/* ==========================================================================
   DESIGN SYSTEM & CSS VARIABLES
   ========================================================================== */
:root {
    /* Institutional & Brand Colors */
    --ieee-blue: #00629B;
    --pes-green: #78BE20;
    --navy-dark: #002855;
    
    /* Global Variables - Theme-dependent (Defaults: Light Theme) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-inverse: #ffffff;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 98, 155, 0.06);
    --card-bg: #ffffff;
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.5);
    
    /* Interactive States & Accents */
    --accent-color: var(--pes-green);
    --accent-gradient: linear-gradient(135deg, var(--ieee-blue) 0%, var(--pes-green) 100%);
    --accent-gradient-hover: linear-gradient(135deg, #005282 0%, #62af1b 100%);
    
    /* Fonts */
    --font-headers: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Layout Variables */
    --header-height: 80px;
    --max-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables Override */
body.dark-theme {
    --bg-primary: #0b132b;
    --bg-secondary: #111a35;
    --bg-tertiary: #070c1b;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-inverse: #0b132b;
    --border-color: #1e293b;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --card-bg: #16223f;
    --card-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(11, 19, 43, 0.8);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    --accent-color: #8ce62c; /* Tono verde ligeramente mas brillante para contraste */
}

/* ==========================================================================
   CSS RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}

/* Transición suave y global para cambio de tema */
body, 
.main-header, 
.nav-item, 
.about-card, 
.about-pifi-banner, 
.event-card, 
.team-card, 
.contact-info-panel, 
.contact-form-wrapper, 
.form-input, 
.form-textarea, 
.main-footer, 
.theme-toggle-btn, 
.modal-container, 
.modal-technical-specs {
    transition: background-color var(--transition-medium), 
                border-color var(--transition-medium), 
                color var(--transition-medium), 
                box-shadow var(--transition-medium);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

ul, ol {
    list-style: none;
}

/* ==========================================================================
   REUSABLE UTILITIES & COMPONENTS
   ========================================================================== */
.section-container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.section-tag {
    font-family: var(--font-mono);
    color: var(--ieee-blue);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.875rem;
    display: inline-block;
    margin-bottom: 12px;
    padding: 4px 12px;
    background-color: rgba(0, 98, 155, 0.08);
    border-radius: 20px;
    transition: background-color var(--transition-medium);
}

body.dark-theme .section-tag {
    color: #4ade80;
    background-color: rgba(74, 222, 128, 0.1);
}

.section-title {
    font-family: var(--font-headers);
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.section-description {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-headers);
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-medium);
    gap: 8px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 14px 0 rgba(120, 190, 32, 0.3);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(120, 190, 32, 0.4);
}

.btn-secondary {
    border: 2px solid var(--border-color);
    color: var(--text-main);
    background-color: transparent;
}

.btn-secondary:hover {
    border-color: var(--ieee-blue);
    background-color: rgba(0, 98, 155, 0.04);
}

body.dark-theme .btn-secondary:hover {
    border-color: var(--accent-color);
    background-color: rgba(120, 190, 32, 0.05);
}

.btn-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

.btn-text {
    display: inline-flex;
    align-items: center;
    color: var(--ieee-blue);
    font-weight: 600;
    font-size: 0.95rem;
    gap: 6px;
    transition: color var(--transition-fast);
}

body.dark-theme .btn-text {
    color: var(--accent-color);
}

.btn-text:hover {
    color: var(--pes-green);
}

.btn-text:hover .arrow-icon {
    transform: translateX(4px);
}

.arrow-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

/* Background Overlay Pattern */
.grid-background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        radial-gradient(var(--border-color) 1px, transparent 1px),
        radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
    opacity: 0.15;
    z-index: -2;
    pointer-events: none;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    transition: background-color var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
}

.main-header.scrolled {
    box-shadow: 0 10px 30px -10px var(--shadow-color);
}

.header-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.logo-img:hover {
    transform: scale(1.02);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-item {
    font-family: var(--font-headers);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
    position: relative;
    color: var(--text-muted);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-medium);
}

.nav-item:hover {
    color: var(--text-main);
}

.nav-item:hover::after,
.nav-item.active::after {
    width: 100%;
}

.nav-item.active {
    color: var(--ieee-blue);
    font-weight: 600;
}

body.dark-theme .nav-item.active {
    color: var(--accent-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
    transform: scale(1.05);
}

