/* Login UPG — generado desde login.php */
/* SweetAlert UPG — alertas de login (neutras, sin gradientes) */
    .upg-swal-popup {
        width: 25rem;
        max-width: calc(100vw - 2rem);
        padding: 0 !important;
        border-radius: 14px !important;
        overflow: hidden;
        background: #fff !important;
        border: 1px solid #e2e8f0 !important;
        box-shadow: 0 18px 48px rgba(15, 23, 42, 0.12) !important;
        font-family: 'Inter', sans-serif !important;
    }
    .upg-swal-popup .swal2-title {
        display: none !important;
    }
    .upg-swal-popup .swal2-html-container {
        margin: 0 !important;
        padding: 0 !important;
        overflow: visible !important;
        text-align: left !important;
    }
    .upg-swal-popup .swal2-actions {
        margin: 0 !important;
        padding: 0 1.35rem 1.25rem !important;
        width: 100%;
    }
    .upg-swal-popup .swal2-close {
        color: #94a3b8 !important;
        top: .55rem !important;
        right: .55rem !important;
        transition: color .15s;
    }
    .upg-swal-popup .swal2-close:hover {
        color: #334155 !important;
    }
    .upg-swal {
        text-align: left;
        padding: 1.35rem 1.35rem .25rem;
    }
    .upg-swal-icon {
        width: 42px;
        height: 42px;
        border-radius: 10px;
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        color: #475569;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        margin-bottom: .85rem;
    }
    .upg-swal-title {
        font-size: 1.02rem;
        font-weight: 700;
        color: #0f172a;
        margin: 0 0 1rem;
        line-height: 1.35;
    }
    .upg-swal-block + .upg-swal-block {
        margin-top: .85rem;
    }
    .upg-swal-label {
        font-size: .66rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: .07em;
        color: #94a3b8;
        margin-bottom: .35rem;
    }
    .upg-swal-problem {
        font-size: .88rem;
        font-weight: 600;
        color: #1e293b;
        line-height: 1.5;
        margin: 0;
    }
    .upg-swal-suggestion {
        font-size: .84rem;
        color: #64748b;
        line-height: 1.55;
        margin: 0;
        padding: .65rem .75rem;
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        border-radius: 8px;
    }
    .upg-swal-btn {
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
        width: 100%;
        padding: .6rem 1.15rem !important;
        border: 1px solid #cbd5e1 !important;
        border-radius: 9px !important;
        background: #fff !important;
        color: #1e293b !important;
        font-size: .86rem !important;
        font-weight: 600 !important;
        box-shadow: none !important;
        transition: background .15s, border-color .15s;
    }
    .upg-swal-btn:hover {
        background: #f8fafc !important;
        border-color: #94a3b8 !important;
        transform: none;
    }
    .upg-swal-btn:focus {
        box-shadow: 0 0 0 3px rgba(148, 163, 184, 0.35) !important;
    }
    @keyframes upgSwalIn {
        from { opacity: 0; transform: translateY(10px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .upg-swal-popup.swal2-show {
        animation: upgSwalIn .24s ease-out !important;
    }
    .upg-swal-popup.upg-swal-hide {
        opacity: 0 !important;
        transition: opacity .32s ease !important;
    }
    .upg-swal-popup--auto.upg-swal-popup--logout,
    .upg-swal-popup--auto.upg-swal-closing {
        width: min(42rem, calc(100vw - 1.5rem)) !important;
        padding: 0 !important;
        border-radius: 1.25rem !important;
        background: #0b1220 !important;
        border: 1px solid rgba(96, 165, 250, 0.22) !important;
        box-shadow:
            0 0 0 1px rgba(255, 255, 255, 0.04) inset,
            0 24px 64px rgba(2, 6, 23, 0.55),
            0 0 0 1px rgba(37, 99, 235, 0.08) !important;
        overflow: hidden !important;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-swal,
    .upg-swal--brand-only {
        position: relative;
        padding: 0;
        text-align: center;
        min-height: clamp(26rem, 62vh, 32rem);
        overflow: hidden;
    }
    .upg-swal-body {
        transition: opacity .38s ease, transform .42s cubic-bezier(.4, 0, .2, 1);
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-swal-body {
        display: none;
    }
    .upg-swal-close-loader {
        position: absolute;
        inset: 0;
        z-index: 2;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: clamp(2rem, 5vh, 3rem) clamp(1.25rem, 4vw, 2.5rem);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: scale(.985);
        transition: opacity .4s ease, transform .45s cubic-bezier(.22, 1, .36, 1), visibility 0s linear .45s;
        background:
            radial-gradient(ellipse 88% 70% at 50% 36%, rgba(37, 99, 235, 0.26) 0%, transparent 70%),
            radial-gradient(ellipse 70% 50% at 50% 82%, rgba(14, 165, 233, 0.14) 0%, transparent 65%),
            linear-gradient(180deg, #111827 0%, #0b1220 100%);
        overflow: hidden;
    }
    .upg-swal-brand-only .upg-swal-close-loader,
    .upg-swal-popup--auto.upg-swal-closing .upg-swal-close-loader {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: scale(1);
        transition: opacity .4s ease, transform .45s cubic-bezier(.22, 1, .36, 1), visibility 0s;
    }
    .upg-swal-close-loader::before,
    .upg-swal-close-loader::after {
        content: none;
        display: none;
    }
    .upg-swal-close-stage {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: clamp(1.15rem, 3.2vh, 1.85rem);
        width: 100%;
        max-width: 36rem;
    }
    .upg-swal-status {
        margin: 0;
        font-family: 'Inter', system-ui, sans-serif;
        font-size: .72rem;
        font-weight: 600;
        letter-spacing: .22em;
        text-transform: uppercase;
        color: #94a3b8;
        opacity: 0;
        transform: translateY(8px);
        z-index: 2;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-swal-status {
        animation: upgCaptionIn .5s cubic-bezier(.22, 1, .36, 1) .04s forwards;
    }
    .upg-swal-close-caption {
        margin: 0;
        font-family: 'Playfair Display', Georgia, serif;
        font-size: clamp(1rem, 2.6vw, 1.28rem);
        font-weight: 600;
        font-style: italic;
        letter-spacing: .12em;
        line-height: 1.3;
        text-align: center;
        color: rgba(255, 255, 255, 0.96);
        text-shadow: 0 0 20px rgba(96, 165, 250, 0.22);
        opacity: 0;
        transform: translateY(10px);
        z-index: 2;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-swal-close-caption {
        animation: upgCaptionIn .55s cubic-bezier(.22, 1, .36, 1) 1.7s forwards;
    }
    @keyframes upgCaptionIn {
        to { opacity: 1; transform: translateY(0); }
    }
    .upg-loader-brand {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: clamp(.75rem, 2.8vw, 1.75rem);
        z-index: 1;
        width: 100%;
    }
    .upg-loader-brand.upg-loader-brand--done {
        filter: none;
        animation: none;
    }
    .upg-loader-brand--done .upg-letter--u {
        filter:
            drop-shadow(0 0 2px rgba(255, 255, 255, 0.4))
            drop-shadow(0 0 12px rgba(34, 211, 238, 0.7))
            drop-shadow(0 0 28px rgba(34, 211, 238, 0.35));
    }
    .upg-loader-brand--done .upg-letter--p {
        filter:
            drop-shadow(0 0 2px rgba(255, 255, 255, 0.4))
            drop-shadow(0 0 12px rgba(232, 121, 249, 0.7))
            drop-shadow(0 0 28px rgba(232, 121, 249, 0.35));
    }
    .upg-loader-brand--done .upg-letter--g {
        filter:
            drop-shadow(0 0 2px rgba(255, 255, 255, 0.4))
            drop-shadow(0 0 12px rgba(251, 146, 60, 0.7))
            drop-shadow(0 0 28px rgba(251, 146, 60, 0.35));
    }

