/* ============================================================================
   IMPULSA TEC — UI: base y componentes
   ============================================================================
   Requiere tokens.css cargado antes.
   Mobile-first: los estilos base son de movil; los @media (min-width) amplian.
   Breakpoints unicos en todo el sitio: 640px y 1024px.
   ============================================================================ */

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

/* El [hidden] del navegador es display:none, pero pierde contra cualquier
   regla de autor que fije display (.btn es inline-flex), asi que el atributo
   se quedaba sin efecto. Con !important, hidden vuelve a significar oculto. */
[hidden] { display: none !important; }

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

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: var(--leading-normal);
    /* Corta el scroll horizontal, bug recurrente en este repo (f77ff33). */
    overflow-x: hidden;
}

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

a {
    color: var(--primary-ink);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover { color: var(--primary-ink-dark); }

/* Foco visible unificado. Sin esto la navegacion con teclado es invisible. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--primary-ink);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.hidden { display: none !important; }

/* Visible solo para lectores de pantalla. Ojo: no vale display:none ni
   visibility:hidden, que lo esconderian tambien del arbol de accesibilidad. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* Utilidades de separacion. Existen para no repetir style="margin-top"
   suelto en el markup; no crecer esta lista mas alla de lo imprescindible. */
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.ml-3 { margin-left: var(--space-3); }
.align-middle { vertical-align: middle; }

/* ============================ TIPOGRAFIA ============================ */

h1, h2, h3, h4 {
    font-weight: 800;
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
    color: var(--text);
    margin: 0 0 var(--space-4);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { margin: 0 0 var(--space-4); }

.text-center { text-align: center; }
.text-muted { color: var(--text-light); }
.sub-text { font-size: var(--text-sm); color: var(--text-light); }
.info-text { font-size: var(--text-sm); color: var(--text-light); }

/* Salto accesible al contenido: visible solo al tabular. */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 200;
    padding: var(--space-3) var(--space-5);
    background: var(--secondary);
    color: var(--white);
    border-radius: 0 0 var(--radius-sm) 0;
    font-weight: 700;
}

.skip-link:focus {
    left: 0;
    color: var(--white);
}

/* ============================ BOTONES ============================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.8rem 1.6rem;
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 700;
    line-height: 1;
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition), background var(--transition),
                color var(--transition), border-color var(--transition),
                box-shadow var(--transition);
    /* Objetivo tactil minimo recomendado. */
    min-height: 44px;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn:disabled,
.btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

/* Solidos: fondo -ink porque llevan texto blanco encima. */
.btn-primary,
.btn-gradient,
.btn-submit {
    background: var(--primary-ink);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-gradient:hover,
.btn-submit:hover:not(:disabled) {
    background: var(--primary-ink-dark);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--primary-ink);
}

.btn-outline:hover {
    border-color: var(--primary-ink);
    background: var(--primary-soft);
    color: var(--primary-ink-dark);
}

.btn-white {
    background: var(--white);
    color: var(--primary-ink);
    box-shadow: var(--shadow-sm);
}

.btn-white:hover {
    background: var(--bg-soft);
    color: var(--primary-ink-dark);
}

/* Contorno para usar sobre fondos oscuros (dentro de .cta-box). */
.btn-outline-light {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--white);
}

.btn-outline-light:hover {
    border-color: var(--white);
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
}

.btn-text,
.btn-ghost {
    background: transparent;
    color: var(--text-light);
    padding: 0.7rem 1rem;
}

.btn-text:hover,
.btn-ghost:hover {
    color: var(--primary-ink);
    background: var(--primary-soft);
}

.btn-danger { background: var(--danger-ink); color: var(--white); }
.btn-success { background: var(--success-ink); color: var(--white); }

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--text-base);
}

.btn-block,
.btn-submit,
.btn-outline-full {
    width: 100%;
}

.btn-outline-full {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 44px;
    padding: 0.9rem 1rem;
    border: 2px solid var(--border-strong);
    border-radius: var(--radius-full);
    background: var(--white);
    color: var(--text);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 700;
    cursor: pointer;
    transition: border-color var(--transition), color var(--transition),
                background var(--transition);
}

.btn-outline-full:hover {
    border-color: var(--primary-ink);
    color: var(--primary-ink);
    background: var(--primary-soft);
}

/* ============================ SPINNER ============================ */

.spinner,
.spinner-small {
    display: inline-block;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

.spinner {
    width: 18px;
    height: 18px;
    margin-right: var(--space-2);
}

.spinner-small { width: 14px; height: 14px; }

/* Spinner suelto sobre fondo claro (estados de carga de pagina). */
.loading-state .spinner {
    width: 42px;
    height: 42px;
    margin: 0 auto var(--space-4);
    display: block;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
}

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

@media (prefers-reduced-motion: reduce) {
    .spinner, .spinner-small { animation-duration: 1.6s; }
}

/* ============================ PILDORAS Y BADGES ============================ */

.small-pill,
.badge,
.badge-hero {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-full);
    background: var(--primary-soft);
    color: var(--primary-ink);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.01em;
}

