:root {
  color-scheme: dark;
  --bg: #050a30;
  --panel: rgba(13, 25, 76, 0.78);
  --line: rgba(54, 214, 238, 0.28);
  --text: #f7f9ff;
  --muted: #b8c3de;
  --accent: #20d5e9;
  --accent-2: #0877f9;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 10%, rgba(32, 213, 233, .13), transparent 34rem),
    radial-gradient(circle at 10% 85%, rgba(8, 119, 249, .16), transparent 36rem),
    var(--bg);
  line-height: 1.65;
}

a { color: #63e7f4; }

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 32px;
}

/* Language Switcher Dropdown */
.dropdown { position: relative; display: inline-block; }
.dropbtn {
  background: var(--panel);
  color: var(--text);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}
.dropbtn:hover { border-color: var(--accent); }
.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  background-color: #0b153a;
  min-width: 140px;
  box-shadow: 0px 8px 24px rgba(0,0,0,0.4);
  z-index: 100;
  border-radius: 14px;
  border: 1px solid var(--line);
  margin-top: 0; /* Remove gap */
  padding-top: 4px; /* Internal spacing instead of external margin */
  overflow: hidden;
}
/* Invisible bridge to keep hover active */
.dropdown-content::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  height: 20px;
}
.dropdown-content a {
  color: var(--muted);
  padding: 10px 16px;
  text-decoration: none;
  display: block;
  font-size: 0.88rem;
  transition: background 0.2s;
}
.dropdown-content a:hover { background-color: var(--line); color: var(--text); }
.dropdown-content a.active { color: var(--accent); font-weight: bold; }
.dropdown:hover .dropdown-content { display: block; }

.brand { display: flex; align-items: center; gap: 13px; color: var(--text); text-decoration: none; }
.brand img { width: 46px; height: 46px; object-fit: contain; }
.brand strong { font-size: 1.08rem; letter-spacing: .08em; }

.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 12px;
}
.nav a:hover, .nav a:focus-visible { color: var(--text); border-color: var(--line); outline: none; }

.hero, .card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 18px 70px rgba(0, 0, 0, .22);
  backdrop-filter: blur(18px);
}

.hero { padding: clamp(28px, 6vw, 64px); border-radius: 28px; }
.eyebrow { margin: 0 0 9px; color: var(--accent); font-weight: 750; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
h1 { margin: 0; font-size: clamp(2rem, 7vw, 4rem); line-height: 1.08; letter-spacing: -.04em; }
.lead { max-width: 720px; margin: 20px 0 0; color: var(--muted); font-size: 1.08rem; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 10px 17px;
  border-radius: 14px;
  color: #00122d;
  background: linear-gradient(135deg, var(--accent), #4cebf7);
  font-weight: 800;
  text-decoration: none;
}
.button.secondary { color: var(--text); background: transparent; border: 1px solid var(--line); }

.content { display: grid; gap: 16px; margin-top: 20px; }
.card { padding: clamp(22px, 4vw, 36px); border-radius: 22px; }
.card h2 { margin: 0 0 12px; font-size: 1.35rem; }
.card h3 { margin: 24px 0 8px; font-size: 1rem; }
.card p, .card li { color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.card ul, .card ol { padding-left: 22px; }

.meta { margin-top: 20px; color: var(--muted); font-size: .9rem; }
.notice { border-left: 3px solid var(--accent); padding: 12px 16px; background: rgba(32, 213, 233, .07); border-radius: 0 12px 12px 0; }
footer { margin-top: 28px; color: var(--muted); font-size: .88rem; text-align: center; }

@media (max-width: 640px) {
  .shell { width: min(100% - 22px, 920px); padding-top: 18px; }
  .topbar { align-items: flex-start; flex-direction: column; margin-bottom: 20px; }
  .nav { justify-content: flex-start; }
  .hero { border-radius: 22px; }
}