    /* Vidrio + líquido neón — proporciones UI */
    .upg-letter {
        --size: clamp(5.75rem, 16vw, 9.25rem);
        --neon: #22d3ee;
        --neon-soft: #67e8f9;
        position: relative;
        width: var(--size);
        height: var(--size);
        display: block;
        flex: 0 0 auto;
        filter:
            drop-shadow(0 0 3px rgba(255, 255, 255, 0.28))
            drop-shadow(0 0 8px color-mix(in srgb, var(--neon) 45%, transparent))
            drop-shadow(0 0 20px color-mix(in srgb, var(--neon) 22%, transparent));
    }
    .upg-letter-svg {
        display: block;
        width: 100%;
        height: 100%;
        overflow: visible;
    }
    .upg-letter-glass,
    .upg-letter-liquid {
        transform-origin: 50% 50%;
    }
    .upg-edge-glow {
        fill: none;
        stroke-width: 13.5;
        opacity: 0;
        filter: blur(1.5px);
        pointer-events: none;
    }
    .upg-glass {
        fill: none;
        stroke-width: 11;
        opacity: 0;
        pointer-events: none;
    }
    .upg-neon-bloom,
    .upg-liquid {
        fill: none;
        stroke-dasharray: var(--path-len);
        stroke-dashoffset: var(--path-len);
    }
    .upg-neon-bloom {
        stroke-width: 14.5;
        opacity: .28;
        filter: blur(1.8px);
    }
    .upg-liquid {
        stroke-width: 9;
        opacity: 1;
    }