.sun-icon {
    display: none; /* Ocultar en modo claro */
    width: 20px;
    height: 20px;
}

.moon-icon {
    display: block; /* Mostrar en modo claro */
    width: 20px;
    height: 20px;
}

body.dark-theme .sun-icon {
    display: block; /* Mostrar en modo oscuro */
}

body.dark-theme .moon-icon {
    display: none; /* Ocultar en modo oscuro */
}

/* Hamburger Menu Mobile */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 110;
}

.hamburger-bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-main);
    border-radius: 4px;
    transition: all var(--transition-medium);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    position: relative;
    padding-top: calc(var(--header-height) + 40px);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 40px 24px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 650px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 30px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    color: var(--text-muted);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--pes-green);
    box-shadow: 0 0 8px var(--pes-green);
    animation: pulse 1.5s infinite;
}

.hero-title {
    font-family: var(--font-headers);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.highlight-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-media {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-hero-container {
    width: 100%;
    max-width: 320px;
    background: radial-gradient(circle, var(--shadow-color) 0%, transparent 70%);
    padding: 40px;
    animation: float 6s ease-in-out infinite;
}

.hero-logo-img {
    width: 100%;
    height: auto;
}

/* Floating Energy Particles */
.floating-particle {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    filter: blur(4px);
    opacity: 0.6;
}

.p1 {
    background-color: var(--pes-green);
    top: 20%;
    left: 10%;
    animation: floatParticle 8s ease-in-out infinite;
}

.p2 {
    background-color: var(--ieee-blue);
    bottom: 25%;
    right: 15%;
    animation: floatParticle 10s ease-in-out infinite 1s;
}

.p3 {
    background-color: var(--navy-dark);
    top: 60%;
    left: 80%;
    animation: floatParticle 12s ease-in-out infinite 2s;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
    z-index: 10;
}

.scroll-mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background-color: var(--text-muted);
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

/* ==========================================================================
   ACERCA DE NOSOTROS
   ========================================================================== */
.about-section {
    background-color: var(--bg-secondary);
    transition: background-color var(--transition-medium);
}

.about-intro-text {
    max-width: 850px;
    margin: -30px auto 60px auto;
    text-align: center;
}

.about-intro-text p {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.75;
    margin-bottom: 20px;
}

.about-intro-text p:last-child {
    margin-bottom: 0;
}

.about-card-text + .about-card-text {
    margin-top: 16px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.about-card {
    background-color: var(--card-bg);
    padding: 48px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px -10px var(--shadow-color);
    border-color: rgba(120, 190, 32, 0.4);
}

.about-card-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-sm);
    background: linear-gradient(135deg, rgba(0, 98, 155, 0.1) 0%, rgba(120, 190, 32, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    color: var(--ieee-blue);
}

body.dark-theme .about-card-icon-wrapper {
    color: var(--accent-color);
}

.about-card-icon {
    width: 30px;
    height: 30px;
}

.about-card-title {
    font-family: var(--font-headers);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-card-text {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

.about-card-text strong {
    color: var(--text-main);
    font-weight: 600;
}

/* PIFI Banner */
.about-pifi-banner {
    display: flex;
    background: linear-gradient(135deg, var(--navy-dark) 0%, #004e7c 100%);
    color: #ffffff;
    border-radius: var(--border-radius-md);
    padding: 48px;
    gap: 48px;
    align-items: center;
    box-shadow: var(--card-shadow);
}

.pifi-banner-content {
    flex: 1.2;
}

.pifi-banner-title {
    font-family: var(--font-headers);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.pifi-banner-text {
    font-size: 1.05rem;
    opacity: 0.9;
    line-height: 1.6;
}

.pifi-banner-text strong {
    font-weight: 600;
    color: var(--pes-green);
}

.pifi-banner-stats {
    flex: 0.8;
    display: flex;
    gap: 32px;
    justify-content: space-around;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-family: var(--font-headers);
    font-size: 3rem;
    font-weight: 800;
    color: var(--pes-green);
    display: block;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================================================
   NUESTROS EVENTOS
   ========================================================================== */
.events-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-headers);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 24px;
    border-radius: 30px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    transition: all var(--transition-medium);
}

.filter-btn:hover {
    background-color: var(--border-color);
    color: var(--text-main);
}

.filter-btn.active {
    background-color: var(--ieee-blue);
    border-color: var(--ieee-blue);
    color: #ffffff;
}

body.dark-theme .filter-btn.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--text-inverse);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
}

