/* =====================================================================
   AUTH · login + cambio password
   Estilo: industrial automotriz, dos columnas, branding Lubrimotors
   ===================================================================== */

.auth-body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-app);
    font-family: var(--font-sans);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.auth-shell {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    min-height: 100vh;
}

/* ============ Panel izquierdo: branding ============ */

.auth-brand {
    position: relative;
    background: var(--brand-secondary);
    color: #fff;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-10);
}

/* Capa decorativa con grid de fondo */
.auth-brand__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.auth-brand__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85), transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.85), transparent 80%);
}

.auth-brand__stripe {
    position: absolute;
    left: -10%;
    right: -10%;
    height: 80px;
    background: linear-gradient(90deg, transparent, var(--brand-primary), transparent);
    transform: rotate(-8deg);
    opacity: 0.18;
}
.auth-brand__stripe--top    { top: 8%; }
.auth-brand__stripe--bottom { bottom: 8%; opacity: 0.12; }

/* Engranajes decorativos como SVG inline en CSS */
.auth-brand__gear {
    position: absolute;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.04);
    box-shadow: inset 0 0 0 18px rgba(255, 255, 255, 0.02);
    pointer-events: none;
}
.auth-brand__gear::before,
.auth-brand__gear::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px dashed rgba(227, 6, 19, 0.18);
}
.auth-brand__gear::after {
    transform: scale(0.6);
    border-color: rgba(255, 255, 255, 0.05);
    border-style: solid;
}
.auth-brand__gear--lg {
    width: 540px;
    height: 540px;
    top: -180px;
    right: -180px;
    animation: gear-spin 60s linear infinite;
}
.auth-brand__gear--sm {
    width: 280px;
    height: 280px;
    bottom: -80px;
    left: -80px;
    animation: gear-spin-rev 80s linear infinite;
}

@keyframes gear-spin {
    to { transform: rotate(360deg); }
}
@keyframes gear-spin-rev {
    to { transform: rotate(-360deg); }
}

/* Contenido del branding */
.auth-brand__content {
    position: relative;
    z-index: 2;
    max-width: 480px;
    width: 100%;
}

.auth-brand__logo {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(2.4rem, 5vw, 3.2rem);
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: baseline;
}
.auth-brand__logo-lubri  { color: #fff; }
.auth-brand__logo-motors { color: var(--brand-primary); }

.auth-brand__tag {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--fs-lg);
    letter-spacing: 0.18em;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--brand-primary);
    display: inline-block;
}
.auth-brand__tag span {
    color: var(--brand-primary);
    margin-left: var(--space-2);
}

.auth-brand__headline {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 2.4vw, 2rem);
    line-height: 1.25;
    color: #fff;
    margin: 0 0 var(--space-10);
}
.auth-brand__headline em {
    font-style: normal;
    color: var(--brand-primary);
    position: relative;
}

.auth-brand__features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-12);
    display: grid;
    gap: var(--space-3);
}
.auth-brand__features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--fs-sm);
}
.auth-brand__features li::before {
    content: '';
    flex: 0 0 8px;
    height: 8px;
    background: var(--brand-primary);
    transform: rotate(45deg);
}

.auth-brand__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-6);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: var(--fs-xs);
    color: rgba(255, 255, 255, 0.5);
}
.auth-brand__footer strong { color: rgba(255, 255, 255, 0.8); font-weight: 600; }
.auth-brand__version {
    font-family: var(--font-mono);
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
}

/* ============ Panel derecho: formulario ============ */

.auth-form-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-8);
    background: var(--bg-surface);
}

.auth-form {
    width: 100%;
    max-width: 380px;
}

.auth-form__header {
    margin-bottom: var(--space-8);
}
.auth-form__header h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: var(--fs-3xl);
    color: var(--text-primary);
    margin: 0 0 var(--space-2);
    letter-spacing: -0.02em;
}
.auth-form__header p {
    color: var(--text-secondary);
    margin: 0;
    font-size: var(--fs-sm);
}