    .upg-swal-popup--auto.upg-swal-closing .upg-edge-glow {
        animation: upgEdgeGlowIn .55s ease-out forwards;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-glass {
        animation: upgEdgeRimIn .55s ease-out forwards;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-letter--p .upg-edge-glow,
    .upg-swal-popup--auto.upg-swal-closing .upg-letter--p .upg-glass {
        animation-delay: .1s;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-letter--g .upg-edge-glow,
    .upg-swal-popup--auto.upg-swal-closing .upg-letter--g .upg-glass {
        animation-delay: .18s;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-neon-bloom,
    .upg-swal-popup--auto.upg-swal-closing .upg-liquid {
        animation: upgLiquidFill var(--draw-dur, 1.3s) cubic-bezier(.22, .1, .18, 1) var(--draw-delay, 0ms) forwards;
    }
    .upg-swal-popup--auto.upg-swal-closing .upg-letter-liquid {
        animation: upgLiquidBob 2.8s ease-in-out 1.55s infinite;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-edge-glow {
        opacity: .24;
        transition: opacity .4s ease;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-glass {
        opacity: .4;
        transition: opacity .4s ease;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-neon-bloom {
        opacity: .36;
        stroke-width: 15;
        transition: opacity .4s ease, stroke-width .45s ease;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-liquid {
        stroke-width: 9.25;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-letter {
        animation: upgLetterSettle .65s cubic-bezier(.22, 1.15, .36, 1) both;
    }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-letter--u { animation-delay: .02s; }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-letter--p { animation-delay: .07s; }
    .upg-swal-popup--auto.upg-swal-letters-done .upg-letter--g { animation-delay: .12s; }

    @keyframes upgEdgeGlowIn {
        0%   { opacity: 0; }
        100% { opacity: .2; }
    }
    @keyframes upgEdgeRimIn {
        0%   { opacity: 0; }
        100% { opacity: .36; }
    }
    @keyframes upgLiquidFill {
        0% {
            stroke-dashoffset: var(--path-len);
            stroke-width: 7;
        }
        100% {
            stroke-dashoffset: 0;
            stroke-width: 9;
        }
    }
    @keyframes upgLiquidBob {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-1px); }
    }
    @keyframes upgLetterSettle {
        0%   { transform: translateY(0) scale(1); }
        50%  { transform: translateY(-2px) scale(1.015); }
        100% { transform: translateY(0) scale(1); }
    }

    .upg-swal-popup .swal2-close.upg-swal-close--light {
        top: .85rem !important;
        right: .9rem !important;
        width: 2rem;
        height: 2rem;
        border-radius: 999px;
        color: #94a3b8 !important;
        font-size: 1.35rem !important;
        transition: color .2s ease, background .2s ease, transform .2s ease;
    }
    .upg-swal-popup .swal2-close.upg-swal-close--light:hover {
        color: #fff !important;
        background: rgba(148, 163, 184, 0.12);
        transform: scale(1.04);
    }
    @media (max-width: 480px) {
        .upg-swal-popup--auto.upg-swal-popup--logout,
        .upg-swal-popup--auto.upg-swal-closing {
            width: calc(100vw - 1rem) !important;
            border-radius: 1rem !important;
        }
        .upg-swal--brand-only,
        .upg-swal-popup--auto.upg-swal-closing .upg-swal {
            min-height: 22rem;
        }
        .upg-swal-close-loader {
            padding: 2rem 1rem 1.75rem;
        }
        .upg-swal-close-stage {
            gap: 1rem;
        }
        .upg-letter {
            --size: clamp(4.6rem, 22vw, 6.2rem);
        }
        .upg-glass { stroke-width: 10; }
        .upg-edge-glow { stroke-width: 12; }
        .upg-liquid { stroke-width: 8; }
        .upg-neon-bloom { stroke-width: 13; }
        .upg-loader-brand { gap: .55rem; }
        .upg-swal-status {
            font-size: .66rem;
            letter-spacing: .18em;
        }
        .upg-swal-close-caption {
            font-size: clamp(.92rem, 3.8vw, 1.05rem);
            letter-spacing: .1em;
        }
    }
    @media (prefers-reduced-motion: reduce) {
        .upg-swal-close-loader,
        .upg-swal-popup--auto.upg-swal-popup--logout,
        .upg-swal-popup--auto.upg-swal-closing {
            transition: none !important;
        }
        .upg-swal-popup--auto.upg-swal-closing .upg-swal-close-loader::before,
        .upg-swal-popup--auto.upg-swal-closing .upg-swal-close-loader::after {
            animation: none !important;
            opacity: .55 !important;
        }
        .upg-loader-brand.upg-loader-brand--done {
            animation: none !important;
        }
        .upg-swal-status,
        .upg-swal-close-caption,
        .upg-swal-popup--auto.upg-swal-closing .upg-swal-status,
        .upg-swal-popup--auto.upg-swal-closing .upg-swal-close-caption {
            animation: none !important;
            opacity: 1 !important;
            transform: none !important;
        }
        .upg-swal-popup--auto.upg-swal-closing .upg-edge-glow,
        .upg-swal-popup--auto.upg-swal-closing .upg-glass,
        .upg-swal-popup--auto.upg-swal-closing .upg-neon-bloom,
        .upg-swal-popup--auto.upg-swal-closing .upg-liquid,
        .upg-swal-popup--auto.upg-swal-closing .upg-letter-liquid,
        .upg-swal-popup--auto.upg-swal-letters-done .upg-letter {
            animation: none !important;
        }
        .upg-swal-popup--auto.upg-swal-closing .upg-edge-glow {
            opacity: .22 !important;
        }
        .upg-swal-popup--auto.upg-swal-closing .upg-glass {
            opacity: .38 !important;
        }
        .upg-swal-popup--auto.upg-swal-closing .upg-neon-bloom,
        .upg-swal-popup--auto.upg-swal-closing .upg-liquid {
            stroke-dashoffset: 0 !important;
            opacity: .85 !important;
        }
    }
    