.event-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.event-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -10px var(--shadow-color);
    border-color: rgba(0, 98, 155, 0.3);
}

body.dark-theme .event-card:hover {
    border-color: rgba(120, 190, 32, 0.3);
}

.event-image-container {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.event-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.event-card:hover .event-img {
    transform: scale(1.05);
}

.event-status-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    font-family: var(--font-headers);
    font-weight: 700;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 5px 12px;
    border-radius: 20px;
    color: #ffffff;
    z-index: 10;
}

.event-status-badge.realizado {
    background-color: #059669;
}

.event-status-badge.por-realizar {
    background-color: #d97706;
}

.event-type-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    font-family: var(--font-headers);
    font-weight: 700;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 5px 12px;
    border-radius: 20px;
    color: #ffffff;
    z-index: 10;
}

.event-type-badge.visita {
    background-color: var(--pes-green);
}

.event-type-badge.panel {
    background-color: var(--ieee-blue);
}

.event-type-badge.taller {
    background-color: var(--navy-dark);
}

.event-type-badge.congreso {
    background-color: #6366f1; /* Indigo */
}

.event-info {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.event-meta {
    margin-bottom: 12px;
}

.event-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.meta-icon {
    width: 14px;
    height: 14px;
}

.event-card-title {
    font-family: var(--font-headers);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 12px;
    color: var(--text-main);
}

.event-card-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
}

/* ==========================================================================
   EQUIPO DE TRABAJO (MESA DIRECTIVA)
   ========================================================================== */
.team-section {
    background-color: var(--bg-secondary);
}

.team-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
}

/* Team Group Showcase Banner */
.team-group-showcase {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    align-items: center;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.team-group-showcase:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px -10px var(--shadow-color);
    border-color: rgba(0, 98, 155, 0.3);
}

.team-group-photo-container {
    width: 100%;
    height: 100%;
    min-height: 300px;
    overflow: hidden;
}

.team-group-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}

.team-group-showcase:hover .team-group-img {
    transform: scale(1.03);
}

.team-group-content {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.group-badge {
    font-family: var(--font-mono);
    color: var(--pes-green);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
    display: inline-block;
}

body.dark-theme .group-badge {
    color: var(--accent-color);
}

.group-title {
    font-family: var(--font-headers);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.group-description {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .team-group-showcase {
        grid-template-columns: 1fr;
    }
    .team-group-photo-container {
        min-height: 220px;
    }
    .team-group-content {
        padding: 30px;
    }
}

/* For Uriel (President) we can make his card slightly wider or highlight it in grid if desired,
   but maintaining consistent alignment is cleaner. Let's make the President start first. */

.team-card {
    flex: 1 1 240px;
    max-width: 280px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    text-align: center;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px -10px var(--shadow-color);
    border-color: rgba(120, 190, 32, 0.4);
}

.member-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 100%; /* Relación de aspecto 1:1 */
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.member-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.team-card:hover .member-img {
    transform: scale(1.05);
}

/* Gradient Avatars for when images are empty */
.member-avatar-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-headers);
    font-size: 3rem;
    font-weight: 800;
    color: #ffffff;
    user-select: none;
}

.avatar-uriel {
    background: linear-gradient(135deg, #00629b 0%, #002855 100%);
}

.avatar-vice {
    background: linear-gradient(135deg, #78be20 0%, #00843d 100%);
}

.avatar-secretary {
    background: linear-gradient(135deg, #00629b 0%, #78be20 100%);
}

.avatar-treasurer {
    background: linear-gradient(135deg, #002855 0%, #78be20 100%);
}

.avatar-marketing {
    background: linear-gradient(135deg, #475569 0%, #0f172a 100%);
}

.member-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 40, 85, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transform: translateY(100%);
    transition: opacity var(--transition-medium), transform var(--transition-medium);
}

.team-card:hover .member-overlay {
    opacity: 1;
    transform: translateY(0);
}

.member-bio {
    color: #ffffff;
    font-size: 0.9rem;
    line-height: 1.5;
}

.member-info {
    padding: 24px;
}

.member-name {
    font-family: var(--font-headers);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.3;
    color: var(--text-main);
}

.member-role {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--ieee-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

body.dark-theme .member-role {
    color: var(--accent-color);
}

.member-links {
    display: flex;
    justify-content: center;
}

.social-member-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.8rem;
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 20px;
}

