/* =============================================================
   Silanes · Strategic Sourcing — Portal
   Paleta corporativa: rojo coral + petróleo profundo + turquesa
   (extraída del sitio público de Silanes)
   ============================================================= */

:root {
    /* —— Paleta corporativa Silanes —— */
    --silanes-red: #DC4A3D; /* rojo coral (CTAs principales)   */
    --silanes-red-hi: #E86C5F; /* hover                           */
    --silanes-red-deep: #B73A30; /* pressed / sombra                */
    --silanes-petrol: #003939; /* petróleo corporativo profundo   */
    --silanes-petrol-2: #0A4242; /* petróleo intermedio             */
    --silanes-teal: #14B8B8; /* turquesa acento (mapa de sitio) */
    --silanes-teal-soft: #5FE0E0; /* turquesa claro                  */
    /* Sistema */
    --bg-0: #001A1A;
    --bg-1: var(--silanes-petrol);
    --ink-0: #FFFFFF;
    --ink-1: #D7DEDC;
    --ink-2: #8FA09D;
    --ink-3: #5A6663;
    --accent: var(--silanes-teal);
    --accent-soft: var(--silanes-teal-soft);
    --cta: var(--silanes-red);
    --cta-hi: var(--silanes-red-hi);
    --danger: #F87171;
    --success: var(--silanes-teal-soft);
    --glass: rgba(0, 30, 30, 0.55);
    --glass-line: rgba(95, 224, 224, 0.14);
    --glass-hi: rgba(255, 255, 255, 0.04);
    /* Tipografía */
    --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-body: 'Outfit', system-ui, -apple-system, Segoe UI, sans-serif;
    /* Curvas */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--ink-0);
    background: var(--bg-0);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
    cursor: pointer;
}

/* =============================================================
   VIDEO DE FONDO
   ============================================================= */
.hero-video {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: var(--silanes-petrol);
}

    .hero-video video {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        animation: heroIn 1.4s var(--ease-out) both;
    }

    .hero-video.fallback video {
        display: none;
    }

    .hero-video.fallback {
        background: url('assets/hero-poster.jpg') center/cover no-repeat var(--silanes-petrol);
    }

/* Overlay teñido con la paleta corporativa para legibilidad */
.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(120% 80% at 80% 50%, rgba(0,57,57,0) 0%, rgba(0,42,42,0.55) 55%, rgba(0,26,26,0.92) 100%), linear-gradient(180deg, rgba(0,57,57,0.45) 0%, rgba(0,42,42,0.28) 35%, rgba(0,26,26,0.78) 100%);
    pointer-events: none;
}
/* Grano cinematográfico */
.hero-grain {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.06;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='1'/></svg>");
}

@keyframes heroIn {
    from {
        transform: scale(1.02);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* =============================================================
   HEADER CORPORATIVO
   ============================================================= */
.brand-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 40px 76px;
}

/* ── Logo corporativo: animación cíclica sincronizada al video ──
   Ciclo único de 20.48 s (igual que la duración del video).
   Cubre la entrada inicial Y el loop posterior con una sola curva
   para que no haya parpadeos al empalmar animaciones.

       0 %   →  invisible, ligeramente desplazado a la izquierda
   0 →  7 %  →  fade-in + slide (entra mientras el video también
                hace su fade-in desde negro)
       50%   →  totalmente visible (corazón del ciclo)
      92 %   →  comienza el fade-out
     100 %   →  invisible (coincide con el fade-out del video) */
.brand-logo {
    display: inline-flex;
    opacity: 0;
    will-change: opacity, transform;
    animation: logoCycle 20.48s linear infinite both;
}

    .brand-logo img {
        height: 80px;
        width: auto;
        filter: brightness(1.05) drop-shadow(0 2px 14px rgba(0, 0, 0, 0.75)) drop-shadow(0 0 24px rgba(20, 184, 184, 0.18));
    }

@keyframes logoCycle {
    0% {
        opacity: 0;
        transform: translateX(-22px);
    }

