@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700;900&display=swap');

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

:root {
  --sky: #0ea5e9;
  --sky-mid: #0284c7;
  --sky-deep: #075985;
  --ink: #0c1520;
  --ink2: #1e2d3d;
  --muted: #5a7a94;
  --pale: #f0f8ff;
  --border: #cce4f0;
  --white: #ffffff;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Roboto', sans-serif;
  background: var(--white);
  color: var(--ink);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 64px;
  padding: 0 56px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-weight: 800; font-size: 18px;
  color: var(--ink); text-decoration: none;
  letter-spacing: -0.3px;
  display: flex; align-items: center; gap: 10px;
}

.logo-mark {
  width: 32px; height: 32px;
  background: var(--sky-deep);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}

.logo-mark svg { width: 18px; height: 18px; }

.nav-right { display: flex; align-items: center; gap: 36px; }

.nav-right a {
  font-size: 14px; font-weight: 500;
  color: var(--muted); text-decoration: none;
  transition: color 0.2s;
}

.nav-right a:hover { color: var(--ink); }

.nav-cta {
  background: var(--sky-deep) !important;
  color: var(--white) !important;
  padding: 9px 20px;
  border-radius: 8px;
  font-weight: 600 !important;
  font-size: 13px !important;
  transition: background 0.2s !important;
}

.nav-cta:hover { background: var(--ink) !important; }

/* FOOTER */
footer {
  background: var(--ink);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 36px 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.f-logo {
  font-size: 15px; font-weight: 700;
  color: rgba(255,255,255,0.5);
  display: flex; align-items: center; gap: 8px;
  text-decoration: none;
}

.f-logo-mark {
  width: 24px; height: 24px;
  background: var(--sky-deep);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
}

.f-logo-mark svg { width: 13px; height: 13px; }

.f-links { display: flex; gap: 24px; flex-wrap: wrap; }
.f-links a { font-size: 12px; color: rgba(255,255,255,0.3); text-decoration: none; transition: color 0.2s; }
.f-links a:hover { color: rgba(255,255,255,0.7); }
.f-copy { font-size: 11px; color: rgba(255,255,255,0.2); }

/* FLOAT BUTTON */
.float-btn {
  position: fixed; bottom: 28px; right: 28px;
  z-index: 999;
  display: flex; flex-direction: column; align-items: flex-end; gap: 10px;
}

.float-tip {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 13px; font-weight: 500;
  color: var(--ink);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  white-space: nowrap;
  animation: fadeUp 0.3s ease 3s both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.float-circle {
  width: 54px; height: 54px;
  background: #0866ff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(8,102,255,0.4);
  text-decoration: none;
  transition: transform 0.2s;
  animation: popIn 0.4s ease 2.5s both;
  position: relative;
}

@keyframes popIn {
  0% { opacity: 0; transform: scale(0.6); }
  80% { transform: scale(1.06); }
  100% { opacity: 1; transform: scale(1); }
}

.float-circle:hover { transform: scale(1.06); }

.float-online {
  position: absolute; top: 1px; right: 1px;
  width: 14px; height: 14px;
  background: #22c55e;
  border-radius: 50%;
  border: 2px solid var(--white);
}

@media (max-width: 960px) {
  nav { padding: 0 24px; }
  .nav-right a:not(.nav-cta) { display: none; }
  footer { padding: 28px 24px; flex-direction: column; text-align: center; }
  .float-tip { display: none; }
}