/* =====================================================================
   Proyecto Crisol - Confirmación de asistencia
   Estilos: oscuro, elegante, introspectivo. Sin dependencias externas.
   ===================================================================== */

:root {
    --bg-principal: #080B0D;
    --bg-secundario: #0B2430;
    --dorado: #C59B52;
    --dorado-claro: #E8D39C;
    --texto-principal: #F4F1E8;
    --texto-secundario: #B9C1C5;
    --error: #C97B7B;
    --error-bg: rgba(201, 123, 123, 0.12);
    --exito: #C59B52;
    --campo-bg: rgba(244, 241, 232, 0.06);
    --campo-bg-focus: rgba(244, 241, 232, 0.1);
    --borde: rgba(197, 155, 82, 0.28);
    --borde-focus: rgba(197, 155, 82, 0.75);
    --sombra: rgba(0, 0, 0, 0.45);
    --radio: 10px;
    --max-ancho: 1200px;
    --fuente-sans: "Segoe UI", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    --fuente-serif: "Georgia", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
}

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

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

body {
    margin: 0;
    background: var(--bg-principal);
    color: var(--texto-principal);
    font-family: var(--fuente-sans);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--dorado-claro);
}

h1, h2 {
    font-weight: 400;
    letter-spacing: 0.01em;
}

.pagina {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ---------------------------------------------------------------------
   Hero / portada con la invitación
   --------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 62vh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    background: var(--bg-secundario);
}

.hero__imagen {
    position: absolute;
    inset: 0;
    background-image: url("../img/invitacion.png");
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
}

.hero__degradado {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(8, 11, 13, 0.05) 0%,
        rgba(8, 11, 13, 0.35) 55%,
        var(--bg-principal) 100%
    );
}

.hero__contenido {
    position: relative;
    z-index: 1;
    padding: 2rem 1.25rem 2.25rem;
    max-width: 720px;
}

.hero__proyecto {
    margin: 0 0 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.72rem;
    color: var(--dorado-claro);
}

.hero__titulo {
    margin: 0 0 0.85rem;
    font-size: 1.6rem;
    line-height: 1.3;
    color: var(--texto-principal);
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.6);
}

.hero__frase {
    margin: 0;
    color: var(--texto-secundario);
    font-family: var(--fuente-serif);
    font-style: italic;
    font-size: 1rem;
    max-width: 46ch;
}

/* ---------------------------------------------------------------------
   Contenido principal
   --------------------------------------------------------------------- */
.contenido {
    flex: 1;
    padding: 2rem 1.25rem 3rem;
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
}

.info-evento {
    border: 1px solid var(--borde);
    background: linear-gradient(160deg, rgba(197, 155, 82, 0.06), transparent 60%);
    border-radius: var(--radio);
    padding: 1.25rem 1.25rem 1.4rem;
    margin-bottom: 2rem;
}

.info-evento__titulo {
    margin: 0 0 0.9rem;
    font-size: 1rem;
    color: var(--dorado-claro);
    letter-spacing: 0.04em;
}

.info-evento__lista {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.55rem;
}

.info-evento__lista li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid rgba(185, 193, 197, 0.12);
    padding-bottom: 0.55rem;
    font-size: 0.95rem;
}

.info-evento__lista li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.info-evento__etiqueta {
    color: var(--texto-secundario);
}

.info-evento__valor {
    color: var(--texto-principal);
    text-align: right;
    font-weight: 600;
}

.info-evento__nota {
    margin: 0.9rem 0 0;
    color: var(--texto-secundario);
    font-size: 0.85rem;
}

/* ---------------------------------------------------------------------
   Formulario
   --------------------------------------------------------------------- */
.formulario-seccion {
    margin-bottom: 2.5rem;
}

.alerta {
    border-radius: var(--radio);
    padding: 0.9rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.92rem;
}

.alerta--error {
    background: var(--error-bg);
    border: 1px solid rgba(201, 123, 123, 0.4);
    color: var(--error);
}

.formulario {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
}

.campo-honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.campo {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.campo label {
    font-size: 0.9rem;
    color: var(--texto-secundario);
    letter-spacing: 0.01em;
}

.campo__ayuda {
    margin: -0.15rem 0 0;
    font-size: 0.8rem;
    color: var(--texto-secundario);
    opacity: 0.85;
}

.campo input[type="text"],
.campo input[type="password"] {
    font-family: inherit;
    font-size: 1rem;
    color: var(--texto-principal);
    background: var(--campo-bg);
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 0.85rem 0.95rem;
    min-height: 44px;
    width: 100%;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.campo input[type="text"]::placeholder,
.campo input[type="password"]::placeholder {
    color: rgba(185, 193, 197, 0.55);
}

.campo input[type="text"]:focus,
.campo input[type="password"]:focus {
    outline: none;
    background: var(--campo-bg-focus);
    border-color: var(--borde-focus);
    box-shadow: 0 0 0 3px rgba(197, 155, 82, 0.18);
}

.campo input[aria-invalid="true"] {
    border-color: var(--error);
}

.campo__error {
    margin: 0;
    color: var(--error);
    font-size: 0.85rem;
    display: flex;
    align-items: flex-start;
    gap: 0.4rem;
}

.campo__error::before {
    content: "⚠";
    line-height: 1;
    flex-shrink: 0;
}

.campo--checkbox {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.65rem;
    padding-top: 0.25rem;
}

.campo--checkbox input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    min-width: 24px;
    margin: 0.5rem 0 0;
    border-radius: 6px;
    border: 1.5px solid var(--borde);
    background: var(--campo-bg);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.campo--checkbox input[type="checkbox"]:checked {
    background: linear-gradient(135deg, var(--dorado-claro), var(--dorado));
    border-color: var(--dorado);
}

