:root {
    --ujes-primary: #00b0f0;
    --ujes-primary-strong: #008ec1;
    --bg: #f4f8fb;
    --bg-alt: #eaf3f9;
    --surface: #ffffff;
    --text: #122330;
    --muted: #4b6475;
    --line: rgba(8, 25, 38, 0.12);
    --shadow: 0 24px 60px rgba(7, 25, 38, 0.16);
}

body {
    min-height: 100vh;
    color: var(--text);
    transition: background-color 0.28s ease, color 0.28s ease;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 15% 15%, rgba(0, 176, 240, 0.25), transparent 34%),
        radial-gradient(circle at 85% 0%, rgba(255, 255, 255, 0.3), transparent 36%),
        linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
}

body.dark {
    --bg: #07131d;
    --bg-alt: #0a1c2a;
    --surface: #102636;
    --text: #e3eef6;
    --muted: #9db5c4;
    --line: rgba(181, 219, 242, 0.2);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.login-wrap {
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.login-panel {
    width: min(100%, 620px);
}

.login-stage-mark {
    position: fixed;
    top: calc(50% - 30px);
    left: calc(50% - 200px);
    transform: translateY(-50%);
    width: min(73vw, 915px);
    pointer-events: none;
    opacity: 0.05;
    filter: saturate(1.05);
    z-index: 0;
}

.login-stage-mark img {
    display: block;
    width: 100%;
    height: auto;
}

body.dark .login-stage-mark {
    opacity: 0.04;
}

.login-card {
    border: 0;
    border-radius: 18px;
    overflow: hidden;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.login-card .card-body {
    padding: 2rem;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.login-brand img {
    width: 54px;
    height: 54px;
    object-fit: contain;
}

.login-brand-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
}

.login-brand-subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: var(--muted);
}

.form-label,
.form-check-label {
    color: var(--text);
}

.form-control {
    color: var(--text);
    background: color-mix(in srgb, var(--surface) 95%, transparent);
    border-color: var(--line);
}

.form-control::placeholder {
    color: var(--muted);
}

body.dark .form-control {
    background: #0d2231;
}

.form-control:focus,
.form-check-input:focus {
    border-color: var(--ujes-primary);
    box-shadow: 0 0 0 0.25rem rgba(0, 176, 240, 0.2);
}

.form-check-input:checked {
    background-color: var(--ujes-primary);
    border-color: var(--ujes-primary);
}

.btn-ujes {
    color: #012638;
    background: var(--ujes-primary);
    border-color: var(--ujes-primary);
    font-weight: 700;
}

.btn-ujes:hover,
.btn-ujes:focus {
    color: #ffffff;
    background: var(--ujes-primary-strong);
    border-color: var(--ujes-primary-strong);
}

.login-footer-note {
    margin-top: 1rem;
    margin-bottom: 0;
    text-align: center;
    color: var(--muted);
    font-size: 0.82rem;
}

.theme-fab {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    width: 58px;
    height: 58px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--surface);
    box-shadow: var(--shadow);
    color: var(--text);
    display: grid;
    place-items: center;
    cursor: pointer;
    z-index: 90;
}

.icon {
    position: absolute;
    width: 24px;
    height: 24px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.icon-sun {
    opacity: 0;
    transform: scale(0.7) rotate(-30deg);
}

.icon-moon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

body.dark .icon-sun {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

body.dark .icon-moon {
    opacity: 0;
    transform: scale(0.7) rotate(30deg);
}

@media (max-width: 576px) {
    .login-stage-mark {
        width: 113vw;
        left: 30%;
        opacity: 0.04;
    }

    .login-panel {
        width: 100%;
    }

    .login-card .card-body {
        padding: 1.3rem;
    }
}