.social-member-link.linkedin {
    background-color: #0077b5;
}

.social-member-link.linkedin:hover {
    background-color: #005a8a;
}

.social-member-link.instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.social-member-link.instagram:hover {
    filter: brightness(0.9);
}

.social-icon-svg {
    width: 14px;
    height: 14px;
}

/* ==========================================================================
   CONTACTANOS SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 48px;
    align-items: stretch;
}

.contact-info-panel {
    background: linear-gradient(135deg, var(--navy-dark) 0%, #004772 100%);
    color: #ffffff;
    border-radius: var(--border-radius-md);
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--card-shadow);
}

.contact-panel-title {
    font-family: var(--font-headers);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-panel-text {
    opacity: 0.85;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 40px;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-bottom: 40px;
}

.contact-detail-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.detail-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pes-green);
    flex-shrink: 0;
}

.detail-icon-wrapper svg {
    width: 20px;
    height: 20px;
}

.detail-text-wrapper {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.8rem;
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.detail-value {
    font-size: 1rem;
    font-weight: 500;
}

.text-link:hover {
    color: var(--pes-green);
    text-decoration: underline;
}

/* Social Networks Row */
.social-networks-container {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 28px;
}

.social-title-small {
    font-family: var(--font-headers);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.social-icons-row {
    display: flex;
    gap: 12px;
}

.social-circle-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    transition: all var(--transition-fast);
}

.social-circle-link svg {
    width: 18px;
    height: 18px;
}

.social-circle-link:hover {
    transform: translateY(-3px);
}

.social-circle-link.linkedin:hover {
    background-color: #0077b5;
}

.social-circle-link.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.social-circle-link.facebook:hover {
    background-color: #1877f2;
}

.social-circle-link.youtube:hover {
    background-color: #ff0000;
}

/* Form Styles */
.contact-form-wrapper {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    padding: 48px;
    box-shadow: var(--card-shadow);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.form-label {
    font-family: var(--font-headers);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-main);
}

.input-wrapper {
    position: relative;
    width: 100%;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-main);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.form-textarea {
    resize: vertical;
}

.form-input:focus, .form-textarea:focus {
    border-color: var(--ieee-blue);
    background-color: var(--bg-primary);
}

body.dark-theme .form-input:focus,
body.dark-theme .form-textarea:focus {
    border-color: var(--accent-color);
}

.focus-border {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--ieee-blue);
    transition: all var(--transition-medium);
}

body.dark-theme .focus-border {
    background-color: var(--accent-color);
}

.form-input:focus ~ .focus-border,
.form-textarea:focus ~ .focus-border {
    width: 100%;
    left: 0;
}

.textarea-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.char-counter {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.error-msg {
    color: #ef4444;
    font-size: 0.8rem;
    font-weight: 500;
    display: none;
}

.btn-submit {
    align-self: flex-start;
    padding: 14px 32px;
    border-radius: var(--border-radius-sm);
}

.form-feedback {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-feedback.success {
    display: flex;
    background-color: rgba(34, 197, 94, 0.1);
    color: #166534;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

body.dark-theme .form-feedback.success {
    background-color: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

.form-feedback.error {
    display: flex;
    background-color: rgba(239, 68, 68, 0.1);
    color: #991b1b;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

body.dark-theme .form-feedback.error {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.feedback-icon {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.main-footer {
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
}

.footer-top {
    border-bottom: 1px solid var(--border-color);
}

.footer-top .footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 60px;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo-img {
    height: 52px;
    width: auto;
    margin-bottom: 24px;
}

.footer-brand-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links-group {
    display: flex;
    flex-direction: column;
}

.footer-links-title {
    font-family: var(--font-headers);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-main);
}

.footer-links-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links-list a {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-links-list a:hover {
    color: var(--ieee-blue);
    transform: translateX(4px);
    display: inline-block;
}

body.dark-theme .footer-links-list a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    padding: 30px 24px;
}

.footer-bottom .footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.copyright-text, .author-credits {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   MODAL DIALOG
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(11, 19, 43, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
    padding: 24px;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform var(--transition-medium);
}

.modal-overlay.open .modal-container {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.5);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    z-index: 10;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.modal-close-btn:hover {
    background-color: rgba(0, 0, 0, 0.8);
    transform: scale(1.05);
}

.modal-header-image {
    position: relative;
    width: 100%;
    height: 300px;
    background-color: var(--bg-tertiary);
}

