:root {
    --auth-blue: #0082ca;
    --auth-blue-deep: #00639c;
    --auth-cyan: #00aeef;
    --auth-silver: #b2b2b2;
    --auth-black: #000000;
    --auth-ink: #0b0b0b;
    --auth-muted: #6b7280;
    --auth-panel: #ffffff;
    --auth-panel-bg: #f4f6f8;
    --auth-line: #cfd6dd;
    --auth-danger: #b42318;
    --auth-font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
    --auth-font-body: "Figtree", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

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

body.auth-body {
    font-family: var(--auth-font-body);
    color: var(--auth-ink);
    background: var(--auth-black);
    min-height: 100vh;
}

.auth-stage {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
}

.auth-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(2rem, 5vw, 4rem);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    color: #ffffff;
    background:
        linear-gradient(155deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 130, 202, 0.45) 55%, rgba(0, 174, 239, 0.35) 100%),
        radial-gradient(ellipse at 18% 12%, rgba(0, 174, 239, 0.35), transparent 42%),
        linear-gradient(180deg, #0a0a0a 0%, #001018 100%);
}

.auth-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 174, 239, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 130, 202, 0.08) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: 0.7;
    animation: auth-grid-drift 28s linear infinite;
    pointer-events: none;
}

.auth-hero::after {
    content: "";
    position: absolute;
    width: 140%;
    height: 42%;
    left: -20%;
    bottom: -8%;
    background:
        radial-gradient(circle at 18% 40%, rgba(0, 130, 202, 0.45), transparent 28%),
        radial-gradient(circle at 62% 30%, rgba(0, 174, 239, 0.25), transparent 24%),
        linear-gradient(105deg, transparent 0 18%, rgba(178, 178, 178, 0.22) 18% 22%, transparent 22% 48%, rgba(0, 130, 202, 0.28) 48% 51%, transparent 51%);
    transform: rotate(-8deg);
    animation: auth-pipe-shift 12s ease-in-out infinite alternate;
    pointer-events: none;
}

.auth-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 34rem;
    animation: auth-rise 0.9s ease-out both;
}

.auth-logo {
    display: block;
    width: min(280px, 70%);
    height: auto;
    margin-bottom: 1.75rem;
    filter: drop-shadow(0 8px 24px rgba(0, 130, 202, 0.25));
}

.auth-brand {
    margin: 0 0 1rem;
    font-family: var(--auth-font-display);
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 0.95;
    text-transform: uppercase;
    color: var(--auth-cyan);
}

.auth-brand span {
    display: block;
    font-size: 0.42em;
    font-weight: 500;
    letter-spacing: 0.22em;
    color: var(--auth-silver);
    margin-top: 0.35rem;
}

.auth-tagline {
    margin: 0 0 0.75rem;
    font-size: clamp(1.15rem, 2.2vw, 1.45rem);
    font-weight: 500;
    line-height: 1.35;
    max-width: 24ch;
    color: #ffffff;
}

.auth-meta {
    margin: 0;
    color: rgba(178, 178, 178, 0.95);
    font-size: 0.95rem;
    letter-spacing: 0.04em;
}

.auth-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem);
    background: linear-gradient(180deg, #f7f9fb 0%, #e8eef3 100%);
    position: relative;
}

.auth-panel::before {
    content: "";
    position: absolute;
    inset: 1.25rem;
    border: 1px solid rgba(0, 130, 202, 0.12);
    pointer-events: none;
}

.auth-form-wrap {
    width: 100%;
    max-width: 24rem;
    position: relative;
    z-index: 1;
    animation: auth-rise 0.9s ease-out 0.12s both;
}

.auth-form-wrap h1 {
    margin: 0 0 0.4rem;
    font-family: var(--auth-font-display);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--auth-blue);
}

.auth-form-wrap .lead {
    margin: 0 0 1.5rem;
    color: var(--auth-muted);
    font-size: 0.98rem;
    line-height: 1.5;
}

.auth-alert {
    background: #fdeceb;
    border: 1px solid #f0c2c0;
    color: var(--auth-danger);
    padding: 0.75rem 0.9rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.92rem;
}

.auth-form label {
    display: block;
    margin: 0 0 0.4rem;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--auth-blue-deep);
}

.auth-form .field {
    margin-bottom: 1.1rem;
}

.auth-form input {
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--auth-line);
    border-radius: 4px;
    background: var(--auth-panel);
    font: inherit;
    color: var(--auth-ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--auth-blue);
    box-shadow: 0 0 0 3px rgba(0, 130, 202, 0.2);
}

.auth-form button {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.95rem 1rem;
    border: 0;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--auth-cyan) 0%, var(--auth-blue) 100%);
    color: #ffffff;
    font-family: var(--auth-font-display);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.auth-form button:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
}

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

.auth-foot {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--auth-muted);
}

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

@keyframes auth-pipe-shift {
    from { transform: rotate(-8deg) translateX(0); }
    to { transform: rotate(-6deg) translateX(2%); }
}

@keyframes auth-rise {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .auth-stage {
        grid-template-columns: 1fr;
    }

    .auth-hero {
        min-height: 38vh;
        justify-content: flex-end;
        padding-bottom: 2rem;
    }

    .auth-logo {
        width: min(200px, 55%);
        margin-bottom: 1.1rem;
    }

    .auth-panel::before {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .auth-hero::before,
    .auth-hero::after,
    .auth-hero-inner,
    .auth-form-wrap {
        animation: none;
    }
}