/* ТрейдКальк — общие стили */
:root {
  --bg: #0b0e14;
  --bg-2: #11151f;
  --card: #161b28;
  --card-2: #1c2333;
  --border: #262f45;
  --text: #e8ecf4;
  --muted: #9aa4bd;
  --accent: #4f8cff;
  --accent-2: #3a6fd8;
  --green: #2ebd85;
  --red: #f6465d;
  --gold: #f0b90b;
  --radius: 14px;
  --maxw: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

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

/* ---------- Шапка ---------- */
header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}

.logo {
  font-weight: 800;
  font-size: 19px;
  color: var(--text);
  white-space: nowrap;
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 7px 12px;
  border-radius: 8px;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.nav-links a.active { color: var(--text); background: var(--card-2); }

/* ---------- Заголовки страниц ---------- */
.page-head { padding: 44px 0 10px; }
.page-head h1 { font-size: clamp(26px, 4.5vw, 38px); line-height: 1.2; letter-spacing: -0.5px; }
.page-head .sub { color: var(--muted); margin-top: 12px; max-width: 720px; font-size: 17px; }

/* ---------- Карточка калькулятора ---------- */
.calc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 28px 0;
}
@media (max-width: 760px) { .calc { grid-template-columns: 1fr; } }

.calc-inputs { padding: 26px; border-right: 1px solid var(--border); }
@media (max-width: 760px) { .calc-inputs { border-right: none; border-bottom: 1px solid var(--border); } }

.calc-results { padding: 26px; background: var(--card-2); display: flex; flex-direction: column; gap: 14px; justify-content: center; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }

.field input, .field select {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.field input:focus, .field select:focus { border-color: var(--accent); }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 5px; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } }

/* Переключатель лонг/шорт */
.toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.toggle button {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.toggle button.on-long { background: rgba(46, 189, 133, 0.15); border-color: var(--green); color: var(--green); }
.toggle button.on-short { background: rgba(246, 70, 93, 0.15); border-color: var(--red); color: var(--red); }

/* Результаты */
.res { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; border-bottom: 1px dashed var(--border); padding-bottom: 10px; }
.res:last-child { border-bottom: none; padding-bottom: 0; }
.res .k { color: var(--muted); font-size: 14px; }
.res .v { font-weight: 700; font-size: 17px; text-align: right; white-space: nowrap; }
.res .v.big { font-size: 26px; }
.res .v.green { color: var(--green); }
.res .v.red { color: var(--red); }
.res .v.gold { color: var(--gold); }

/* ---------- Текстовый блок / статья ---------- */
.article { max-width: 760px; margin: 40px auto 0; }
.article h2 { font-size: 24px; margin: 34px 0 12px; letter-spacing: -0.3px; }
.article h3 { font-size: 19px; margin: 24px 0 10px; }
.article p { color: #c6cddc; margin-bottom: 14px; }
.article ul, .article ol { color: #c6cddc; margin: 0 0 14px 22px; }
.article li { margin-bottom: 7px; }
.article .formula {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 14px 18px;
  font-family: "SF Mono", ui-monospace, Consolas, monospace;
  font-size: 14.5px;
  margin: 16px 0;
  overflow-x: auto;
  white-space: nowrap;
}

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 36px auto 0; }
.faq h2 { font-size: 24px; margin-bottom: 16px; }
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  overflow: hidden;
}
.faq summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 20px; font-weight: 400; flex-shrink: 0; }
.faq details[open] summary::after { content: "–"; }
.faq .faq-body { padding: 0 20px 16px; color: #c6cddc; font-size: 15px; }

/* ---------- CTA блок бирж ---------- */
.cta {
  max-width: 760px;
  margin: 44px auto 0;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.09), rgba(46, 189, 133, 0.07));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.cta h2 { font-size: 22px; margin-bottom: 6px; }
.cta > p { color: var(--muted); font-size: 15px; margin-bottom: 18px; }

.cta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 700px) { .cta-grid { grid-template-columns: 1fr; } }

.cta-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cta-card .name { font-weight: 800; font-size: 17px; }
.cta-card .desc { color: var(--muted); font-size: 13.5px; flex: 1; }
.cta-card a.btn {
  display: block;
  text-align: center;
  padding: 10px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 14.5px;
  transition: background 0.15s;
}
.cta-card a.btn:hover { background: var(--accent-2); text-decoration: none; }

.ad-mark { font-size: 11px; color: var(--muted); margin-top: 12px; }

/* ---------- Сетка инструментов (главная) ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 32px 0;
}
@media (max-width: 700px) { .tools-grid { grid-template-columns: 1fr; } }

.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.tool-card .icon { font-size: 28px; margin-bottom: 10px; }
.tool-card h3 { font-size: 18px; margin-bottom: 6px; }
.tool-card p { color: var(--muted); font-size: 14px; }

/* ---------- Таблицы ---------- */
.table-wrap { overflow-x: auto; margin: 20px 0; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 520px; }
th { background: var(--card-2); text-align: left; padding: 12px 14px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; }
td { padding: 11px 14px; border-top: 1px solid var(--border); }
tbody tr:hover { background: rgba(79, 140, 255, 0.04); }

/* ---------- График ---------- */
.chart-wrap { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin: 24px 0; }
.chart-wrap canvas { width: 100%; height: 280px; display: block; }

/* ---------- Разное ---------- */
.warn {
  background: rgba(240, 185, 11, 0.08);
  border: 1px solid rgba(240, 185, 11, 0.35);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  color: #e5c766;
  margin: 16px 0;
}

.breadcrumbs { font-size: 13px; color: var(--muted); padding-top: 20px; }
.breadcrumbs a { color: var(--muted); }

footer {
  margin-top: 70px;
  border-top: 1px solid var(--border);
  padding: 32px 0 40px;
  background: var(--bg-2);
}
footer .container { display: flex; flex-direction: column; gap: 14px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 14px; }
.foot-nav a { color: var(--muted); }
.disclaimer { font-size: 12.5px; color: #6b7590; max-width: 860px; line-height: 1.6; }