/* ===============================
   Fuwari-like Navbar (Final CSS)
   - Light/Dark tokens
   - Container width match
   - Top-flush (no radius on top)
   - Link/btn hover + active underline
   - Icon/title vertical alignment
   =============================== */

/* ---------- THEME TOKENS ---------- */
/* Light mode */
:root {
  --fw-max: 1100px;                  /* match your page container max-width */
  --nav-fg: #2a2730;                 /* dark readable text */
  --nav-bg: rgba(255, 255, 255, .85);/* light glass background */
  --nav-border: rgba(0, 0, 0, .10);  /* subtle border in light mode */
  --brand: #b155f1;
  --brand-2: #5ad0ff;
}

/* Dark mode */
html[data-theme="dark"] {
  --nav-fg: #f3f4f6;                 /* soft white text */
  --nav-bg: rgba(20, 22, 30, .78);   /* cool charcoal glass */
  /* If you prefer a faint cool gradient instead, use:
     --nav-bg: linear-gradient(135deg, rgba(35,40,60,.82) 0%, rgba(20,22,30,.82) 60%);
  */
  --nav-border: rgba(255, 255, 255, .06);
}

/* ---------- WRAPPER ---------- */
.fw-nav {
  position: sticky;
  top: 0;
  z-index: 1040;
  padding: 0 .8rem .6rem;            /* top=0 to sit flush; keep bottom padding for drop shadow */
  background: transparent;
}

/* ---------- BAR ---------- */
.fw-nav-bar {
  width: 70%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: .5rem;
  border: 1px solid var(--nav-border);
  background:
    radial-gradient(1000px 400px at 10% -20%, rgba(177,85,241,.10), transparent 60%),
    var(--nav-bg);
  color: var(--nav-fg);
  border-radius: 0 0 1rem 1rem;      /* flat on top, rounded bottom (Fuwari-style) */
  padding: .55rem .6rem;
  box-shadow:
    0 1px 0 rgba(255,255,255,.04) inset,
    0 10px 30px rgba(0,0,0,.35);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.fw-nav-bar > * { justify-self: start; }
.fw-actions,
.fw-mobile-toggle { justify-self: end; width: max-content; }

.fw-btn, .fw-mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .45rem .55rem;
  line-height: 0;
  /* …your existing styles… */
}

/* show links on desktop, hide hamburger; inverse on mobile */
.fw-mobile-toggle { display: inline-flex; }
@media (max-width: 1200px) {
    .fw-nav-bar {width: 100%; }
  .fw-nav-bar { grid-template-columns: auto 1fr auto auto; }
}


/* ---------- BRAND ---------- */
.fw-brand {
  justify-self: start;
  display: inline-flex; align-items: center; gap: .5rem;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--nav-fg);
  padding: .35rem .6rem;
  border-radius: .7rem;
  line-height: 1;                     /* align icon + text baseline */
}
.fw-home-icon svg { display: block; transform: translateY(.5px); }
.fw-home-icon { color: #e38bff; }

/* ---------- LINKS ---------- */
.fw-nav-links { justify-self: center; display: none; gap: .25rem; }
.fw-nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: .5rem .8rem;
  border-radius: .7rem;
  color: var(--nav-fg);
  opacity: .92;
  text-decoration: none;
  transition: background-color .15s ease, opacity .2s ease, transform .15s ease;
}
.fw-nav-links a:hover { background: rgba(255,255,255,.06); opacity: 1; transform: translateY(-1px); }
.fw-nav-links a::after {
  content: "";
  position: absolute;
  left: .9rem; right: .9rem; bottom: .35rem;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  opacity: 0; transform: scaleX(.5);
  transition: transform .2s ease, opacity .2s ease;
  border-radius: 2px;
}
.fw-nav-links a.is-active::after,
.fw-nav-links a:focus-visible::after { opacity: 1; transform: scaleX(1); }

/* ---------- ACTIONS (theme + hamburger) ---------- */
.fw-actions { justify-self: end; display: flex; gap: .35rem; align-items: center; }
.fw-btn, .fw-mobile-toggle {
  border: 1px solid var(--nav-border);
  background: rgba(255,255,255,.06);
  color: var(--nav-fg);
  padding: .45rem .55rem;
  border-radius: .7rem;
  line-height: 0;
  transition: transform .15s ease, box-shadow .2s ease, background-color .15s ease;
}
.fw-btn:hover, .fw-mobile-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
  background: rgba(255,255,255,.12);
}
.fw-btn .icon-moon { display: none; }
html[data-theme="dark"] .fw-btn .icon-sun { display: none; }
html[data-theme="dark"] .fw-btn .icon-moon { display: inline-block; }

/* ---------- MOBILE ---------- */
.fw-mobile-toggle { display: inline-flex; align-items:center; justify-content:center; }
@media (min-width: 992px) {
  .fw-mobile-toggle { display: none; }
  .fw-nav-links { display: inline-flex; }
}
.fw-mobile-panel {
  width: min(var(--fw-max), calc(100% - 1.2rem));
  margin: .45rem auto 0;
  display: grid;
  gap: .25rem;
  border: 1px solid var(--nav-border);
  background: var(--nav-bg);
  color: var(--nav-fg);
  border-radius: .9rem;
  padding: .4rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.fw-mobile-panel a {
  text-decoration: none;
  color: var(--nav-fg);
  padding: .6rem .7rem;
  border-radius: .7rem;
}
.fw-mobile-panel a.is-active,
.fw-mobile-panel a:hover { background: rgba(255,255,255,.06); }

/* ---------- A11Y helper ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}