/* ============================================================
   AZA LightManager · Authentication pages
   "Control room at dusk" — sodium-vapor amber on deep ink.
   ============================================================ */

.auth {
    --ink: #09090b;
    --ink-2: #101014;
    --ink-3: #16161b;
    --line: #22222a;
    --line-soft: #17171d;
    --fg: #f1ede4;
    --fg-mute: #8b867a;
    --fg-faint: #55524a;
    --lamp: #f0a524;
    --lamp-hot: #ffb83a;
    --lamp-glow: rgba(240, 165, 36, 0.14);
    --lamp-dim: rgba(240, 165, 36, 0.22);
    --danger: #e0584b;

    position: fixed;
    inset: 0;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    background: var(--ink);
    color: var(--fg);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    overflow: hidden;
    z-index: 1000;
}

/* ------- decorative backdrop ---------------------------------- */

.auth__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.auth__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--line-soft) 1px, transparent 1px),
        linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 90% 80% at 28% 42%, black 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 90% 80% at 28% 42%, black 0%, transparent 75%);
}

.auth__lamps {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 7% 15%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 22% 8%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 38% 26%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 16% 46%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 31% 58%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 9% 71%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 42% 79%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 20% 89%, var(--lamp) 0.8px, transparent 1.8px),
        radial-gradient(circle at 48% 18%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 12% 34%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 27% 37%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 45% 48%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 6% 61%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 36% 66%, var(--lamp) 0.6px, transparent 1.4px),
        radial-gradient(circle at 26% 94%, var(--lamp) 0.6px, transparent 1.4px);
    opacity: 0.55;
    animation: lamp-drift 12s ease-in-out infinite;
}

@keyframes lamp-drift {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.7; }
}

.auth__glow-a {
    position: absolute;
    top: -25%;
    left: -15%;
    width: 70%;
    height: 70%;
    background: radial-gradient(circle, var(--lamp-glow) 0%, transparent 62%);
    filter: blur(40px);
}

.auth__glow-b {
    position: absolute;
    bottom: -35%;
    right: -20%;
    width: 75%;
    height: 75%;
    background: radial-gradient(circle, rgba(240, 165, 36, 0.06) 0%, transparent 65%);
    filter: blur(60px);
}

.auth__noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='2' seed='5'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/></svg>");
    opacity: 0.035;
    mix-blend-mode: overlay;
}

/* ------- brand column ----------------------------------------- */

.auth__brand {
    position: relative;
    padding: 48px 64px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 64px;
    border-right: 1px solid var(--line);
    z-index: 1;
}

.auth__chrome {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--fg-mute);
    text-transform: uppercase;
}

.mark {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mark__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--lamp);
    box-shadow: 0 0 12px var(--lamp), 0 0 24px var(--lamp-glow);
    animation: mark-pulse 2.4s ease-in-out infinite;
}

@keyframes mark-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.55; transform: scale(0.85); }
}

.auth__hero {
    max-width: 640px;
}

.eyebrow {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--lamp);
}

.display {
    font-family: 'Instrument Serif', 'Times New Roman', serif;
    font-size: clamp(68px, 9vw, 128px);
    font-weight: 400;
    line-height: 0.92;
    margin: 28px 0 32px;
    letter-spacing: -0.02em;
}

.display > span { display: block; }

.display--italic {
    font-style: italic;
    color: var(--lamp);
}

.lede {
    max-width: 480px;
    font-size: 15px;
    line-height: 1.65;
    color: var(--fg-mute);
    margin: 0;
    font-weight: 400;
}

.auth__tele {
    display: grid;
    grid-template-columns: repeat(3, max-content);
    gap: 56px;
    margin: 0;
}

.auth__tele > div {
    border-left: 1px solid var(--line);
    padding-left: 16px;
}

.auth__tele dt {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 10px;
    letter-spacing: 0.22em;
    color: var(--fg-faint);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.auth__tele dd {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 13px;
    color: var(--fg);
    margin: 0;
    font-weight: 500;
}

/* ------- form column ----------------------------------------- */

.auth__form {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 56px;
    background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.3));
    z-index: 1;
}

.form-shell {
    width: 100%;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.form-shell__header {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-shell__title {
    font-family: 'Instrument Serif', 'Times New Roman', serif;
    font-weight: 400;
    font-size: 48px;
    line-height: 1;
    margin: 4px 0 0;
    letter-spacing: -0.01em;
}