/* Alertas */
.auth-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    font-size: var(--fs-sm);
    line-height: 1.4;
    animation: alert-slide 200ms ease;
}
@keyframes alert-slide {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}
.auth-alert--error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-left: 3px solid var(--color-danger);
}
.auth-alert--success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-left: 3px solid var(--color-success);
}
.auth-alert__icon {
    flex: 0 0 22px;
    height: 22px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.65);
}

/* Campos */
.auth-form__body { display: grid; gap: var(--space-4); }

.auth-field { display: flex; flex-direction: column; gap: var(--space-2); }
.auth-field label {
    font-size: var(--fs-xs);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.auth-field input[type="text"],
.auth-field input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border-default);
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    background: var(--bg-surface);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-family: inherit;
}
.auth-field input::placeholder { color: var(--text-tertiary); }
.auth-field input:hover  { border-color: var(--border-strong); }
.auth-field input:focus  {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--brand-primary-light);
}

.auth-field__hint {
    color: var(--text-tertiary);
    font-size: var(--fs-xs);
}

.auth-field__password-wrap {
    position: relative;
}
.auth-field__password-wrap input { padding-right: 76px; }
.auth-field__toggle {
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast);
}
.auth-field__toggle:hover {
    color: var(--brand-primary);
    background: var(--brand-primary-light);
}

/* Botón submit */
.auth-submit {
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    width: 100%;
    padding: 14px var(--space-5);
    background: var(--brand-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background var(--transition-fast), transform 80ms ease, box-shadow var(--transition-fast);
    position: relative;
    box-shadow: 0 4px 14px rgba(227, 6, 19, 0.25);
}
.auth-submit:hover {
    background: var(--brand-primary-hover);
    box-shadow: 0 6px 20px rgba(227, 6, 19, 0.32);
}
.auth-submit:active { transform: translateY(1px); }
.auth-submit__arrow {
    font-size: 1.2em;
    transition: transform var(--transition-base);
}
.auth-submit:hover .auth-submit__arrow { transform: translateX(3px); }

/* Panel de demo */
.auth-demo {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--bg-app);
    border: 1px dashed var(--border-default);
    border-radius: var(--radius-md);
}
.auth-demo__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}
.auth-demo__header strong {
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}
.auth-demo__badge {
    background: var(--color-warning);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.08em;
}
.auth-demo__note {
    margin: 0 0 var(--space-3);
    font-size: var(--fs-xs);
    color: var(--text-tertiary);
}
.auth-demo__btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: left;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}
.auth-demo__btn:hover {
    border-color: var(--brand-primary);
    background: var(--brand-primary-light);
}
.auth-demo__role {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--text-primary);
}
.auth-demo__user {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--brand-primary);
    background: var(--bg-surface);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.auth-form__footer {
    margin-top: var(--space-8);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}
.auth-form__footer small {
    color: var(--text-tertiary);
    font-size: var(--fs-xs);
}
.auth-form__link {
    color: var(--text-link);
    text-decoration: none;
    font-size: var(--fs-sm);
}
.auth-form__link:hover { text-decoration: underline; }

/* ============ Layout single (cambio password) ============ */
.auth-single {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-8);
    background: linear-gradient(180deg, var(--brand-secondary) 0%, #2a2a2a 100%);
    position: relative;
    overflow: hidden;
}
.auth-single::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6), transparent);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6), transparent);
}
.auth-form--center {
    background: var(--bg-surface);
    padding: var(--space-10) var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 440px;
    position: relative;
    z-index: 1;
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
    .auth-shell {
        grid-template-columns: 1fr;
    }
    .auth-brand {
        min-height: 240px;
        padding: var(--space-6) var(--space-6);
    }
    .auth-brand__features { display: none; }
    .auth-brand__headline { font-size: var(--fs-lg); margin-bottom: var(--space-4); }
    .auth-brand__tag      { margin-bottom: var(--space-4); }
    .auth-brand__footer   { display: none; }
    .auth-brand__gear--lg { width: 320px; height: 320px; top: -100px; right: -100px; }
    .auth-brand__gear--sm { display: none; }
    .auth-form-wrap       { padding: var(--space-8) var(--space-4); }
}