/* Portfolio bridge for the Knowledge Library.
   The learning surfaces keep their original topic themes; this file only
   unifies the site identity, navigation, and footer around them. */

:root {
  --portfolio-navy: #07121f;
  --portfolio-navy-soft: #0b1a2b;
  --portfolio-gold: #caaa61;
  --portfolio-gold-light: #efd99f;
  --portfolio-shell-line: rgba(202, 170, 97, 0.24);
  --portfolio-shell-muted: #aeb9c3;
  --topbar-h: 72px;
}

.portfolio-library-brand,
.portfolio-menu summary,
.portfolio-menu-panel a,
.portfolio-footer a {
  -webkit-tap-highlight-color: transparent;
}

.portfolio-library-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 13px;
  min-width: max-content;
  color: var(--text);
  text-decoration: none;
}

.portfolio-library-brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.portfolio-library-brand span {
  display: grid;
  row-gap: 5px;
  line-height: 1.18;
}

.portfolio-library-brand strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.portfolio-library-brand small {
  color: #94620b;
  font-family: var(--f-mono);
  font-size: 0.64rem;
  font-weight: 650;
  letter-spacing: 0.06em;
}

[data-theme="dark"] .portfolio-library-brand strong { color: #f4f1ea; }
[data-theme="dark"] .portfolio-library-brand small { color: #e4cb89; }

.portfolio-shell-rule {
  width: 1px;
  height: 30px;
  flex: 0 0 auto;
  background: var(--border);
}

.hub-header-inner {
  width: min(100% - 2rem, 1180px);
  max-width: none;
  min-height: 72px;
  padding: 0;
}

.hub-header .hub-brand {
  min-width: max-content;
  padding: 0.42rem 0.68rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}

.hub-header .hub-brand .brand-mark {
  background: var(--portfolio-navy);
  color: var(--portfolio-gold-light);
  border-color: var(--portfolio-shell-line);
}

.hub-header-tools { gap: 0.35rem; }

.portfolio-menu {
  position: relative;
  flex: 0 0 auto;
}

.portfolio-menu summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42rem;
  min-height: 34px;
  padding: 0 0.72rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 0.78rem;
  font-weight: 650;
  cursor: pointer;
  list-style: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.portfolio-menu summary::-webkit-details-marker { display: none; }
.portfolio-menu summary:hover,
.portfolio-menu[open] summary {
  color: #8a681f;
  border-color: rgba(202, 170, 97, 0.62);
  background: color-mix(in srgb, var(--portfolio-gold) 9%, var(--surface));
}

[data-theme="dark"] .portfolio-menu summary:hover,
[data-theme="dark"] .portfolio-menu[open] summary { color: var(--portfolio-gold-light); }

.portfolio-menu summary svg {
  width: 13px;
  height: 13px;
  transition: transform 160ms ease;
}

.portfolio-menu[open] summary svg { transform: rotate(180deg); }

.portfolio-menu-panel {
  position: absolute;
  top: calc(100% + 0.62rem);
  right: 0;
  z-index: 120;
  width: 220px;
  display: grid;
  gap: 0.22rem;
  padding: 0.56rem;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-3);
}

.portfolio-menu-panel::before {
  content: "Portfolio";
  padding: 0.36rem 0.56rem 0.44rem;
  border-bottom: 1px solid var(--border);
  color: #8a681f;
  font-family: var(--f-mono);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

[data-theme="dark"] .portfolio-menu-panel::before { color: var(--portfolio-gold-light); }

.portfolio-menu-panel a {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 0.38rem 0.56rem;
  border-radius: 8px;
  color: var(--text-2);
  font-size: 0.8rem;
  font-weight: 570;
  text-decoration: none;
}

.portfolio-menu-panel a:hover,
.portfolio-menu-panel a[aria-current="page"] {
  color: #775816;
  background: color-mix(in srgb, var(--portfolio-gold) 11%, var(--surface));
}

[data-theme="dark"] .portfolio-menu-panel a:hover,
[data-theme="dark"] .portfolio-menu-panel a[aria-current="page"] { color: var(--portfolio-gold-light); }

.shell-social-link {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 34px;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-2);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, color 160ms ease;
}

.shell-social-link:hover {
  transform: translateY(-1px);
  border-color: rgba(202, 170, 97, 0.65);
}

.shell-social-link.github { color: #181717; }
.shell-social-link.linkedin { color: #0a66c2; }
.shell-topmate-stack { position: relative; width: 18px; height: 18px; display: block; }
.shell-topmate-stack img { position: absolute; inset: 0; width: 18px; height: 18px; object-fit: contain; }
.shell-topmate-dark { display: none; }

[data-theme="dark"] .shell-social-link { color: #d8dee4; }
[data-theme="dark"] .shell-social-link.github,
[data-theme="dark"] .shell-social-link.linkedin { color: #d8dee4; }
[data-theme="dark"] .shell-topmate-light { display: none; }
[data-theme="dark"] .shell-topmate-dark { display: block; }

