/* =========================================================================
   Nexus — Shell layout: top bar, main view, view switching, login gate
   ========================================================================= */

.nx-shell {
  display: grid;
  grid-template-rows: var(--nx-topbar-h) 1fr;
  height: 100vh;
  width: 100vw;
}

.nx-shell[hidden],
.nx-login[hidden],
[hidden] {
  display: none !important;
}

/* -------------------------------------------------------------------------
   Top bar — Nexus | Digital|Hardware|Wardrobe | 24h SGT clock
   ------------------------------------------------------------------------- */

.nx-topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1.1rem;
  border-bottom: 1px solid var(--nx-border);
  background: #050505;
  min-height: var(--nx-topbar-h);
}

.nx-brand {
  font-size: 1.35rem;
  color: var(--nx-blue-core);
  text-shadow:
    0 0 3px var(--nx-blue-core),
    0 0 8px var(--nx-glow),
    0 0 20px var(--nx-glow),
    0 0 40px var(--nx-glow-deep);
  white-space: nowrap;
}

.nx-brand-sub {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--nx-blue-dim);
  letter-spacing: 0.16em;
  margin-left: 0.55rem;
  text-shadow: none;
}

.nx-viewswitch {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  justify-self: center;
}

.nx-nav-btn {
  background: transparent;
  border: 1px solid var(--nx-blue-dim);
  color: var(--nx-blue-dim);
  font-family: var(--nx-font-head);
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.35rem 0.85rem;
  min-height: 36px;
  cursor: pointer;
  text-transform: uppercase;
}

.nx-nav-btn:hover {
  color: var(--nx-blue-bright);
  border-color: var(--nx-blue-bright);
}

.nx-nav-btn.is-active {
  color: var(--nx-blue-core);
  border-color: var(--nx-blue-bright);
  text-shadow: 0 0 4px var(--nx-blue-core), 0 0 8px var(--nx-blue);
  box-shadow:
    0 0 5px rgba(0, 195, 255, 0.4),
    0 0 12px var(--nx-glow),
    inset 0 0 6px rgba(0, 195, 255, 0.08);
}

.nx-switch-sep {
  color: var(--nx-blue-dim);
}

.nx-clock {
  justify-self: end;
  font-family: var(--nx-font-mono);
  color: var(--nx-blue);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.nx-clock-tz {
  color: var(--nx-text-dim);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  margin-left: 0.4rem;
}

/* -------------------------------------------------------------------------
   Main view area
   ------------------------------------------------------------------------- */

.nx-main {
  min-height: 0;
  padding: 0.75rem;
  overflow: hidden;
}

.nx-viewarea {
  height: 100%;
  background: var(--nx-surface);
  border: 1px solid var(--nx-border);
  padding: 1rem 1.1rem;
  overflow: auto;
}

.nx-pane-title {
  font-size: 0.95rem;
  color: var(--nx-blue);
  text-shadow:
    0 0 3px var(--nx-blue-bright),
    0 0 8px var(--nx-glow),
    0 0 20px var(--nx-glow);
  border-bottom: 1px solid var(--nx-border);
  padding-bottom: 0.45rem;
  margin-bottom: 0.85rem;
}

.nx-view[hidden] {
  display: none !important;
}

/* -------------------------------------------------------------------------
   Empty states
   ------------------------------------------------------------------------- */

.nx-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.55rem;
  min-height: calc(100% - 2.5rem);
  padding: 2.5rem 1rem;
  color: var(--nx-text-dim);
}

.nx-empty-ornament {
  color: var(--nx-blue-dim);
  font-family: var(--nx-font-mono);
  font-size: 0.85rem;
  line-height: 1.35;
  white-space: pre;
  margin-bottom: 0.6rem;
  opacity: 0.85;
}

.nx-empty .nx-h3 {
  color: var(--nx-blue);
  text-shadow: 0 0 6px var(--nx-glow);
}

/* -------------------------------------------------------------------------
   Login gate — same neon blue on black
   ------------------------------------------------------------------------- */

.nx-login {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nx-bg);
  padding: 1.5rem;
  overflow: hidden;
}