    7% {
        opacity: 1;
        transform: translateX(0);
    }

    92% {
        opacity: 1;
        transform: translateX(0);
    }

    100% {
        opacity: 0;
        transform: translateX(-10px);
    }
}

/* Si el usuario prefiere menos movimiento, logo fijo y visible */
.brand-bar.no-cycle .brand-logo {
    animation: none;
    opacity: 1;
    transform: none;
}

.brand-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-1);
    animation: fadeDown 1s 0.4s var(--ease-out) both;
}

    .brand-meta .dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 12px var(--accent);
        animation: pulse 2.4s ease-in-out infinite;
    }

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.4);
        opacity: 0.55;
    }
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =============================================================
   STAGE — layout principal a 2 columnas
   ============================================================= */
.stage {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 64px;
    padding: 120px 80px 100px;
    max-width: 1480px;
    margin: 0 auto;
}

/* ---------- Columna izquierda: copy editorial ---------- */
.intro {
    max-width: 560px;
    animation: fadeUp 1s 0.7s var(--ease-out) both;
}

.kicker {
    margin: 0 0 18px;
    font-size: 12px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--accent-soft);
    font-weight: 500;
}

    .kicker::before {
        content: '';
        display: inline-block;
        width: 36px;
        height: 1px;
        background: var(--accent-soft);
        vertical-align: middle;
        margin-right: 14px;
    }

.intro-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(48px, 7vw, 92px);
    line-height: 0.98;
    letter-spacing: -0.01em;
    margin: 0 0 24px;
    color: #fff;
}

    .intro-title em {
        font-style: italic;
        font-weight: 400;
        color: var(--accent-soft);
    }

.intro-lead {
    font-size: 17px;
    line-height: 1.65;
    color: var(--ink-1);
    margin: 0 0 32px;
    max-width: 480px;
}

.intro-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

    .intro-features li {
        font-size: 14px;
        color: var(--ink-1);
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .intro-features span {
        color: var(--cta);
        font-size: 9px;
    }

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =============================================================
   TARJETA DE LOGIN — light glass sobre video oscuro
   Filosofía: claridad para uso diario, contraste WCAG AA+,
   tipografía editorial en gris petróleo. Acentos rojo coral y
   turquesa Silanes intactos.
   ============================================================= */
.login-card {
    /* Tokens scoped al card claro */
    --c-bg: rgba(255, 255, 255, 0.94);
    --c-tint: rgba(240, 248, 248, 0.55);
    --c-border: rgba(0, 57, 57, 0.08);
    --c-ink: #0A2A2A; /* casi negro, tinte petróleo */
    --c-ink-2: #4A5854; /* gris medio */
    --c-ink-3: #8B9794; /* gris suave */
    --c-input-bg: rgba(0, 57, 57, 0.035);
    --c-input-border: rgba(0, 57, 57, 0.12);
    --c-teal-deep: #0A6E72; /* turquesa legible sobre claro */

    position: relative;
    width: 100%;
    max-width: 460px;
    padding: 44px 40px 36px;
    border-radius: 18px;
    background: linear-gradient(160deg, var(--c-tint) 0%, transparent 55%), var(--c-bg);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    border: 1px solid var(--c-border);
    box-shadow: 0 50px 100px -30px rgba(0, 0, 0, 0.55), 0 18px 40px -18px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.9);
    justify-self: end;
    color: var(--c-ink);
    animation: cardIn 1.1s 0.9s var(--ease-out) both;
}

    .login-card::before {
        /* Línea acento turquesa superior — más visible sobre fondo claro */
        content: '';
        position: absolute;
        top: 0;
        left: 28px;
        right: 28px;
        height: 2px;
        background: linear-gradient(90deg, transparent, var(--accent), transparent);
        border-radius: 2px;
        opacity: 0.95;
    }

