/* Base Styles & Reset */
:root {
    --primary: #0F172A;
    --primary-foreground: #F8FAFC;
    --secondary: #06B6D4;
    --secondary-foreground: #0F172A;
    --background: #F8FAFC;
    --foreground: #334155;
    --muted: #F1F5F9;
    --muted-foreground: #64748B;
    --border: #E2E8F0;
    --font-sans: 'Open Sans', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

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

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }

.hidden { display: none; }
.block { display: block; }

.text-center { text-align: center; }
.text-white { color: white; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-muted { color: var(--muted-foreground); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-white { background-color: white; }
.bg-slate-50 { background-color: #f8fafc; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }

.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

.shadow-sm { box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1); }

.border { border: 1px solid var(--border); }

/* Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: #1e293b;
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--secondary-foreground);
}

.btn-secondary:hover {
    opacity: 0.9;
}

.btn-outline {
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    background: transparent;
}

.btn-outline:hover {
    background-color: rgba(255,255,255,0.1);
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    border-bottom: 1px solid var(--border);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--foreground);
}

.nav-link:hover, .nav-link.active {
    color: var(--secondary);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

.mobile-menu.open {
    display: block;
}

/* Hero Section */
.hero {
    position: relative;
    background-color: var(--primary);
    overflow: hidden;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: radial-gradient(#ffffff 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Cards */
.service-card {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

/* Footer */
footer {
    background-color: var(--primary);
    color: var(--primary-foreground);
    padding-top: 4rem;
    padding-bottom: 2rem;
}

/* Sticky WhatsApp */
.sticky-wa {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 50;
    background-color: #25D366;
    color: white;
    padding: 1rem;
    border-radius: 9999px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sticky-wa:hover {
    transform: scale(1.1);
    background-color: #20bd5a;
}

/* Responsive */
@media (min-width: 768px) {
    .md\:block { display: block; }
    .md\:hidden { display: none; }
    .md\:flex { display: flex; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
    .md\:w-1\/3 { width: 33.333333%; }
    .md\:w-2\/3 { width: 66.666667%; }
    .md\:flex-row { flex-direction: row; }
    .md\:flex-row-reverse { flex-direction: row-reverse; }
    .md\:text-left { text-align: left; }
    .md\:text-5xl { font-size: 3rem; }
    .md\:py-24 { padding-top: 6rem; padding-bottom: 6rem; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:text-6xl { font-size: 3.75rem; }
}