/* ========================================================
   VARIABLES GLOBALES (Escala en múltiplos de 3)
   ======================================================== */
:root {
    /* Cromática Oficial Conecta YT */
    --cyt-primary: #00629b;
    --cyt-secondary: #ef4036;
    
    /* Neutros */
    --bg-light: #ffffff;
    --bg-gray: #f4f6f8; /* Gris muy sutil para descanso visual */
    --text-dark: #000000;
    --text-muted: #4a4a4a;
    
    /* Tipografías */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Sistema de Espaciado (Base 3px = 0.1875rem) */
    --space-sm: 0.75rem;   /* 12px */
    --space-md: 1.5rem;    /* 24px */
    --space-lg: 3rem;      /* 48px */
    --space-xl: 4.5rem;    /* 72px */
    --space-xxl: 6rem;     /* 96px */
}

/* ========================================================
   RESETEO BASE
   ======================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ========================================================
   TIPOGRAFÍA Y JERARQUÍA
   ======================================================== */
h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--cyt-primary);
    line-height: 1.1;
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

.body-large {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.text-white {
    color: var(--bg-light);
}

/* ========================================================
   HEADER & LOGO (Proporción exacta y centrado)
   ======================================================== */
.main-header {
    /* El padding respeta el múltiplo de 3 para el aire superior e inferior */
    padding: var(--space-sm) 0; 
    border-bottom: 1px solid rgba(0, 98, 155, 0.1);
    background-color: var(--bg-light);
}

.header-container {
    display: flex;
    justify-content: center; /* Fuerza el centrado absoluto del logo */
    align-items: center;
}

.header-container a {
    display: block;
    /* La proporción exacta de tu mesa de trabajo 1821.21 x 600 */
    aspect-ratio: 1821.21 / 600; 
    /* El ancho máximo define el tamaño visual sin romper la proporción */
    width: 100%;
    max-width: 340px; 
    height: auto;
}

.main-logo {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Garantiza que la imagen no se deforme */
    display: block;
}
/* ========================================================
   HEADER ANCLADO (Sticky / Azul #00629b)
   ======================================================== */
.main-header.is-sticky {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--cyt-primary); /* Azul oficial #00629b */
    padding: var(--space-sm) 0;
    border-bottom: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.4s ease-out;
}

/* Tamaño de logo ajustado a 130px */
.main-header.is-sticky .header-container a {
    max-width: 130px;
}

/* Transforma cualquier logo (SVG o PNG) a blanco puro */
.main-header.is-sticky .main-logo {
    filter: brightness(0) invert(1);
}

/* Animación de entrada suave */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ========================================================
   ANIMACIÓN DE SALIDA (Escala y Transparencia)
   ======================================================== */
.main-header.is-exiting {
    /* Mantiene las propiedades del sticky mientras se anima la salida */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--cyt-primary);
    padding: var(--space-sm) 0;
    border-bottom: none;
    
    /* Nueva animación de salida */
    animation: fadeScaleOut 0.4s ease-in-out forwards;
}

.main-header.is-exiting .header-container a {
    max-width: 130px;
}

.main-header.is-exiting .main-logo {
    filter: brightness(0) invert(1);
}

/* El keyframe que crea el efecto de crecer y desaparecer */
@keyframes fadeScaleOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(1.05); /* Crece ligeramente simulando volver al logo grande */
    }
}

/* ========================================================
   HERO SECTION
   ======================================================== */
.hero-section {
    padding: var(--space-xl) 0 var(--space-xxl);
}

.badge {
    display: inline-block;
    background-color: rgba(239, 64, 54, 0.1);
    color: var(--cyt-secondary);
    padding: 6px 12px;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 30px; /* Bordes redondeados sutiles */
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.manifesto-box {
    max-width: 800px;
    border-left: 3px solid var(--cyt-secondary);
    padding-left: var(--space-md);
    margin-top: var(--space-lg);
}

/* ========================================================
   VARIABLES ESPECÍFICAS DE TARJETAS (Cromática Oficial)
   ======================================================== */
:root {
    /* Paleta Conecta Empresas */
    --ce-primary: #112e42;
    --ce-secondary-1: #00629b;
    --ce-secondary-2: #ef4036;

