:root {
    --er-primary: #002469;
    --er-primary-dark: #001947;
    --er-primary-soft: #123c8c;

    --er-accent: #fc0e26;
    --er-accent-dark: #c90015;
    --er-accent-rgb: 252, 14, 38;

    --er-white: #ffffff;
    --er-surface: #fefefd;
    --er-soft: #f4f7fb;

    --er-gray-50: #f9fafb;
    --er-gray-100: #f3f4f6;
    --er-gray-200: #e5e7eb;
    --er-gray-300: #d1d5db;
    --er-gray-400: #9ca3af;
    --er-gray-500: #6b7280;
    --er-gray-600: #4b5563;
    --er-gray-700: #374151;
    --er-gray-800: #1f2937;
    --er-gray-900: #111827;

    --er-success: #10b981;
    --er-warning: #f59e0b;
    --er-danger: #ef4444;
    --er-whatsapp: #22c55e;

    --primary: var(--er-primary);
    --primary-dark: var(--er-primary-dark);
    --primary-light: var(--er-primary-soft);
    --primary-rgb: 0, 36, 105;

    --secondary: #e8eefb;
    --secondary-light: #f4f7fb;

    --white: var(--er-white);
    --off-white: var(--er-surface);

    --gray-100: var(--er-gray-100);
    --gray-200: var(--er-gray-200);
    --gray-300: var(--er-gray-300);
    --gray-400: var(--er-gray-400);
    --gray-500: var(--er-gray-500);
    --gray-600: var(--er-gray-600);
    --gray-700: var(--er-gray-700);
    --gray-800: var(--er-gray-800);
    --gray-900: var(--er-gray-900);

    --success: var(--er-success);

    --font-display: Arial, Helvetica, sans-serif;
    --font-body: Arial, Helvetica, sans-serif;

    --er-radius-sm: 10px;
    --er-radius-md: 14px;
    --er-radius-lg: 20px;
    --er-radius-xl: 28px;

    --radius-sm: var(--er-radius-sm);
    --radius-md: var(--er-radius-md);
    --radius-lg: var(--er-radius-lg);
    --radius-xl: var(--er-radius-xl);

    --er-shadow-sm: 0 8px 20px rgba(0, 36, 105, 0.07);
    --er-shadow-md: 0 14px 34px rgba(0, 36, 105, 0.12);
    --er-shadow-lg: 0 24px 60px rgba(0, 36, 105, 0.16);

    --shadow-sm: var(--er-shadow-sm);
    --shadow-md: var(--er-shadow-md);
    --shadow-lg: var(--er-shadow-lg);

    --transition-normal: 0.22s ease;

    --er-header-height: 76px;
    --er-mobile-nav-height: 68px;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--er-font-body, var(--font-body));
    color: var(--er-gray-800);
    background:
        radial-gradient(circle at top left, rgba(0, 36, 105, 0.08), transparent 32%),
        radial-gradient(circle at bottom right, rgba(252, 14, 38, 0.06), transparent 30%),
        linear-gradient(180deg, #fefefd 0%, #f6f8fc 52%, #ffffff 100%);
}

body.vb-login-invite-open {
    overflow: hidden;
}

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

button,
input,
select,
textarea {
    font: inherit;
}

button,
input,
select {
    -webkit-appearance: none;
    appearance: none;
}

button {
    cursor: pointer;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

img {
    display: block;
    max-width: 100%;
}

.er-main {
    min-height: 60vh;
}

.er-container,
.vb-container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.er-container--wide,
.vb-container--wide {
    width: min(1480px, calc(100% - 32px));
    margin: 0 auto;
}

.er-alert,
.vb-alert {
    width: min(920px, calc(100% - 32px));
    margin: 18px auto 0;
    padding: 13px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 16px;
    font-weight: 900;
    box-shadow: var(--er-shadow-sm);
}

.er-alert--success,
.vb-alert--success {
    color: #047857;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.18);
}

.er-alert--warning,
.vb-alert--warning {
    color: #92400e;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.18);
}

.er-kicker,
.vb-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--er-accent);
    font-size: 12px;
    font-weight: 1000;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.er-btn,
.vb-btn {
    min-height: 44px;
    border: 0;
    border-radius: 999px;
    padding: 0 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    color: var(--er-white);
    background: linear-gradient(135deg, var(--er-accent), var(--er-accent-dark));
    font-weight: 1000;
    box-shadow: 0 14px 30px rgba(var(--er-accent-rgb), 0.24);
    transition: var(--transition-normal);
}

.er-btn:hover,
.vb-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 38px rgba(var(--er-accent-rgb), 0.28);
}

.vb-btn--outline {
    color: var(--er-primary);
    background: var(--er-white);
    border: 1px solid rgba(0, 36, 105, 0.14);
    box-shadow: var(--er-shadow-sm);
}

.vb-btn--full {
    width: 100%;
}

.vb-btn--large {
    min-height: 52px;
    padding: 0 22px;
}

/* Toast carrito */
.vb-cart-toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 1400;
    max-width: min(360px, calc(100vw - 32px));
    min-height: 52px;
    padding: 13px 16px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
    background: var(--er-success);
    font-weight: 1000;
    box-shadow: 0 22px 50px rgba(15, 23, 42, 0.24);
    opacity: 0;
    transform: translateY(14px);
    pointer-events: none;
    transition: 0.22s ease;
}

.vb-cart-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.vb-cart-toast.is-error {
    background: var(--er-danger);
}

