/* FILE: css/main.css */
:root { --bg-color: #0f172a; --card-bg: #1e293b; --accent-color: #38bdf8; --text-main: #ffffff; --text-muted: #94a3b8; --border-color: rgba(56, 189, 248, 0.2); --transition-fast: all 0.2s ease; --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1); --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4); --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-family: var(--font-main); background-color: var(--bg-color); color: var(--text-main); }
body { line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.2; color: var(--text-main); }
img { max-width: 100%; display: block; }
.reveal { opacity: 0; transform: translateY(30px); transition: var(--transition-smooth); }
.reveal.active { opacity: 1; transform: translateY(0); }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-title { font-size: 2.5rem; font-weight: 700; }
.grid { display: grid; gap: 32px; }
.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.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-sm { gap: 16px; }
.gap-md { gap: 24px; }
.gap-lg { gap: 32px; }
.navbar { position: fixed; top: 0; left: 0; width: 100%; background-color: rgba(15, 23, 42, 0.85); backdrop-filter: blur(12px); z-index: 1000; border-bottom: 1px solid var(--border-color); }
.nav-content { height: 70px; display: flex; justify-content: space-between; align-items: center; }
.nav-brand { font-size: 1.5rem; font-weight: 700; color: var(--accent-color); }
.nav-links { display: flex; gap: 32px; }
.nav-link:hover, .nav-link.active { color: var(--accent-color); }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 24px; border-radius: 8px; font-weight: 600; cursor: pointer; border: none; transition: var(--transition-fast); font-family: var(--font-main); }
.btn-primary { background-color: var(--accent-color); color: var(--bg-color); }
.btn-primary:hover { background-color: #0284c7; transform: translateY(-2px); }
.btn-outline { background-color: transparent; border: 2px solid var(--accent-color); color: var(--accent-color); }
.btn-outline:hover { background-color: var(--accent-color); color: var(--bg-color); transform: translateY(-2px); }
.card { background-color: var(--card-bg); border-radius: 16px; overflow: hidden; transition: var(--transition-smooth); border: 1px solid transparent; }
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--border-color); }
.badge { background-color: rgba(56, 189, 248, 0.1); color: var(--accent-color); padding: 6px 12px; border-radius: 20px; font-size: 0.875rem; font-weight: 600; }
.badge.active, .badge.clickable:hover { background-color: var(--accent-color); color: var(--bg-color); cursor: pointer; }
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background-color: var(--border-color); }
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item::before { content: ''; position: absolute; left: -37px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background-color: var(--accent-color); border: 4px solid var(--bg-color); }
.form-group { margin-bottom: 24px; }
.form-control { width: 100%; padding: 16px; background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-main); font-family: var(--font-main); transition: var(--transition-fast); }
.form-control:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2); }
.footer { background-color: var(--card-bg); padding: 40px 0; margin-top: 80px; border-top: 1px solid var(--border-color); }
#back-to-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; border-radius: 50%; background-color: var(--accent-color); color: var(--bg-color); border: none; font-size: 1.5rem; cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: var(--transition-fast); z-index: 99; }
#back-to-top.visible { opacity: 1; visibility: visible; }
#back-to-top:hover { transform: translateY(-4px); }
.hamburger { display: none; background: none; border: none; cursor: pointer; width: 30px; height: 20px; position: relative; z-index: 1001; }
.hamburger span { display: block; width: 100%; height: 2px; background-color: var(--text-main); position: absolute; transition: var(--transition-fast); }
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { bottom: 0; }
@media (max-width: 768px) { .hamburger { display: block; } .nav-links { position: fixed; top: 0; right: -100%; width: 100%; height: 100vh; background-color: var(--bg-color); flex-direction: column; justify-content: center; align-items: center; transition: var(--transition-smooth); } .nav-links.open { right: 0; } .grid-cols-2 { grid-template-columns: 1fr; } .section { padding: 60px 0; } }