    /* Paleta Conecta Universidades */
    --cu-primary: #9d7cb0;
    --cu-secondary: #00bcca;
}

/* ========================================================
   ECOSISTEMA DUAL (CSS GRID)
   ======================================================== */
.ecosystem-section {
    background-color: var(--bg-gray);
    padding: var(--space-xl) 0;
}

.grid-dual {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

/* Base Estructural de la Tarjeta */
.card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

/* --------------------------------------------------------
   TARJETA 1: CONECTA EMPRESAS (Bento Box / Estático)
   -------------------------------------------------------- */
.card-empresas {
    background: var(--bg-light);
    border: 1px solid rgba(17, 46, 66, 0.15); /* Divisor sutil corporativo */
    border-top: 3px solid var(--ce-primary);
    border-radius: 2px; /* Corte recto y formal */
    box-shadow: 0 12px 24px rgba(0,0,0,0.03);
}

.card-empresas:hover {
    transform: translateY(-6px);
    border-top-color: var(--ce-secondary-1); /* #00629b al interactuar */
}

.card-empresas .card-desc {
    color: var(--ce-primary);
}

/* --------------------------------------------------------
   TARJETA 2: CONECTA UNIVERSIDADES (Cinético / Tribal)
   -------------------------------------------------------- */
.card-universidades {
    background-color: var(--ce-primary); /* Fondo oscuro reduce fatiga */
    border: 1px solid rgba(157, 124, 176, 0.3);
    border-radius: 24px; /* Rompe la rigidez con curvas orgánicas */
    box-shadow: 0 8px 32px rgba(157, 124, 176, 0.15); /* Glow Púrpura #9d7cb0 */
}

.card-universidades:hover {
    transform: translateY(-6px) scale(1.02); /* Efecto de levitación */
    box-shadow: 0 12px 40px rgba(0, 188, 202, 0.34); /* Resplandor Neón Cian #00bcca */
}

.card-universidades .card-desc {
    color: rgba(255, 255, 255, 0.85); /* Legibilidad sobre oscuro */
}

/* ========================================================
   HEADER DE TARJETAS, LOGOS Y ETIQUETAS
   ======================================================== */
.card-header {
    display: flex;
    flex-direction: column; /* Apila el logo arriba y la etiqueta abajo */
    align-items: flex-start; /* Asegura que todo quede alineado a la izquierda */
    gap: var(--space-md); /* Añade espacio vertical entre el logo y la etiqueta */
    margin-bottom: var(--space-md);
}

/* Logos que reemplazan a los H3 */
.card-logo {
    max-width: 300px; /* Tamaño controlado y elegante */
    height: auto;
    object-fit: contain;
    display: block;
    transform: translateX(-10px);
}

/* Ajuste de color automático si subes los logos en negro puro SVG */
.logo-ce {
    /* Si el logo CE está en SVG negro, esto no afecta, mantiene sus colores. */
}
/*.logo-cu {
    /* Invierte a blanco el logo de Universidades para que contraste en el fondo oscuro */
    filter: brightness(0) invert(1); 
}*/

/* Etiquetas (Tags) */
.tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 4px 10px;
    font-weight: 700;
    text-transform: uppercase;
    line-height: 1;
}

.tag-ce {
    padding: 4px 10px;
    background-color: rgba(0, 98, 155, 0.1);
    color: var(--ce-secondary-1); /* #00629b */
    border: 1px solid rgba(0, 98, 155, 0.2);
    border-radius: 2px; /* Etiqueta corporativa estática */
}

