/* ── Shared Navigation ── */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-top {
  padding: 18px 24px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--kana);
  font-weight: 700;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
  text-decoration: none;
}
.nav-logo-title {
  font-size: 15px;
  white-space: nowrap;
  font-family: 'Noto Sans Mono', var(--mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-country { font-size: 13px; line-height: 1; }
.nav-logo-en {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  font-weight: 300;
  margin-top: 1px;
}

/* Language switcher buttons (desktop) */
.nav-langs { display: flex; gap: 4px; }
.lang-btn {
  padding: 4px 14px;
  border-radius: 99px;
  border: 1px solid var(--border);
  font-size: 13px;
  cursor: pointer;
  background: transparent;
  color: var(--text-2);
  font-family: var(--kana);
  transition: all 0.15s;
  text-decoration: none;
  display: inline-block;
}
.lang-btn:hover { border-color: var(--border-md); color: var(--text); }
.lang-btn.active { border-color: var(--accent); color: var(--text); background: var(--bg); }

/* Language switcher dropdown (mobile) */
.nav-langs-mobile { display: none; }

/* Tab bar */
.nav-tabs {
  display: flex;
  border-top: 1px solid var(--border);
}
.nav-btn {
  flex: 1;
  padding: 9px 0;
  text-align: center;
  border: none;
  border-right: 1px solid var(--border);
  font-size: 13px;
  cursor: pointer;
  background: transparent;
  color: var(--text-2);
  font-family: inherit;
  transition: all 0.15s;
  letter-spacing: 0.02em;
  text-decoration: none;
  display: block;
}
.nav-btn:last-child { border-right: none; }
.nav-btn:hover { color: var(--text); background: var(--bg); }
.nav-btn.active {
  color: var(--text);
  font-weight: 500;
  box-shadow: inset 0 -2px 0 var(--accent);
  background: transparent;
}

/* Mobile */
@media (max-width: 580px) {
  .nav-langs { display: none; }
  .nav-langs-mobile {
    display: block;
    font-size: 13px;
    font-family: var(--kana);
    padding: 4px 8px;
    border-radius: 99px;
    border: 1px solid var(--accent);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%231c1b18'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 26px;
  }
  .nav-top { padding: 16px 14px 12px; }
  .nav-logo-title { font-size: 13px; }
  .nav-logo-en { display: block; font-size: 9px; }
  .nav-btn { font-size: 13px; padding: 8px 0; }
}