/* ============================================================
   NIKA APP SHELL  --  B-5 SKELETON, 2026-07-30
   MARKER: B5-SKELETON-20260730-MARKER

   Sidebar + topbar + page grid + the shared primitives every new
   surface uses (card, btn, chip, form row, table). Consumes ONLY
   the --nk-* tokens from nika-tokens.css.

   Structure follows docs/NIKA_CHAT_UI_DESIGN_0730.md SIDEBAR MENU:
     Menu          logo, collapse toggle, search (v2 -- rendered
                   disabled with a named "coming" state, never a
                   dead control)
     HOME          + New, Chats and tasks, Projects, Artifacts,
                   Scheduled, Customize
     THREADS       Pinned / Recent / Other   (B5-9 -- stub group)
     USER ACCOUNT  name + plan -> menu
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

body.nk-app {
  margin: 0;
  font-family: var(--nk-sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--nk-ink);
  background: var(--nk-cream);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--nk-azure-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--nk-serif); font-weight: 400; letter-spacing: -.02em; margin: 0; color: var(--nk-ink); }
h1 { font-size: 30px; }
h2 { font-size: 21px; }
h3 { font-size: 17px; font-family: var(--nk-sans); font-weight: 700; }
p { margin: 0 0 .9em; color: var(--nk-muted); }
img, svg { display: block; max-width: 100%; }

/* ---- layout grid ------------------------------------------------- */
.nk-shell { display: grid; grid-template-columns: var(--nk-sidebar-w) 1fr; min-height: 100vh; }
.nk-shell.is-collapsed { grid-template-columns: var(--nk-sidebar-w-collapsed) 1fr; }

/* ---- sidebar ----------------------------------------------------- */
.nk-side {
  background: var(--nk-cream-2);
  border-right: 1px solid var(--nk-border-soft);
  padding: 18px 14px 26px;
  display: flex; flex-direction: column; gap: 22px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.nk-side-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.nk-logo { display: inline-flex; align-items: center; gap: 8px; color: var(--nk-ink); font-family: var(--nk-serif); font-size: 19px; }
.nk-logo:hover { text-decoration: none; }
.nk-logo img { height: 44px; width: auto; max-width: 200px; mix-blend-mode: multiply; }  /* LAND-ST5-20260831-MARKER: [T] logo bigger + responsive (~50px pattern; 44px in narrow heads). NOTE: also sizes the signed-in account shell logo -- flagged in the build doc. */
.nk-collapse {
  border: 1px solid var(--nk-border); background: var(--nk-white); color: var(--nk-muted);
  border-radius: var(--nk-radius-sm); width: 30px; height: 30px; cursor: pointer;
  font-size: 15px; line-height: 1; flex: none;
}
.nk-collapse:hover { background: var(--nk-azure-soft); color: var(--nk-azure-deep); }

.nk-side-search { position: relative; }
.nk-side-search input {
  width: 100%; font: inherit; font-size: 14px; padding: 9px 12px;
  border: 1px solid var(--nk-border); border-radius: 999px; background: var(--nk-white); color: var(--nk-ink);
}
.nk-side-search input:disabled { background: var(--nk-cream); color: var(--nk-muted-soft); cursor: not-allowed; }

.nk-group { display: flex; flex-direction: column; gap: 2px; }
.nk-group-label {
  font-size: 10.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--nk-muted-soft); padding: 0 10px 6px;
}
.nk-nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--nk-radius-sm);
  color: var(--nk-ink-soft); font-size: 14.5px; font-weight: 500;
}
.nk-nav-item:hover { background: var(--nk-azure-soft); color: var(--nk-azure-deep); text-decoration: none; }
.nk-nav-item.is-active { background: var(--nk-azure-soft); color: var(--nk-azure-deep); font-weight: 600; }
.nk-nav-item .nk-ico { width: 18px; text-align: center; flex: none; color: var(--nk-azure); }
.nk-nav-item.is-pending { color: var(--nk-muted-soft); cursor: default; }
.nk-nav-item.is-pending:hover { background: transparent; color: var(--nk-muted-soft); text-decoration: none; }
.nk-soon {
  margin-left: auto; font-size: 10px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--nk-muted-soft); background: var(--nk-white); border: 1px solid var(--nk-border);
  border-radius: 999px; padding: 1px 7px;
}
.nk-empty-note { padding: 4px 10px 0; font-size: 12.5px; color: var(--nk-muted-soft); }

