/* Light is the default. Dark applies via an explicit choice or, when none is saved, the system setting. */
:root {
  color-scheme: light;
  --bg: #f7f5ef; --fg: #1d2430; --muted: #5b6474; --accent: #1f7a5c; --gold: #c8962e;
  --card: #ffffff; --line: #e2dfd5; --side: #ffffff; --danger-bg: #fbe9e9; --danger-fg: #a12a2a;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f141c; --fg: #e6eaf2; --muted: #9aa4b5; --accent: #3cc093; --gold: #e0b04e;
  --card: #171e29; --line: #2a3443; --side: #131a24; --danger-bg: #3a1d1d; --danger-fg: #f2a6a6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0f141c; --fg: #e6eaf2; --muted: #9aa4b5; --accent: #3cc093; --gold: #e0b04e;
    --card: #171e29; --line: #2a3443; --side: #131a24; --danger-bg: #3a1d1d; --danger-fg: #f2a6a6;
  }
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--fg); line-height: 1.5; }
a { color: var(--accent); }
h1 { margin: 0; font-size: 1.5rem; }
h2 { font-size: 1.15rem; margin: 0 0 0.6rem; }
h3 { font-size: 1rem; margin: 1rem 0 0.4rem; color: var(--muted); }
section { margin-bottom: 1.75rem; scroll-margin-top: 1rem; }
.subtitle, .meta, .meaning { color: var(--muted); margin: 0; font-size: 0.9rem; }
.meta { font-size: 0.85rem; }

.layout { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--side); border-right: 1px solid var(--line);
  padding: 1rem; display: flex; flex-direction: column; gap: 1rem;
}
.brand { text-align: center; }
.logo-wrap { background: #ffffff; border-radius: 12px; padding: 0.5rem; }
.logo { display: block; width: 100%; height: auto; }
.beta { margin: 0.5rem 0 0; font-weight: 600; color: var(--accent); font-size: 0.9rem; letter-spacing: 0.02em; }
.sidebar nav { display: flex; flex-direction: column; gap: 0.25rem; }
.sidebar nav a { display: block; padding: 0.5rem 0.75rem; border-radius: 8px; color: var(--fg); text-decoration: none; }
.sidebar nav a:hover, .sidebar nav a:focus-visible { background: var(--card); }

.content { min-width: 0; }
.topbar { display: flex; gap: 0.75rem; align-items: center; padding: 1rem 1rem 0; max-width: 960px; margin: 0 auto; }
main { max-width: 960px; margin: 0 auto; padding: 1rem; }
.footer { max-width: 960px; margin: 0 auto; padding: 0 1rem 2rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.35rem; cursor: pointer; text-decoration: none;
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  border-radius: 10px; padding: 0.45rem 0.8rem; font: inherit; font-size: 0.92rem;
}
.btn:hover { border-color: var(--accent); }
.menu-toggle { display: none; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.5rem 0; }
#theme-toggle { width: 100%; justify-content: center; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.75rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.75rem; }
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value { font-size: 1.25rem; font-weight: 600; }
.weekly { margin-top: 0.75rem; grid-column: 1 / -1; }
.progress { height: 10px; background: var(--line); border-radius: 999px; overflow: hidden; margin-top: 0.5rem; }
.progress > span { display: block; height: 100%; background: var(--accent); }

.badges { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 0.75rem; }
.badge { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.75rem; opacity: 0.6; }
.badge.earned { opacity: 1; border-color: var(--gold); }
.badge .title { font-weight: 600; }
.badge .meta { font-size: 0.85rem; color: var(--muted); }

#letters { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 0.75rem; }
#letters button { border: 1px solid var(--line); background: var(--card); color: var(--fg); border-radius: 999px; padding: 0.25rem 0.6rem; cursor: pointer; font: inherit; }
#letters button[aria-pressed="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }

.names { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.name { display: grid; grid-template-columns: auto 1fr; gap: 0.75rem; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.75rem; }
.name.done { border-color: var(--accent); }
.check { width: 2rem; height: 2rem; border-radius: 8px; border: 2px solid var(--accent); background: var(--card); color: var(--fg); cursor: pointer; font-size: 1rem; }
.check[aria-pressed="true"] { background: var(--accent); color: #fff; }
.name .title { font-weight: 600; }
.name .arabic { font-size: 1.2rem; direction: rtl; }
.name .task { margin-top: 0.25rem; }

.sources { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.sources li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.6rem 0.75rem; }
.notice { font-size: 0.88rem; color: var(--muted); background: var(--card); border: 1px dashed var(--line); border-radius: 10px; padding: 0.6rem 0.75rem; }
.error { color: var(--danger-fg); background: var(--danger-bg); border-radius: 8px; padding: 0.5rem 0.75rem; }

:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; width: 260px; height: auto; z-index: 20;
    transform: translateX(-100%); transition: transform 0.2s ease;
  }
  .sidebar.open { transform: none; box-shadow: 0 0 24px rgba(0, 0, 0, 0.3); }
  .menu-toggle { display: inline-flex; }
}