/* ═══════════════════════════════════════════
   Telegram Mini App · TaskFlow Lesson 1
   Тема: адаптивная, наследует переменные Telegram
   ═══════════════════════════════════════════ */

:root {
  /* Fallback для браузера (вне Telegram) */
  --bg: var(--tg-theme-bg-color, #1c1c1e);
  --bg-secondary: var(--tg-theme-secondary-bg-color, #2c2c2e);
  --text: var(--tg-theme-text-color, #ffffff);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #5ac8fa);
  --button: var(--tg-theme-button-color, #5ac8fa);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --accent: #5ac8fa;
  --success: #34c759;
  --danger: #ff3b30;
  --warning: #ff9f0a;
  --border: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
  --radius: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  padding-bottom: 32px;
}

/* ═══════ Шапка с прогресс-баром ═══════ */

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.lesson-badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent);
  background: rgba(90, 200, 250, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

.progress-pill {
  font-size: 12px;
  font-weight: 600;
  color: var(--hint);
  background: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: 999px;
  transition: all 0.3s ease;
}

.progress-pill.complete {
  color: var(--success);
  background: rgba(52, 199, 89, 0.12);
}

.app-title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 12px;
  letter-spacing: -0.2px;
}

.progress-bar {
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 999px;
  transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ═══════ Контейнер и карточки ═══════ */

.container {
  padding: 14px 14px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  transition: border-color 0.3s ease, transform 0.2s ease;
}

.card.complete {
  border-color: var(--success);
}

.goal-card {
  background: linear-gradient(135deg, rgba(90, 200, 250, 0.10), rgba(90, 200, 250, 0.02));
  border-color: rgba(90, 200, 250, 0.20);
}

.interview-card {
  background: linear-gradient(135deg, rgba(255, 159, 10, 0.10), rgba(255, 159, 10, 0.02));
  border-color: rgba(255, 159, 10, 0.20);
}

.questions-card {
  background: linear-gradient(135deg, rgba(175, 82, 222, 0.10), rgba(175, 82, 222, 0.02));
  border-color: rgba(175, 82, 222, 0.20);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.card-header h2 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  flex: 1;
  letter-spacing: -0.1px;
}

.emoji {
  font-size: 22px;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.check-btn {
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--hint);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.check-btn:hover { transform: scale(1.08); }
.check-btn:active { transform: scale(0.94); }
.check-btn.done {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.hint-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(90, 200, 250, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ═══════ Типографика внутри карточек ═══════ */

.card p { margin: 8px 0; }
.card p.muted { color: var(--hint); font-size: 14px; }
.card p.success { color: var(--success); font-weight: 600; }
.card p.small { font-size: 12px; }

.card ul, .card ol { padding-left: 22px; margin: 8px 0; }
.card li { margin: 4px 0; }

.card code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  background: rgba(127, 127, 127, 0.18);
  padding: 1px 6px;
  border-radius: 5px;
  word-break: break-word;
}

.card pre {
  background: #1a1a1c;
  color: #e6e6e6;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.5;
  margin: 10px 0;
  border: 1px solid rgba(255,255,255,0.04);
}

.card pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.card a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px dashed var(--link);
}

blockquote.analogy {
  margin: 12px 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: rgba(90, 200, 250, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  color: var(--text);
}

blockquote.analogy b { color: var(--accent); }

.interview-hint {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(255, 159, 10, 0.10);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
}

.hint-icon { font-size: 16px; line-height: 1; }

/* ═══════ Раскрывающиеся топики теории ═══════ */

.topic {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin: 10px 0;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.topic[open] { border-color: var(--accent); }

.topic summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  cursor: pointer;
  user-select: none;
  background: rgba(255,255,255,0.02);
  transition: background 0.2s ease;
}

.topic summary::-webkit-details-marker { display: none; }
.topic summary:hover { background: rgba(255,255,255,0.05); }
.topic summary:active { background: rgba(255,255,255,0.08); }

.topic-num {
  width: 24px;
  height: 24px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.topic summary > span:nth-child(2) {
  flex: 1;
  font-weight: 600;
  font-size: 14.5px;
}

.chevron {
  color: var(--hint);
  font-size: 12px;
  transition: transform 0.2s ease;
}
.topic[open] .chevron { transform: rotate(90deg); }

.topic-body { padding: 4px 14px 14px; }

/* ═══════ @SpringBootApplication — 3 в одном ═══════ */

.triple-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0;
}

.triple-item {
  background: rgba(90, 200, 250, 0.08);
  border: 1px solid rgba(90, 200, 250, 0.20);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.triple-tag {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 4px;
}

.triple-item p {
  margin: 0;
  font-size: 13.5px;
  color: var(--text);
}

/* ═══════ Стартеры ═══════ */

.starter-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
}

.starter-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  background: rgba(52, 199, 89, 0.07);
  border-left: 3px solid var(--success);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.starter-name {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--success);
}