        :root {
            --primary-navy: #1e3a5f;
            --primary-blue: #2563eb;
            --secondary-teal: #0891b2;
            --accent-gold: #f59e0b;
            --accent-emerald: #059669;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: 
                linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.80) 50%, rgba(51, 65, 85, 0.85) 100%),
                url('../img/fondo_login.webp') center/cover no-repeat fixed,
                linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(168, 85, 247, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(34, 197, 94, 0.06) 0%, transparent 50%);
            z-index: -1;
            animation: loginBgPulse 14s ease-in-out infinite alternate;
        }

        @keyframes loginBgPulse {
            0%   { opacity: 0.85; transform: scale(1); }
            100% { opacity: 1; transform: scale(1.04); }
        }

        .main {
            display: flex;
            justify-content: center;
            align-items: center;
            width: 100%;
            padding: clamp(12px, 3vw, 28px);
            position: relative;
            z-index: 1;
        }

        /* ── Aura / destello alrededor del panel ───────────────── */
        .login-glow-wrap {
            position: relative;
            max-width: 1100px;
            width: 100%;
            padding: 2px;
            border-radius: 26px;
            isolation: isolate;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.35), rgba(8, 145, 178, 0.25));
            box-shadow:
                0 0 32px rgba(37, 99, 235, 0.18),
                0 0 64px rgba(8, 145, 178, 0.1);
        }

        .login-glow-wrap::before {
            content: '';
            position: absolute;
            inset: -40%;
            border-radius: inherit;
            background: conic-gradient(
                from 0deg,
                rgba(96, 165, 250, 0.12),
                rgba(37, 99, 235, 0.55),
                rgba(8, 145, 178, 0.45),
                rgba(255, 255, 255, 0.4),
                rgba(37, 99, 235, 0.55),
                rgba(96, 165, 250, 0.12)
            );
            animation: glowRotate 12s linear infinite;
            pointer-events: none;
            z-index: 0;
        }

        .login-glow-wrap > .login-sparkles,
        .login-glow-wrap > .login-container {
            position: relative;
            z-index: 1;
        }

        @keyframes glowRotate {
            from { transform: rotate(0deg); }
            to   { transform: rotate(360deg); }
        }

        .login-glow-wrap::after {
            content: '';
            position: absolute;
            inset: -28px;
            border-radius: 40px;
            background:
                radial-gradient(ellipse 70% 55% at 50% 50%, rgba(59, 130, 246, 0.22) 0%, transparent 72%),
                radial-gradient(ellipse 40% 30% at 20% 30%, rgba(8, 145, 178, 0.12) 0%, transparent 70%),
                radial-gradient(ellipse 40% 30% at 80% 70%, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
            animation: glowAuraPulse 5.5s ease-in-out infinite;
            pointer-events: none;
            z-index: -1;
            filter: blur(2px);
        }

        @keyframes glowAuraPulse {
            0%, 100% { opacity: 0.55; transform: scale(0.97); }
            50%      { opacity: 1; transform: scale(1.03); }
        }

        .login-sparkles {
            position: absolute;
            inset: 0;
            border-radius: inherit;
            overflow: hidden;
            pointer-events: none;
            z-index: 2;
        }

        .login-sparkle {
            position: absolute;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 0 8px rgba(147, 197, 253, 0.9), 0 0 16px rgba(59, 130, 246, 0.5);
            opacity: 0;
            animation: sparkleFloat 6s ease-in-out infinite;
        }

