:root {
  --bg: #f5f5f7; --surface: #ffffff; --text: #1c1c1e; --muted: #6b6b73; --line: #e3e3e8;
  --accent: #e07b00; --accent-text: #ffffff; --danger: #d92d20; --callout: #fff4e5; --ok: #e8f7ee;
  --radius: 18px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e10; --surface: #1a1a1d; --text: #f2f2f5; --muted: #9a9aa5; --line: #2b2b31;
    --accent: #ff9f0a; --accent-text: #1c1c1e; --danger: #ff6b5e; --callout: #2a2113; --ok: #14291d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.7rem; line-height: 1.2; margin: .4rem 0 .6rem; overflow-wrap: anywhere; }
h2 { font-size: 1.1rem; margin: 1.6rem 0 .5rem; }
h3 { margin: 1rem 0 .3rem; font-size: 1rem; }
.muted { color: var(--muted); }
.lead { font-size: 1.1rem; }
.error { color: var(--danger); }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px max(16px, env(safe-area-inset-left)); border-bottom: 1px solid var(--line);
  background: var(--surface); position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand-mark { width: 14px; height: 14px; border-radius: 4px; background: var(--accent); display: inline-block; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--muted); padding: 6px 12px; border-radius: 999px; }
.nav a.active, .nav a:hover { background: var(--bg); color: var(--text); text-decoration: none; }

.container { max-width: 1080px; margin: 0 auto; padding: 20px 16px 40px; }
.container.narrow { max-width: 760px; }
.grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; align-items: start; }
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } }
.hero { margin-bottom: 8px; }
.hero-title { display: none; }
.eyebrow { color: var(--muted); margin: 0; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 0 0 16px; }
.lesson h1 { font-size: 1.6rem; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; font-size: .9rem; }
.chip { background: var(--accent); color: var(--accent-text); padding: 2px 10px; border-radius: 999px; font-weight: 600; font-size: .85rem; }
.chip.small { font-size: .75rem; }
.topic-english { background: #0a84ff; color: #fff; }
.topic-finance { background: #30d158; color: #06260f; }
.topic-psychology { background: #bf5af2; color: #fff; }
.topic-communication { background: #ff453a; color: #fff; }
.badge { padding: 2px 8px; border-radius: 8px; font-size: .75rem; font-weight: 700; }
.badge-repeat { background: var(--callout); color: var(--accent); border: 1px solid var(--accent); }
.prose { white-space: pre-line; overflow-wrap: anywhere; }
.callout { background: var(--callout); border-radius: 12px; padding: 14px 16px; }
.callout-warn { background: var(--callout); }
.question { font-weight: 600; }
.answer { background: var(--bg); border-radius: 12px; padding: 12px 16px; }
.answer summary { cursor: pointer; font-weight: 600; color: var(--accent); }
.rating { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 12px; }
.note { font-size: .9rem; color: var(--muted); border-left: 3px solid var(--accent); padding-left: 10px; }
.source { font-size: .9rem; color: var(--muted); overflow-wrap: anywhere; }

.btn {
  display: inline-block; font: inherit; border: 1px solid var(--line); background: var(--surface); color: var(--text);
  padding: 10px 16px; border-radius: 12px; cursor: pointer; min-height: 44px;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.small { padding: 6px 12px; min-height: 36px; }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }
.btn.danger { color: var(--danger); border-color: var(--danger); }

.tabs { display: flex; gap: 6px; margin: 10px 0; flex-wrap: wrap; }
.tab { font: inherit; border: 1px solid var(--line); background: var(--bg); color: var(--muted); padding: 6px 12px; border-radius: 999px; cursor: pointer; }
.tab.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.phone { width: 100%; max-width: 260px; margin: 12px auto; border: 6px solid #2b2b31; border-radius: 34px; overflow: hidden; background: #000; }
.phone.small { max-width: 220px; }
.phone img { display: block; width: 100%; height: auto; }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 18px; }
.chip-link { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface); }
.chip-link.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.list { list-style: none; padding: 0; margin: 0; }
.item { padding: 14px 16px; margin-bottom: 10px; }
.item a { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; color: var(--text); }
.pager { display: flex; justify-content: space-between; margin-top: 16px; }

.form label { display: block; margin: 12px 0; font-weight: 600; }
.form input:not([type=checkbox]), .form select, .copy-row input, label input[readonly] {
  display: block; width: 100%; font: inherit; padding: 10px 12px; margin-top: 4px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--text); min-height: 44px;
}
.check { display: flex !important; gap: 10px; align-items: center; font-weight: 500 !important; }
.check input { width: 20px; height: 20px; }
.topic-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.topic-row .num { width: 100px !important; margin: 0; }
.schedule { width: 100%; border-collapse: collapse; }
.schedule td, .schedule th { padding: 6px 4px; text-align: left; }
.copy-row { display: flex; gap: 8px; align-items: center; }
.copy-row input { flex: 1; font-size: .8rem; }
.flash { background: var(--ok); border: 1px solid var(--line); padding: 12px 16px; border-radius: 12px; margin-bottom: 16px; }
.steps { padding-left: 1.2rem; }
.steps li { margin-bottom: 12px; }
.steps h3 { margin-bottom: 2px; }
.footer { text-align: center; color: var(--muted); padding: 24px 16px; font-size: .85rem; }