/* ============================================================
   nav.css — Navigation bar, logo, buttons, hamburger, mobile menu
   ============================================================ */

/* ── NAV ─────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 12px;
  z-index: 50;
  margin: 12px auto 0;
  max-width: calc(var(--max) - 56px);
  background: rgba(31, 35, 51, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border: 1px solid var(--pb);
  border-radius: 14px;
  padding: 10px 14px 10px 18px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  color: var(--t0);
  letter-spacing: -0.02em;
  font-size: 15px;
}
.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, #8b92ff 0%, #5560e8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 10px rgba(102,116,255,0.35);
  flex-shrink: 0;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  margin-left: 20px;
}
nav ul a {
  padding: 7px 14px;
  border-radius: 7px;
  font-size: 13.5px;
  color: var(--t1);
  transition: all 0.15s;
}
nav ul a:hover {
  color: var(--t0);
  background: var(--bg2);
}
.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 9px;
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.15s;
  text-decoration: none;
}
.btn-ghost {
  color: var(--t1);
  background: transparent;
}
.btn-ghost:hover {
  color: var(--t0);
  background: var(--bg2);
}
.btn-primary {
  background: linear-gradient(180deg, #7a86ff 0%, var(--acc) 100%);
  color: #fff;
  border: 1px solid #7a86ff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.12) inset,
    0 4px 14px rgba(102, 116, 255, 0.35);
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.12) inset,
    0 6px 22px rgba(102, 116, 255, 0.55);
}
.btn-secondary {
  background: var(--bg2);
  color: var(--t0);
  border: 1px solid var(--border2);
}
.btn-secondary:hover {
  background: var(--bg3);
}
.btn-lg {
  padding: 12px 22px;
  font-size: 14.5px;
  border-radius: 11px;
}

/* ── TQS BRANDING ──────────────────────────────────── */
.tqs-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 8px;
  padding: 5px 10px 5px 7px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
  cursor: pointer;
}
.tqs-badge:hover {
  background: var(--bg3);
  border-color: var(--acc-soft);
}
.tqs-badge img {
  height: 18px;
  width: auto;
  border-radius: 3px;
  background: #000;
  display: block;
}
.tqs-badge-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--t2);
  letter-spacing: 0.03em;
  white-space: nowrap;
  line-height: 1;
}
.tqs-badge-label span {
  color: var(--t0);
  font-weight: 700;
}
.ft-tqs {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}
.ft-tqs-label {
  font-size: 12px;
  color: var(--t3);
  letter-spacing: 0.02em;
}
.ft-tqs img {
  height: 22px;
  width: auto;
  border-radius: 4px;
  background: #000;
  padding: 2px 4px;
}
.nav-tqs {
  display: flex;
  align-items: center;
  gap: 6px;
  border-left: 1px solid var(--border);
  padding-left: 14px;
  margin-left: 4px;
}
.nav-tqs-label {
  font-size: 10.5px;
  color: var(--t3);
  font-weight: 500;
  letter-spacing: 0.03em;
}
.nav-tqs img {
  height: 16px;
  width: auto;
  border-radius: 2px;
  background: #000;
  padding: 1px 3px;
}