/**
 * Sentrion auth shell — split-screen login (tenant + landlord).
 * @see docs/backend/AUTH_LOGIN_UI.md
 */

#auth-container.sentrion-auth {
    --sentrion-auth-accent-1: #574299;
    --sentrion-auth-accent-2: #0029FF;
    --brand-accent-1: #574299;
    --brand-accent-2: #0029FF;
    --sentrion-auth-bg: #060b18;
    --sentrion-auth-card-bg: #ffffff;
    --sentrion-auth-text: #1f2937;
    --sentrion-auth-text-muted: #6b7280;
    --sentrion-auth-border: #e5e7eb;
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background:
        radial-gradient(circle at 18% 12%, rgba(87, 66, 153, 0.22), transparent 34%),
        radial-gradient(circle at 82% 78%, rgba(0, 41, 255, 0.18), transparent 36%),
        linear-gradient(145deg, #0a0f1f 0%, #1a1040 40%, #0d1a3a 100%);
}

#auth-container.sentrion-auth::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.35;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 24%),
        radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.03) 0%, transparent 28%);
    pointer-events: none;
}

.sentrion-auth__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    min-height: 100vh;
}

.sentrion-auth__hero {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
    overflow: hidden;
    padding: clamp(2rem, 5vw, 4rem) clamp(2rem, 5vw, 4rem) clamp(1.25rem, 3vw, 2rem);
    background: transparent;
}

.sentrion-auth__hero-body {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sentrion-auth__hero-footer {
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.55);
}

.sentrion-auth__hero-footer a {
    color: rgba(255, 255, 255, 0.82);
    text-decoration: none;
    font-weight: 600;
}

.sentrion-auth__hero-footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.sentrion-auth__panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem);
    background: transparent;
}

.sentrion-auth__card {
    width: min(100%, 420px);
    padding: clamp(1.75rem, 4vw, 2.25rem);
    border-radius: 20px;
    background: var(--sentrion-auth-card-bg);
    box-shadow: 0 24px 64px rgba(2, 6, 23, 0.12);
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.sentrion-auth__card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero component */
.sentrion-auth-hero {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: min(100%, 520px);
    text-align: center;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.sentrion-auth-hero.is-visible {
    opacity: 1;
}

.sentrion-auth-hero__glow {
    position: absolute;
    border-radius: 999px;
    filter: blur(72px);
    pointer-events: none;
    will-change: opacity, transform;
}

.sentrion-auth-hero__glow--primary {
    width: clamp(220px, 42vw, 380px);
    height: clamp(220px, 42vw, 380px);
    top: 18%;
    left: 8%;
    background: color-mix(in srgb, var(--sentrion-auth-accent-1) 72%, transparent);
    opacity: 0.42;
    animation: auth-hero-glow-pulse 5.5s ease-in-out infinite alternate;
}

.sentrion-auth-hero__glow--secondary {
    width: clamp(200px, 38vw, 340px);
    height: clamp(200px, 38vw, 340px);
    right: 6%;
    bottom: 14%;
    background: color-mix(in srgb, var(--sentrion-auth-accent-2) 68%, transparent);
    opacity: 0.36;
    animation: auth-hero-glow-pulse 6.8s ease-in-out infinite alternate-reverse;
}

.sentrion-auth-hero__spinner-wrap {
    position: relative;
    width: clamp(220px, 38vmin, 420px);
    height: clamp(220px, 38vmin, 420px);
    margin-bottom: 1.75rem;
}

.sentrion-auth-hero__spinner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sentrion-auth-hero__spinner .sentrion-spinner-inner {
    width: 100% !important;
    height: 100% !important;
}

.sentrion-auth-hero__spinner--static {
    display: none;
}

.sentrion-auth-hero__static-logo {
    width: clamp(96px, 22vmin, 140px);
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 18px 48px rgba(0, 41, 255, 0.28));
}

.sentrion-auth-hero__wordmark {
    display: block;
    width: min(100%, 220px);
    height: auto;
    filter: drop-shadow(0 12px 32px rgba(2, 6, 23, 0.35));
}

.sentrion-spinner--hero {
    filter:
        drop-shadow(0 20px 48px rgba(0, 41, 255, 0.24))
        drop-shadow(0 12px 36px rgba(87, 66, 153, 0.2));
}

@keyframes auth-hero-glow-pulse {
    0% {
        opacity: 0.28;
        transform: scale(0.96) translate3d(0, 0, 0);
    }

