:root {
  --blue: #2B6D92;
  --orange: #F7931E;
  --bg: #ffffff;
  --text: #222222;
  --muted: #666;
  --card-bg: #f9f9f9;
  --input-bg: #ffffff;
  --border: #dddddd;
}
[data-theme="dark"] {
  --bg: #101214;
  --text: #f0f0f0;
  --muted: #b5b5b5;
  --card-bg: #1c1f22;
  --input-bg: #1b1e20;
  --border: #333;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background .3s, color .3s;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
header {
  background: var(--blue);
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  position: sticky; top: 0; z-index: 1000;
}
header .brand { display: flex; align-items: center; gap: 10px; }
header .brand img { height: 40px; }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: #fff; font-weight: 500; }
nav a.active { text-decoration: underline; text-underline-offset: 4px; }
.theme-toggle {
  background: transparent; border: 2px solid #fff; color: #fff;
  border-radius: 50%; width: 36px; height: 36px; cursor: pointer;
  display: grid; place-items: center; font-size: 18px;
}
.theme-toggle:hover { background: rgba(255,255,255,.2); }
.hero {
  background: linear-gradient(135deg, var(--blue), var(--orange));
  color: #fff;
  text-align: center;
  padding: 90px 20px;
}
.hero h1 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin: 0 0 10px; }
.hero p { font-size: 1.1rem; margin: 0 0 20px; }
.btn {
  display: inline-block; background: #fff; color: var(--blue);
  padding: 12px 22px; border-radius: 8px; font-weight: 600;
}
.section { padding: 60px 20px; max-width: 1100px; margin: auto; }
.section h2 { color: var(--blue); text-align: center; margin: 0 0 30px; }
.muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  background: var(--card-bg); color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,.06);
  transition: transform .2s;
}
.card:hover { transform: translateY(-4px); }
.card h3 { color: var(--orange); margin: 0 0 6px; }
form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
label { display: block; font-weight: 600; margin: 10px 0 6px; }
input, textarea {
  width: 100%; padding: 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--input-bg); color: var(--text);
}
input::placeholder, textarea::placeholder { color: #999; }
button, .btn-primary {
  background: var(--blue); color: #fff; border: none;
  padding: 12px 18px; border-radius: 8px; cursor: pointer;
}
.btn-outline {
  background: transparent; color: var(--blue); border: 2px solid var(--blue);
  padding: 10px 16px; border-radius: 8px;
}
footer {
  background: var(--blue); color: #fff;
  padding: 30px 20px; text-align: center; margin-top: 40px;
}
footer a { color: #ffe0bf; }
.center { text-align: center; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row .full { grid-column: 1 / -1; }
@media (max-width: 768px) { .row { grid-template-columns: 1fr; } }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .5s, transform .5s; }
.reveal.visible { opacity: 1; transform: translateY(0); }