/* ========================================
   RCICAE - Red de Científicos Argentinos en España
   Estilos principales
   ======================================== */

/* Variables CSS - Colores Argentina */
:root {
    /* Bandera Argentina */
    --color-celeste: #75AADB;
    --color-celeste-claro: #8FC9E8;
    --color-celeste-oscuro: #5B8FB9;
    --color-blanco: #FFFFFF;
    --color-sol: #FCBF49;
    --color-sol-oscuro: #E5A52B;
    
    /* Colores base */
    --color-text: #2C3E50;
    --color-text-light: #5A6C7D;
    --color-bg: #FFFFFF;
    --color-bg-light: #F5F9FC;
    --color-bg-gradient: linear-gradient(135deg, #75AADB 0%, #5B8FB9 100%);
    --color-border: #D1E3F0;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 5rem;
    --spacing-xl: 8rem;
    
    /* Bordes */
    --border-radius: 12px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;
    
    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(117, 170, 219, 0.15);
    --shadow-md: 0 4px 16px rgba(117, 170, 219, 0.2);
    --shadow-lg: 0 12px 40px rgba(117, 170, 219, 0.25);
    --shadow-glow: 0 0 30px rgba(117, 170, 219, 0.4);
    
    /* Transiciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Google Fonts - Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Utilidades */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-sol) 0%, var(--color-sol-oscuro) 100%);
    color: var(--color-text);
    box-shadow: 0 4px 15px rgba(252, 191, 73, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(252, 191, 73, 0.5);
    color: var(--color-text);
}

.btn-secondary {
    background: var(--color-blanco);
    color: var(--color-celeste);
    border: 2px solid var(--color-celeste);
}

.btn-secondary:hover {
    background: var(--color-celeste);
    color: var(--color-blanco);
    transform: translateY(-3px);
}

/* ========================================
   Header / Navegación
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(117, 170, 219, 0.15);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

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

.logo-img {
    height: 90px;
    width: auto;
    transition: var(--transition);
}

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

/* Menú móvil */
.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 5px;
}

.hamburger {
    width: 28px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-celeste), var(--color-celeste-oscuro));
    border-radius: 3px;
    transition: var(--transition);
}

/* Navegación desktop */
.nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-celeste), var(--color-celeste-oscuro));
    border-radius: 2px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-celeste);
    background: rgba(117, 170, 219, 0.08);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 20px;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    margin-top: 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(117, 170, 219, 0.85) 0%, rgba(91, 143, 185, 0.9) 50%, rgba(143, 201, 232, 0.85) 100%),
                url('../images/fondo.png') center/cover no-repeat;
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(252,191,73,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    color: var(--color-blanco);
    text-shadow: 0 4px 20px rgba(0,0,0,0.15);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.75rem);
    margin-bottom: 2.5rem;
    color: rgba(255,255,255,0.95);
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.hero .btn-primary {
    background: linear-gradient(135deg, var(--color-sol) 0%, var(--color-sol-oscuro) 100%);
    color: var(--color-text);
    font-size: 1.1rem;
    padding: 1.25rem 3rem;
}

.hero .btn-primary:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 12px 40px rgba(252, 191, 73, 0.5);
}

/* ========================================
   Secciones generales
   ======================================== */
.section {
    padding: var(--spacing-lg) 0;
    position: relative;
}

.section:nth-child(even) {
    background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-celeste), var(--color-sol), var(--color-celeste));
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.2rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========================================
   Quiénes Somos
   ======================================== */
.quienes-somos {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
}

.coordinadores {
    margin-top: var(--spacing-lg);
}

.coordinadores-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    font-weight: 700;
}

.coordinadores-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.coordinador-card {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-bounce);
    border: 1px solid var(--color-border);
}

.coordinador-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-celeste);
}

.coordinador-avatar {
    width: 130px;
    height: 130px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-celeste) 0%, var(--color-celeste-claro) 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-blanco);
    text-shadow: 0 2px 10px rgba(0,0,0,0.15);
    letter-spacing: 2px;
}

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

.coordinador-card h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 700;
}

.coordinador-role {
    color: var(--color-celeste);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   Objetivos
   ======================================== */
.objetivos {
    background: var(--color-bg);
}

.objetivos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.objetivo-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-bounce);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.objetivo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-celeste), var(--color-sol), var(--color-celeste));
    transform: scaleX(0);
    transition: var(--transition);
}

.objetivo-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-celeste);
}

.objetivo-card:hover::before {
    transform: scaleX(1);
}

.objetivo-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    transition: var(--transition-bounce);
}

.objetivo-card:hover .objetivo-icon {
    transform: scale(1.2) rotate(10deg);
}

.objetivo-card h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 700;
}

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

/* ========================================
   Registro (Form Placeholder)
   ======================================== */
.registro {
    background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
}

.form-placeholder {
    max-width: 650px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
    border: 2px dashed var(--color-celeste);
    position: relative;
    overflow: hidden;
}

.form-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(117, 170, 219, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.form-placeholder-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.form-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    color: var(--color-celeste);
    background: linear-gradient(135deg, var(--color-celeste-claro), var(--color-celeste));
    border-radius: 50%;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-placeholder h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 700;
}

.form-placeholder p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    font-size: 1.05rem;
}

.form-note {
    font-size: 0.95rem;
    color: var(--color-celeste);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 2px solid var(--color-border);
    font-weight: 600;
}

/* ========================================
   Contacto
   ======================================== */
.contacto {
    background: var(--color-bg);
}

.contacto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.contacto-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-bounce);
    border: 1px solid var(--color-border);
}

.contacto-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-celeste);
}

.contacto-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    transition: var(--transition-bounce);
}

.contacto-card:hover .contacto-icon {
    transform: scale(1.15);
}

.contacto-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 700;
}

.contacto-card a {
    color: var(--color-celeste);
    font-weight: 600;
    font-size: 1rem;
}

.contacto-card a:hover {
    color: var(--color-celeste-oscuro);
    text-decoration: underline;
}

/* Mapa */
.mapa-container {
    margin-top: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.mapa-container iframe {
    width: 100%;
    height: 450px;
    border: none;
    display: block;
    border-radius: var(--border-radius-xl);
}

@media (max-width: 768px) {
    .mapa-container iframe {
        height: 300px;
    }
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--color-celeste-oscuro) 0%, var(--color-celeste) 100%);
    color: var(--color-blanco);
    padding: var(--spacing-md) 0;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.footer-note {
    font-size: 0.9rem;
    opacity: 0.85;
}

/* ========================================
   Scroll to top
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, var(--color-sol) 0%, var(--color-sol-oscuro) 100%);
    color: var(--color-text);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-bounce);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 15px 40px rgba(252, 191, 73, 0.5);
}

.scroll-top svg {
    width: 26px;
    height: 26px;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: var(--transition);
        border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    }
    
    .nav.active {
        max-height: 450px;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-sm) 0;
        gap: 0.25rem;
    }
    
    .nav-link {
        display: block;
        padding: 1rem var(--spacing-md);
        margin: 0 var(--spacing-sm);
        border-radius: var(--border-radius);
    }
    
    .nav-link::after {
        display: none;
    }
    
    /* Animación hamburguesa */
    .menu-toggle.active .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
        background: var(--color-celeste);
    }
    
    .menu-toggle.active .hamburger:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
        background: var(--color-celeste);
    }
    
    .hero {
        margin-top: 70px;
        min-height: 80vh;
    }
    
    .coordinadores-grid,
    .objetivos-grid,
    .contacto-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title::after {
        width: 60px;
    }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .coordinadores-grid,
    .objetivos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeIn 0.6s ease-out;
}