/* RB Academy — Apple-style + accent кофейного цвета. Соответствует фирменному стеку RB (см. finance_dashboard, order_dashboard). */

:root {
  --bg: #fbfbfd;
  --paper: #ffffff;
  --paper-2: #f5f5f7;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --muted: #86868b;
  --line: rgba(0,0,0,0.08);
  --line-soft: rgba(0,0,0,0.04);

  --accent: #b8521a;          /* roasted coffee */
  --accent-soft: #fdf2e8;
  --accent-2: #0071e3;        /* системный синий RB для нейтральных кнопок */
  --pos: #28cd41;
  --neg: #ff3b30;
  --warn: #ff9f0a;

  /* акценты курсов */
  --c1: #c8810a;   /* Любитель — янтарь */
  --c2: #b65b1c;   /* Бариста — сиенна */
  --c3: #8a3324;   /* Профи — бордо */
  --c4: #5b4c3a;   /* Владелец — кофейно-серый */
  --c5: #2f6c4a;   /* Чай — изумруд */

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03), 0 1px 3px rgba(0,0,0,0.05);
  --shadow:    0 1px 0 rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);

  --radius:    16px;
  --radius-sm: 10px;
  --radius-xs: 8px;
}

* { box-sizing: border-box; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-feature-settings: "kern", "liga", "calt", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.011em;
}

h1, h2, h3, h4 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--ink);
  line-height: 1.1;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

.mono {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, monospace;
  font-feature-settings: "tnum";
}

/* ────────── контейнеры ────────── */

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  border-color: rgba(0,0,0,0.12);
}

.card-stripe { position: relative; overflow: hidden; }
.card-stripe::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--rb-card-accent, var(--accent));
}

.accent-amber   { --rb-card-accent: var(--c1); }
.accent-orange  { --rb-card-accent: var(--c2); }
.accent-red     { --rb-card-accent: var(--c3); }
.accent-stone   { --rb-card-accent: var(--c4); }
.accent-emerald { --rb-card-accent: var(--c5); }

/* ────────── pills / badges ────────── */

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: 999px;
  background: var(--paper-2); color: var(--ink-2);
  font-size: 12px; font-weight: 500; letter-spacing: 0;
  border: 1px solid var(--line-soft);
}
.pill-amber   { background: rgba(200,129,10,.10);  color: #6a4500; border-color: rgba(200,129,10,.18); }
.pill-orange  { background: rgba(182,91,28,.10);   color: #6c310e; border-color: rgba(182,91,28,.18); }
.pill-red     { background: rgba(138,51,36,.10);   color: #4a1c14; border-color: rgba(138,51,36,.18); }
.pill-stone   { background: rgba(91,76,58,.10);    color: #3a3024; border-color: rgba(91,76,58,.18); }
.pill-emerald { background: rgba(47,108,74,.10);   color: #1c4a32; border-color: rgba(47,108,74,.18); }

/* ────────── buttons ────────── */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 12px;
  background: var(--ink); color: #fff;
  font-weight: 500; font-size: 15px;
  border: 1px solid var(--ink);
  transition: background .15s ease, border-color .15s ease, transform .1s ease;
  cursor: pointer;
}
.btn:hover { background: #000; transform: translateY(-1px); color: #fff; }

.btn-accent {
  background: var(--accent); border-color: var(--accent);
}
.btn-accent:hover { background: #963f0c; border-color: #963f0c; color:#fff; }

.btn-ghost {
  background: var(--paper); color: var(--ink); border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { background: var(--paper-2); color: var(--ink); border-color: rgba(0,0,0,0.12); }

/* ────────── progress ────────── */

.progress-track { height: 6px; background: var(--line-soft); border-radius: 999px; overflow: hidden; }
.progress-fill  { height: 100%; background: var(--accent); transition: width .3s ease; border-radius: 999px; }

/* ────────── lesson typography ────────── */

.lesson-prose {
  font-size: 18px; line-height: 1.7; color: var(--ink-2);
  letter-spacing: -0.005em;
}
.lesson-prose h2 { font-size: 28px; margin: 36px 0 14px; color: var(--ink); }
.lesson-prose h3 { font-size: 22px; margin: 28px 0 10px; color: var(--ink); }
.lesson-prose p { margin: 14px 0; }
.lesson-prose strong { color: var(--ink); font-weight: 600; }
.lesson-prose ul, .lesson-prose ol { margin: 12px 0 12px 24px; }
.lesson-prose li { margin: 6px 0; }
.lesson-prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 10px 18px;
  color: var(--ink-2);
  background: var(--accent-soft);
  border-radius: 0 12px 12px 0;
  margin: 22px 0;
  font-style: normal;
}
.lesson-prose code {
  background: var(--paper-2); padding: 2px 7px; border-radius: var(--radius-xs); font-size: 0.9em;
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
}
.lesson-prose img {
  max-width: 100%; border-radius: var(--radius); margin: 22px 0;
  box-shadow: var(--shadow);
}
.lesson-prose a { color: var(--accent); border-bottom: 1px solid rgba(184,82,26,0.3); }
.lesson-prose a:hover { border-bottom-color: var(--accent); }

/* ────────── illustration block ────────── */

.illust {
  margin: 26px 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
}
.illust-img {
  width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; background: var(--paper-2);
}
.illust-placeholder {
  width: 100%; aspect-ratio: 16/9;
  background: linear-gradient(135deg, #f5f5f7 0%, #ece7df 100%);
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 8px;
  color: var(--muted); font-size: 13px;
}
.illust-placeholder .ico { font-size: 28px; opacity: .55; }
.illust-meta {
  padding: 14px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px; color: var(--muted);
}
.illust-caption { color: var(--ink-2); font-weight: 500; margin-bottom: 4px; }
.illust-prompt {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--paper-2);
  border-radius: var(--radius-xs);
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 12px; color: var(--ink-2);
  line-height: 1.45;
  white-space: pre-wrap;
  border: 1px dashed var(--line);
}

/* ────────── callouts / dots ────────── */

.callout {
  background: var(--accent-soft);
  border: 1px solid rgba(184,82,26,0.18);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 22px 0;
}
.callout-title { font-weight: 600; margin-bottom: 6px; color: var(--ink); }

.dot { width: 7px; height: 7px; border-radius: 999px; background: var(--line); display: inline-block; }
.dot.done { background: var(--accent); }

/* ────────── hairlines ────────── */

.hairline { border-color: var(--line); }
.hairline-soft { border-color: var(--line-soft); }

/* ────────── header ────────── */

.app-header {
  background: rgba(251,251,253,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}