/* WhatsApp flotante */
.er-whatsapp-float {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 900;
    min-height: 52px;
    padding: 0 18px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #ffffff;
    background: linear-gradient(135deg, #16a34a, #22c55e);
    font-size: 14px;
    font-weight: 1000;
    box-shadow: 0 18px 42px rgba(22, 163, 74, 0.32);
    transition: var(--transition-normal);
}

.er-whatsapp-float:hover {
    transform: translateY(-2px);
    box-shadow: 0 24px 52px rgba(22, 163, 74, 0.38);
}

.er-whatsapp-float i {
    font-size: 22px;
}

/* Modal login invitado */
.vb-login-invite[hidden] {
    display: none !important;
}

.vb-login-invite {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: 18px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.vb-login-invite.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.vb-login-invite__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(17, 24, 39, 0.52);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.vb-login-invite__card {
    position: relative;
    z-index: 2;
    width: min(420px, 100%);
    padding: 26px;
    border-radius: 26px;
    background:
        radial-gradient(circle at top left, rgba(252, 14, 38, 0.10), transparent 38%),
        #ffffff;
    border: 1px solid rgba(0, 36, 105, 0.12);
    box-shadow: 0 28px 70px rgba(17, 24, 39, 0.28);
    text-align: center;
    transform: translateY(14px) scale(0.98);
    transition: transform 0.22s ease;
}

.vb-login-invite.is-visible .vb-login-invite__card {
    transform: translateY(0) scale(1);
}

.vb-login-invite__close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: rgba(0, 36, 105, 0.08);
    color: var(--er-gray-700);
}

.vb-login-invite__icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 16px;
    border-radius: 24px;
    display: grid;
    place-items: center;
    color: #ffffff;
    background: linear-gradient(135deg, var(--er-primary), var(--er-accent));
    font-size: 28px;
    box-shadow: 0 16px 34px rgba(0, 36, 105, 0.22);
}

.vb-login-invite__card strong {
    display: block;
    color: var(--er-gray-900);
    font-size: 22px;
    font-weight: 1000;
    line-height: 1.2;
}

.vb-login-invite__card p {
    margin: 10px 0 20px;
    color: var(--er-gray-600);
    font-size: 14px;
    font-weight: 750;
    line-height: 1.6;
}

.vb-login-invite__actions {
    display: grid;
    gap: 10px;
}

.vb-login-invite__login,
.vb-login-invite__continue {
    width: 100%;
    min-height: 46px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 1000;
}

.vb-login-invite__login {
    border: 0;
    color: #ffffff;
    background: linear-gradient(135deg, var(--er-primary), var(--er-primary-dark));
    box-shadow: 0 14px 30px rgba(0, 36, 105, 0.22);
}

.vb-login-invite__login i {
    color: #ffffff;
}

.vb-login-invite__continue {
    border: 1px solid rgba(0, 36, 105, 0.14);
    background: #ffffff;
    color: var(--er-gray-700);
}

/* Compatibilidad con clases antiguas mínimas */
.vb-empty {
    grid-column: 1 / -1;
    min-height: 260px;
    border: 1px dashed rgba(0, 36, 105, 0.18);
    border-radius: 22px;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 8px;
    text-align: center;
    color: var(--er-gray-500);
    background: #ffffff;
}

.vb-empty i {
    color: var(--er-accent);
    font-size: 42px;
}

.vb-empty strong {
    color: var(--er-gray-900);
    font-size: 20px;
}

.vb-loader[hidden],
.vb-products-end[hidden] {
    display: none !important;
}

.vb-loader i,
.er-loader i,
.vb-btn i.fa-spinner {
    animation: erSpin 0.8s linear infinite;
}

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

/* Safari/iOS preventivo */
.er-whatsapp-float,
.vb-login-invite,
.vb-login-invite__card,
.vb-login-invite__backdrop,
.vb-login-invite__login,
.vb-login-invite__continue,
.vb-login-invite__close {
    -webkit-tap-highlight-color: transparent;
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
}

@media (max-width: 760px) {
    body {
        padding-bottom: calc(var(--er-mobile-nav-height) + env(safe-area-inset-bottom));
    }

    .er-container,
    .vb-container,
    .er-container--wide,
    .vb-container--wide {
        width: min(100% - 20px, 1480px);
    }

    .er-alert,
    .vb-alert {
        width: min(100% - 20px, 920px);
        margin-top: 12px;
        padding: 12px 14px;
        border-radius: 14px;
        font-size: 13px;
    }

    .er-whatsapp-float {
        right: 14px;
        bottom: calc(var(--er-mobile-nav-height) + 14px + env(safe-area-inset-bottom));
        width: 54px;
        height: 54px;
        min-height: 54px;
        padding: 0;
        border-radius: 999px;
    }

    .er-whatsapp-float span {
        display: none;
    }

    .vb-cart-toast {
        right: 12px;
        left: 12px;
        bottom: calc(var(--er-mobile-nav-height) + 12px + env(safe-area-inset-bottom));
        max-width: none;
    }

    .vb-login-invite {
        place-items: center;
        padding: 16px;
    }

    .vb-login-invite__card {
        width: min(100%, 360px);
        padding: 24px 18px 18px;
        border-radius: 24px;
    }

    .vb-login-invite__icon {
        width: 58px;
        height: 58px;
        border-radius: 20px;
        font-size: 24px;
    }

    .vb-login-invite__card strong {
        font-size: 20px;
    }

    .vb-login-invite__card p {
        font-size: 13px;
    }
}