/* Design System & Reset */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --dark: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --white: #ffffff;
    --radius: 1rem;
    --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 100px 0;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--dark);
    line-height: 1.2;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 9999px;
    font-weight: 700;
    cursor: pointer;
    font-size: 1rem;
    border: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

/* Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    padding: 1.5rem 0;
    transition: var(--transition);
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--dark);
}

.nav-links a:hover {
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Nav Overlay */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    transform: translateY(-100%);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-overlay.active {
    transform: translateY(0);
}

.nav-overlay a {
    font-size: 2rem;
    font-weight: 800;
    margin: 1.5rem 0;
}

.close-menu {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 2rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    background: radial-gradient(circle at 70% 30%, #dbeafe 0%, transparent 50%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: #1e3a8a;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
}

.hero-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 10px solid white;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Card Style */
.card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05);
    border: 1px solid #f1f5f9;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
}

/* Footer */
footer {
    background-color: #0f172a;
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 1.5rem;
    display: block;
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links ul li a {
    color: #94a3b8;
}

.footer-links ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #1e293b;
    color: #64748b;
    font-size: 0.875rem;
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    z-index: 1000;
    font-size: 30px;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-content p { margin-left: auto; margin-right: auto; }
    .hero-btns { justify-content: center; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 3rem; }
}