:root {
    color-scheme: light;
    --ink: #163247;
    --muted: #5a7488;
    --line: rgba(108, 173, 213, 0.28);
    --sky: #16a9e0;
    --sky-soft: #c8f0ff;
    --sky-deep: #0678a9;
    --navy: #0d3554;
    --white: #ffffff;
    --danger-bg: #fff3f4;
    --danger-text: #a61b2b;
    font-family: "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 18%, rgba(106, 205, 245, 0.42), transparent 28%),
        radial-gradient(circle at 88% 18%, rgba(255, 255, 255, 0.92), transparent 24%),
        linear-gradient(135deg, #e9f9ff 0%, #f8fdff 42%, #dff6ff 100%);
    overflow-x: hidden;
}

main,
.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 26px;
    position: relative;
    isolation: isolate;
}

.ambient,
.sky-ribbon {
    position: fixed;
    pointer-events: none;
    z-index: -1;
}

.ambient {
    width: 42vmax;
    height: 42vmax;
    border-radius: 50%;
    filter: blur(6px);
    opacity: 0.55;
    animation: float-sky 11s ease-in-out infinite alternate;
}

.ambient-one {
    left: -18vmax;
    top: -15vmax;
    background: radial-gradient(circle, rgba(22, 169, 224, 0.42), transparent 62%);
}

.ambient-two {
    right: -20vmax;
    bottom: -18vmax;
    background: radial-gradient(circle, rgba(3, 119, 167, 0.22), transparent 64%);
    animation-delay: -4s;
}

.sky-ribbon {
    inset: auto -8vw 8vh -8vw;
    height: 28vh;
    background: linear-gradient(90deg, rgba(22, 169, 224, 0), rgba(22, 169, 224, 0.22), rgba(13, 53, 84, 0.1), rgba(22, 169, 224, 0));
    transform: rotate(-5deg);
    animation: ribbon-drift 15s ease-in-out infinite alternate;
}

.panel,
.login-card {
    width: min(100%, 438px);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.78);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 26px 70px rgba(13, 53, 84, 0.18);
    backdrop-filter: blur(18px);
}

.brand-lockup {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
}

.brand-lockup img {
    display: block;
    width: min(148px, 46vw);
    max-height: 58px;
    object-fit: contain;
}

.brand-lockup span {
    color: var(--sky-deep);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    white-space: nowrap;
}

.headline {
    margin-bottom: 24px;
}

.eyebrow {
    margin-bottom: 8px;
    color: var(--sky-deep);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 8px;
    color: var(--navy);
    font-size: clamp(2rem, 7vw, 2.65rem);
    line-height: 1.2;
    letter-spacing: 0;
}

p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.field {
    margin-top: 16px;
}

label {
    display: block;
    margin: 0 0 7px;
    color: var(--navy);
    font-size: 0.93rem;
    font-weight: 750;
}

input {
    width: 100%;
    height: 50px;
    border: 1px solid rgba(6, 120, 169, 0.26);
    border-radius: 8px;
    padding: 0 14px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--ink);
    font: inherit;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

input::placeholder {
    color: #92aaba;
}

input:focus {
    border-color: var(--sky);
    outline: 0;
    box-shadow: 0 0 0 4px rgba(22, 169, 224, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.72);
    transform: translateY(-1px);
}

button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 52px;
    margin-top: 24px;
    border: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--sky), var(--sky-deep));
    color: var(--white);
    font: inherit;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 16px 34px rgba(6, 120, 169, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.28);
    transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
}

button:hover,
.button:hover {
    filter: brightness(1.04);
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(6, 120, 169, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

button:active,
.button:active {
    transform: translateY(0);
}

.alert {
    margin-bottom: 18px;
    padding: 12px 14px;
    border: 1px solid rgba(166, 27, 43, 0.12);
    border-radius: 8px;
    background: var(--danger-bg);
    color: var(--danger-text);
    line-height: 1.4;
}

span.field-validation-error {
    display: block;
    margin-top: 6px;
    color: var(--danger-text);
    font-size: 0.9rem;
}

@keyframes float-sky {
    from {
        transform: translate3d(0, 0, 0) scale(1);
    }

    to {
        transform: translate3d(4vw, 3vh, 0) scale(1.08);
    }
}

@keyframes ribbon-drift {
    from {
        transform: translateY(0) rotate(-5deg);
    }

    to {
        transform: translateY(-4vh) rotate(-3deg);
    }
}

@media (max-width: 520px) {
    main,
    .login-shell {
        padding: 18px;
        align-items: start;
    }

    .login-card,
    .panel {
        margin-top: 22px;
        padding: 24px;
    }

    .brand-lockup {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
    }

    .brand-lockup span {
        white-space: normal;
    }
}