/* ============================================================
   Peptide Learning Center — clone design system
   Dark research-wiki theme · mint accent · refined layout
   ============================================================ */
:root {
  --bg: #071725;
  --bg-2: #0a1e30;
  --surface: #0d2b3a;
  --surface-2: #0e3540;
  --border: #0b3c2b;
  --border-soft: rgba(0, 219, 171, 0.14);
  --primary: #00dbab;
  --primary-dim: #0aa985;
  --primary-glow: rgba(0, 219, 171, 0.22);
  --text: #f2f6f8;
  --muted: #94a8b6;
  --muted-2: #6b8292;
  --amber: #f5b455;
  --danger: #ff7a6e;
  --radius: 10px;
  --radius-sm: 7px;
  --font-sans: "Fira Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --shadow-1: 0 10px 30px rgba(2, 10, 20, 0.55);
  --header-h: 62px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(0, 219, 171, 0.07), transparent 60%),
    radial-gradient(900px 480px at -10% 20%, rgba(24, 110, 190, 0.08), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; transition: color 0.18s ease; }
a:hover { color: #7df0d4; }
img, svg { max-width: 100%; }
::selection { background: var(--primary-glow); color: #fff; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; line-height: 1.12; margin: 0 0 0.45em; letter-spacing: 0.2px; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.main-col { max-width: 960px; }

/* ---------- badge / eyebrow ---------- */
.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.eyebrow .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 8px var(--primary); }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--primary); background: rgba(0, 219, 171, 0.08);
  border: 1px solid var(--border-soft); border-radius: 999px; padding: 4px 12px;
  white-space: nowrap;
}
.chip--solid { background: var(--primary); color: #06231c; border-color: var(--primary); font-weight: 700; }
.chip--dim { color: var(--muted); border-color: rgba(148, 168, 182, 0.25); background: rgba(148, 168, 182, 0.06); }
.chip--amber { color: var(--amber); border-color: rgba(245, 180, 85, 0.35); background: rgba(245, 180, 85, 0.08); }

/* ---------- disclaimer bar ---------- */
.topbar {
  background: linear-gradient(90deg, rgba(255, 122, 110, 0.12), rgba(255, 122, 110, 0.04) 60%);
  border-bottom: 1px solid rgba(255, 122, 110, 0.25);
  color: #ffd9d5;
  font-size: 12.5px;
  padding: 8px 16px;
  text-align: center;
  letter-spacing: 0.02em;
}
.topbar strong { color: #ffb3ab; }
.topbar b, .topbar strong { font-weight: 700; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(7, 23, 37, 0.82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 18px; width: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); letter-spacing: 0.01em; }
.brand:hover { color: var(--primary); }
.brand svg { display: block; }
.brand img.brand-logo { display: block; border-radius: 10px; }
.brand-name { font-size: 15px; line-height: 1.15; }
.brand-sub { display: block; font-size: 10px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); }
.header-search { flex: 1; max-width: 420px; margin-left: auto; position: relative; }
.header-search form { display: flex; }
.header-search input {
  width: 100%; border: 1px solid var(--border); background: rgba(13, 43, 58, 0.6);
  color: var(--text); border-radius: 999px; padding: 8px 38px 8px 16px; font-size: 13.5px; outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.header-search input::placeholder { color: var(--muted-2); }
.header-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.header-search button {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--muted); cursor: pointer; padding: 6px;
}
.header-search button:hover { color: var(--primary); }
.header-links { display: flex; align-items: center; gap: 10px; }
.nav-link { color: var(--muted); font-size: 13.5px; font-weight: 600; padding: 6px 12px; border-radius: 999px; }
.nav-link:hover { color: var(--primary); background: rgba(0, 219, 171, 0.07); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 999px; padding: 8px 18px;
  font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all 0.18s ease; background: none; color: var(--text);
  text-decoration: none; line-height: 1.2;
}
.btn--primary { background: var(--primary); color: #04231b; }
.btn--primary:hover { background: #2cf0c4; color: #04231b; box-shadow: 0 0 18px var(--primary-glow); }
.btn--ghost { border-color: var(--border); color: var(--muted); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn--outline { border-color: var(--primary); color: var(--primary); }
.btn--outline:hover { background: var(--primary); color: #04231b; }
.btn--sm { padding: 5px 13px; font-size: 12.5px; }
.btn--lg { padding: 12px 26px; font-size: 15px; }
.btn--whatsapp { background: #25d366; color: #052e16; }
.btn--whatsapp:hover { background: #4ceb87; color: #052e16; box-shadow: 0 0 18px rgba(37, 211, 102, 0.4); }
.btn--telegram { background: #229ed9; color: #04202e; }
.btn--telegram:hover { background: #4db8ea; color: #04202e; box-shadow: 0 0 18px rgba(34, 158, 217, 0.4); }