    100% {
        opacity: 0.48;
        transform: scale(1.06) translate3d(2%, -2%, 0);
    }
}

/* Form content inside auth card */
.sentrion-auth-form__header {
    text-align: center;
    margin-bottom: 1.25rem;
}

.sentrion-auth-form__tenant-logo {
    display: block;
    width: auto;
    max-width: min(100%, 260px);
    max-height: 64px;
    height: auto;
    margin: 0 auto 1rem;
    object-fit: contain;
    object-position: center;
}

.sentrion-auth-form__tenant-name {
    margin: 0 0 0.25rem;
    color: var(--sentrion-auth-text);
    font-size: clamp(1.05rem, 2.2vw, 1.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.35;
    text-wrap: balance;
}

.sentrion-auth-form__subtitle {
    margin: 0;
    color: var(--sentrion-auth-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.sentrion-auth-form__divider {
    height: 1px;
    margin: 1.25rem 0 1.5rem;
    background: var(--sentrion-auth-border);
}

.sentrion-auth-form .form-label {
    color: var(--sentrion-auth-text) !important;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.sentrion-auth-form .form-control {
    background: #ffffff !important;
    border: 1px solid var(--sentrion-auth-border) !important;
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 15px;
    color: var(--sentrion-auth-text) !important;
    box-shadow: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.sentrion-auth-form .form-control::placeholder {
    color: rgba(107, 114, 128, 0.75);
}

.sentrion-auth-form .form-control:focus {
    border-color: var(--sentrion-auth-accent-1) !important;
    box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--sentrion-auth-accent-1) 18%, transparent) !important;
    background-color: #ffffff !important;
}

.sentrion-auth-form .btn-primary {
    background: linear-gradient(135deg, var(--sentrion-auth-accent-1) 0%, var(--sentrion-auth-accent-2) 100%);
    border: none;
    border-radius: 10px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    box-shadow: 0 12px 28px color-mix(in srgb, var(--sentrion-auth-accent-2) 22%, rgba(4, 7, 17, 0.2));
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.sentrion-auth-form .btn-primary:hover {
    transform: translateY(-1px);
    filter: saturate(1.04);
    box-shadow: 0 16px 32px color-mix(in srgb, var(--sentrion-auth-accent-2) 28%, rgba(4, 7, 17, 0.22));
}

.sentrion-auth-form .btn-primary:active {
    transform: translateY(0);
}

.sentrion-auth-form .btn-primary:disabled {
    opacity: 0.72;
    cursor: wait;
    transform: none;
}

.sentrion-auth-form .btn-light {
    border-radius: 10px;
    border: 1px solid var(--sentrion-auth-border);
    color: var(--sentrion-auth-text);
    background: #f9fafb;
}

.sentrion-auth-form .link-primary {
    color: var(--sentrion-auth-accent-2);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.sentrion-auth-form .link-primary:hover {
    color: var(--sentrion-auth-accent-1);
    text-decoration: underline;
}

.sentrion-auth-form .text-danger {
    color: #ef4444 !important;
}

.sentrion-auth-form .text-gray-900,
.sentrion-auth-form h1 {
    color: var(--sentrion-auth-text) !important;
}

.sentrion-auth-form .text-gray-500,
.sentrion-auth-form .text-gray-700,
.sentrion-auth-form .text-muted {
    color: var(--sentrion-auth-text-muted) !important;
}

.sentrion-auth-form .form-check-label {
    color: var(--sentrion-auth-text-muted) !important;
}

@media (max-width: 991.98px) {
    .sentrion-auth__grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .sentrion-auth__hero {
        min-height: auto;
        padding: 2rem 1.5rem 1.25rem;
    }

    .sentrion-auth__hero-body {
        min-height: min(36vh, 320px);
    }

    .sentrion-auth-hero__spinner-wrap {
        width: clamp(180px, 34vmin, 280px);
        height: clamp(180px, 34vmin, 280px);
        margin-bottom: 1.25rem;
    }

    .sentrion-auth-hero__wordmark {
        width: min(100%, 180px);
    }

    .sentrion-auth__panel {
        padding: 1.25rem 1rem 2rem;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sentrion-auth-hero,
    .sentrion-auth__card,
    .sentrion-auth-hero__glow {
        animation: none !important;
        transition: none !important;
    }

    .sentrion-auth-hero,
    .sentrion-auth__card {
        opacity: 1 !important;
        transform: none !important;
    }

    .sentrion-auth-hero__spinner--animated {
        display: none;
    }

    .sentrion-auth-hero__spinner--static {
        display: flex;
    }
}