.modal-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-badge {
    position: absolute;
    bottom: 20px;
    left: 24px;
    font-family: var(--font-headers);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 16px;
    border-radius: 20px;
    color: #ffffff;
    background-color: var(--ieee-blue);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.modal-body-content {
    padding: 36px;
}

.modal-date-label {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 8px;
}

.modal-title {
    font-family: var(--font-headers);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 24px;
}

.modal-text-content {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.modal-text-content p {
    margin-bottom: 16px;
}

.modal-technical-specs {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 24px;
    margin-bottom: 32px;
    border: 1px solid var(--border-color);
}

.specs-title {
    font-family: var(--font-headers);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.specs-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.spec-item {
    display: flex;
    font-size: 0.95rem;
}

.spec-key {
    font-weight: 600;
    width: 140px;
    flex-shrink: 0;
    color: var(--text-main);
}

.spec-val {
    color: var(--text-muted);
}

.modal-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
}

/* ==========================================================================
   ANIMATIONS & KEYFRAMES
   ========================================================================== */
@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(120, 190, 32, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(120, 190, 32, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(120, 190, 32, 0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes floatParticle {
    0% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(10px, -20px);
    }
    100% {
        transform: translate(0, 0);
    }
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.3;
        transform: translateY(6px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Animations classes */
.animate-up.js-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-up.js-reveal.appear {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-pifi-banner {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }
    
    .pifi-banner-stats {
        width: 100%;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    /* Header & Mobile Navigation */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        justify-content: flex-start;
        padding: 40px 24px;
        transition: left var(--transition-medium);
        z-index: 99;
    }
    
    .nav-menu.open {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 32px;
        width: 100%;
    }
    
    .nav-item {
        font-size: 1.2rem;
        display: block;
        text-align: center;
        width: 100%;
    }
    
    .hamburger-menu {
        display: flex;
    }
    
    /* Animation of Mobile Hamburger */
    .hamburger-menu.open .hamburger-bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    
    .hamburger-menu.open .hamburger-bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger-menu.open .hamburger-bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
    
    /* Hero layout */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .logo-hero-container {
        max-width: 240px;
    }
    
    /* Section containers */
    .section-container {
        padding: 70px 20px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-top .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom .footer-container {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .modal-header-image {
        height: 200px;
    }
    
    .modal-body-content {
        padding: 24px;
    }
    
    .modal-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .about-card {
        padding: 24px;
    }
    
    .about-pifi-banner {
        padding: 24px;
    }
    
    .contact-info-panel, .contact-form-wrapper {
        padding: 24px;
    }
}

/* ==========================================================================
   NUEVAS SECCIONES: BANNER SEPARADOR Y ÉXITO DE ANTERIORES GESTIONES
   ========================================================================== */
.banner-separator-section {
    background-color: #000000; /* Fondo negro para fusionarse con el fondo de la imagen */
    padding: 40px 24px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.banner-separator-container {
    width: 100%;
    max-width: var(--max-width);
    display: flex;
    justify-content: center;
}

.separator-banner-img {
    max-width: 900px;
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 12px rgba(120, 190, 32, 0.2));
}

.past-success-section {
    background-color: var(--bg-primary);
}

.past-success-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.past-success-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.past-success-image-container {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.past-success-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.past-success-card:hover .past-success-img {
    transform: scale(1.05);
}

.past-success-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px -10px var(--shadow-color);
    border-color: rgba(0, 98, 155, 0.3);
}

body.dark-theme .past-success-card:hover {
    border-color: rgba(120, 190, 32, 0.3);
}

.past-success-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.past-success-tag {
    font-family: var(--font-mono);
    color: var(--pes-green);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.past-success-title {
    font-family: var(--font-headers);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.past-success-desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 28px;
    flex-grow: 1;
}

.past-success-desc strong {
    color: var(--text-main);
    font-weight: 600;
}

.success-metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.metric-box {
    text-align: center;
}

.metric-val {
    font-family: var(--font-headers);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--ieee-blue);
    display: block;
}

body.dark-theme .metric-val {
    color: var(--accent-color);
}

.metric-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (max-width: 900px) {
    .past-success-grid {
        grid-template-columns: 1fr;
    }
}

/* Control de visibilidad de logos según el tema */
body.light-theme .logo-dark-only {
    display: none !important;
}
body.dark-theme .logo-light-only {
    display: none !important;
}
body.light-theme .logo-light-only {
    display: block !important;
}
body.dark-theme .logo-dark-only {
    display: block !important;
}