%),
        var(--auth-bg-primary);
    color: var(--auth-text-primary);
}

.login-box,
.register-box {
    width: min(420px, calc(100% - 2rem));
}

.card {
    background: linear-gradient(180deg, var(--auth-bg-secondary) 0%, var(--auth-bg-tertiary) 100%);
    border: 1px solid var(--auth-border);
    border-radius: 16px;
    box-shadow: var(--auth-shadow);
}

.login-card-body,
.register-card-body {
    background: transparent;
    color: var(--auth-text-primary);
    border-top: 0;
    border-radius: 16px;
    padding: 1.35rem;
}

.login-logo,
.register-logo {
    margin-bottom: 1rem;
}

.login-logo a,
.register-logo a {
    color: var(--auth-text-primary);
}

.auth-brand-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
}

.auth-brand-logo {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

.auth-brand-title {
    font-size: 1.95rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.login-box-msg,
.register-box-msg {
    color: var(--auth-text-secondary);
    padding: 0 0 1rem;
}

.input-group .form-control {
    background: rgba(12, 20, 36, 0.8);
    border: 1px solid var(--auth-border);
    color: var(--auth-text-primary);
}

.input-group .form-control::placeholder {
    color: #8ea2bf;
}

.input-group .form-control:focus {
    border-color: rgba(0, 212, 170, 0.55);
    box-shadow: 0 0 0 0.2rem rgba(0, 212, 170, 0.18);
}

.input-group-append .input-group-text {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--auth-border);
    color: var(--auth-text-secondary);
}

.icheck-primary label {
    color: var(--auth-text-secondary);
}

.icheck-primary input:checked + label::before {
    background-color: var(--auth-accent);
    border-color: var(--auth-accent);
}

.btn-primary {
    border-color: var(--auth-accent);
    background: var(--auth-accent);
    color: #041014;
    font-weight: 600;
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    border-color: var(--auth-accent-hover) !important;
    background: var(--auth-accent-hover) !important;
    color: #041014 !important;
}

a {
    color: var(--auth-accent);
}

a:hover {
    color: var(--auth-accent-hover);
}

.alert {
    border-radius: 10px;
}

.alert-danger,
.alert-warning {
    color: #fff;
    background: rgba(220, 53, 69, 0.2);
    border: 1px solid rgba(220, 53, 69, 0.5);
}

@media (max-width: 576px) {
    .login-box,
    .register-box {
        width: calc(100% - 1.25rem);
    }

    .auth-brand-title {
        font-size: 1.8rem;
    }
}