.nk-side-foot { margin-top: auto; }
.nk-userchip {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 10px; border-radius: var(--nk-radius-sm);
  background: var(--nk-white); border: 1px solid var(--nk-border); color: var(--nk-ink);
}
.nk-userchip:hover { border-color: var(--nk-azure); text-decoration: none; }
.nk-avatar {
  width: 30px; height: 30px; border-radius: 50%; flex: none;
  background: var(--nk-azure-soft); color: var(--nk-azure-deep);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px;
}
.nk-userchip-txt { min-width: 0; }
.nk-userchip-name { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nk-userchip-plan { font-size: 11.5px; color: var(--nk-muted); }

/* collapsed state: icons only */
.is-collapsed .nk-side { padding: 18px 8px 26px; }
.is-collapsed .nk-label,
.is-collapsed .nk-group-label,
.is-collapsed .nk-side-search,
.is-collapsed .nk-soon,
.is-collapsed .nk-empty-note,
.is-collapsed .nk-userchip-txt,
.is-collapsed .nk-logo span { display: none; }
.is-collapsed .nk-nav-item { justify-content: center; padding: 9px 0; }

/* ---- main -------------------------------------------------------- */
.nk-main { min-width: 0; display: flex; flex-direction: column; }
.nk-topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 32px; border-bottom: 1px solid var(--nk-border-soft); background: var(--nk-cream);
}
.nk-topbar-title { font-family: var(--nk-serif); font-size: 19px; }
.nk-topbar-actions { display: flex; align-items: center; gap: 10px; }
.nk-page { padding: 28px 32px 64px; max-width: 1040px; width: 100%; }
.nk-page-head { margin-bottom: 22px; }
.nk-page-head p { margin-top: 6px; }

/* ---- primitives -------------------------------------------------- */
.nk-card {
  background: var(--nk-white); border: 1px solid var(--nk-border);
  border-radius: var(--nk-radius); padding: 22px 24px; box-shadow: var(--nk-shadow-sm);
  margin-bottom: 18px;
}
.nk-card > h2 { margin-bottom: 4px; }
.nk-card > h2 + p { margin-bottom: 16px; }

.nk-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--nk-sans); font-weight: 600; font-size: 14.5px; cursor: pointer;
  padding: 10px 20px; border-radius: 999px; border: 1px solid transparent;
  background: var(--nk-azure-deep); color: #fff;
  transition: filter .15s ease, background .15s ease, transform .12s ease;  /* LAND-ST4-20260831-MARKER: [T] snag -- hover transition on buttons */
}
.nk-btn:hover { filter: brightness(.96); text-decoration: none; }
.nk-btn-outline { background: transparent; color: var(--nk-ink); border-color: var(--nk-border); }
.nk-btn-outline:hover { background: var(--nk-cream-2); }
.nk-btn-cerise { background: var(--nk-cerise); color: #fff; }
.nk-btn-cerise:hover { background: var(--nk-cerise-deep); }
.nk-btn-sm { padding: 7px 14px; font-size: 13.5px; }
.nk-btn[disabled], .nk-btn.is-disabled { opacity: .5; cursor: not-allowed; }
.nk-btn:active { transform: translateY(1px); }  /* LAND-ST4-20260831-MARKER */
/* LAND-ST4-20260831-MARKER: the nk-password.js injected Show/Hide button
   ([T] snag LOGIN FORM: "'Show Password' button needs CSS styling") -- it was
   unstyled anywhere, rendering as a bare UA button. Azure family, transition,
   no underline (R-5). */
.nk-pw-eye { font-family: var(--nk-sans); font-size: 12.5px; font-weight: 600; cursor: pointer;
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--nk-border);
  background: var(--nk-card, #FCFCFB); color: var(--nk-ink-soft);
  transition: background .15s ease, color .15s ease, border-color .15s ease; }
.nk-pw-eye:hover { background: var(--nk-azure-soft); color: var(--nk-azure-deep);
  border-color: var(--nk-azure); }

.nk-chip {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600;
  padding: 4px 11px; border-radius: 999px; background: var(--nk-azure-soft); color: var(--nk-azure-deep);
}
.nk-chip-gold { background: #fbf3e0; color: #8a6a1f; }
.nk-chip-muted { background: var(--nk-cream-2); color: var(--nk-muted); }