.campo--checkbox input[type="checkbox"]:checked::after {
    content: "";
    position: absolute;
    left: 8px;
    top: 4px;
    width: 6px;
    height: 11px;
    border: solid #1a1406;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.campo--checkbox input[aria-invalid="true"] {
    border-color: var(--error);
}

/* Área táctil ampliada: la etiqueta también activa la casilla y ocupa
   al menos 44px de alto, cumpliendo el tamaño mínimo recomendado. */
.campo--checkbox label {
    color: var(--texto-principal);
    font-size: 0.92rem;
    padding: 0.5rem 0;
    min-height: 44px;
    display: flex;
    align-items: center;
    flex: 1;
    cursor: pointer;
}

.campo--checkbox .campo__error {
    flex-basis: 100%;
}

.boton-enviar {
    appearance: none;
    border: none;
    border-radius: var(--radio);
    background: linear-gradient(135deg, var(--dorado-claro), var(--dorado));
    color: #1a1406;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.95rem 1.5rem;
    min-height: 48px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    box-shadow: 0 8px 24px rgba(197, 155, 82, 0.22);
    transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
}

.boton-enviar:hover {
    box-shadow: 0 10px 28px rgba(197, 155, 82, 0.3);
}

.boton-enviar:active {
    transform: translateY(1px);
}

.boton-enviar:focus-visible {
    outline: 2px solid var(--dorado-claro);
    outline-offset: 3px;
}

.boton-enviar:disabled {
    opacity: 0.65;
    cursor: default;
    box-shadow: none;
}

.boton-enviar__spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid rgba(26, 20, 6, 0.35);
    border-top-color: #1a1406;
    animation: girar 0.8s linear infinite;
    display: none;
}

.boton-enviar[data-enviando="true"] .boton-enviar__spinner {
    display: inline-block;
}

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

.formulario__aviso {
    margin: 0;
    color: var(--texto-secundario);
    font-size: 0.8rem;
    line-height: 1.5;
}

.estado-envio {
    min-height: 1px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.referencia-crisol {
    text-align: center;
    color: var(--texto-secundario);
    font-size: 0.85rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(185, 193, 197, 0.12);
}

.referencia-crisol strong {
    color: var(--dorado-claro);
    font-weight: 600;
}

/* ---------------------------------------------------------------------
   Pantalla de confirmación
   --------------------------------------------------------------------- */
.pagina--confirmacion {
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background:
        radial-gradient(ellipse at top, rgba(197, 155, 82, 0.08), transparent 60%),
        var(--bg-principal);
}

.tarjeta-confirmacion {
    width: 100%;
    max-width: 480px;
    margin: 2rem auto;
    text-align: center;
    background: linear-gradient(160deg, rgba(197, 155, 82, 0.08), rgba(11, 36, 48, 0.4));
    border: 1px solid var(--borde);
    border-radius: 16px;
    padding: 2.25rem 1.75rem;
    box-shadow: 0 20px 50px var(--sombra);
}

.tarjeta-confirmacion__proyecto {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.7rem;
    color: var(--dorado-claro);
    margin: 0 0 1.25rem;
}

.tarjeta-confirmacion__icono {
    color: var(--dorado);
    margin: 0 auto 1rem;
    width: 48px;
}

.tarjeta-confirmacion__titulo {
    font-size: 1.4rem;
    margin: 0 0 0.6rem;
    color: var(--texto-principal);
}

.tarjeta-confirmacion__mensaje {
    color: var(--texto-secundario);
    margin: 0 0 1.5rem;
}

.tarjeta-confirmacion__detalles {
    list-style: none;
    margin: 0 0 1.75rem;
    padding: 1rem 0;
    border-top: 1px solid rgba(185, 193, 197, 0.15);
    border-bottom: 1px solid rgba(185, 193, 197, 0.15);
    display: grid;
    gap: 0.5rem;
}

.tarjeta-confirmacion__detalles li {
    display: flex;
    justify-content: space-between;
    font-size: 0.92rem;
}

.detalle__etiqueta {
    color: var(--texto-secundario);
}

.detalle__valor {
    color: var(--texto-principal);
    font-weight: 600;
}

.tarjeta-confirmacion__enlace {
    margin: 0 0 1rem;
}

.boton-enviar--enlace {
    width: 100%;
    margin-top: 0.25rem;
}

.tarjeta-confirmacion__referencia {
    margin: 1.5rem 0 0;
    color: var(--texto-secundario);
    font-size: 0.8rem;
}

.tarjeta-confirmacion__referencia strong {
    color: var(--dorado-claro);
}

/* ---------------------------------------------------------------------
   Escritorio: composición de dos columnas
   --------------------------------------------------------------------- */
@media (min-width: 1024px) {
    .pagina:not(.pagina--confirmacion) {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        max-width: var(--max-ancho);
        margin: 0 auto;
        min-height: 100vh;
    }

    .hero {
        position: sticky;
        top: 0;
        height: 100vh;
        min-height: 100vh;
    }

    .hero__degradado {
        background: linear-gradient(
            to top,
            rgba(8, 11, 13, 0.15) 0%,
            rgba(8, 11, 13, 0.05) 40%,
            transparent 70%
        ),
        linear-gradient(
            to right,
            transparent 60%,
            var(--bg-principal) 100%
        );
    }

    .hero__contenido {
        padding: 3rem;
        max-width: 90%;
    }

    .hero__titulo {
        font-size: 2rem;
    }

    .contenido {
        max-width: 560px;
        padding: 4rem 3rem 4rem 2.5rem;
        margin: 0;
    }
}

/* ---------------------------------------------------------------------
   Accesibilidad / preferencias del usuario
   --------------------------------------------------------------------- */
:focus-visible {
    outline: 2px solid var(--dorado-claro);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}