/* ---------- burger ---------- */
.burger {
  display: none; background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); width: 40px; height: 40px; cursor: pointer; align-items: center; justify-content: center;
}
.burger svg { width: 20px; height: 20px; }

/* ---------- layout ---------- */
.layout { display: flex; gap: 44px; padding: 34px 0 60px; flex: 1; }
.sidebar { width: 256px; flex-shrink: 0; position: sticky; top: calc(var(--header-h) + 24px); align-self: flex-start; max-height: calc(100vh - var(--header-h) - 40px); overflow-y: auto; scrollbar-width: thin; padding-right: 4px; }
.content { flex: 1; min-width: 0; }

.nav-group { margin-bottom: 24px; }
.nav-group-label {
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--muted-2); margin-bottom: 8px; padding-left: 10px;
}
.nav-item { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13.5px; padding: 5.5px 10px; border-radius: var(--radius-sm); line-height: 1.35; }
.nav-item:hover { color: var(--primary); background: rgba(0, 219, 171, 0.06); }
.nav-item.active { color: var(--primary); background: rgba(0, 219, 171, 0.1); }
.nav-item .nav-ic { width: 15px; text-align: center; font-size: 12px; flex-shrink: 0; color: var(--primary); opacity: 0.8; }
.nav-item:hover .nav-ic, .nav-item.active .nav-ic { opacity: 1; text-shadow: 0 0 10px var(--primary-glow); }
.nav-item .nav-label { flex: 1; min-width: 0; }
.nav-item .cnt { font-size: 11px; color: var(--muted-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.nav-item.active .cnt { color: var(--muted); }

/* ---------- hero ---------- */
.hero { position: relative; border-bottom: 1px solid var(--border); padding: 34px 0 44px; margin-bottom: 46px; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; right: -120px; top: -160px; width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(0, 219, 171, 0.13), transparent 65%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1fr 240px; gap: 34px; align-items: center; }
.hero h1 { font-size: clamp(44px, 5.2vw, 72px); margin: 6px 0 18px; }
.hero .lead { color: var(--muted); font-size: 17px; max-width: 640px; line-height: 1.75; }
.hero .lead strong { color: var(--text); font-weight: 600; }
.hero-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; align-items: center; }
.hero-logo { justify-self: center; animation: float 7s ease-in-out infinite; }
.hero-logo svg, .hero-logo img { filter: drop-shadow(0 0 30px var(--primary-glow)); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ---------- section headers ---------- */
.sec { margin-bottom: 52px; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.sec-head h2 { font-size: clamp(24px, 2.4vw, 32px); }
.sec-head .more { font-size: 13px; color: var(--muted); white-space: nowrap; }
.sec-head .more:hover { color: var(--primary); }

/* ---------- featured cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature-card {
  display: flex; flex-direction: column; gap: 6px; position: relative;
  padding: 18px 16px 14px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(13, 43, 58, 0.5), rgba(7, 23, 37, 0.2));
  border: 1px solid transparent;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  min-height: 168px;
}
.feature-card:hover { background: linear-gradient(160deg, rgba(0, 219, 171, 0.1), rgba(13, 43, 58, 0.35)); border-color: var(--border-soft); transform: translateY(-2px); }
.feature-card .num { font-size: 11px; font-weight: 700; letter-spacing: 0.14em; color: var(--primary); opacity: 0.85; }
.feature-card h3 { font-size: 20px; margin: 2px 0 2px; }
.feature-card p { color: var(--muted); font-size: 13.5px; margin: 0; line-height: 1.55; flex: 1; }
.feature-card .readmore { font-size: 11.5px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; margin-top: 6px; }
.feature-card:hover .readmore { color: var(--primary); }

/* ---------- numbered rows (sourcing / categories) ---------- */
.row-card {
  display: block; padding: 18px 4px 16px; border-top: 1px solid var(--border);
  transition: border-color 0.2s ease;
}
.row-card:hover { border-top-color: var(--primary); }
.row-card-inner { display: flex; gap: 20px; align-items: flex-start; }
.row-num { font-family: var(--font-display); font-size: 26px; color: var(--primary); opacity: 0.75; min-width: 52px; line-height: 1; }
.row-main { flex: 1; min-width: 0; }
.row-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.row-card h3 { font-size: 19px; margin: 2px 0 3px; font-family: var(--font-sans); font-weight: 600; }
.row-card p { color: var(--muted); font-size: 13.8px; margin: 0 0 8px; max-width: 720px; }
.row-action { font-size: 11.5px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: inline-flex; gap: 6px; align-items: center; }
.row-card:hover .row-action { color: var(--primary); }
.members-only { color: var(--amber); }

