:root {
    --idp-red: #e8003a;
    --idp-red-hover: #c40032;
    --idp-red-focus: rgba(232, 0, 58, 0.18);
    --idp-bg-top: #e0e0e0;
    --idp-bg-mid: #f5f5f5;
    --idp-card: #ebebeb;
    --idp-surface: #ffffff;
    --idp-border: #c8c8c8;
    --idp-border-focus: #a8a8a8;
    --idp-text: #1a1a1a;
    --idp-muted: #4a4a4a;
    --idp-placeholder: #9a9a9a;
    --idp-link: #2a2a2a;
    --idp-message-error-bg: #fff8e1;
    --idp-message-error-border: #e6c84a;
    --idp-message-info-bg: #e8f2fc;
    --idp-message-info-border: #5b9bd5;
    --idp-radius: 4px;
    --idp-card-width: 400px;
    --idp-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --idp-duration: 0.22s;

    /* Espaciado y tipografía fluidos */
    --idp-shell-pad-x: clamp(1rem, 4vw, 1.75rem);
    --idp-shell-pad-y: clamp(1.25rem, 5vh, 2.5rem);
    --idp-card-pad-x: clamp(1.25rem, 5vw, 2.25rem);
    --idp-card-pad-y: clamp(1.75rem, 6vh, 2.75rem);
    --idp-font-body: clamp(0.875rem, 2.5vw, 0.9375rem);
    --idp-font-small: clamp(0.75rem, 2.2vw, 0.8125rem);
    --idp-font-lead: clamp(0.8125rem, 2.8vw, 0.875rem);
    --idp-font-heading: clamp(1rem, 3.5vw, 1.125rem);
    --idp-font-code: clamp(1.125rem, 4.5vw, 1.375rem);
    --idp-logo-max: clamp(160px, 52vw, 220px);
}

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

body.idp-body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    font-family: "Segoe UI", Inter, Roboto, system-ui, -apple-system, sans-serif;
    font-size: var(--idp-font-body);
    color: var(--idp-text);
    background: linear-gradient(
        180deg,
        var(--idp-bg-top) 0%,
        var(--idp-bg-mid) 45%,
        var(--idp-bg-mid) 55%,
        var(--idp-bg-top) 100%
    );
    -webkit-font-smoothing: antialiased;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

.idp-shell {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding:
        calc(var(--idp-shell-pad-y) + env(safe-area-inset-top, 0px))
        calc(var(--idp-shell-pad-x) + env(safe-area-inset-right, 0px))
        calc(var(--idp-shell-pad-y) + env(safe-area-inset-bottom, 0px))
        calc(var(--idp-shell-pad-x) + env(safe-area-inset-left, 0px));
}

.idp-main {
    width: 100%;
    max-width: min(var(--idp-card-width), 100%);
}

.idp-card {
    background: var(--idp-card);
    padding:
        var(--idp-card-pad-y)
        var(--idp-card-pad-x)
        calc(var(--idp-card-pad-y) * 0.85);
    animation: idp-fade-in 0.45s var(--idp-ease);
}

@keyframes idp-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Logo ── */

.idp-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 0 clamp(1.25rem, 4vh, 2rem);
}

.idp-logo-img {
    display: block;
    width: 100%;
    max-width: var(--idp-logo-max);
    height: auto;
    transition: opacity var(--idp-duration) var(--idp-ease);
}

.idp-card:hover .idp-logo-img {
    opacity: 0.92;
}

/* ── Tipografía ── */

.idp-card h1 {
    margin: 0 0 0.75rem;
    font-size: var(--idp-font-heading);
    font-weight: 600;
    text-align: center;
}

.idp-lead {
    margin: 0 0 clamp(1rem, 3vh, 1.5rem);
    color: var(--idp-muted);
    font-size: var(--idp-font-lead);
    line-height: 1.55;
    text-align: left;
    overflow-wrap: break-word;
}

.idp-lead strong {
    color: var(--idp-text);
    font-weight: 600;
}

/* ── Campos ── */

.idp-field {
    margin-bottom: 0.875rem;
}

.idp-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;
}

.idp-field input[type="email"],
.idp-field input[type="password"],
.idp-field input[type="text"] {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.6875rem 0.875rem;
    border: 1px solid var(--idp-border);
    border-radius: var(--idp-radius);
    background: var(--idp-surface);
    font-size: var(--idp-font-body);
    color: var(--idp-text);
    transition:
        border-color var(--idp-duration) var(--idp-ease),
        box-shadow var(--idp-duration) var(--idp-ease),
        background-color var(--idp-duration) var(--idp-ease);
}