/* Pildora sobre los subhero calidos: necesita fondo solido para separarse. */
.badge-hero {
    margin-bottom: var(--space-4);
    background: var(--white);
    border: 1px solid var(--border);
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text-light);
}

/* ============================ NAVBAR ============================ */

/* Reserva la altura antes de que public-nav.js inyecte el nav, para que el
   contenido no salte al montarse (CLS). */
[data-nav] { min-height: var(--nav-height); }

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
    border-bottom: 1px solid var(--border);
}

/* El desenfoque va en el pseudo-elemento, no en .navbar.
   backdrop-filter crea bloque contenedor para descendientes position:fixed, y
   eso anclaba el cajon movil al navbar en vez de al viewport: sus 300px fuera
   de pantalla contaban como scroll y las 17 paginas desbordaban en horizontal
   (scrollWidth 675 vs 375). El pseudo-elemento no es ancestro de .nav-links,
   asi que el cajon vuelve a ser fijo respecto al viewport. */
.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(251, 247, 242, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.logo a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-text {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--secondary);
}

.logo .logo-mark { font-size: 1.4rem; line-height: 1; }

/* Movil: cajon lateral oculto. Se despliega con .active desde public-nav.js. */
.nav-links {
    position: fixed;
    top: var(--nav-height);
    right: 0;
    z-index: 99;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    width: min(300px, 82vw);
    height: calc(100vh - var(--nav-height));
    margin: 0;
    padding: var(--space-5);
    list-style: none;
    background: var(--white);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
}

.nav-links.active { transform: translateX(0); }

.nav-links a:not(.btn) {
    display: block;
    padding: var(--space-3) var(--space-2);
    color: var(--text);
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.nav-links a:not(.btn):hover {
    background: var(--primary-soft);
    color: var(--primary-ink);
}

.nav-links a[aria-current="page"] {
    color: var(--primary-ink);
    background: var(--primary-soft);
}

.nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--text);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    transition: border-color var(--transition), color var(--transition);
}

.nav-toggle:hover {
    border-color: var(--primary-ink);
    color: var(--primary-ink);
}

.nav-overlay {
    position: fixed;
    inset: var(--nav-height) 0 0;
    z-index: 98;
    background: rgba(31, 42, 36, 0.42);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.nav-overlay.active { opacity: 1; visibility: visible; }

/* Escritorio: barra horizontal, sin cajon ni overlay. */
@media (min-width: 1024px) {
    .nav-links {
        position: static;
        flex-direction: row;
        align-items: center;
        gap: var(--space-5);
        width: auto;
        height: auto;
        padding: 0;
        background: none;
        border: 0;
        box-shadow: none;
        transform: none;
        overflow: visible;
    }

    .nav-links a:not(.btn) { padding: var(--space-2) 0; background: none; }

    .nav-links a:not(.btn):hover { background: none; color: var(--primary-ink); }

    .nav-links a[aria-current="page"] { background: none; }

    .nav-toggle,
    .nav-overlay { display: none; }
}

/* ============================ FOOTER ============================ */

.footer {
    margin-top: var(--space-10);
    padding: var(--space-10) 0 var(--space-5);
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.78);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.footer-brand h2 {
    margin-bottom: var(--space-3);
    font-size: 1.3rem;
    color: var(--white);
}

.footer-brand p {
    margin: 0;
    font-size: var(--text-sm);
    line-height: 1.6;
    max-width: 34ch;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-6);
}

.link-group h4 {
    margin-bottom: var(--space-3);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.link-group a {
    display: block;
    padding: var(--space-1) 0;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.78);
}

.link-group a:hover { color: var(--white); }

.footer-bottom {
    max-width: var(--container-max);
    margin: var(--space-8) auto 0;
    padding: var(--space-5) var(--space-5) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.62);
}

@media (min-width: 1024px) {
    .footer-content {
        grid-template-columns: 1.2fr 2fr;
        gap: var(--space-10);
    }
}

/* ============================ FORMULARIOS ============================ */

.form-group { margin-bottom: var(--space-5); }

.form-row,
.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 640px) {
    .form-row,
    .form-grid { grid-template-columns: 1fr 1fr; }

    .form-grid .full-width { grid-column: 1 / -1; }
}

.form-field { margin-bottom: var(--space-4); }

.form-label,
.form-field label,
.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text);
}

.required { color: var(--danger-ink); }

.form-input,
.form-field input,
.form-field select,
.form-field textarea,
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--text);
    font-family: inherit;
    font-size: var(--text-base);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field textarea,
.form-group textarea {
    min-height: 130px;
    resize: vertical;
    line-height: 1.6;
}

/* Flecha propia: el select nativo ignora el resto del estilado. */
select.form-input,
.form-field select,
.form-group select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235C6B63' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.form-input:focus,
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus,
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--focus-ring);
}

.form-input::placeholder,
.form-field textarea::placeholder { color: var(--text-light); opacity: 0.75; }