        .login-sparkle:nth-child(1) { top: 12%; left: 8%;  animation-delay: 0s; }
        .login-sparkle:nth-child(2) { top: 22%; right: 10%; animation-delay: 1.2s; }
        .login-sparkle:nth-child(3) { bottom: 18%; left: 14%; animation-delay: 2.4s; }
        .login-sparkle:nth-child(4) { bottom: 28%; right: 12%; animation-delay: 3.6s; }
        .login-sparkle:nth-child(5) { top: 48%; left: 4%;  animation-delay: 4.8s; }
        .login-sparkle:nth-child(6) { top: 55%; right: 5%; animation-delay: 0.8s; }

        @keyframes sparkleFloat {
            0%, 100% { opacity: 0; transform: scale(0.4) translateY(0); }
            20%      { opacity: 0.9; transform: scale(1) translateY(-4px); }
            50%      { opacity: 0.35; transform: scale(0.7) translateY(2px); }
            80%      { opacity: 0; transform: scale(0.3) translateY(6px); }
        }

        .login-container,
        .registration-container {
            background: transparent;
            backdrop-filter: none;
            -webkit-backdrop-filter: none;
            border-radius: 24px;
            box-shadow: 
                0 25px 50px rgba(0, 0, 0, 0.25),
                0 0 0 1px rgba(255, 255, 255, 0.2),
                0 0 48px rgba(37, 99, 235, 0.12);
            overflow: hidden;
            max-width: 100%;
            width: 100%;
            border: none;
            min-height: min(700px, calc(100vh - 48px));
            position: relative;
            z-index: 1;
            opacity: 0;
            transform: translateY(28px) scale(0.96);
            animation: loginShellIn 1s cubic-bezier(0.22, 1, 0.36, 1) 0.05s forwards;
        }

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

        .login-container::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(
                105deg,
                transparent 42%,
                rgba(255, 255, 255, 0.55) 50%,
                transparent 58%
            );
            transform: translateX(-130%);
            opacity: 0;
            pointer-events: none;
            z-index: 20;
        }

        @keyframes loginShine {
            0%   { transform: translateX(-130%); opacity: 0; }
            15%  { opacity: 0.85; }
            100% { transform: translateX(130%); opacity: 0; }
        }

        /* Animación deslizante (estilo AsmrProg): paneles que se intercambian */
        .login-brand-slide,
        .login-form-slide {
            position: absolute;
            top: 0;
            width: 50%;
            height: 100%;
            transition: transform 0.6s ease-in-out;
        }

        .login-brand-slide {
            left: 0;
            z-index: 5;
        }

        .login-form-slide {
            left: 50%;
            z-index: 2;
            overflow: visible;
        }

        .login-container[data-tab="staff"] .login-brand-slide {
            transform: translateX(100%);
        }

        .login-container[data-tab="staff"] .login-form-slide {
            transform: translateX(-100%);
        }

        .login-container.is-switching .login-panes {
            pointer-events: none;
        }

        .login-panel {
            width: 100%;
            height: 100%;
            min-width: 0;
            min-height: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: visible;
        }

        /* ── Panel marca (izq. o der. según pestaña) ───────────── */
        .login-panel.login-brand {
            background: linear-gradient(135deg, rgba(30, 58, 95, 0.97) 0%, rgba(37, 99, 235, 0.92) 50%, rgba(8, 145, 178, 0.97) 100%);
            color: #f8fafc;
            padding: clamp(1.75rem, 3vw, 2.5rem) clamp(1.25rem, 2.5vw, 2rem);
            text-align: center;
            overflow: hidden;
        }

        .login-panel.login-brand::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60" fill="none"><circle cx="30" cy="30" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
            opacity: 0.3;
            pointer-events: none;
            z-index: 0;
        }

        .login-panel.login-brand .login-brand-content {
            position: relative;
            z-index: 1;
            width: 100%;
            max-width: 360px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        /* ── Panel formulario ─────────────────────────────────── */
        .login-panel.login-form {
            background: #ffffff;
            padding: clamp(1.75rem, 3vw, 2.5rem) clamp(1.25rem, 3vw, 2.25rem);
            overflow-x: visible;
            overflow-y: auto;
            -webkit-overflow-scrolling: touch;
        }

        .login-panel.login-form .login-form-content {
            width: 100%;
            max-width: 420px;
            margin: 0 auto;
            flex: 0 0 auto;
        }

        /* Esquinas y separador según disposición en el contenedor */
        .login-container[data-tab="estudiante"] .login-panel.login-brand {
            border-radius: 24px 0 0 24px;
        }
        .login-container[data-tab="estudiante"] .login-panel.login-form {
            border-radius: 0 24px 24px 0;
            border-left: 1px solid #e2e8f0;
        }
        .login-container[data-tab="staff"] .login-panel.login-brand {
            border-radius: 0 24px 24px 0;
            border-left: 1px solid rgba(255, 255, 255, 0.12);
        }
        .login-container[data-tab="staff"] .login-panel.login-form {
            border-radius: 24px 0 0 24px;
        }