.idp-field input::placeholder {
    color: var(--idp-placeholder);
}

.idp-field input:hover {
    border-color: var(--idp-border-focus);
}

.idp-field input:focus {
    outline: none;
    border-color: var(--idp-red);
    box-shadow: 0 0 0 3px var(--idp-red-focus);
}

.idp-validation {
    display: block;
    margin-top: 0.375rem;
    color: var(--idp-red);
    font-size: var(--idp-font-small);
    overflow-wrap: break-word;
}

/* ── reCAPTCHA ── */

.idp-recaptcha {
    margin: 1rem 0 1.25rem;
    overflow-x: auto;
    overflow-y: hidden;
}

.idp-recaptcha .g-recaptcha {
    transform-origin: top left;
}

.idp-recaptcha iframe {
    display: block;
}

/* ── Botones ── */

.idp-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.idp-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 2.75rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--idp-radius);
    font-size: var(--idp-font-body);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition:
        background-color var(--idp-duration) var(--idp-ease),
        color var(--idp-duration) var(--idp-ease),
        transform var(--idp-duration) var(--idp-ease),
        box-shadow var(--idp-duration) var(--idp-ease);
}

.idp-button--primary {
    background: var(--idp-red);
    color: #fff;
}

.idp-button--primary:hover {
    background: var(--idp-red-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(232, 0, 58, 0.28);
}

.idp-button--primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.idp-button--ghost {
    background: transparent;
    color: var(--idp-link);
    border: 1px solid var(--idp-border);
}

.idp-button--ghost:hover {
    border-color: var(--idp-border-focus);
    background: rgba(255, 255, 255, 0.45);
}

/* ── Enlaces ── */

.idp-links {
    margin-top: clamp(1rem, 3vh, 1.5rem);
    text-align: center;
}

.idp-links a {
    color: var(--idp-link);
    font-size: var(--idp-font-lead);
    text-decoration: none;
    transition: color var(--idp-duration) var(--idp-ease);
}

.idp-links a:hover {
    color: var(--idp-red);
}

/* ── Alertas y cuadros de mensaje ── */

.idp-alert {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--idp-radius);
    font-size: var(--idp-font-lead);
    line-height: 1.5;
    overflow-wrap: break-word;
    animation: idp-fade-in 0.35s var(--idp-ease);
}

.idp-alert--info {
    color: var(--idp-text);
    background: var(--idp-message-info-bg);
    border: 1px solid var(--idp-message-info-border);
}

.idp-alert--error {
    color: var(--idp-red);
    background: var(--idp-message-error-bg);
    border: 1px solid var(--idp-message-error-border);
}

.idp-validation.validation-summary-errors {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--idp-radius);
    font-size: var(--idp-font-lead);
    line-height: 1.5;
    overflow-wrap: break-word;
    background: var(--idp-message-error-bg);
    border: 1px solid var(--idp-message-error-border);
    color: var(--idp-red);
    list-style-position: inside;
}

.idp-validation.validation-summary-errors ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* ── Código 2FA ── */

.idp-code-input {
    letter-spacing: clamp(0.15em, 2.5vw, 0.4em);
    text-align: center;
    font-size: var(--idp-font-code);
    font-weight: 600;
    padding-left: clamp(0.25em, 2vw, 0.4em);
}

/* ── Panel sesión ── */

.idp-session-email {
    text-align: center;
    font-size: var(--idp-font-body);
    margin-bottom: clamp(1rem, 3vh, 1.5rem);
    overflow-wrap: anywhere;
}

.idp-session-email strong {
    display: block;
    margin-top: 0.25rem;
    font-size: var(--idp-font-heading);
}

.idp-session-email-detail {
    display: block;
    margin-top: 0.35rem;
    color: var(--idp-muted);
    font-size: 0.95em;
}

/* ── Pantallas muy pequeñas (≤320px) ── */

@media (max-width: 320px) {
    :root {
        --idp-card-pad-x: 1rem;
    }
}

/* ── Móvil (≤440px) ── */

@media (max-width: 440px) {
    .idp-code-input {
        letter-spacing: 0.35em;
    }
}

/* ── Tablet (≥768px) ── */

@media (min-width: 768px) {
    :root {
        --idp-card-width: 420px;
    }

    .idp-shell {
        justify-content: center;
    }
}

/* ── Landscape en móvil ── */

@media (max-height: 500px) and (orientation: landscape) {
    .idp-shell {
        justify-content: flex-start;
        padding-top: calc(1rem + env(safe-area-inset-top, 0px));
        padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
    }

    .idp-logo {
        margin-bottom: 1rem;
    }

    :root {
        --idp-logo-max: 140px;
        --idp-card-pad-y: 1.25rem;
    }
}

/* ── Reducir movimiento ── */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .idp-card,
    .idp-alert {
        animation: none;
    }

    .idp-button--primary:hover {
        transform: none;
    }
}