/* ============================================
   UPANA Formulario de Inscripciones 2026
   Diseño mejorado - v1.3.1
   ============================================ */

/* --- Variables de diseño --- */
:root {
    --upana-primary: #1a3a5c;
    --upana-primary-hover: #264d7a;
    --upana-accent: #c8a74e;
    --upana-accent-hover: #b8953a;
    --upana-bg: #f8f9fb;
    --upana-card-bg: #ffffff;
    --upana-text: #2d3748;
    --upana-text-light: #5a6c7d;
    --upana-border: #e2e8f0;
    --upana-border-focus: #1a3a5c;
    --upana-success: #38a169;
    --upana-error: #e53e3e;
    --upana-error-bg: #fff5f5;
    --upana-success-bg: #f0fff4;
    --upana-radius: 8px;
    --upana-radius-sm: 6px;
    --upana-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --upana-shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.04);
    --upana-shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.05);
    --upana-transition: 0.2s ease;
    --upana-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* --- Contenedor principal --- */
.upana-form-wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 2.5rem;
    background: var(--upana-card-bg);
    border-radius: 16px;
    box-shadow: var(--upana-shadow-lg);
    font-family: var(--upana-font);
    color: var(--upana-text);
    position: relative;
    overflow: hidden;
}

/* Borde superior decorativo */
.upana-form-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--upana-primary) 0%, var(--upana-accent) 100%);
}

/* --- Encabezado --- */
.upana-form-wrap h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--upana-primary);
    margin: 0 0 0.5rem 0;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--upana-border);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.upana-form-intro {
    font-size: 0.95rem;
    color: var(--upana-text-light);
    margin: 1rem 0 2rem 0;
    padding: 0.875rem 1.25rem;
    background: #f7f9fc;
    border-left: 4px solid var(--upana-accent);
    border-radius: var(--upana-radius-sm);
    line-height: 1.6;
}

/* --- Grid del formulario --- */
.upana-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
    .upana-grid {
        grid-template-columns: 1fr;
    }
    
    .upana-form-wrap {
        padding: 1.5rem;
    }
}

/* --- Campos del formulario --- */
.upana-field {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.upana-field label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--upana-text);
    letter-spacing: 0.01em;
}

.upana-field label.is-required {
    /* El asterisco se maneja por separado */
}

.upana-required {
    color: var(--upana-error);
    font-weight: 700;
    margin-left: 2px;
}

/* Inputs, selects y textareas */
.upana-field input[type="text"],
.upana-field input[type="email"],
.upana-field input[type="tel"],
.upana-field input[type="date"],
.upana-field select,
.upana-field textarea {
    width: 100%;
    padding: 0.7rem 0.875rem;
    font-size: 0.9375rem;
    font-family: var(--upana-font);
    color: var(--upana-text);
    background: var(--upana-bg);
    border: 1.5px solid var(--upana-border);
    border-radius: var(--upana-radius-sm);
    transition: all var(--upana-transition);
    box-sizing: border-box;
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* Estilo personalizado para select */
.upana-field select {
    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='%235a6c7d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.875rem center;
    background-size: 12px;
    padding-right: 2.5rem;
    cursor: pointer;
}

.upana-field textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.5;
}

/* Placeholder estilizado */
.upana-field input::placeholder,
.upana-field textarea::placeholder {
    color: #a0aec0;
    font-style: italic;
    font-size: 0.875rem;
}

/* Estados hover */
.upana-field input:hover,
.upana-field select:hover,
.upana-field textarea:hover {
    border-color: #cbd5e0;
    background: #fff;
}

/* Estados focus */
.upana-field input:focus,
.upana-field select:focus,
.upana-field textarea:focus {
    border-color: var(--upana-border-focus);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.08);
}

/* Estados disabled */
.upana-field input:disabled,
.upana-field select:disabled {
    background: #edf2f7;
    cursor: not-allowed;
    opacity: 0.7;
    border-style: dashed;
}

/* Estados de validación */
.upana-field input:invalid:not(:placeholder-shown),
.upana-field select:invalid:not(:focus) {
    border-color: #fc8181;
    background: #fff5f5;
}

.upana-field input:valid:not(:placeholder-shown) {
    border-color: #9ae6b4;
    background: #f0fff4;
}