        .login-container.is-entering .login-brand-slide .login-brand,
        .login-container.is-entering .login-form-slide .login-form {
            animation: panelEnterFade 0.35s ease 0.08s both;
        }

        @keyframes panelEnterFade {
            from { opacity: 0; }
            to   { opacity: 1; }
        }

        /* Estudiante: marca izquierda, formulario derecha | Staff: invertido vía slide */

        .logo {
            width: clamp(120px, 22vw, 200px);
            height: clamp(120px, 22vw, 200px);
            background: 
                url('../img/logo_upg.png') center/cover no-repeat,
                linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 2rem;
            box-shadow: 
                0 15px 40px rgba(0, 0, 0, 0.25),
                0 0 0 6px rgba(255, 255, 255, 0.3),
                0 0 28px rgba(96, 165, 250, 0.45),
                0 0 56px rgba(37, 99, 235, 0.22);
            position: relative;
            transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            border: 4px solid rgba(255, 255, 255, 0.2);
            animation: logoFloat 5.5s ease-in-out infinite, logoGlowPulse 4s ease-in-out infinite alternate;
        }

        @keyframes logoGlowPulse {
            from {
                box-shadow:
                    0 15px 40px rgba(0, 0, 0, 0.25),
                    0 0 0 6px rgba(255, 255, 255, 0.28),
                    0 0 22px rgba(96, 165, 250, 0.35),
                    0 0 44px rgba(37, 99, 235, 0.15);
            }
            to {
                box-shadow:
                    0 18px 44px rgba(0, 0, 0, 0.28),
                    0 0 0 6px rgba(255, 255, 255, 0.38),
                    0 0 36px rgba(147, 197, 253, 0.65),
                    0 0 72px rgba(37, 99, 235, 0.32);
            }
        }

        .logo::before {
            content: '';
            position: absolute;
            inset: -14px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.35);
            animation: logoRing 3.2s ease-out infinite;
        }

        .logo::after {
            content: '';
            position: absolute;
            inset: -28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            animation: logoRing 3.2s ease-out 1.1s infinite;
            box-shadow: 0 0 24px rgba(96, 165, 250, 0.25);
        }

        @keyframes logoRing {
            0%   { transform: scale(0.92); opacity: 0.9; }
            70%  { transform: scale(1.12); opacity: 0; }
            100% { transform: scale(1.12); opacity: 0; }
        }

        @keyframes logoFloat {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50%      { transform: translateY(-12px) rotate(1.5deg); }
        }

        .login-brand-content > * {
            opacity: 1;
            transform: none;
        }

        .login-container.is-entering .login-brand-content > * {
            opacity: 0;
            transform: translateY(14px);
            animation: brandItemIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
        }

        .login-container.is-entering .login-brand-content > *:nth-child(1) { animation-delay: 0.42s; }
        .login-container.is-entering .login-brand-content > *:nth-child(2) { animation-delay: 0.52s; }
        .login-container.is-entering .login-brand-content > *:nth-child(3) { animation-delay: 0.62s; }
        .login-container.is-entering .login-brand-content > *:nth-child(4) { animation-delay: 0.72s; }
        .login-container.is-entering .login-brand-content > *:nth-child(5) { animation-delay: 0.82s; }

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

        .login-container:not(.is-entering) .login-brand-content > * {
            opacity: 1;
            transform: none;
        }

        .login-panel.login-brand h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.3;
            color: #ffffff;
        }

        .login-panel.login-brand .login-subtitle {
            font-size: 1.05rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 0;
        }

        .login-panel.login-brand .login-desc {
            font-size: 0.92rem;
            line-height: 1.65;
            margin-top: 1.25rem;
            margin-bottom: 1.25rem;
            color: rgba(241, 245, 249, 0.88);
        }

        .login-panel.login-brand p {
            color: rgba(241, 245, 249, 0.88);
        }

        .login-icons {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .login-icons i {
            opacity: 0.8;
            transition: all 0.3s ease;
        }

        .login-icons i:hover {
            opacity: 1;
            transform: scale(1.1);
        }

        .login-form-content > .mb-4,
        .login-form-content > h3,
        .login-form-content > .login-tab-nav {
            opacity: 1;
            transform: none;
        }

        .login-container.is-entering .login-form-content > .mb-4,
        .login-container.is-entering .login-form-content > h3,
        .login-container.is-entering .login-form-content > .login-tab-nav {
            opacity: 0;
            transform: translateY(12px);
            animation: formItemIn 0.65s cubic-bezier(0.22, 1, 0.36, 1) forwards;
        }

        .login-container.is-entering .login-form-content > .mb-4 { animation-delay: 0.38s; }
        .login-container.is-entering .login-form-content > h3 { animation-delay: 0.46s; }
        .login-container.is-entering .login-form-content > .login-tab-nav { animation-delay: 0.54s; }