@keyframes cardIn {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Badge "Strategic Sourcing" — pill petróleo con logo blanco */
.login-card__badge {
    width: 100%;
    display: inline-flex;
    align-items: center;
    max-height:50px;
    padding: 6px 0px 6px 53px;
    background: var(--silanes-petrol);
    border: 1px solid rgba(0, 57, 57, 0.5);
    border-radius: 70px;
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: #FFFFFF;
    font-weight: 600;
    margin-bottom: 26px;
    box-shadow: 0 2px 8px -2px rgba(0, 57, 57, 0.35);
}

    .login-card__badge img {
        height: 40px;
        width: 40px;
        /*object-fit: contain;*/
    }

.login-card__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 36px;
    line-height: 1.1;
    margin: 0 0 6px;
    color: var(--c-ink);
    letter-spacing: -0.005em;
}

.login-card__subtitle {
    margin: 0 0 28px;
    font-size: 14px;
    color: var(--c-ink-2);
    line-height: 1.5;
}

/* ---------- Campos ---------- */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-card .field label {
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-ink-2);
    font-weight: 600;
}

.login-card .field__control {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--c-input-bg);
    border: 1px solid var(--c-input-border);
    border-radius: 12px;
    transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

    .login-card .field__control:focus-within {
        border-color: var(--accent);
        background: rgba(20, 184, 184, 0.05);
        box-shadow: 0 0 0 4px rgba(20, 184, 184, 0.18);
    }

.login-card .field__icon {
    width: 18px;
    height: 18px;
    fill: var(--c-ink-3);
    margin: 0 10px 0 14px;
    flex-shrink: 0;
    transition: fill 0.25s;
}

.login-card .field__control:focus-within .field__icon {
    fill: var(--c-teal-deep);
}

.login-card .field input {
    flex: 1;
    background: transparent;
    border: 0;
    outline: 0;
    padding: 14px 14px 14px 0;
    color: var(--c-ink);
    font-family: var(--font-body);
    font-size: 15px;
    letter-spacing: 0.01em;
}

    .login-card .field input::placeholder {
        color: var(--c-ink-3);
    }

/* Mostrar/ocultar contraseña */
.login-card .field__toggle {
    background: transparent;
    border: 0;
    padding: 10px 14px;
    color: var(--c-ink-3);
    transition: color 0.2s;
    display: flex;
}

    .login-card .field__toggle:hover {
        color: var(--c-ink);
    }

    .login-card .field__toggle svg {
        width: 18px;
        height: 18px;
        fill: currentColor;
    }

    .login-card .field__toggle.is-visible {
        color: var(--c-teal-deep);
    }

/* ---------- Fila opciones ---------- */
.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 2px;
}

.login-card .check {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--c-ink-2);
    cursor: pointer;
    user-select: none;
}

.check input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.login-card .check__box {
    width: 16px;
    height: 16px;
    border: 1.5px solid rgba(0, 57, 57, 0.3);
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    background: #fff;
}

    .login-card .check__box::after {
        content: '';
        width: 8px;
        height: 8px;
        background: var(--accent);
        border-radius: 2px;
        transform: scale(0);
        transition: transform 0.18s var(--ease-out);
    }

.login-card .check input:checked + .check__box {
    border-color: var(--accent);
    background: rgba(20, 184, 184, 0.08);
}

    .login-card .check input:checked + .check__box::after {
        transform: scale(1);
    }

.login-card .link-muted, .login-card .link-accent {
    font-size: 13px;
    position: relative;
    transition: color 0.2s;
}

.login-card .link-muted {
    color: var(--c-ink-2);
    font-weight: 500;
}

    .login-card .link-muted:hover {
        color: var(--c-teal-deep);
    }

.login-card .link-accent {
    color: var(--c-teal-deep);
    font-weight: 600;
}

    .login-card .link-accent::after {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        bottom: -2px;
        height: 1px;
        background: currentColor;
        transform: scaleX(0);
        transform-origin: right;
        transition: transform 0.3s var(--ease-out);
    }

    .login-card .link-accent:hover::after {
        transform: scaleX(1);
        transform-origin: left;
    }