.tag-cu {
    padding: 4px 10px;
    background-color: rgba(0, 188, 204, 0.15);
    color: var(--cu-secondary); /* #00bcca */
    border: 1px solid rgba(0, 188, 204, 0.3);
    border-radius: 12px; /* Etiqueta fluida y juvenil */
}
/* ========================================================
   CONTACTO ANTICIPADO (NUEVO DISEÑO TARJETAS)
   ======================================================== */
.contact-section { background-color: var(--cyt-primary); padding: var(--space-xl) 0; }
.contact-container { text-align: center; }
.contact-subtitle { margin-bottom: var(--space-lg); font-size: 1.125rem; opacity: 0.9; }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); /* 2 columnas en PC, 1 en Móvil */
    gap: var(--space-md);
    max-width: 1000px;
    margin: 0 auto;
    text-align: left; /* Textos a la izquierda dentro de las tarjetas */
}

/* Base Tarjeta Contacto */
.action-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease;
}
.action-card:hover { transform: translateY(-5px); }
.card-title { font-size: 1.5rem; font-weight: 700; margin-bottom: var(--space-sm); }
.card-text { font-size: 1rem; margin-bottom: var(--space-lg); line-height: 1.5; }

/* Estilo Tarjeta B2B (Empresas - Rigor Corporativo) */
.b2b-card {
    background-color: var(--bg-light);
    border-radius: 4px; /* Bordes rectos corporativos */
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.b2b-card .card-title { color: var(--ce-primary); }
.b2b-card .card-text { color: var(--text-muted); }

/* Estilo Tarjeta B2C (Universidades - Tribal) */
.b2c-card {
    background-color: var(--ce-primary); /* Fondo oscuro */
    border-radius: 24px; /* Bordes redondeados orgánicos */
    border: 1px solid rgba(0, 188, 204, 0.3);
    box-shadow: 0 10px 30px rgba(17, 46, 66, 0.5);
}

/* ========================================================
   SISTEMA DE BOTONES (B2B y B2C)
   ======================================================== */
.btn {
    display: inline-block; padding: 12px 24px; font-family: var(--font-heading);
    font-weight: 700; text-decoration: none; text-align: center; transition: all 0.3s ease;
}

/* Botón Rojo Sólido (B2B) */
.btn-solid-red {
    background-color: var(--cyt-secondary); color: var(--bg-light);
    border: 2px solid var(--cyt-secondary); border-radius: 4px;
    width: 100%; /* Ocupa el 100% de la tarjeta en ancho */
}
.btn-solid-red:hover { 
    background-color: #d1362d; border-color: #d1362d; 
    box-shadow: 0 4px 12px rgba(239, 64, 54, 0.4); 
}

/* Agrupador Botones B2C (Universidades) */
.btn-group-horizontal {
    display: flex; gap: var(--space-sm); flex-wrap: wrap;
}

/* Botón Cian Sólido (B2C Asistentes - Llamado principal) */
.btn-solid-cyan {
    background-color: var(--cu-secondary); color: var(--ce-primary);
    border: 2px solid var(--cu-secondary); border-radius: 50px;
    flex: 1; min-width: 180px; /* Flexbox para distribuir espacio equitativamente */
}
.btn-solid-cyan:hover { 
    background-color: #009ba6; border-color: #009ba6; 
    transform: scale(1.02); box-shadow: 0 0 15px var(--cu-secondary); /* Resplandor Glow Sutil */
}
.btn-solid-cyan:active { transform: scale(0.98); }

/* Botón Outline Blanco (B2C Sponsors - Llamado secundario) */
.btn-outline-white {
    background-color: transparent; color: var(--bg-light);
    border: 2px solid var(--bg-light); border-radius: 50px;
    flex: 1; min-width: 180px;
}
.btn-outline-white:hover { 
    background-color: rgba(255,255,255,0.1); 
    box-shadow: 0 0 15px rgba(255,255,255,0.3); 
}

/* ========================================================
   MEDIA QUERIES (Responsividad para Móviles)
   ======================================================== */
@media (max-width: 768px) {
    .btn-group-horizontal { flex-direction: column; }
    .btn-solid-cyan, .btn-outline-white { width: 100%; }
}

/* ========================================================
   FOOTER
   ======================================================== */
.main-footer {
    background-color: var(--text-dark);
    color: var(--bg-light);
    padding: var(--space-md) 0;
    font-size: 0.875rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.hashtags span {
    margin-left: 12px;
    color: var(--text-muted);
}