        @keyframes formItemIn {
            to { opacity: 1; transform: none; }
        }

        .login-container:not(.is-entering) .login-form-content > .mb-4,
        .login-container:not(.is-entering) .login-form-content > h3,
        .login-container:not(.is-entering) .login-form-content > .login-tab-nav {
            opacity: 1;
            transform: none;
        }

        .back-link {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
        }

        .back-link:hover {
            color: var(--primary-navy);
            transform: translateX(-5px);
        }

        .login-panel.login-form h3 {
            color: #0f172a;
            font-weight: 700;
            font-size: 1.45rem;
            margin-bottom: 0.35rem !important;
        }

        .login-pane-title {
            font-size: 0.88rem;
            color: #64748b;
            margin-bottom: 1.25rem;
            line-height: 1.5;
        }

        .form-label {
            color: #1e293b;
            font-weight: 600;
            font-size: 0.88rem;
            margin-bottom: 0.45rem;
        }

        .form-label i {
            color: #2563eb;
        }

        .form-control {
            box-sizing: border-box;
            width: 100%;
            line-height: 1.5;
            min-height: 2.875rem;
            border: 1.5px solid #e2e8f0;
            border-radius: 10px;
            padding: 0.72rem 1rem;
            color: #0f172a;
            background: #f8fafc;
            transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
        }

        .form-control::placeholder {
            color: #94a3b8;
        }

        .form-control:focus {
            border-color: #2563eb;
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .form-check-label {
            color: #475569;
            font-size: 0.86rem;
        }

        .login-link {
            color: #2563eb;
            text-decoration: none;
            font-weight: 500;
            font-size: 0.86rem;
            transition: color 0.2s;
        }

        .login-link:hover {
            color: #1e3a5f;
        }

        .login-form-hint {
            font-size: 0.78rem;
            color: #64748b;
            margin-top: 0.35rem;
            line-height: 1.45;
        }

        .login-form-hint i {
            color: #2563eb;
        }

        .login-form-footer {
            text-align: center;
            margin-top: 1.25rem;
            font-size: 0.86rem;
            color: #64748b;
        }

        .login-form-footer a {
            color: #2563eb;
            font-weight: 600;
            text-decoration: none;
        }

        .login-form-footer a:hover {
            color: #1e3a5f;
        }

        .login-form-meta {
            text-align: center;
            margin-top: 0.75rem;
            font-size: 0.76rem;
            color: #64748b;
        }

        .login-form-meta i {
            color: #10b981;
        }

        .login-pane-divider {
            border: none;
            border-top: 1px solid #e2e8f0;
            margin: 0 0 1.25rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
            border: none;
            border-radius: 10px;
            padding: 0.75rem;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
        }

        .btn-outline-secondary {
            border: 2px solid #e5e7eb;
            border-left: none;
            border-radius: 0 10px 10px 0;
        }

        .input-group {
            width: 100%;
            flex-wrap: nowrap;
        }

        .input-group .form-control {
            flex: 1 1 auto;
            width: 1%;
            min-width: 0;
            border-radius: 10px 0 0 10px;
        }

        .input-group .btn {
            flex-shrink: 0;
        }
        
        /* Estilos para validaciones de seguridad */
        .form-control.is-invalid {
            border-color: #dc3545;
            box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
        }
        
        .security-alert {
            border-left: 4px solid #dc3545;
            background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(220, 53, 69, 0.05) 100%);
        }
        
        .security-alert .fas {
            color: #dc3545;
        }

        /* ── Login tabs ──────────────────────────────────────── */
        .login-tab-nav {
            display: flex;
            gap: 6px;
            margin-bottom: 18px;
            position: relative;
            padding: 4px;
            background: #f1f5f9;
            border-radius: 12px;
            border: 1px solid #e2e8f0;
        }

        .login-tab-indicator {
            position: absolute;
            top: 4px;
            bottom: 4px;
            left: 4px;
            width: calc(50% - 3px);
            border-radius: 9px;
            background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
            transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
            z-index: 0;
        }

        .login-tab-nav[data-active="estudiante"] .login-tab-indicator,
        .login-tab-nav:not([data-active="staff"]) .login-tab-indicator {
            transform: translateX(0);
        }

        .login-tab-nav[data-active="staff"] .login-tab-indicator {
            transform: translateX(calc(100% + 6px));
        }

        .login-panes {
            position: relative;
            min-height: 320px;
            overflow: visible;
        }

        .login-pane {
            display: none;
        }

        .login-pane.active {
            display: block;
            opacity: 1;
            transform: none;
            filter: none;
        }

        .login-pane.is-leaving {
            display: block;
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            animation: loginPaneOut 0.3s ease forwards;
        }

        .login-pane.is-entering {
            animation: loginPaneIn 0.35s ease forwards;
        }