/* ---------- profile listing ---------- */
.list-two { display: grid; grid-template-columns: 1fr 1fr; column-gap: 26px; row-gap: 2px; }
.row-link { display: flex; justify-content: space-between; gap: 14px; align-items: baseline; padding: 7px 10px; border-radius: var(--radius-sm); color: var(--text); font-size: 14px; }
.row-link:hover { background: rgba(0, 219, 171, 0.07); }
.row-link .c { color: var(--muted-2); font-size: 11.5px; font-variant-caps: all-small-caps; white-space: nowrap; }

/* ---------- prose ---------- */
.prose { max-width: 780px; }
.prose h1 { font-size: clamp(30px, 3.4vw, 42px); margin-bottom: 6px; }
.prose .sub { color: var(--muted); font-size: 15.5px; margin-top: 0; }
.prose h2 { font-size: 23px; margin: 34px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.prose h3 { font-size: 18px; margin: 24px 0 8px; font-family: var(--font-sans); font-weight: 600; }
.prose p { color: #cddbe3; font-size: 15.8px; line-height: 1.8; margin: 0 0 14px; }
.prose ul, .prose ol { color: #cddbe3; font-size: 15.5px; line-height: 1.75; padding-left: 22px; margin: 0 0 16px; }
.prose li { margin-bottom: 5px; }
.prose li::marker { color: var(--primary); }
.prose strong { color: var(--text); }
.prose code { font-size: 13.5px; background: rgba(0, 219, 171, 0.08); border: 1px solid var(--border-soft); border-radius: 5px; padding: 1px 7px; color: #7df0d4; }
.breadcrumb { font-size: 12.5px; color: var(--muted-2); margin-bottom: 10px; }
.breadcrumb a { color: var(--muted-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 7px; opacity: 0.5; }

/* related chips */
.related-list { display: flex; flex-wrap: wrap; gap: 10px; }
.rel-chip { display: inline-flex; flex-direction: column; gap: 2px; border: 1px solid var(--border); background: rgba(13, 43, 58, 0.4); color: var(--text); border-radius: var(--radius-sm); padding: 10px 14px; font-size: 13.5px; max-width: 260px; transition: border-color .18s ease, transform .18s ease; }
.rel-chip:hover { border-color: var(--primary); transform: translateY(-1px); }
.rel-chip small { color: var(--muted); font-size: 11.8px; line-height: 1.4; }

/* ---------- tools / boxes ---------- */
.card {
  background: linear-gradient(160deg, rgba(13, 43, 58, 0.55), rgba(7, 23, 37, 0.35));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
}
.card--flat { background: none; border: none; padding: 0; }
.note { border-left: 3px solid var(--primary); background: rgba(0, 219, 171, 0.06); padding: 14px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 14.5px; color: #b9cdd6; margin: 18px 0; }
.note--amber { border-left-color: var(--amber); background: rgba(245, 180, 85, 0.07); color: #ecd7b2; }
.note--red { border-left-color: var(--danger); background: rgba(255, 122, 110, 0.08); color: #f4c9c4; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat { text-align: center; padding: 20px 10px; }
.stat b { display: block; font-family: var(--font-display); font-size: 34px; color: var(--primary); line-height: 1.1; }
.stat span { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted-2); }

/* ---------- calculator ---------- */
.calc { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.calc label { display: block; font-size: 12.5px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin: 14px 0 6px; }
.calc input, .calc select {
  width: 100%; background: rgba(7, 23, 37, 0.7); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 10px 14px; font-size: 15px; outline: none; font-family: var(--font-sans);
}
.calc input:focus, .calc select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.calc .out { font-family: var(--font-sans); }
.result-box { border: 1px solid var(--border-soft); background: rgba(0, 219, 171, 0.05); border-radius: var(--radius); padding: 18px 20px; }
.result-box .big { font-size: 30px; font-weight: 600; color: var(--primary); font-variant-numeric: tabular-nums; }
.result-line { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px dashed rgba(148, 168, 182, 0.15); font-size: 14px; color: #b9cdd6; }
.result-line:last-child { border-bottom: none; }
.result-line span:last-child { color: var(--text); font-weight: 600; }

/* ---------- tables ---------- */
.tbl-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--border); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
.tbl th { text-align: left; font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-2); padding: 11px 16px; border-bottom: 1px solid var(--border); background: rgba(0, 219, 171, 0.04); font-weight: 700; }
.tbl td { padding: 10px 16px; border-bottom: 1px solid rgba(11, 60, 43, 0.6); color: #cddbe3; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: rgba(0, 219, 171, 0.03); }

