/* =========================================================
   Zeal Portal — Ribbon
   The top chrome, copy-pasted identically on every page.

   Structure (see scripts/_ribbon.html in PR D+E):

     <header class="ribbon">
       <a class="ribbon__mark">…logo + "internal" marker…</a>
       <nav class="ribbon__breadcrumb">…</nav>
       <div class="ribbon__right">
         <kbd class="ribbon__palette-hint">⌘K</kbd>
         <button class="ribbon__menu" id="menuOpen">menu</button>
         <button class="ribbon__avatar" data-avatar>…</button>
       </div>
     </header>

   Tier variations (ribbon on orange, black, or paper) live inside the
   tier CSS files (tier-full-brand.css etc.), not here. This file defines
   the default — paper background, ink text — which Tier 2 and Tier 3
   pages use as-is.

   Loaded after colors_and_type.css; no dependencies of its own.

   Phase 1 note: this file is not yet referenced by any page. PR D+E
   lands the ribbon markup across all pages and starts loading this file.
   ========================================================= */

.ribbon {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-5) var(--s-7);
  background: var(--paper, #fff);
  color: var(--ink, #000);
  border-bottom: 1px solid var(--rule, rgba(0, 0, 0, 0.08));
}

/* --- Spark + "portal" wordmark --- */

.ribbon__mark {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-ex);
  font-weight: var(--w-bold);
  font-size: 18px;
  letter-spacing: -0.02em;
  color: inherit;
  text-decoration: none;
  text-transform: lowercase;
}
.ribbon__mark:hover { color: inherit; }

.ribbon__mark img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

/* (legacy .ribbon__mark small used by "zeal · internal" variant —
   retained as a no-op in case future variants want a secondary label) */
.ribbon__mark small {
  font-family: var(--font-cd);
  font-weight: var(--w-medium);
  font-size: var(--t-micro);
  letter-spacing: var(--track-wide);
  text-transform: none;
  opacity: 0.65;
  padding-left: var(--s-3);
  border-left: 1px solid var(--rule-2, rgba(0, 0, 0, 0.14));
  margin-left: var(--s-1);
}

/* --- Breadcrumb (populated by JS from the current path) --- */

.ribbon__breadcrumb {
  font-family: var(--font-cd);
  font-weight: var(--w-medium);
  font-size: var(--t-small);
  letter-spacing: 0.04em;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ribbon__breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-std);
}
.ribbon__breadcrumb a:hover { color: var(--ink, #000); }
.ribbon__breadcrumb .sep { opacity: 0.4; }

/* --- Right cluster: ⌘K hint, menu button, avatar --- */

.ribbon__right {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.ribbon__palette-hint {
  font-family: var(--font-cd);
  font-weight: var(--w-medium);
  font-size: var(--t-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  background: transparent;
  border: 1px solid var(--rule-2, rgba(0, 0, 0, 0.14));
  border-radius: var(--r-2);
  padding: 4px 8px;
  cursor: pointer;
  transition:
    color var(--dur-fast) var(--ease-std),
    border-color var(--dur-fast) var(--ease-std);
}
.ribbon__palette-hint:hover {
  color: var(--ink, #000);
  border-color: var(--ink-3);
}
@media (max-width: 720px) {
  .ribbon__palette-hint { display: none; }
}

.ribbon__menu {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: transparent;
  color: var(--ink, #000);
  border: 1px solid var(--rule-3, rgba(0, 0, 0, 0.22));
  padding: 8px 14px 8px 16px;
  border-radius: var(--r-pill);
  font-family: var(--font-std);
  font-weight: var(--w-medium);
  font-size: 14px;
  letter-spacing: var(--track-body);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-std),
    color var(--dur-fast) var(--ease-std),
    border-color var(--dur-fast) var(--ease-std);
}
.ribbon__menu:hover {
  background: var(--ink, #000);
  color: var(--paper, #fff);
  border-color: var(--ink, #000);
}

.ribbon__menu-icon {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}
.ribbon__menu-icon span {
  width: 14px;
  height: 1.5px;
  background: currentColor;
  display: block;
}

.ribbon__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--warm, #f2ede2);
  color: var(--ink, #000);
  border: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-ex);
  font-weight: var(--w-bold);
  font-size: 14px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-std),
    color var(--dur-fast) var(--ease-std);
}
.ribbon__avatar:hover {
  background: var(--ink, #000);
  color: var(--paper, #fff);
}

/* --- Mobile (single-column, tighter spacing) --- */

@media (max-width: 720px) {
  .ribbon {
    padding: var(--s-4) var(--s-5);
    gap: var(--s-4);
  }
  .ribbon__breadcrumb { display: none; }
  .ribbon__menu { padding: 6px 12px; }
}