:root {
    --brand-900: #1E2A38;
    --brand-850: #223142;
    --brand-800: #27384b;
    --brand-700: #38506a;
    --surface: #FFFFFF;
    --surface-alt: #F4F6F8;
    --text-primary: #1E2A38;
    --text-secondary: #7E8898;
    --border: rgba(30, 42, 56, 0.12);
    --border-strong: rgba(30, 42, 56, 0.22);
    --focus: rgba(30, 42, 56, 0.16);
    --danger: #B33A3A;
    --danger-bg: rgba(179, 58, 58, 0.08);
    --shadow:
        0 28px 60px rgba(21, 31, 43, 0.10),
        0 8px 18px rgba(21, 31, 43, 0.05);
    --radius: 4px;
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at 10% 10%, rgba(30, 42, 56, 0.06), transparent 0 18%),
        linear-gradient(180deg, #fbfcfd 0%, #f2f4f6 100%);
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
}

body::before {
    background:
        linear-gradient(rgba(30, 42, 56, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 42, 56, 0.05) 1px, transparent 1px);
    background-size: 92px 92px;
    mask-image: linear-gradient(135deg, rgba(0, 0, 0, 0.96), transparent 70%);
    opacity: 0.78;
    transform: perspective(1500px) rotateX(76deg) rotateZ(-9deg) scale(1.08) translate(-12%, 14%);
    transform-origin: top left;
}

body::after {
    background:
        radial-gradient(circle at 10% 10%, rgba(255, 255, 255, 0.92), transparent 0 18%),
        radial-gradient(circle at 24% 16%, rgba(255, 255, 255, 0.5), transparent 0 20%);
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 40px 20px 28px;
}

.login-card {
    position: relative;
    width: min(100%, 480px);
    padding: 0;
    border-radius: var(--radius);
    border: 1px solid rgba(30, 42, 56, 0.10);
    background: var(--surface);
    background-clip: padding-box;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.65),
        var(--shadow);
    transform: translateY(-4vh);
    animation: card-enter 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
    overflow: hidden;
}

.card-topbar {
    height: 6px;
    border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
    background: linear-gradient(90deg, var(--brand-900) 0%, #31465e 45%, #5f7388 100%);
}

.card-body {
    padding: 0;
}

.card-header {
    padding: 20px 28px 16px;
    border-bottom: 1px solid rgba(30, 42, 56, 0.08);
    background: #ffffff;
}

.brand-lockup {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
}

.brand-logo {
    max-width: 100%;
    max-height: 40px;
    object-fit: contain;
    display: block;
}

.header-kicker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 28px;
    padding: 0 10px;
    border: 1px solid rgba(30, 42, 56, 0.12);
    background: #ffffff;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
}

.header-kicker svg {
    width: 14px;
    height: 14px;
    display: inline-block;
    flex: 0 0 auto;
    transform: translateY(-1px);
    fill: currentColor;
}

.form-section {
    padding: 28px 32px 32px;
}

.title-block {
    position: relative;
    margin: 0 0 26px;
    padding-left: 18px;
}

.title-block::before {
    content: "";
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 4px;
    background: var(--brand-900);
}

h1 {
    margin: 0 0 5px;
    font-size: clamp(1.8rem, 1.55rem + 0.55vw, 1.95rem);
    font-weight: 700;
    letter-spacing: -0.06em;
    line-height: 1;
}

.login-intro {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.45;
}

form {
    display: grid;
    gap: 12px;
}

.field {
    display: grid;
    gap: 6px;
}

label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.015em;
}

.input-wrap {
    position: relative;
}

input {
    width: 100%;
    min-height: 50px;
    padding: 0 14px;
    border-radius: var(--radius);
    border: 1px solid rgba(30, 42, 56, 0.14);
    background: #ffffff;
    color: var(--text-primary);
    font: inherit;
    font-size: 0.94rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    outline: none;
    transition:
        border-color 160ms ease,
        box-shadow 160ms ease,
        background-color 160ms ease;
}

input::placeholder {
    color: #a0a9b8;
}

input:hover {
    border-color: rgba(30, 42, 56, 0.22);
    background: #ffffff;
}

input:focus {
    border-color: var(--brand-700);
    box-shadow: 0 0 0 3px var(--focus);
    background: #ffffff;
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    transition:
        color 160ms ease,
        background-color 160ms ease;
}

.password-toggle:hover,
.password-toggle:focus-visible {
    color: var(--brand-900);
    background: rgba(30, 42, 56, 0.06);
    outline: none;
}

.password-toggle:active {
    transform: translateY(-50%);
}

.password-toggle svg {
    width: 18px;
    height: 18px;
    display: block;
}

.validation-summary-errors,
.validation-summary-valid {
    margin: 0;
    padding: 0;
    list-style: none;
}

.validation-summary-valid {
    display: none;
}

.validation-summary-errors {
    display: grid;
    gap: 6px;
    padding: 11px 13px;
    border-radius: 4px;
    border: 1px solid rgba(179, 58, 58, 0.12);
    background: rgba(179, 58, 58, 0.06);
    color: var(--danger);
    font-size: 0.82rem;
    line-height: 1.4;
}

.validation-summary-errors ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.validation-summary-errors li {
    margin: 0;
}

.field-validation-error,
.field-validation-valid {
    font-size: 0.8rem;
    line-height: 1.35;
}

.field-validation-valid {
    display: none;
}

.field-validation-error {
    display: block;
    color: var(--danger);
    margin-top: -1px;
}

.input-validation-error {
    border-color: rgba(179, 58, 58, 0.45);
    box-shadow: none;
}

.submit-button {
    min-height: 50px;
    margin-top: 10px;
    border: 0;
    border-radius: var(--radius);
    background: var(--brand-900);
    color: #ffffff;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    cursor: pointer;
    box-shadow:
        0 12px 22px rgba(30, 42, 56, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    transition:
        transform 160ms ease,
        box-shadow 160ms ease,
        background-color 160ms ease;
}

.submit-button:hover,
.submit-button:focus-visible {
    background: var(--brand-850);
    box-shadow:
        0 14px 24px rgba(30, 42, 56, 0.14),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    outline: none;
}

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

.submit-button[disabled] {
    cursor: wait;
}

@keyframes card-enter {
    from {
        opacity: 0;
        transform: translateY(calc(-4vh + 10px));
    }

    to {
        opacity: 1;
        transform: translateY(-4vh);
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-card,
    input,
    .submit-button,
    .password-toggle {
        animation: none;
        transition: none;
    }
}

@media (max-width: 640px) {
    .login-shell {
        padding: 24px 14px;
    }

    .login-card {
        width: min(100%, 420px);
        border-radius: 4px;
        transform: translateY(-2vh);
    }

    body::before {
        background-size: 72px 72px;
        opacity: 0.52;
        transform: perspective(900px) rotateX(75deg) rotateZ(-6deg) scale(1.45) translate(-10%, 24%);
    }

    .card-header {
        padding: 18px 18px 16px;
    }

    .brand-lockup {
        align-items: center;
        flex-direction: row;
        gap: 10px;
    }

    .form-section {
        padding: 22px 18px 22px;
    }

    .brand-logo {
        max-height: 34px;
    }

    .header-kicker {
        min-height: 26px;
        padding: 0 8px;
        font-size: 0.62rem;
        letter-spacing: 0.07em;
    }

    .header-kicker svg {
        width: 12px;
        height: 12px;
        transform: translateY(-0.5px);
    }
}