/* Резервная энергия: общий стиль. Без внешних шрифтов и библиотек, чтобы страницы грузились быстро. */
:root {
  --sun: #ff9f1c;
  --sun-soft: #fff1d6;
  --leaf: #1fa971;
  --leaf-soft: #dcf5ea;
  --sky: #2b7de9;
  --sky-soft: #dfeafd;
  --violet: #7b5cf0;
  --violet-soft: #ebe6fd;
  --ink: #17233b;
  --muted: #55617a;
  --line: #e3e8f2;
  --bg: #f6f8fc;
  --card: #ffffff;
  --radius: 18px;
  --shadow: 0 6px 22px rgba(23, 35, 59, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--sky); }
a:hover { color: var(--violet); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Шапка */
header.site {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
}
.brand svg { width: 34px; height: 34px; }
nav.main { display: flex; flex-wrap: wrap; gap: 4px; }
nav.main a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
nav.main a:hover { background: var(--sky-soft); }
nav.main a[aria-current="page"] { background: var(--sun); color: #3b2500; }

/* Главный экран */
.hero {
  background: linear-gradient(135deg, #ffb347 0%, #ff7e5f 38%, #7b5cf0 100%);
  color: #fff;
  padding: 64px 0 72px;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.15; margin: 0 0 16px; }
.hero p { font-size: 1.15rem; max-width: 640px; margin: 0 0 28px; opacity: 0.96; }
.hero .stats { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero .stat {
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 14px;
  padding: 12px 18px;
  min-width: 150px;
}
.hero .stat b { display: block; font-size: 1.5rem; }
.hero .stat span { font-size: 0.9rem; opacity: 0.95; }

.btn {
  display: inline-block;
  background: #fff;
  color: #3b2500;
  font-weight: 800;
  padding: 14px 26px;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}
.btn:hover { color: #3b2500; transform: translateY(-1px); }

/* Страничный заголовок (внутренние страницы) */
.page-head { padding: 44px 0 36px; color: #fff; }
.page-head h1 { margin: 0 0 8px; font-size: clamp(1.7rem, 4vw, 2.5rem); }
.page-head p { margin: 0; max-width: 680px; opacity: 0.96; font-size: 1.08rem; }
.bg-sun { background: linear-gradient(135deg, #ffb347, #ff7e5f); }
.bg-leaf { background: linear-gradient(135deg, #1fa971, #2b7de9); }
.bg-sky { background: linear-gradient(135deg, #2b7de9, #7b5cf0); }
.bg-violet { background: linear-gradient(135deg, #7b5cf0, #ff7e5f); }

main { padding: 36px 0 56px; }
main h2 { font-size: 1.6rem; margin: 40px 0 12px; }
main h2:first-child { margin-top: 0; }
main h3 { font-size: 1.15rem; margin: 22px 0 6px; }
main p { margin: 0 0 14px; }
main ul { padding-left: 22px; }
main li { margin-bottom: 6px; }

/* Карточки */
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.card .icon svg { width: 30px; height: 30px; }
.card.sun .icon { background: var(--sun-soft); }
.card.leaf .icon { background: var(--leaf-soft); }
.card.sky .icon { background: var(--sky-soft); }
.card.violet .icon { background: var(--violet-soft); }
.card a.more { font-weight: 700; text-decoration: none; }

.note {
  border-left: 5px solid var(--sun);
  background: var(--sun-soft);
  border-radius: 12px;
  padding: 14px 18px;
  margin: 18px 0;
}
.note.good { border-color: var(--leaf); background: var(--leaf-soft); }
.note.info { border-color: var(--sky); background: var(--sky-soft); }

/* Таблицы */
.table-scroll { overflow-x: auto; }
table.compare {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 14px 0 22px;
}
table.compare th, table.compare td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.compare th { background: var(--sky-soft); font-size: 0.92rem; }
table.compare tr:last-child td { border-bottom: 0; }

/* Калькулятор */
.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 24px;
  align-items: start;
}
@media (max-width: 820px) {
  .calc-layout { grid-template-columns: 1fr; }
}
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.panel h2 { margin: 0 0 16px !important; font-size: 1.25rem; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; }
.field input[type="number"], .field select {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
}
.field input:focus, .field select:focus, .load input[type="number"]:focus {
  outline: 3px solid var(--sky-soft);
  border-color: var(--sky);
}
.field .hint { font-size: 0.88rem; color: var(--muted); margin-top: 4px; }

.loads { display: grid; gap: 10px; }
.load {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.load:hover { border-color: var(--sky); }
.load.on { background: var(--leaf-soft); border-color: var(--leaf); }
.load input[type="checkbox"] { width: 22px; height: 22px; accent-color: var(--leaf); }
.load .name { font-weight: 700; line-height: 1.25; }
.load .name small { display: block; font-weight: 400; color: var(--muted); font-size: 0.82rem; }
.load .qty {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}
.load .qty input {
  width: 60px;
  padding: 6px 8px;
  border: 2px solid var(--line);
  border-radius: 10px;
  font-size: 0.95rem;
}

.result {
  margin-top: 22px;
  border-radius: var(--radius);
  padding: 24px;
  color: #fff;
  background: linear-gradient(135deg, #1fa971, #2b7de9);
}
.result.warn { background: linear-gradient(135deg, #ff9f1c, #e8590c); }
.result .label { font-size: 0.95rem; opacity: 0.95; }
.result .big { font-size: clamp(2rem, 6vw, 3rem); font-weight: 800; line-height: 1.1; margin: 4px 0 10px; }
.result .details { font-size: 0.95rem; opacity: 0.97; }
.result .details div { margin-top: 4px; }
.bar { height: 10px; background: rgba(255, 255, 255, 0.3); border-radius: 999px; margin-top: 14px; overflow: hidden; }
.bar i { display: block; height: 100%; background: #fff; border-radius: 999px; width: 0; transition: width 0.3s; }

.btn-small {
  background: var(--sky-soft);
  color: var(--sky);
  border: 0;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn-small:hover { background: var(--sky); color: #fff; }

footer.site {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.92rem;
}