:root {
  color-scheme: light dark;
  --bg: #f6f6fb;
  --surface: #ffffff;
  --text: #15151f;
  --text-mid: #4a4a5e;
  --text-low: #6e6e85;
  --line: #e3e3ee;
  --accent: #6a48f0;
  --accent-2: #e8357f;
  --chip: #efeafe;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b12;
    --surface: #14141e;
    --text: #f5f5fa;
    --text-mid: #b4b4c8;
    --text-low: #8a8aa2;
    --line: #2e2e42;
    --accent: #9a82ff;
    --accent-2: #ff6aae;
    --chip: #1c1c29;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Sinhala", sans-serif;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-2); }

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }

header.top { padding: 2.75rem 0 1.25rem; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-low);
}

.brand::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

h1 { margin: 0; font-size: clamp(1.75rem, 5vw, 2.4rem); line-height: 1.15; letter-spacing: -0.02em; }

.meta { margin: 0.6rem 0 0; color: var(--text-mid); font-size: 0.95rem; }

/* Google's badge PNG carries its own transparent padding. */
.get-app { margin: 0.9rem 0 0 -10px; }
.get-app a { display: inline-block; border-radius: 10px; }
.get-app img { display: block; width: 166px; height: 64px; }

footer p { margin: 0 0 0.4rem; color: var(--text-low); }

nav.tabs {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  gap: 0.25rem;
  margin: 0 -1rem;
  padding: 0.5rem 1rem;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

nav.tabs a {
  position: relative;
  padding: 0.65rem 0.9rem;
  border-radius: 0.6rem;
  color: var(--text-mid);
  font-weight: 600;
  text-decoration: none;
}

nav.tabs a:hover { color: var(--text); background: var(--chip); }

nav.tabs a[aria-selected="true"] { color: var(--text); }

nav.tabs a[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

nav.tabs a:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

main { padding: 1.5rem 0 3rem; }

section.panel {
  padding: 1.5rem 1.25rem 0.5rem;
  margin-bottom: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
}

section.panel[hidden] { display: none; }

h2 { margin: 0 0 0.75rem; font-size: 1.5rem; letter-spacing: -0.01em; }

h3 { margin: 1.75rem 0 0.4rem; font-size: 1.08rem; }

p, ul { margin: 0 0 0.9rem; color: var(--text-mid); }

li { margin: 0.25rem 0; }

strong { color: var(--text); }

.summary {
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
  border-radius: 0.75rem;
  background: var(--chip);
  color: var(--text);
}

.summary p, .summary ul { color: var(--text); }

.summary > :last-child { margin-bottom: 0; }

footer { padding: 0 0 3rem; color: var(--text-low); font-size: 0.9rem; }

ul.apps { list-style: none; padding: 0; }

ul.apps a {
  display: block;
  padding: 1rem 1.1rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

ul.apps a span { display: block; color: var(--text-mid); font-weight: 400; font-size: 0.95rem; }

@media print {
  nav.tabs { display: none; }
  section.panel, section.panel[hidden] { display: block; border: 0; padding: 0; }
}