*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0D0D0D; --surface: #131313; --card: #1A1A1A;
  --text: #FFFFFF; --text-sec: #999999; --text-tert: #666666;
  --primary: #4988C4; --border: #222222;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.gradient-text { background: linear-gradient(135deg, #4988C4, #BDE8F5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.header { position: sticky; top: 0; background: rgba(13,13,13,.8); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 16px 24px; z-index: 50; }
.nav { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-mono); font-size: 24px; font-weight: 700; background: linear-gradient(135deg, #4988C4, #BDE8F5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { font-size: 13px; font-weight: 700; color: var(--text-sec); transition: color .2s; }
.nav-links a:hover { color: var(--text); }

.btn-primary { display: inline-flex; align-items: center; gap: 8px; background: transparent; border: 1px solid var(--primary); color: var(--text); font-weight: 700; font-size: 13px; padding: 10px 20px; border-radius: 12px; cursor: pointer; transition: all 300ms cubic-bezier(0.23, 1, 0.32, 1); }
.btn-primary:hover { background: var(--primary); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.97); transition-duration: 100ms; }
.btn-ghost { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.05); border: 1px solid var(--border); color: var(--text); font-weight: 700; font-size: 13px; padding: 10px 20px; border-radius: 12px; cursor: pointer; transition: all .2s; }
.btn-ghost:hover { background: rgba(255,255,255,.1); transform: translateY(-1px); }
.btn-ghost:active { transform: scale(0.97); transition-duration: 100ms; }
.btn-lg { font-size: 15px; padding: 16px 32px; }
.btn-full { width: 100%; justify-content: center; padding: 14px; }
.btn-link { background: none; border: none; color: var(--primary); font-weight: 700; font-size: 13px; cursor: pointer; }

.hero { position: relative; padding: 96px 24px 128px; overflow: hidden; text-align: center; }
.hero-bg::before { content: ''; position: absolute; top: 25%; left: 50%; transform: translateX(-50%); width: 600px; height: 600px; border-radius: 50%; background: rgba(73,136,196,.15); filter: blur(120px); pointer-events: none; }
.hero-content { max-width: 800px; margin: 0 auto; position: relative; }
.hero h1 { font-size: clamp(2.5rem,5vw,4.5rem); font-weight: 700; line-height: 1.1; margin-bottom: 24px; }
.hero-sub { font-size: clamp(1rem,2vw,1.25rem); color: var(--text-sec); max-width: 600px; margin: 0 auto 48px; line-height: 1.6; font-weight: 500; }
.hero-cta { display: flex; flex-direction: column; gap: 16px; align-items: center; }
@media (min-width:640px) { .hero-cta { flex-direction: row; justify-content: center; } }

.section { padding: 96px 24px; border-top: 1px solid var(--border); }
.container { max-width: 1200px; margin: 0 auto; }
.section-title { font-size: 30px; font-weight: 700; text-align: center; margin-bottom: 64px; }
.text-center { text-align: center; }

.steps-grid { display: grid; gap: 32px; }
@media (min-width:768px) { .steps-grid { grid-template-columns: repeat(3,1fr); } }
.card { background: rgba(255,255,255,.03); border: 1px solid var(--border); border-radius: 16px; padding: 32px; transition: all 400ms cubic-bezier(0.23, 1, 0.32, 1); }
.card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(73,136,196,0.1); }
.step-num { font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: .05em; }
.card h3 { font-size: 20px; font-weight: 700; margin: 12px 0 8px; }
.card p { font-size: 14px; color: var(--text-sec); line-height: 1.6; font-weight: 500; }

.features-grid { display: grid; gap: 24px; }
@media (min-width:768px) { .features-grid { grid-template-columns: repeat(6,1fr); } }

.for-text { max-width: 600px; margin: 0 auto 40px; font-size: 18px; color: var(--text-sec); line-height: 1.6; font-weight: 500; }

.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(4px); }
.modal-box { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 32px; width: 100%; max-width: 448px; }
.modal-x { position: absolute; top: 12px; right: 12px; background: none; border: none; color: var(--text-tert); font-size: 24px; cursor: pointer; }
.modal input, .modal textarea { width: 100%; padding: 12px 16px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; color: var(--text); font-size: 14px; margin-bottom: 16px; outline: none; }
.modal input:focus, .modal textarea:focus { border-color: var(--primary); }
.modal h3 { font-size: 20px; margin-bottom: 8px; }

.success-icon { width: 56px; height: 56px; border-radius: 50%; background: rgba(22,163,74,.1); border: 1px solid rgba(22,163,74,.2); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; font-size: 28px; color: #16A34A; }
.error { color: #DC2626; font-size: 13px; margin-bottom: 12px; }
.hidden { display: none !important; }

.footer { padding: 48px 24px; text-align: center; border-top: 1px solid var(--border); }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; gap: 24px; align-items: center; }
@media (min-width:640px) { .footer-inner { flex-direction: row; justify-content: space-between; } }
.footer-links { display: flex; gap: 32px; font-size: 13px; font-weight: 700; color: var(--text-tert); }
.footer-links a:hover { color: var(--text-sec); }