:root {
    --unam-blue:        #0a4080;
    --unam-blue-dark:   #052d61;
    --unam-blue-light:  #1565c0;
    --unam-blue-subtle: #e8f0fc;
    --unam-gold:        #e8c12a;
    --unam-gold-dark:   #c9a620;
    --unam-gold-light:  #fef9e7;
    --text-main:        #1a2332;
    --text-muted:       #5a6a7e;
    --bg-body:          #f0f4f9;
    --shadow-blue:      rgba(10, 64, 128, 0.12);
    --shadow-blue-lg:   rgba(10, 64, 128, 0.22);
    --radius-md:        0.75rem;
    --radius-lg:        1rem;
}

body {
    background-color: var(--bg-body);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--text-main);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
}

/* =========================================
   HEADER INSTITUCIONAL
   ========================================= */

/* Franja dorada superior */
.main-header::before {
    content: '';
    display: block;
    height: 4px;
    background: linear-gradient(90deg, var(--unam-gold-dark), var(--unam-gold), var(--unam-gold-dark));
}

.main-header {
    background: linear-gradient(160deg, var(--unam-blue-dark) 0%, var(--unam-blue) 55%, var(--unam-blue-light) 100%);
    border-bottom: 4px solid var(--unam-gold);
    box-shadow: 0 4px 24px var(--shadow-blue-lg);
}

/* Separadores verticales entre logos y texto */
.header-logo-col {
    position: relative;
}

.header-logo-col::after {
    content: '';
    position: absolute;
    top: 10%;
    bottom: 10%;
    right: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.2);
}

.header-logo-col--right::after {
    left: 0;
    right: auto;
}

/* Logos */
.header-logo {
    max-height: 90px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease, filter 0.3s ease;
}

.header-logo:hover {
    transform: scale(1.04);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.4));
}

/* Jerarquía Institucional */
.header-text-block {
    padding: 0 1rem;
}

.h-level-1 {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    color: #ffffff;
    letter-spacing: 1.2px;
}

.h-level-divider {
    display: block;
    width: 40px;
    height: 1px;
    background: rgba(255, 255, 255, 0.3);
    margin: 0.35rem auto;
}

.h-level-2 {
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.2px;
}

.h-level-3 {
    font-size: 0.84rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.78);
}

.h-level-4 {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--unam-gold);
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-block;
    padding: 0.15rem 0.7rem;
    border: 1px solid rgba(232, 193, 42, 0.45);
    border-radius: 20px;
    margin-top: 0.1rem;
}

.main-title {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--unam-blue);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-bottom: 3px solid var(--unam-gold);
    padding-bottom: 0.5rem;
}

/* =========================================
   COMPONENTES BOOTSTRAP OVERRIDES
   ========================================= */

/* Tarjetas (Cards) */
.card {
    border: none !important;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-blue);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    background-color: #ffffff;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--shadow-blue-lg);
}

/* Cabeceras de Tarjetas */
.card-header.bg-secondary {
    background: linear-gradient(100deg, var(--unam-blue) 0%, var(--unam-blue-light) 100%) !important;
    border-bottom: 3px solid var(--unam-gold) !important;
    color: #ffffff !important;
    padding: 1.1rem 1.5rem;
    border-top-left-radius: var(--radius-lg) !important;
    border-top-right-radius: var(--radius-lg) !important;
}

.card-header.bg-secondary h5 {
    font-weight: 700;
    letter-spacing: 0.4px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

/* Botones */
.btn-primary {
    background-color: var(--unam-blue);
    border-color: var(--unam-blue);
    font-weight: 600;
    padding: 0.6rem 2.5rem;
    border-radius: var(--radius-md);
    letter-spacing: 0.3px;
    box-shadow: 0 4px 10px var(--shadow-blue);
    transition: all 0.25s ease;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--unam-blue-dark) !important;
    border-color: var(--unam-blue-dark) !important;
    box-shadow: 0 6px 18px var(--shadow-blue-lg) !important;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--unam-gold);
    border-color: var(--unam-gold);
    color: #1a1a1a;
    font-weight: 700;
    letter-spacing: 0.3px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 10px rgba(232, 193, 42, 0.25);
    transition: all 0.25s ease;
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--unam-gold-dark) !important;
    border-color: var(--unam-gold-dark) !important;
    color: #fff !important;
    box-shadow: 0 6px 16px rgba(232, 193, 42, 0.35) !important;
    transform: translateY(-1px);
}

/* Form inputs */
.form-check-input:checked {
    background-color: var(--unam-blue);
    border-color: var(--unam-blue);
}