.nk-note {
  border: 1px solid var(--nk-border); background: var(--nk-azure-soft);
  border-radius: var(--nk-radius-sm); padding: 12px 14px; font-size: 13.5px; color: var(--nk-ink-soft);
  margin: 0 0 16px;
}
.nk-note strong { color: var(--nk-azure-deep); }
.nk-note-warn { background: #fbf3e0; border-color: #e9d19c; }
.nk-msg-ok  { color: var(--nk-ok);  font-weight: 600; }
.nk-msg-err { color: var(--nk-err); font-weight: 600; }

/* ---- forms ------------------------------------------------------- */
.nk-field { margin-bottom: 16px; }
.nk-field > label { display: block; font-size: 12.5px; font-weight: 700; color: var(--nk-ink-soft); margin-bottom: 6px; }
.nk-field .nk-hint { font-size: 12.5px; color: var(--nk-muted); margin: 6px 0 0; }
input[type=text], input[type=email], input[type=password], select, textarea {
  width: 100%; font: inherit; font-size: 14.5px; color: var(--nk-ink); background: var(--nk-white);
  border: 1px solid var(--nk-border); border-radius: var(--nk-radius-sm); padding: 11px 14px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--nk-azure); box-shadow: 0 0 0 3px var(--nk-azure-soft); }
input[readonly], input[disabled], textarea[readonly] { background: var(--nk-cream-2); color: var(--nk-muted); }
textarea { resize: vertical; min-height: 120px; }
.nk-check { display: flex; gap: 9px; align-items: flex-start; font-size: 14px; color: var(--nk-ink-soft); }
.nk-check input { width: auto; margin-top: 3px; }

/* ---- narrow (auth) pages ---------------------------------------- */
.nk-narrow { max-width: 460px; margin: 56px auto; padding: 0 20px; }
.nk-narrow.nk-narrow-wide { max-width: 780px; }   /* long-form: legal, help */
.nk-narrow .nk-card { padding: 30px 28px; }
.nk-narrow-head { text-align: center; margin-bottom: 22px; }
.nk-narrow-head .nk-logo { justify-content: center; }

/* ---- responsive -------------------------------------------------- */
@media (max-width: 860px) {
  .nk-shell, .nk-shell.is-collapsed { grid-template-columns: 1fr; }
  .nk-side { position: static; height: auto; flex-direction: column; }
  .nk-page { padding: 22px 18px 48px; }
  .nk-topbar { padding: 14px 18px; }
}

/* PUBUX1-ST2-20260826-MARKER: T5 close fix -- the account-shell collapse now
   FULLY closes (0 column, sidebar hidden) instead of the half-open 64px icon
   rail [T] flagged as looking defective. The earlier .is-collapsed icon-rail
   rules above are superseded by display:none (kept in place: additive law;
   --nk-sidebar-w-collapsed is now unused, noted in the build doc).
   .nk-reopen floats only while collapsed (sibling selector off #nk-shell).
   Under 860px the shell is a stacked single column: the sidebar stays visible
   and the floating control hides (collapse is a desktop affordance). */
.nk-shell.is-collapsed { grid-template-columns: 0 1fr; }
.is-collapsed .nk-side { display: none; }
.nk-reopen { display: none; position: fixed; top: 14px; left: 14px; z-index: 40;
  width: 34px; height: 34px; border: 1px solid var(--nk-border);
  background: var(--nk-white); color: var(--nk-muted); border-radius: var(--nk-radius-sm);
  cursor: pointer; font-size: 16px; align-items: center; justify-content: center; }
.nk-reopen:hover { background: var(--nk-azure-soft); color: var(--nk-azure-deep); }
.nk-shell.is-collapsed ~ .nk-reopen { display: flex; }
@media (max-width: 860px) {
  .is-collapsed .nk-side { display: flex; }
  .nk-reopen { display: none !important; }
}

/* COPY-ST4-20260831-MARKER: generate-only append -- LAND ST4 already styled
   .nk-pw-eye in this sheet; .nk-pw-generate had no rule anywhere. */
.nk-pw-generate { display:inline-block; margin-top:6px; padding:6px 12px; font-size:13px;
  font-weight:600; color: var(--nk-azure-deep, #1b4e75); background: transparent;
  border: 1px solid var(--nk-border, #e8e5de); border-radius: 6px; cursor: pointer; }
.nk-pw-generate:hover { background: var(--nk-cream-2, #f4f2ee); text-decoration: none; }