/* ==========================================
   VARIABLES Y RESET
   ========================================== */
:root {
    --color-primary: #C85A1F;      /* Naranja institucional */
    --color-secondary: #E62B1E;    /* Rojo institucional */
    --color-dark: #2C3E50;
    --color-light: #F8F9FA;
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================
   HEADER INSTITUCIONAL
   ========================================== */
.institutional-header {
    background-color: var(--color-white);
    padding: 15px 0;
    box-shadow: var(--shadow-sm);
}

.logos-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.logos-left {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.logos-left img {
    height: 60px;
    width: auto;
}

.logo-posgrado-center {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 0 0 auto;
}

.logo-posgrado-center img {
    height: 70px;
    width: auto;
    max-width: 250px;
}

.logo-right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex: 1;
}

.logo-right img {
    height: 60px;
    width: auto;
}

.logos-full {
    max-width: 100%;
    height: auto;
}

/* ==========================================
   NAVEGACIÓN PRINCIPAL
   ========================================== */
.main-navigation {
    background: linear-gradient(135deg, var(--color-primary) 0%, #D86825 100%);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-menu {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    color: var(--color-white);
    text-decoration: none;
    padding: 18px 25px;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
    background-color: rgba(0, 0, 0, 0.15);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-toggle .arrow {
    font-size: 10px;
    margin-left: 5px;
    transition: var(--transition);
}

.dropdown:hover .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    min-width: 280px;
    box-shadow: var(--shadow-lg);
    list-style: none;
    padding: 10px 0;
    border-radius: 0 0 8px 8px;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    display: block;
    animation: fadeIn 0.3s ease;
}

.dropdown-menu li {
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background-color: var(--color-light);
    padding-left: 25px;
    color: var(--color-primary);
}

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

/* ==========================================
   MAIN CONTENT
   ========================================== */
.main-content {
    min-height: 60vh;
    padding: 40px 0;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: var(--color-white);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Background Slideshow */
.hero-background-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 2s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 60, 114, 0.4) 0%, rgba(42, 82, 152, 0.4) 100%);
    z-index: 1;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom center no-repeat;
    background-size: cover;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3em;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-section p {
    font-size: 1.3em;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-illustration {
    max-width: 500px;
    margin: 40px auto;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.info-card {
    background: var(--color-white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-top: 4px solid var(--color-primary);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.info-card h3 {
    color: var(--color-primary);
    font-size: 1.5em;
    margin-bottom: 15px;
}

.info-card p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #C52517 100%);
    color: var(--color-white);
    padding: 60px 0;
    text-align: center;
    margin: 60px 0;
}

.cta-section h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-white);
    color: var(--color-secondary);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1em;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Publications Section */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.publication-card {
    background: var(--color-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.publication-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.publication-content {
    padding: 25px;
}

.publication-title {
    font-size: 1.3em;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.publication-date {
    color: var(--color-text-light);
    font-size: 0.9em;
    margin-bottom: 15px;
}

.publication-excerpt {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.btn-read-more {
    display: inline-block;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-read-more:hover {
    color: var(--color-secondary);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #D86825 100%);
    color: var(--color-white);
    padding: 60px 0;
    text-align: center;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 2.5em;
    font-weight: 700;
}

/* Content Section */
.content-section {
    background: var(--color-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.content-section h2 {
    color: var(--color-primary);
    font-size: 2em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--color-primary);
}

.content-section h3 {
    color: var(--color-dark);
    font-size: 1.5em;
    margin-top: 30px;
    margin-bottom: 15px;
}

.content-section p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--color-text);
}

.content-section ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.content-section li {
    margin-bottom: 10px;
    line-height: 1.8;
}

/* Editorial Committee */
.committee-section {
    margin-bottom: 40px;
}

.committee-member {
    background: var(--color-light);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.member-name {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.2em;
}

.member-role {
    color: var(--color-text-light);
    font-style: italic;
}

/* ==========================================
   FOOTER INSTITUCIONAL
   ========================================== */
.institutional-footer {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #C52517 100%);
    color: var(--color-white);
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-image {
    width: 100%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.contact-info h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
}

.contact-info p {
    margin-bottom: 8px;
    line-height: 1.6;
}

.contact-info a {
    color: var(--color-white);
    text-decoration: underline;
}

.footer-map iframe {
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .logos-banner {
        flex-direction: column;
        gap: 15px;
    }

    .logos-left,
    .logo-posgrado-center,
    .logo-right {
        justify-content: center;
        width: 100%;
    }

    .logos-left img,
    .logo-posgrado-center img,
    .logo-right img {
        height: 50px;
    }

    .nav-menu {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-menu > li {
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .dropdown-menu {
        position: static;
        display: none;
        box-shadow: none;
        border-radius: 0;
    }

    .dropdown.active .dropdown-menu {
        display: block;
    }

    .hero-section h1 {
        font-size: 2em;
    }

    .hero-section p {
        font-size: 1.1em;
    }

    .info-cards {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .publications-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 1.8em;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center {
    text-align: center;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}

.mt-40 {
    margin-top: 40px;
}