.form-shell__sub {
    font-size: 14px;
    color: var(--fg-mute);
    margin: 0;
    line-height: 1.5;
}

/* --- error alert ----------------------------------------- */

.alert-error {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    background: rgba(224, 88, 75, 0.08);
    border-left: 2px solid var(--danger);
    color: var(--fg);
    font-size: 13px;
    line-height: 1.5;
}

.alert-error__mark {
    color: var(--danger);
    font-weight: 600;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    line-height: 1.5;
}

/* --- form fields ----------------------------------------- */

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field__label {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 10.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--fg-mute);
}

.field__input {
    width: 100%;
    height: 52px;
    padding: 0 16px;
    background: var(--ink-2);
    border: 1px solid var(--line);
    color: var(--fg);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    font-size: 15px;
    outline: none;
    transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
    border-radius: 0;
    box-sizing: border-box;
}

.field__input::placeholder {
    color: var(--fg-faint);
}

.field__input:hover {
    border-color: #3a3a44;
}

.field__input:focus {
    border-color: var(--lamp);
    box-shadow: 0 0 0 4px var(--lamp-glow);
    background: var(--ink-3);
}

.field__error {
    color: var(--danger);
    font-size: 12px;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    min-height: 0;
}

.field__error:empty {
    display: none;
}

/* --- row: remember me + forgot ----------------------- */

.row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2px;
}

.check {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--fg-mute);
    user-select: none;
}

.check__box {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--ink-2);
    border: 1px solid var(--line);
    cursor: pointer;
    position: relative;
    transition: all 150ms ease;
    margin: 0;
    flex-shrink: 0;
}

.check__box:checked {
    background: var(--lamp);
    border-color: var(--lamp);
}

.check__box:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid var(--ink);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.link {
    font-size: 13px;
    color: var(--fg-mute);
    text-decoration: none;
    border-bottom: 1px solid var(--line);
    padding-bottom: 1px;
    transition: color 150ms ease, border-color 150ms ease;
}

.link:hover {
    color: var(--lamp);
    border-bottom-color: var(--lamp);
}

/* --- buttons --------------------------------------- */

.submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    height: 52px;
    padding: 0 16px;
    border: 1px solid var(--lamp);
    background: var(--lamp);
    color: var(--ink);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 180ms ease, border-color 180ms ease, box-shadow 200ms ease, transform 80ms ease;
    margin-top: 6px;
    border-radius: 0;
    box-sizing: border-box;
}

.submit:hover {
    background: var(--lamp-hot);
    border-color: var(--lamp-hot);
    box-shadow: 0 0 28px var(--lamp-glow);
}

.submit:active {
    transform: translateY(1px);
}

.submit__arrow {
    transition: transform 180ms ease;
}

.submit:hover .submit__arrow {
    transform: translateX(3px);
}

.submit--ghost {
    background: transparent;
    color: var(--fg);
    border-color: var(--line);
}

.submit--ghost:hover {
    background: var(--ink-2);
    border-color: var(--lamp-dim);
    color: var(--lamp);
    box-shadow: none;
}

/* --- divider ----------------------------- */

.divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 6px 0;
    color: var(--fg-faint);
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 10.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--line);
}

/* --- footer ---------------------------- */

.form-shell__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 10.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg-faint);
}

/* --- ValidationMessage (Blazor emits <div class="validation-message">) --- */

.validation-message {
    color: var(--danger);
    font-size: 12px;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    margin-top: 4px;
}

/* --- responsive ---------------------------- */

@media (max-width: 960px) {
    .auth {
        grid-template-columns: 1fr;
        position: relative;
        min-height: 100vh;
    }

    .auth__brand {
        padding: 32px 28px;
        border-right: none;
        border-bottom: 1px solid var(--line);
        gap: 40px;
    }

    .auth__hero {
        margin: 16px 0;
    }

    .display {
        font-size: clamp(52px, 12vw, 80px);
        margin: 20px 0 24px;
    }

    .auth__tele {
        gap: 32px;
    }

    .auth__form {
        padding: 40px 28px;
    }

    .form-shell__title {
        font-size: 36px;
    }
}

@media (max-width: 540px) {
    .auth__chrome > .meta {
        display: none;
    }

    .auth__tele {
        grid-template-columns: 1fr 1fr;
        gap: 20px 32px;
    }

    .auth__tele > div:last-child {
        grid-column: 1 / -1;
    }
}