.starter-deps { font-size: 13px; color: var(--text); }

/* ═══════ Таблица HTTP-методов ═══════ */

.methods-table {
  margin: 12px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: 13px;
}

.methods-table .row {
  display: grid;
  grid-template-columns: 80px 1fr 50px 60px;
  align-items: center;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}

.methods-table .row:last-child { border-bottom: none; }
.methods-table .row.head {
  background: rgba(255,255,255,0.04);
  font-weight: 700;
  font-size: 12px;
  color: var(--hint);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.methods-table .row > div:nth-child(3),
.methods-table .row > div:nth-child(4) { text-align: center; font-size: 14px; }

.methods-table .m-get,
.methods-table .m-post,
.methods-table .m-put,
.methods-table .m-patch,
.methods-table .m-del {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  text-align: center;
  letter-spacing: 0.5px;
}

.m-get    { background: rgba(52, 199, 89, 0.20);  color: #4cd964; }
.m-post   { background: rgba(255, 159, 10, 0.20); color: #ffb340; }
.m-put    { background: rgba(90, 200, 250, 0.20); color: #5ac8fa; }
.m-patch  { background: rgba(175, 82, 222, 0.20); color: #af52de; }
.m-del    { background: rgba(255, 59, 48, 0.20);  color: #ff6259; }

/* ═══════ Практика — шаги ═══════ */

.steps {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  counter-reset: step;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
  opacity: 0.3;
}

.step {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  position: relative;
}

.step-num {
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  z-index: 1;
  box-shadow: 0 2px 8px rgba(90, 200, 250, 0.4);
}

.step-body { flex: 1; min-width: 0; }
.step-title { font-weight: 700; font-size: 15px; margin-bottom: 4px; }

.kv {
  list-style: none;
  padding: 0;
  margin: 8px 0;
}

.kv li {
  display: flex;
  gap: 10px;
  padding: 4px 0;
  font-size: 13.5px;
  align-items: baseline;
}

.kv li span {
  color: var(--hint);
  min-width: 100px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.kv li b { font-weight: 600; }

/* ═══════ Карточки вопросов ═══════ */

.q-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin: 10px 0;
  overflow: hidden;
  transition: all 0.2s ease;
}

.q-item.opened {
  border-color: var(--accent);
  background: rgba(90, 200, 250, 0.04);
}

.q-item.chosen {
  border-color: var(--success);
  background: rgba(52, 199, 89, 0.05);
}

.q-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.02);
}

.q-num {
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, #af52de, #5ac8fa);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.q-text { flex: 1; font-size: 14px; font-weight: 600; line-height: 1.35; }

.q-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.q-toggle:hover { background: var(--bg-secondary); }
.q-toggle:active { transform: scale(0.94); }

.q-body {
  display: none;
  padding: 0 14px 12px;
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  margin-top: 0;
  padding-top: 10px;
}

.q-item.opened .q-body { display: block; }

.choose-btn {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.choose-btn:hover { background: rgba(90, 200, 250, 0.10); }
.choose-btn:active { transform: scale(0.98); }

.choose-btn.chosen {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

/* ═══════ Карточка вопросов — кнопка выбора ═══════ */

.q-item .q-body { padding-bottom: 12px; }

/* ═══════ Финальная карточка ═══════ */

.finish-card {
  background: linear-gradient(135deg, rgba(52, 199, 89, 0.10), rgba(90, 200, 250, 0.10));
  border-color: rgba(52, 199, 89, 0.25);
  text-align: center;
  padding: 22px 18px;
}

.finish-card h2 { margin: 0 0 6px; font-size: 19px; }
.finish-card p { margin: 6px 0 14px; }

.big-btn {
  display: block;
  width: 100%;
  padding: 14px 18px;
  background: var(--button);
  color: var(--button-text);
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(90, 200, 250, 0.30);
  margin-top: 6px;
}

.big-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(90, 200, 250, 0.40);
}

.big-btn:active:not(:disabled) { transform: translateY(0); }

.big-btn:disabled {
  background: var(--bg-secondary);
  color: var(--hint);
  cursor: not-allowed;
  box-shadow: none;
}

/* ═══════ Тосты ═══════ */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-secondary);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0,0,0,0.30);
  border: 1px solid var(--border);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  z-index: 100;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ═══════ Адаптив ═══════ */

@media (min-width: 768px) {
  body { font-size: 16px; }
  .container { max-width: 720px; margin: 0 auto; padding: 18px 18px 0; }
  .app-header { padding: 18px 24px 14px; }
  .app-title { font-size: 22px; }
  .card { padding: 18px; }
}

@media (min-width: 1024px) {
  .container { max-width: 820px; }
}

/* Снижение движения для пользователей с настройкой */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}