/* --- Select dependiente con indicador de carga --- */
#carrera:disabled,
#campus:disabled,
#jornada:disabled {
    position: relative;
}

/* --- Botón de envío --- */
.upana-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--upana-font);
    color: #fff;
    background: linear-gradient(135deg, var(--upana-primary) 0%, #1f4d7a 100%);
    border: none;
    border-radius: var(--upana-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(26, 58, 92, 0.2);
}

.upana-btn:hover {
    background: linear-gradient(135deg, var(--upana-primary-hover) 0%, #2a5a8a 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 58, 92, 0.3);
}

.upana-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(26, 58, 92, 0.2);
}

.upana-btn:focus-visible {
    outline: 3px solid rgba(26, 58, 92, 0.4);
    outline-offset: 2px;
}

/* Estado de carga del botón */
.upana-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

.upana-btn .btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: upana-spin 0.6s linear infinite;
}

.upana-btn.loading .btn-text {
    opacity: 0;
}

.upana-btn.loading .btn-loader {
    display: block;
    position: absolute;
}

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

/* --- Mensajes de feedback --- */
.upana-message {
    margin-top: 1.25rem;
    padding: 0.875rem 1.25rem;
    border-radius: var(--upana-radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.5;
    display: none;
    animation: upana-fadeIn 0.3s ease;
}

.upana-message.success {
    display: block;
    background: var(--upana-success-bg);
    color: #22543d;
    border: 1px solid #c6f6d5;
    border-left: 4px solid var(--upana-success);
}

.upana-message.error {
    display: block;
    background: var(--upana-error-bg);
    color: #742a2a;
    border: 1px solid #fed7d7;
    border-left: 4px solid var(--upana-error);
}

@keyframes upana-fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Animación de carga para selects dependientes --- */
@keyframes upana-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.upana-field select.loading-options {
    animation: upana-pulse 1.5s ease infinite;
    background-color: #f7fafc;
}

/* --- Responsive adicional --- */
@media (max-width: 480px) {
    .upana-form-wrap {
        padding: 1.25rem;
        border-radius: 12px;
    }
    
    .upana-form-wrap h1 {
        font-size: 1.375rem;
    }
    
    .upana-btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
}

/* --- Soporte para modo oscuro (opcional) --- */
@media (prefers-color-scheme: dark) {
    /* Descomenta si deseas soporte para modo oscuro */
    /*
    :root {
        --upana-bg: #1a202c;
        --upana-card-bg: #2d3748;
        --upana-text: #e2e8f0;
        --upana-text-light: #a0aec0;
        --upana-border: #4a5568;
    }
    */
}

/* --- Mejora de accesibilidad: foco visible --- */
.upana-field input:focus-visible,
.upana-field select:focus-visible,
.upana-field textarea:focus-visible {
    outline: 2px solid var(--upana-primary);
    outline-offset: 1px;
}

/* --- Tooltip para campos obligatorios (opcional) --- */
.upana-field label.is-required::after {
    /* Puedes agregar un tooltip si lo deseas */
}

/* --- Separador visual entre secciones --- */
.upana-field.full-width {
    grid-column: 1 / -1;
}

/* Utilidad para campos que ocupan todo el ancho */
@media (min-width: 641px) {
    .upana-field.span-2 {
        grid-column: span 2;
    }
}
.upana-submit,
button[type="submit"] {
    background: linear-gradient(135deg, #16395f 0%, #285f9d 100%);
    color: #ffffff;
    border: none;
    border-radius: 14px;
    padding: 15px 28px;
    min-width: 180px;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: .3px;
    cursor: pointer;
    transition: all .25s ease;
    box-shadow: 0 10px 24px rgba(22, 57, 95, 0.22);
    position: relative;
    overflow: hidden;
}

.upana-submit:hover,
button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(22, 57, 95, 0.30);
    background: linear-gradient(135deg, #1b4878 0%, #3573bb 100%);
}

.upana-submit:active,
button[type="submit"]:active {
    transform: scale(.98);
}

.upana-submit::before,
button[type="submit"]::before {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,.18);
    transform: skewX(-25deg);
    transition: .6s;
}

.upana-submit:hover::before,
button[type="submit"]:hover::before {
    left: 120%;
}