:root {
    --login-ink: #13212b;
    --login-ink-soft: #2a3d4a;
    --login-mist: #e8eef2;
    --login-panel: #f7fafb;
    --login-line: rgba(19, 33, 43, 0.12);
    --login-accent: #0f6e6a;
    --login-accent-hover: #0b5754;
    --login-danger: #b42318;
    --login-font-display: "Montserrat", "Segoe UI", sans-serif;
    --login-font-body: "Montserrat", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body.login-body {
    margin: 0;
    min-height: 100%;
}

body.login-body {
    display: block;
    font-family: var(--login-font-body);
    color: var(--login-ink);
    background: var(--login-mist);
    -webkit-font-smoothing: antialiased;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
}

/* —— Brand plane —— */
.login-brand-plane {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: clamp(2rem, 5vw, 4.5rem);
    color: #f4f7f8;
    background:
        radial-gradient(1200px 700px at 10% 15%, rgba(15, 110, 106, 0.5), transparent 55%),
        radial-gradient(900px 600px at 85% 90%, rgba(90, 160, 170, 0.22), transparent 50%),
        linear-gradient(155deg, #0d1a22 0%, #16323a 42%, #1a4548 100%);
}

.login-brand-plane::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(244, 247, 248, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(244, 247, 248, 0.05) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 70% at 40% 40%, #000 20%, transparent 75%);
    animation: login-grid-drift 28s linear infinite;
    pointer-events: none;
}

.login-brand-plane::after {
    content: "";
    position: absolute;
    width: min(70vw, 640px);
    height: min(70vw, 640px);
    right: -12%;
    top: -18%;
    border: 1px solid rgba(244, 247, 248, 0.1);
    border-radius: 50%;
    animation: login-ring 12s ease-in-out infinite;
    pointer-events: none;
}

.login-brand-content {
    position: relative;
    z-index: 1;
    max-width: 28rem;
    animation: login-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.login-brand-mark {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.login-brand-mark img {
    width: 72px;
    height: auto;
    display: block;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.25));
}

.login-brand-name {
    margin: 0;
    font-family: var(--login-font-display);
    font-size: clamp(2.6rem, 5.5vw, 4.25rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 0.98;
}

.login-brand-name span {
    display: block;
    color: rgba(244, 247, 248, 0.55);
    font-size: 0.42em;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-top: 0.55rem;
}

.login-brand-lead {
    margin: 0;
    max-width: 22rem;
    font-size: 1.125rem;
    line-height: 1.5;
    color: rgba(244, 247, 248, 0.78);
}

/* —— Form plane —— */
.login-form-plane {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(247, 250, 251, 0.95)),
        var(--login-panel);
    animation: login-fade 0.8s 0.15s cubic-bezier(0.22, 1, 0.36, 1) both;
}

#login-page {
    width: 100%;
    max-width: 380px;
}

#login-page .login-form-kicker {
    margin: 0 0 0.35rem;
    font-family: var(--login-font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--login-accent);
}

#login-page .title {
    margin: 0 0 1.75rem;
    padding: 0;
    font-family: var(--login-font-display);
    font-size: clamp(1.85rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--login-ink);
}

#login-form .form-group {
    margin-bottom: 1rem;
}

#login-form .form-control {
    display: block;
    width: 100%;
    height: auto;
    min-height: 3.1rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--login-line);
    border-radius: 0.35rem;
    background: #fff;
    box-shadow: none;
    font-family: var(--login-font-body);
    font-size: 1rem;
    color: var(--login-ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

#login-form .form-control::placeholder {
    color: rgba(19, 33, 43, 0.42);
}

#login-form .form-control:focus {
    border-color: var(--login-accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(15, 110, 106, 0.16);
}

#login-form .help-block {
    margin: 0.35rem 0 0;
    font-size: 0.875rem;
    color: var(--login-danger);
}

#login-page .btn-row {
    margin-top: 1.5rem;
}

#login-page .login-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 3.15rem;
    padding: 0.85rem 1.25rem;
    border: 0;
    border-radius: 0.35rem;
    background: var(--login-accent);
    color: #fff;
    font-family: var(--login-font-display);
    font-size: 1rem;
    font-weight: 650;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

#login-page .login-submit:hover,
#login-page .login-submit:focus {
    background: var(--login-accent-hover);
    outline: none;
}

#login-page .login-submit:active {
    transform: translateY(1px);
}

@keyframes login-rise {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes login-fade {
    from {
        opacity: 0;
        transform: translateX(16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes login-grid-drift {
    from {
        transform: translate3d(0, 0, 0);
    }
    to {
        transform: translate3d(48px, 48px, 0);
    }
}

@keyframes login-ring {
    0%,
    100% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.06);
        opacity: 1;
    }
}

@media (max-width: 900px) {
    .login-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .login-brand-plane {
        min-height: 38vh;
        align-items: flex-end;
        padding: 1.75rem 1.5rem 2rem;
    }

    .login-brand-name {
        font-size: clamp(2.6rem, 12vw, 3.6rem);
    }

    .login-brand-lead {
        font-size: 1rem;
    }

    .login-form-plane {
        align-items: flex-start;
        padding-top: 2rem;
        animation-name: login-rise;
    }

    .login-brand-plane::after {
        width: 280px;
        height: 280px;
        right: -20%;
        top: -30%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-brand-content,
    .login-form-plane,
    .login-brand-plane::before,
    .login-brand-plane::after {
        animation: none !important;
    }
}