/* Base variables institucionales */
:root {
    --color-guinda: #6A1B31; /* Color institucional TecNM / Gobierno */
    --color-dorado: #BC955C;
    --color-blanco: #FFFFFF;
    --color-gris-claro: #F4F4F6;
    --color-gris-oscuro: #333333;
    --color-azul-tecnm: #1B396A; /* Azul original logo TecNM */
    
    --font-main: 'Montserrat', sans-serif;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-gris-claro);
    color: var(--color-gris-oscuro);
    line-height: 1.6;
    overflow-x: hidden;
}
iframe {
    max-width: 100%;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    color: var(--color-azul-tecnm);
    margin-bottom: 2rem;
    font-weight: 700;
}

/* Header Fijo */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    padding: 10px 0;
   transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}
    
    .header-banner {
        width: 100%;
        max-width: 100%; /* El truco principal: obliga a la imagen a respetar los bordes */
        height: auto;
        object-fit: contain;
        display: block; /* Previene anomalías de cálculo de tamaño en flexbox */
        margin: 0 auto; /* Mantiene la imagen perfectamente centrada */
    }

/* Hero Section */
.hero {
    position: relative;
    padding-top: 100px; /* offset for header */
    background: linear-gradient(135deg, rgba(240, 241, 243, 0.85) 0%, rgba(255, 255, 255, 0.85) 100%), url('invitacion/fondo_header.JPG') center/cover no-repeat;
    color: var(--color-gris-oscuro);
    text-align: center;
    font-size: 2cqmax;
    padding-bottom: 70px;
}

.hero-content {
    padding: 40px 20px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-azul-tecnm);
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.video-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border-radius: 12px;
    overflow: hidden;
    z-index: 2;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Separador institucional */
.divider {
    height: 10px;
    background: linear-gradient(90deg, var(--color-guinda) 0%, var(--color-dorado) 50%, var(--color-azul-tecnm) 100%);
}

/* Cuenta Regresiva */
.countdown-section {
    padding: 80px 0;
    background-color: var(--color-blanco);
}

.countdown-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.time-box {
    background: var(--color-blanco);
    border: 2px solid var(--color-dorado);
    border-radius: 15px;
    padding: 20px;
    min-width: 120px;
    text-align: center;
    box-shadow: 0 8px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.time-box:hover {
    transform: translateY(-5px);
}

.time-box span {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-azul-tecnm);
    line-height: 1;
}

.time-box p {
    margin-top: 10px;
    font-weight: 600;
    color: var(--color-guinda);
    text-transform: uppercase;
    font-size: 0.9rem;
}

.hidden { display: none; }

/* Info Section (Fecha/Hora) */
.info-section {
    padding: 60px 0;
}

.info-cards {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    background: var(--color-blanco);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    flex: 1;
    min-width: 280px;
    max-width: 400px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.card .icon {
    font-size: 3rem;
    color: var(--color-dorado);
    margin-bottom: 20px;
}

.card h3 {
    color: var(--color-azul-tecnm);
    margin-bottom: 10px;
    font-size: 1.5rem;
}

/* Programa Timeline */
.program-section {
    padding: 80px 0;
    background-color: var(--color-blanco);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--color-dorado);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--color-guinda);
    border: 4px solid var(--color-dorado);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-time {
    font-weight: 700;
    color: var(--color-guinda);
    margin-bottom: 5px;
}

.timeline-content {
    padding: 20px;
    background-color: var(--color-gris-claro);
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.timeline-content h4 {
    color: var(--color-azul-tecnm);
    margin-bottom: 10px;
}

.btn-link {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 15px;
    background-color: transparent;
    color: var(--color-azul-tecnm);
    border: 2px solid var(--color-azul-tecnm);
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-link:hover {
    background-color: var(--color-azul-tecnm);
    color: var(--color-blanco);
}

/* Presidium */
.presidium-section {
    padding: 80px 0;
    background-color: var(--color-gris-claro);
}

