/* =====================================================
   EXPOTEC III - Estilos Principales
   III ENCUENTRO CIENTÍFICO Y TECNOLÓGICO
   ===================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #0d1b4a;
    --primary-light: #1a2f6e;
    --primary-dark: #060e2a;
    --secondary: #00796b;
    --secondary-light: #009688;
    --secondary-dark: #004d40;
    --accent: #f9a825;
    
    --gradient-primary: linear-gradient(135deg, #0d1b4a 0%, #1a2f6e 50%, #00796b 100%);
    --gradient-hero: linear-gradient(135deg, #0d1b4a 0%, #1a237e 30%, #00695c 70%, #004d40 100%);
    --gradient-accent: linear-gradient(135deg, #f9a825 0%, #ff8f00 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(255,255,255,0.8));
    
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-800: #1e293b;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --font-primary: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 16px; line-height: 1.6; color: var(--gray-800);
    background: var(--gray-50); overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-primary); font-weight: 700; color: var(--primary); }
a { text-decoration: none; color: var(--secondary); transition: var(--transition); }
a:hover { color: var(--secondary-light); }
img { max-width: 100%; height: auto; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 4px; }

/* Utilities & Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.animate-fade-in-up { animation: fadeInUp 0.8s ease forwards; }

.btn-expotec {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 32px; background: var(--gradient-accent);
    color: var(--primary-dark) !important; font-family: var(--font-primary); font-weight: 700;
    border: none; border-radius: var(--radius-full); cursor: pointer; transition: var(--transition);
    box-shadow: 0 4px 15px rgba(249, 168, 37, 0.4); text-transform: uppercase;
}
.btn-expotec:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(249, 168, 37, 0.5); }

.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 2.5rem; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.section-title p { color: #64748b; max-width: 600px; margin: 0 auto; }
.section-title .divider { width: 80px; height: 4px; background: var(--gradient-accent); border-radius: 2px; margin: 16px auto 0; }

.glass-card { background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(20px); border: 1px solid rgba(255, 255, 255, 0.3); border-radius: var(--radius-lg); box-shadow: var(--shadow); transition: var(--transition); }
.glass-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }

.loading-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(13, 27, 74, 0.9); display: flex; align-items: center; justify-content: center; z-index: 9999; transition: opacity 0.5s ease; }
.loading-overlay.hide { opacity: 0; pointer-events: none; }
@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.loader { width: 50px; height: 50px; border: 3px solid rgba(255, 255, 255, 0.2); border-top-color: var(--accent); border-radius: 50%; animation: rotate 0.8s linear infinite; }