/* Validación de botones de selección (btn-check) */
.was-validated .btn-check:invalid + .btn {
    border-color: #dc3545 !important;
    color: #dc3545 !important;
    background-color: #fff5f5 !important;
}

.was-validated .btn-check:valid:checked + .btn {
    background-color: var(--unam-blue) !important;
    border-color: var(--unam-blue) !important;
    color: #ffffff !important;
}

.form-control:focus, .form-select:focus {
    border-color: var(--unam-blue-light);
    box-shadow: 0 0 0 0.2rem rgba(10, 64, 128, 0.18);
}

.form-control, .form-select {
    border-radius: var(--radius-md);
    border: 1px solid #c8d4e3;
    padding: 0.6rem 1rem;
    color: var(--text-main);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Alertas y Vistas de Confirmación */
.alert {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: 0 3px 12px var(--shadow-blue);
    border-left: 5px solid transparent;
}

.alert-danger {
    border-left-color: #dc3545;
    background-color: #fff5f5;
    color: #9b2c2c;
}

.alert-warning {
    border-left-color: var(--unam-gold);
    background-color: var(--unam-gold-light);
    color: #7a5c00;
}

.alert-secondary {
    border-left-color: var(--unam-blue);
    background-color: var(--unam-blue-subtle);
    color: var(--unam-blue-dark);
}

/* Modales */
.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: 0 16px 48px var(--shadow-blue-lg);
}

.modal-header.bg-warning {
    background-color: var(--unam-gold) !important;
    color: #1a1a1a !important;
    border-bottom: none;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* Utilidades adicionales */
.bg-light {
    background-color: var(--unam-blue-subtle) !important;
    border-radius: var(--radius-md);
}

.border-bottom {
    border-bottom: 1px solid #dce6f0 !important;
}

.text-primary {
    color: var(--unam-blue) !important;
}

.border-primary {
    border-color: var(--unam-blue) !important;
}

/* =========================================
   ESTILOS LEGACY (actualizados a rem)
   ========================================= */

.texto, .texto2 {
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: normal;
    color: var(--text-main);
    text-decoration: none;
}
.titulo {
    font-family: inherit;
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--unam-blue);
    text-decoration: none;
}
.pregunta, .pregunta2 {
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: bold;
    color: var(--text-main);
    text-decoration: none;
}
.pregunta3 {
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--text-main);
    text-decoration: none;
}
.pequeña, .notas {
    font-family: inherit;
    font-size: 0.72rem;
    font-weight: normal;
    color: var(--text-muted);
    text-decoration: none;
}
.link {
    font-family: inherit;
    font-size: 1.25rem;
    font-weight: normal;
    color: var(--unam-gold-dark);
    text-decoration: none;
}

/* =========================================
   AVISO DE PRIVACIDAD
   ========================================= */
.privacidad-notice {
    background-color: var(--unam-blue-subtle);
    border: 1px solid rgba(10, 64, 128, 0.15);
    border-left: 4px solid var(--unam-blue);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.1rem;
}

.privacidad-notice .form-check-input {
    width: 1.15em;
    height: 1.15em;
    cursor: pointer;
}

.privacidad-link {
    color: var(--unam-blue);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

.privacidad-link:hover {
    color: var(--unam-blue-light);
}

/* =========================================
   FOOTER INSTITUCIONAL
   ========================================= */
.main-footer {
    border-top: 4px solid var(--unam-gold);
}

.footer-browsers {
    background-color: var(--unam-blue-subtle);
    color: var(--text-muted);
    font-size: 0.8rem;
    border-bottom: 1px solid rgba(10, 64, 128, 0.1);
}

.footer-browsers strong {
    color: var(--unam-blue);
}

.footer-body {
    background: linear-gradient(160deg, var(--unam-blue-dark) 0%, var(--unam-blue) 100%);
}

.footer-legal {
    font-size: 0.76rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    max-width: 900px;
    margin: 0 auto;
}

.footer-credits {
    font-size: 0.78rem;
    font-style: italic;
}

.footer-credits-link {
    color: rgba(255, 255, 255, 0.42);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-credits-link:hover {
    color: var(--unam-gold);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-credits-link strong {
    font-style: normal;
    font-weight: 600;
}

/* Modal de créditos */
.creditos-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    margin-bottom: 0.1rem;
}

.creditos-value {
    font-size: 0.9rem;
    color: var(--text-main);
    margin-bottom: 0.9rem;
}

.creditos-divider {
    border-color: rgba(10, 64, 128, 0.12);
    margin: 1rem 0;
}

.creditos-año {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}