/* Bokeh circles on the login overlay */
.nx-login::before {
  content: '';
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(0, 102, 255, 0.1);
  filter: blur(90px);
  top: 12%;
  left: 8%;
  pointer-events: none;
}

.nx-login::after {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(0, 195, 255, 0.08);
  filter: blur(80px);
  bottom: 10%;
  right: 6%;
  pointer-events: none;
}

.nx-login-card {
  width: min(420px, 90vw);
  max-width: 90vw;
  background: rgba(0, 10, 30, 0.7);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(0, 153, 255, 0.4);
  padding: 2rem 1.6rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow:
    0 0 10px rgba(0, 153, 255, 0.3),
    0 0 30px rgba(0, 68, 255, 0.15),
    inset 0 0 12px rgba(0, 153, 255, 0.05);
}

.nx-login-wordmark {
  text-align: center;
  font-size: 1.6rem;
  color: var(--nx-blue-core);
  text-shadow:
    0 0 3px var(--nx-blue-core),
    0 0 8px var(--nx-glow),
    0 0 20px var(--nx-glow),
    0 0 40px var(--nx-glow-deep);
}

.nx-login-sub {
  text-align: center;
  color: var(--nx-text-dim);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-top: -0.4rem;
}

.nx-login-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.nx-login-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nx-login-label {
  font-family: var(--nx-font-head);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nx-text-dim);
}

.nx-login-form input {
  min-height: 36px;
  width: 100%;
}

.nx-login-note {
  color: var(--nx-blue-dim);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-align: center;
}

.nx-login-error {
  color: var(--nx-danger);
  font-size: 0.8rem;
  min-height: 1.1em;
  text-align: center;
}

.nx-login-submit {
  width: 100%;
  margin-top: 0.25rem;
  border-color: var(--nx-blue);
  color: var(--nx-blue-core);
  text-shadow: 0 0 4px var(--nx-blue-core), 0 0 10px var(--nx-blue);
  box-shadow:
    0 0 5px rgba(0, 195, 255, 0.5),
    0 0 15px var(--nx-glow),
    inset 0 0 8px rgba(0, 195, 255, 0.1);
}

.nx-login-submit:hover {
  color: #fff;
  border-color: var(--nx-blue-bright);
  box-shadow:
    0 0 8px #fff,
    0 0 20px var(--nx-blue-bright),
    0 0 40px var(--nx-glow),
    inset 0 0 12px rgba(0, 195, 255, 0.2);
}

/* -------------------------------------------------------------------------
   Mobile — Samsung A55 329px: stack the top bar, keep 36px targets
   ------------------------------------------------------------------------- */

@media (max-width: 720px) {
  /* The topbar wraps to two rows (brand+clock / nav). A fixed 52px first
     row made .nx-main's border slice through the nav buttons — P1.1 fix. */
  .nx-shell {
    grid-template-rows: auto 1fr;
  }

  .nx-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    gap: 0.45rem 0.75rem;
    padding: 0.45rem 0.7rem;
    min-width: 0;
    min-height: 0;
  }

  .nx-brand {
    font-size: 1.05rem;
  }

  .nx-brand-sub {
    /* FP#3 Rule 4: version stays visible on mobile — smaller, not hidden. */
    font-size: 0.55rem;
    margin-left: 0.35rem;
  }

  .nx-clock {
    font-size: 0.9rem;
  }

  .nx-viewswitch {
    grid-column: 1 / -1;
    justify-self: stretch;
    justify-content: space-between;
  }

  .nx-nav-btn {
    flex: 1;
    padding: 0.4rem 0.4rem;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
  }

  .nx-switch-sep {
    display: none;
  }

  /* Collapse the doubled border seam between adjacent tab buttons so the
     tab strip reads as one line. The separators are display:none but still
     sit between buttons in the DOM, so `+` never matched — use ~ instead. */
  .nx-viewswitch .nx-nav-btn ~ .nx-nav-btn {
    border-left-width: 0;
  }

  .nx-nav-btn.is-active {
    /* Keep the active tab's left edge intact when neighbours drop theirs. */
    border-left-width: 1px;
  }

  .nx-main {
    padding: 0.5rem;
  }

  html {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
}