:root {
    --primary: #FF6B00;
    --primary-dark: #E55A00;
    --dark: #1A1A1A;
    --light: #F8F9FA;
    --gray: #6C757D;
    --white: #FFFFFF;
    --border: #E0E0E0;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; color: var(--dark); background: var(--white); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.main-header { background: var(--white); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1000; }
.header-container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.main-nav ul { display: flex; gap: 30px; }
.main-nav a { font-weight: 500; font-size: 0.95rem; }
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.header-actions { display: flex; gap: 15px; align-items: center; }
.btn-login { font-weight: 600; padding: 8px 16px; }
.btn-download { background: var(--primary); color: var(--white); padding: 10px 20px; border-radius: 50px; font-weight: 600; }
.btn-download:hover { background: var(--primary-dark); }
.mobile-menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* Footer */
.main-footer { background: var(--light); padding: 60px 0 30px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.brand-col h3 { color: var(--primary); margin-bottom: 15px; }
.brand-col p { color: var(--gray); font-size: 0.9rem; margin-bottom: 20px; }
.social-links { display: flex; gap: 15px; }
.social-links a { color: var(--gray); font-size: 1.2rem; }
.footer-col h4 { margin-bottom: 20px; font-size: 1rem; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: var(--gray); font-size: 0.9rem; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--gray); font-size: 0.85rem; }

/* Common */
.hero { padding: 80px 0; display: flex; align-items: center; gap: 50px; }
.hero-content, .hero > div { flex: 1; }
.hero h1 { font-size: 2.8rem; line-height: 1.2; margin-bottom: 20px; }
.hero p { font-size: 1.1rem; color: var(--gray); margin-bottom: 30px; max-width: 500px; }
.btn { display: inline-block; padding: 14px 28px; border-radius: 50px; font-weight: 600; cursor: pointer; border: none; text-align:center; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 2.2rem; margin-bottom: 15px; }
.section-title p { color: var(--gray); max-width: 600px; margin: 0 auto; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.card { background: var(--white); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: transform 0.3s; }
.card:hover { transform: translateY(-5px); }
.card-icon { font-size: 2rem; color: var(--primary); margin-bottom: 20px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--gray); font-size: 0.95rem; }
.card.orange-bg { background: var(--primary); color: var(--white); border-color: var(--primary); }
.card.orange-bg p { color: rgba(255,255,255,0.9); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.95rem; font-family: inherit; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

@media (max-width: 768px) {
    .main-nav, .header-actions { display: none; }
    .mobile-menu-toggle { display: block; }
    .hero { flex-direction: column; text-align: center; }
    .hero p { margin: 0 auto 30px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}