/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

/* ===== RESET AND BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* ===== NAVBAR STYLES ===== */
.navbar-custom {
    background: rgba(30, 41, 59, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.75rem;
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9) !important;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem !important;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white !important;
    transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
    background: var(--gradient-success);
    color: white !important;
    box-shadow: var(--shadow-md);
}

/* ===== HERO SECTION ===== */
.hero-section {
    background: var(--gradient-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="%2364b5f6" opacity="0.1"/><circle cx="80" cy="40" r="1.5" fill="%23a5d6a7" opacity="0.08"/><circle cx="40" cy="80" r="1" fill="%23ffb74d" opacity="0.09"/><circle cx="90" cy="10" r="1" fill="%23f48fb1" opacity="0.07"/></svg>');
    background-size: cover;
    /* ¡LA SOLUCIÓN! problema xq no accesa los links */
    z-index: -1; 
}