.presidium-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.presidium-card {
    background: var(--color-blanco);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    position: relative;
    border-top: 4px solid var(--color-dorado);
}

.presidium-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.presidium-card.host {
    border-top-color: var(--color-guinda);
    grid-column: 1 / -1;
    max-width: 500px;
    margin: 0 auto;
}

.presidium-name {
    color: var(--color-azul-tecnm);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.presidium-role {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 15px;
}

.presidium-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    background-color: var(--color-guinda);
    color: var(--color-blanco);
}

.presidium-badge.guest {
    background-color: var(--color-dorado);
    color: var(--color-blanco);
}
/* =========================================
   SECCIÓN DE PROGRAMAS EDUCATIVOS
   ========================================= */

.programs-section {
    padding: 60px 0;
    background-color: var(--color-gris-claro); /* Usa la variable de tu fondo */
}

.programs-grid {
    display: grid;
    /* Esto hace que se adapte automático a celulares o PC */
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.program-card {
    background-color: var(--color-blanco);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.program-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.program-icon {
    font-size: 3.5rem;
    color: var(--color-dorado); /* El color dorado de tu paleta */
    margin-bottom: 20px;
}

.program-name {
    font-size: 1.1rem;
    color: var(--color-azul-tecnm); /* El azul institucional */
    margin-bottom: 20px;
    font-weight: 600;
    min-height: 50px; /* Para mantener la altura uniforme */
}

.program-card .btn-link {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--color-guinda);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.program-card .btn-link:hover {
    background-color: #4a1322; /* Un guinda un poco más oscuro al pasar el ratón */
    color: #fff;
}
/* Ubicación */
.location-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(27, 57, 106, 0.85) 0%, rgba(106, 27, 49, 0.85) 100%), url('invitacion/fondo_header.JPG') center/cover no-repeat fixed;
    color: var(--color-blanco);
    position: relative;
}

.location-section .section-title {
    color: var(--color-dorado);
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.location-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    color: var(--color-gris-oscuro);
}



.map-container {
    margin: 30px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.btn-primary {
    display: inline-block;
    padding: 15px 30px;
    background-color: var(--color-guinda);
    color: var(--color-blanco);
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #8c2340;
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(106, 27, 49, 0.3);
}

/* Vestimenta y Calendario */
.extra-info-section {
    padding: 60px 0 80px;
    background-color: var(--color-blanco);
}

.extra-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.dress-icons {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 20px;
}

.dress-icon {
    text-align: center;
}

.dress-icon i {
    font-size: 4rem;
    color: var(--color-azul-tecnm);
    margin-bottom: 10px;
}

.dress-note {
    margin-top: 20px;
    font-style: italic;
    color: #666;
}

.btn-calendar {
    margin-top: 25px;
    background-color: var(--color-azul-tecnm);
}

.btn-calendar:hover {
    background-color: #2a5298;
    box-shadow: 0 8px 15px rgba(27, 57, 106, 0.3);
}

/* Footer */
.footer {
    background-color: var(--color-azul-tecnm);
    color: var(--color-blanco);
    text-align: center;
    padding: 40px 0;
}

.footer p {
    font-size: 1.2rem;
    font-weight: 600;
}

.footer .footer-small {
    font-size: 0.9rem;
    font-weight: 300;
    margin-top: 10px;
    opacity: 0.8;
}

/* Modal/Lightbox */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    animation: zoomIn 0.3s;
}

@keyframes zoomIn {
    from {transform: scale(0.8); opacity: 0;}
    to {transform: scale(1); opacity: 1;}
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.close-modal:hover,
.close-modal:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* Responsive */
@media screen and (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 10px;
    }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.2rem; }
    
    .timeline::after {
        left: 31px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .timeline-item:nth-child(even) {
        left: 0%;
    }
    
    .timeline-item::after {
        left: 21px;
    }
    
    .timeline-item:nth-child(even)::after {
        left: 21px;
    }
    
    .extra-info-grid {
        grid-template-columns: 1fr;
    }

}