:root {
    --qr-bg: #f5f5f9;
    --qr-card-bg: #ffffff;
    --qr-border-radius: 18px;
    --qr-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
    --qr-primary: #111827;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, #f1f5ff 0, #f9fafb 40%, #f3f4f6 100%);
    color: #111827;
}

/* Página general */

.qr-page header .qr-title {
    font-size: clamp(1.7rem, 2.5vw, 2.1rem);
    font-weight: 700;
}

.qr-page header .qr-subtitle {
    font-size: 0.95rem;
    color: #6b7280;
}

/* Cards */

.qr-card {
    background: var(--qr-card-bg);
    border-radius: var(--qr-border-radius);
    padding: 1.5rem 1.6rem;
    box-shadow: var(--qr-shadow);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

@media (min-width: 992px) {
    .qr-card {
        padding: 1.7rem 2rem;
    }
}

.qr-card-header {
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding-bottom: 0.9rem;
}

.qr-card-title {
    font-size: 1rem;
    font-weight: 600;
}

.qr-icon {
    width: 32px;
    height: 32px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef2ff;
    color: var(--qr-primary);
    font-size: 18px;
}

/* Formulario */

.form-label {
    font-weight: 500;
    font-size: 0.88rem;
}

.form-text {
    font-size: 0.78rem;
}

.form-control,
.form-control:focus,
.form-range {
    box-shadow: none !important;
}

/* Colores */

.qr-color-wrapper input[type="color"] {
    max-width: 44px;
    border-radius: 0.75rem;
    border: 1px solid #e5e7eb;
    background: #fff;
    cursor: pointer;
}

.qr-color-wrapper input[type="text"] {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Vista previa */

.qr-preview {
    background: #f9fafb;
    border-radius: 1.25rem;
    padding: 1.5rem;
}

.qr-preview-inner {
    padding: 0.75rem;
    border-radius: 1rem;
    background: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    min-height: 180px;
}

.qr-preview-inner canvas,
.qr-preview-inner svg {
    max-width: 100%;
    height: auto;
}

/* Botones */

.btn {
    border-radius: 999px;
    padding-inline: 1.4rem;
    font-size: 0.85rem;
}

.btn-dark {
    background-color: #111827;
    border-color: #111827;
}

.btn-dark:hover {
    background-color: #020617;
    border-color: #020617;
}

/* Tip */

.qr-tip {
    border-radius: 999px;
    background: #f9fafb;
    padding: 0.6rem 1rem;
}

/* Footer */

footer {
    border-top: 1px solid rgba(226, 232, 240, 0.8);
}

/* Responsive extras */

@media (max-width: 767.98px) {
    .qr-card {
        border-radius: 1.25rem;
        padding: 1.25rem 1.25rem;
    }

    .qr-preview {
        padding: 1.1rem;
    }
}

/* Overlay anti-adblock */

.adblock-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1.5rem;
}

.adblock-overlay.d-none {
    display: none;
}

.adblock-box {
    max-width: 480px;
    width: 100%;
    background: #ffffff;
    border-radius: 1.5rem;
    padding: 1.75rem 1.75rem 1.5rem;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.4);
    text-align: center;
}

.adblock-box h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
}

.adblock-box p {
    font-size: 0.95rem;
    color: #4b5563;
}

/* Páginas de texto (políticas) */

.page-wrapper {
    max-width: 840px;
    margin: 0 auto;
}

.page-header-title {
    font-size: 1.6rem;
    font-weight: 700;
}

.page-lead {
    font-size: 0.98rem;
    color: #4b5563;
}