/* ---------- Mensaje de feedback ---------- */
.login-card .form-message {
    font-size: 13px;
    min-height: 0;
    /*color: var(--c-ink-3);*/
    padding: 0 2px;
    transition: all 0.25s;
}

    .login-card .form-message.is-error {
        color: #B73A30;
        font-weight: 500;
    }

    .login-card .form-message.is-success {
        color: var(--c-teal-deep);
        font-weight: 500;
    }

/* ---------- Botón principal — ROJO CORPORATIVO ----------
   El rojo coral pop mucho más sobre fondo blanco; profundizamos
   la sombra para que se sienta elevado sobre el papel. */
.btn-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 20px;
    border: 0;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: #FFFFFF;
    background: linear-gradient(135deg, var(--silanes-red-hi) 0%, var(--silanes-red) 55%, var(--silanes-red-deep) 100%);
    overflow: hidden;
    transition: transform 0.2s var(--ease-out), box-shadow 0.3s;
    box-shadow: 0 14px 32px -10px rgba(220, 74, 61, 0.55), 0 4px 12px -4px rgba(220, 74, 61, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.28);
    margin-top: 6px;
}

    .btn-primary::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.34) 50%, transparent 70%);
        transform: translateX(-100%);
        transition: transform 0.7s var(--ease-out);
    }

    .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: 0 18px 42px -10px rgba(220, 74, 61, 0.7), 0 6px 16px -4px rgba(220, 74, 61, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.32);
    }

        .btn-primary:hover::before {
            transform: translateX(100%);
        }

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

    .btn-primary svg {
        width: 18px;
        height: 18px;
        fill: none;
        stroke: currentColor;
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
        transition: transform 0.25s var(--ease-out);
    }

    .btn-primary:hover svg {
        transform: translateX(4px);
    }

    .btn-primary.is-loading {
        pointer-events: none;
        color: transparent;
    }

        .btn-primary.is-loading::after {
            content: '';
            position: absolute;
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255,255,255,0.35);
            border-top-color: #fff;
            border-radius: 50%;
            animation: spin 0.7s linear infinite;
        }

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

.login-card__help {
    margin: 22px 0 0;
    text-align: center;
    font-size: 13px;
    color: var(--c-ink-2);
}

/* =============================================================
   FOOTER — banda petróleo corporativo
   ============================================================= */
.brand-foot {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 5;
    padding: 18px 40px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--ink-1);
    letter-spacing: 0.04em;
    background: linear-gradient(0deg, rgba(0,57,57,0.92), rgba(0,26,26,0.35) 70%, transparent);
    animation: fadeUp 1s 1.3s var(--ease-out) both;
}

    .brand-foot a {
        color: var(--ink-0);
        transition: color 0.2s;
    }

        .brand-foot a:hover {
            color: var(--accent-soft);
        }

.dot-sep {
    opacity: 0.4;
    color: var(--accent-soft);
}



/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 960px) {
    .stage {
        grid-template-columns: 1fr;
        padding: 100px 28px 60px;
        gap: 40px;
        min-height: auto;
    }

    .intro {
        max-width: 100%;
    }

    .login-card {
        justify-self: stretch;
        max-width: 100%;
    }

    .brand-bar {
        padding: 18px 24px;
    }

    .brand-meta__text {
        display: none;
    }

    .brand-logo img {
        height: 38px;
    }

    .brand-foot {
        position: static;
        background: var(--silanes-petrol);
        padding: 20px 24px;
    }
}

@media (max-width: 520px) {
    .brand-bar {
        padding: 14px 20px;
    }

    .brand-logo img {
        height: 32px;
    }

    .stage {
        padding: 78px 18px 50px;
    }

    .login-card {
        padding: 32px 24px 28px;
        border-radius: 16px;
    }

    .login-card__title {
        font-size: 28px;
    }

    .intro-title {
        font-size: clamp(40px, 12vw, 56px);
    }

    .form-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .brand-foot {
        font-size: 11px;
        padding: 18px 16px;
    }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .hero-video video {
        animation: none;
    }

    .brand-logo {
        opacity: 1;
    }
}