        @keyframes loginPaneOut {
            to { opacity: 0; }
        }

        @keyframes loginPaneIn {
            from { opacity: 0; }
            to   { opacity: 1; }
        }

        .login-tab-btn {
            flex: 1;
            padding: .58rem .5rem;
            border: none;
            background: transparent;
            border-radius: 9px;
            font-size: .83rem;
            font-weight: 600;
            color: #64748b;
            cursor: pointer;
            transition: color 0.35s ease;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .login-tab-btn.active {
            color: #fff;
        }

        .login-tab-btn:not(.active):hover {
            color: #1e3a5f;
        }

        .login-pane.active.is-visible:not(.is-entering) {
            animation: none;
        }

        @media (prefers-reduced-motion: reduce) {
            .login-container,
            .login-brand-slide,
            .login-form-slide,
            .login-panel,
            .logo,
            .logo::before,
            .logo::after,
            .login-glow-wrap::before,
            .login-glow-wrap::after,
            .login-sparkle,
            body::before,
            .login-container::after,
            .login-tab-indicator,
            .login-pane,
            .login-brand-content > *,
            .login-form-content > * {
                animation: none !important;
                transition: none !important;
            }
            .login-glow-wrap::after {
                opacity: 0.7;
                transform: none;
            }
            .login-container {
                opacity: 1;
                transform: none;
            }
            .login-pane.active {
                opacity: 1;
                transform: none;
                filter: none;
            }
        }

        @media (max-width: 992px) {
            .login-panel.login-brand,
            .login-panel.login-form {
                padding: 2rem 1.5rem;
            }
            .login-panel.login-brand h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .login-glow-wrap::after {
                inset: -14px;
            }
            .login-glow-wrap::before {
                animation-duration: 14s;
            }
            .login-sparkle {
                width: 3px;
                height: 3px;
            }
            .login-container {
                min-height: auto;
            }
            .login-brand-slide,
            .login-form-slide {
                position: relative;
                width: 100%;
                height: auto;
                left: auto;
                transform: none !important;
                transition: none;
            }
            .login-container {
                display: flex;
                flex-direction: column;
            }
            .login-container[data-tab="estudiante"] .login-brand-slide { order: 1; }
            .login-container[data-tab="estudiante"] .login-form-slide { order: 2; }
            .login-container[data-tab="staff"] .login-form-slide { order: 1; }
            .login-container[data-tab="staff"] .login-brand-slide { order: 2; }
            .login-panel {
                width: 100%;
                height: auto;
            }
            .login-container[data-tab="estudiante"] .login-panel.login-brand,
            .login-container[data-tab="estudiante"] .login-panel.login-form,
            .login-container[data-tab="staff"] .login-panel.login-brand,
            .login-container[data-tab="staff"] .login-panel.login-form {
                border-radius: 0;
                border-left: none;
                border-right: none;
            }
            .login-container[data-tab="estudiante"] .login-panel.login-brand {
                border-radius: 20px 20px 0 0;
            }
            .login-container[data-tab="estudiante"] .login-panel.login-form {
                border-radius: 0 0 20px 20px;
                border-top: 1px solid #e2e8f0;
            }
            .login-container[data-tab="staff"] .login-panel.login-form {
                border-radius: 20px 20px 0 0;
            }
            .login-container[data-tab="staff"] .login-panel.login-brand {
                border-radius: 0 0 20px 20px;
                border-top: 1px solid rgba(255, 255, 255, 0.15);
            }
            .login-panel.login-brand {
                padding: 2rem 1.25rem 1.75rem;
            }
            .login-panel.login-form {
                padding: 1.75rem 1.25rem 2rem;
            }
            .login-panel.login-brand .login-desc {
                font-size: 0.88rem;
                margin-bottom: 1rem;
            }
            .login-icons {
                gap: 0.75rem;
            }
            .login-icons i {
                font-size: 1.35rem !important;
            }
            .login-tab-btn {
                font-size: 0.76rem;
                padding: 0.52rem 0.35rem;
            }
            .login-tab-btn i {
                display: block;
                margin: 0 auto 0.2rem !important;
                font-size: 0.9rem;
            }
            .login-panes {
                min-height: auto;
            }
            .login-pane-title {
                font-size: 0.82rem;
            }
            .btn-primary {
                padding: 0.7rem;
            }
        }

        @media (max-width: 420px) {
            .main {
                padding: 10px;
            }
            .login-glow-wrap {
                border-radius: 22px;
            }
            .login-container {
                border-radius: 20px;
            }
            .login-panel.login-brand h2 {
                font-size: 1.3rem;
            }
            .login-subtitle {
                font-size: 0.92rem !important;
            }
            .login-panel.login-form h3 {
                font-size: 1.2rem;
            }
            .logo::after {
                inset: -18px;
            }
        }