/* .input-error lo aplica el JS de registro/registro-onboarding por campo. */
.form-input.input-error,
.form-field input.input-error { border-color: var(--danger); }

.form-hint {
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-light);
}

/* Oculto hasta que el JS añada .show; si fuera visible por defecto dejaria
   un hueco vacio bajo cada campo. */
.field-error {
    display: none;
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--danger-ink);
}

.field-error.show { display: block; }

.password-wrapper { position: relative; }

.password-wrapper .form-input { padding-right: 3rem; }

.password-toggle {
    position: absolute;
    top: 50%;
    right: 0.5rem;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 0;
    border-radius: var(--radius-sm);
    background: none;
    color: var(--text-light);
    font-size: 1.05rem;
    cursor: pointer;
    transition: color var(--transition), background var(--transition);
}

.password-toggle:hover { color: var(--primary-ink); background: var(--primary-soft); }

/* Contrato con el JS de registro: la barra aparece con .show y el nivel se
   aplica reasignando className a 'password-strength-bar' + .weak/.medium/.strong.
   Los nombres deben ser exactamente esos. */
.password-strength {
    display: none;
    height: 6px;
    margin-top: var(--space-2);
    border-radius: var(--radius-full);
    background: var(--border);
    overflow: hidden;
}

.password-strength.show { display: block; }

.password-strength-bar {
    height: 100%;
    width: 0;
    border-radius: inherit;
    transition: width var(--transition), background var(--transition);
}

.password-strength-bar.weak   { width: 33%; background: var(--danger); }
.password-strength-bar.medium { width: 66%; background: var(--warning); }
.password-strength-bar.strong { width: 100%; background: var(--success); }

.password-requirements {
    margin: var(--space-3) 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: var(--space-1);
}

/* El JS hace classList.toggle('valid') sobre cada <li>. */
.password-requirements li,
.req-item {
    font-size: var(--text-xs);
    color: var(--text-light);
    transition: color var(--transition);
}

.password-requirements li::before,
.req-item::before { content: '✗ '; }

.password-requirements li.valid,
.req-item.valid { color: var(--success-ink); }

.password-requirements li.valid::before,
.req-item.valid::before { content: '✓ '; }

.divider {
    display: flex;
    align-items: center;
    margin: var(--space-5) 0;
    color: var(--text-light);
    font-size: var(--text-sm);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.divider span { padding: 0 var(--space-3); }

/* ============================ ALERTAS ============================ */

/* Contrato con el JS: oculta por defecto, visible al añadir .show.
   Los modificadores son .alert-error / .alert-success (los aplica showAlert). */
.alert {
    display: none;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    /* Los mensajes del backend pueden traer saltos de linea (errores 422). */
    white-space: pre-line;
}

.alert.show { display: flex; }

.alert-error,
.alert.error {
    background: var(--danger-soft);
    border-color: var(--danger);
    color: var(--danger-ink);
}

.alert-success,
.alert.success {
    background: var(--success-soft);
    border-color: var(--success);
    color: var(--success-ink);
}

.alert-warning {
    background: var(--warning-soft);
    border-color: var(--warning);
    color: var(--warning-ink);
}

/* Variante de contacto.html: misma semantica, otro nombre. */
.status-msg {
    display: none;
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: pre-line;
}

.status-msg.show { display: block; }

.status-msg.success {
    background: var(--success-soft);
    border-color: var(--success);
    color: var(--success-ink);
}

.status-msg.error {
    background: var(--danger-soft);
    border-color: var(--danger);
    color: var(--danger-ink);
}

/* ============================ TOAST ============================ */

/* Lo crea showToast() en curso-detalle.html: solo asigna clases, el estilo
   vive aqui. Usa los tonos -ink porque lleva texto blanco encima. */
.toast-msg {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    max-width: min(90vw, 460px);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: var(--text-sm);
    font-weight: 600;
    text-align: center;
    box-shadow: var(--shadow-lg);
    opacity: 1;
    transition: opacity var(--transition-slow);
}

.toast-msg.is-leaving { opacity: 0; }

.toast-success { background: var(--success-ink); }
.toast-error { background: var(--danger-ink); }

/* ============================ TARJETAS ============================ */

.card,
.info-card,
.feature-card,
.course-card,
.testimonial-card,
.plan-card,
.step-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition),
                border-color var(--transition);
}

.card-header { margin-bottom: var(--space-4); }
.card-footer { margin-top: var(--space-4); }

/* ============================ ESTADO VACIO ============================ */

.empty-state,
.loading-state-catalog {
    grid-column: 1 / -1;
    padding: var(--space-8) var(--space-5);
    text-align: center;
    color: var(--text-light);
}

.empty-icon { font-size: 2.5rem; margin-bottom: var(--space-3); }

.empty-title {
    margin-bottom: var(--space-2);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
}

.empty-text { margin: 0 0 var(--space-4); font-size: var(--text-sm); }

.empty-state .btn { margin-top: var(--space-2); }