.topbar {
  gap: 0.72rem;
  padding-inline: clamp(0.75rem, 1.7vw, 1.35rem);
}

.topbar .portfolio-library-brand { margin-right: 0.15rem; }
.topbar .portfolio-library-brand img { width: 32px; height: 32px; }
.topbar-left { gap: 0.48rem; }
.topbar-right { gap: 0.36rem; }
.topbar .search-trigger { width: clamp(10.5rem, 16vw, 15.5rem); }
.topbar .guide-switch-btn { max-width: 250px; }

.portfolio-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(202, 170, 97, 0.2);
  background:
    radial-gradient(circle at 12% 10%, rgba(202, 170, 97, 0.08), transparent 25%),
    #050d17;
  color: #aeb9c3;
}

.portfolio-footer-inner {
  width: min(100% - 2rem, 1180px);
  margin: 0 auto;
}

.portfolio-footer-main {
  display: grid;
  grid-template-columns: minmax(280px, 1.45fr) 0.7fr 0.7fr;
  gap: clamp(2rem, 6vw, 4.5rem);
  padding: 3.2rem 0 2.5rem;
}

.portfolio-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.82rem;
  color: #f2eee5;
  text-decoration: none;
}

.portfolio-footer-brand img { width: 38px; height: 38px; object-fit: contain; }
.portfolio-footer-brand span { display: grid; row-gap: 0.28rem; line-height: 1.15; }
.portfolio-footer .portfolio-footer-brand strong {
  color: #f2eee5 !important;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  font-weight: 500;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.24);
}
.portfolio-footer-brand small { color: #e4cb89; font-family: var(--f-mono); font-size: 0.64rem; letter-spacing: 0.055em; }

.portfolio-footer-statement {
  display: grid;
  gap: 0.1rem;
  max-width: 430px;
  margin: 1.35rem 0 0;
  color: #aeb9c3;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.6;
}

.portfolio-footer-statement em { color: var(--portfolio-gold-light); font-weight: 400; }
.portfolio-footer-nav { display: flex; flex-direction: column; align-items: flex-start; gap: 0.58rem; }
.portfolio-footer-nav > p { margin: 0 0 0.35rem; color: var(--portfolio-gold); font-family: var(--f-mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.portfolio-footer-nav a { display: inline-flex; align-items: center; gap: 0.5rem; color: #aeb9c3; font-size: 0.82rem; text-decoration: none; transition: color 160ms ease, transform 160ms ease; }
.portfolio-footer-nav a > svg { width: 15px; height: 15px; color: currentColor; }
.portfolio-footer-nav .shell-topmate-stack,
.portfolio-footer-nav .shell-topmate-stack img { width: 16px; height: 16px; }
.portfolio-footer-nav a:hover { color: var(--portfolio-gold-light); transform: translateX(3px); }

.portfolio-footer-bottom {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid rgba(202, 170, 97, 0.16);
  color: #8795a2;
  font-size: 0.74rem;
}

.portfolio-footer-bottom a { color: #e4cb89; text-decoration: none; }

body:not(.hub) .portfolio-footer { margin-left: var(--nav-w); }
body:has(.app[data-collapsed="true"]) .portfolio-footer { margin-left: 48px; }

@media (max-width: 1180px) {
  .portfolio-library-brand span { display: none; }
  .portfolio-shell-rule { display: none; }
  .topbar .guide-switch-btn { max-width: 210px; }
}

@media (max-width: 1100px) {
  .topbar-right .shell-social-link { display: none; }
  .topbar .guide-switch-btn { max-width: 190px; }
}

@media (max-width: 900px) {
  :root { --topbar-h: 62px; }
  .hub-header-inner { min-height: 62px; }
  .hub-header .portfolio-library-brand span { display: grid; }
  .hub-header .portfolio-library-brand small { display: none; }
  .topbar .portfolio-library-brand { display: none; }
  .topbar .portfolio-menu { display: none; }
  .topbar-right .shell-social-link { display: none; }
  body:not(.hub) .portfolio-footer,
  body:has(.app[data-collapsed="true"]) .portfolio-footer { margin-left: 0; }
  .portfolio-footer-main { grid-template-columns: 1fr 1fr; }
  .portfolio-footer-identity { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .hub-header-inner { width: min(100% - 1.25rem, 1180px); gap: 0.42rem; }
  .hub-header .portfolio-library-brand span { display: none; }
  .hub-header .hub-brand { padding: 0.35rem 0.52rem; }
  .hub-header .hub-brand-text { font-size: 0.88rem; }
  .hub-header .portfolio-menu { display: none; }
  .hub-header-tools .shell-social-link { display: none; }
  .portfolio-footer-main { grid-template-columns: 1fr; gap: 2rem; padding-block: 2.6rem 2rem; }
  .portfolio-footer-identity { grid-column: auto; }
  .portfolio-footer-bottom { min-height: 82px; align-items: flex-start; justify-content: center; flex-direction: column; gap: 0.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  .portfolio-menu summary svg,
  .portfolio-footer-nav a,
  .shell-social-link { transition: none; }
}