/* ---------- search results ---------- */
.result-item { border-top: 1px solid var(--border); padding: 16px 4px 14px; transition: border-color .2s; }
.result-item:hover { border-top-color: var(--primary); }
.result-item h3 { font-size: 19px; margin: 2px 0 4px; font-family: var(--font-sans); font-weight: 600; }
.result-item h3 a { color: var(--text); }
.result-item h3 a:hover { color: var(--primary); }
.result-item p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: rgba(11, 60, 43, 0.1); margin-top: auto; }
.footer-bottom {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch;
  padding: 30px 0 26px;
}
.footer-card {
  display: flex; flex-direction: column; gap: 12px;
  background: linear-gradient(160deg, rgba(13, 43, 58, 0.5), rgba(7, 23, 37, 0.25));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.footer-card:hover { border-color: var(--border-soft); transform: translateY(-1px); }
.footer-card--cta { border-color: var(--border-soft); }
.footer-card .fc-title {
  font-family: var(--font-display); font-size: 20px; line-height: 1.3; margin: 0; color: var(--text);
}
.footer-card .fc-btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: auto; padding-top: 8px; }
.footer-card .fc-label {
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--primary); font-family: var(--font-sans);
}
.footer-card .fc-label--danger { color: var(--danger); }
.footer-card .fc-social { display: flex; gap: 10px; flex-wrap: wrap; }
.fs-link {
  width: 38px; height: 38px; border: 1px solid var(--border); border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; color: var(--muted);
  font-size: 15.5px; background: rgba(7, 23, 37, 0.55); transition: all 0.18s ease; text-decoration: none;
}
.fs-link:hover { color: #04231b; background: var(--primary); border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 0 16px var(--primary-glow); }
.fs-link:active { transform: translateY(0); }
.footer-card .fc-note, .footer-card .fc-copy, .footer-card .fc-legal { color: var(--muted); font-size: 13px; line-height: 1.75; margin: 0; }
.footer-card .fc-note { font-size: 12.6px; }
.footer-card--legal { background: rgba(255, 122, 110, 0.04); border-color: rgba(255, 122, 110, 0.18); }
.footer-card--legal:hover { border-color: rgba(255, 122, 110, 0.45); }
.footer-card .fc-legal { color: #c3b8b4; }
.footer-card .fc-links { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: auto; }
.footer-card .fc-links a { color: var(--muted); font-size: 13px; }
.footer-card .fc-links a:hover { color: var(--primary); }
.footer-meta {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px 18px;
  border-top: 1px solid var(--border); padding: 16px 0 26px; color: var(--muted-2); font-size: 12.5px;
}
.footer-meta .fm-links { display: inline-flex; flex-wrap: wrap; gap: 4px 0; }
.footer-meta a { color: var(--muted-2); }
.footer-meta a:hover { color: var(--primary); }

/* ---------- mobile drawer ---------- */
.drawer-backdrop { position: fixed; inset: 0; background: rgba(2, 8, 14, 0.7); z-index: 90; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; }
.drawer-backdrop.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: min(320px, 86vw); z-index: 95;
  background: var(--bg-2); border-right: 1px solid var(--border); overflow-y: auto; padding: 20px 18px 40px;
  transform: translateX(-105%); transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.drawer.open { transform: translateX(0); }
.drawer .drawer-close { position: absolute; top: 14px; right: 14px; background: none; border: 1px solid var(--border); color: var(--muted); border-radius: 8px; width: 34px; height: 34px; cursor: pointer; }
.mobile-quick { display: none; }

/* ---------- misc ---------- */
.divider { border: none; border-top: 1px solid var(--border); margin: 26px 0; }
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 8px; } .mt-2 { margin-top: 18px; } .mt-3 { margin-top: 30px; } .mt-4 { margin-top: 44px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 18px; } .mb-3 { margin-bottom: 30px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 13.5px; }
.hidden { display: none !important; }
.text-primary { color: var(--primary); }

/* ---------- collapse all profiles ---------- */
.collapse-wrap { position: relative; }
#allProfiles { display: none; }
#allProfiles.show { display: block; animation: fadeUp 0.4s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- FAQ ---------- */
details.faq { border-top: 1px solid var(--border); padding: 14px 2px; }
details.faq summary { cursor: pointer; font-weight: 600; font-size: 15.5px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--primary); font-size: 20px; transition: transform 0.2s; }
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq p { color: var(--muted); font-size: 14.5px; line-height: 1.75; margin: 10px 0 4px; max-width: 820px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .sidebar { display: none; }
  .mobile-quick { display: block; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-logo { display: none; }
  .calc, .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .burger { display: inline-flex; }
  .header-search { order: 3; max-width: none; flex-basis: 100%; margin-left: 0; }
  .header-links .nav-link--hide { display: none; }
  .grid-3, .grid-2, .grid-4, .list-two { grid-template-columns: 1fr; }
  .container { padding: 0 18px; }
  .sec-head { flex-direction: column; align-items: flex-start; }
  .footer-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
}
@media (max-width: 900px) {
  .footer-bottom { grid-template-columns: 1fr; gap: 14px; }
}