.app-header {
  position: sticky;
  z-index: var(--z-header);
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: rgba(14, 31, 47, 0.88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  align-items: center;
  width: min(100%, var(--content-width));
  min-height: var(--header-height);
  padding: 0 var(--page-gutter);
  margin: 0 auto;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: var(--target-min);
  gap: var(--space-3);
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(3, 0.28rem);
  align-items: end;
  width: 1.4rem;
  height: 1.65rem;
  gap: 0.16rem;
}

.brand-mark i {
  display: block;
  border-radius: var(--radius-pill);
  background: var(--color-action-bright);
}

.brand-mark i:nth-child(1) { height: 55%; }
.brand-mark i:nth-child(2) { height: 100%; background: var(--color-brand-accent); }
.brand-mark i:nth-child(3) { height: 75%; }

.brand-copy {
  display: grid;
  line-height: 1;
}

.brand-copy strong {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.brand-copy em {
  color: var(--color-action-bright);
  font-style: normal;
}

.brand-copy small {
  margin-top: 0.28rem;
  color: var(--color-text-muted);
  font-size: 0.58rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  margin-right: auto;
  gap: var(--space-1);
}

.desktop-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: color var(--motion-fast), background var(--motion-fast);
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  background: rgba(39, 66, 93, 0.62);
  color: var(--color-text);
}

.desktop-nav a[aria-current="page"]::after {
  position: absolute;
  right: 0.75rem;
  bottom: 0.3rem;
  left: 0.75rem;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-action-bright);
  content: "";
}

.header-actions {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: var(--space-2);
}

.compact-search {
  display: flex;
  align-items: center;
  width: clamp(11rem, 17vw, 16rem);
  min-height: 2.75rem;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgba(21, 44, 64, 0.72);
  gap: var(--space-2);
  transition: border-color var(--motion-fast), background var(--motion-fast);
}

.compact-search:focus-within {
  border-color: var(--color-focus);
  background: var(--color-surface);
}

.compact-search input {
  min-width: 0;
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-text);
  font-size: var(--text-sm);
}

.compact-search input::placeholder {
  color: rgba(193, 209, 207, 0.62);
}

.button,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 700;
  gap: var(--space-2);
  transition: transform var(--motion-base) var(--ease-hover), background var(--motion-base), border-color var(--motion-base), color var(--motion-base);
}

.button {
  padding: 0 var(--space-5);
}

.button:active,
.icon-button:active {
  transition-duration: var(--motion-pressed);
  transform: scale(0.98);
}

.button-primary {
  background: var(--color-action);
  color: var(--color-text);
}

.button-primary:hover { background: var(--color-action-bright); }

.button-accent {
  background: var(--color-brand-accent);
  color: #fff;
  font-size: 1.1875rem;
}

.button-accent:hover { background: #d97439; }

.button-secondary {
  border-color: var(--color-border-strong);
  background: rgba(39, 66, 93, 0.76);
  color: var(--color-text);
}

.button-secondary:hover { background: var(--color-surface-elevated); }

.icon-button {
  min-width: 2.75rem;
  padding: 0 var(--space-3);
  border-color: var(--color-border);
  background: rgba(21, 44, 64, 0.72);
}

.language-trigger span {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
}

.menu-wrap {
  position: relative;
}

.popover {
  position: absolute;
  z-index: var(--z-popover);
  top: calc(100% + var(--space-3));
  right: 0;
  width: min(20rem, calc(100vw - 2rem));
  padding: var(--space-2);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-popover);
}

.popover-heading {
  display: grid;
  padding: var(--space-3) var(--space-3) var(--space-4);
  gap: var(--space-1);
}

.popover-heading span {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.popover button,
.popover a {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 2.75rem;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  gap: var(--space-3);
  text-align: left;
}

.popover button:hover,
.popover a:hover,
.popover button[aria-pressed="true"] {
  background: rgba(14, 31, 47, 0.55);
}

.popover button small {
  margin-left: auto;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.popover button[aria-pressed="true"]::after {
  width: 0.5rem;
  height: 0.5rem;
  margin-left: var(--space-2);
  border-radius: 50%;
  background: var(--color-action-bright);
  content: "";
}

.mobile-more-wrap,
.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(19rem, 0.72fr);
  align-items: center;
  width: min(100%, var(--content-width));
  min-height: clamp(34rem, 72vh, 42rem);
  padding: clamp(4rem, 9vw, 8rem) var(--page-gutter);
  margin: 0 auto;
  overflow: hidden;
  gap: clamp(2rem, 7vw, 7rem);
}

.hero::after {
  position: absolute;
  right: 9%;
  bottom: 6%;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  background: rgba(13, 138, 158, 0.08);
  filter: blur(55px);
  content: "";
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  pointer-events: none;
  background-image: linear-gradient(var(--color-border) 1px, transparent 1px), linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 4rem 4rem;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

.hero-grid span {
  position: absolute;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--color-action-bright);
}

.hero-grid span:nth-child(1) { top: 18%; left: 12%; }
.hero-grid span:nth-child(2) { top: 34%; left: 44%; }
.hero-grid span:nth-child(3) { top: 66%; left: 32%; }
.hero-grid span:nth-child(4) { top: 22%; right: 22%; }
.hero-grid span:nth-child(5) { right: 12%; bottom: 23%; }
.hero-grid span:nth-child(6) { right: 42%; bottom: 13%; }

.hero-content {
  position: relative;
  z-index: var(--z-content);
  max-width: 49rem;
}

.eyebrow {
  margin-bottom: var(--space-4);
  color: var(--color-action-bright);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-8);
  border: 1px solid rgba(90, 208, 225, 0.28);
  border-radius: var(--radius-pill);
  background: rgba(35, 113, 123, 0.18);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  gap: var(--space-2);
}

.status-pill > span:first-child {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0.22rem rgba(118, 199, 174, 0.13);
}

.hero h1 {
  max-width: 16ch;
  margin-bottom: var(--space-6);
  font-size: var(--text-hero);
}

.hero-body {
  max-width: 42rem;
  margin-bottom: var(--space-8);
  font-size: var(--text-md);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero-lab-card {
  position: relative;
  z-index: var(--z-raised);
  width: min(100%, 24rem);
  aspect-ratio: 4 / 5;
  justify-self: end;
  padding: var(--space-6);
  overflow: hidden;
  border: 1px solid rgba(90, 208, 225, 0.3);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(39, 66, 93, 0.94), rgba(21, 44, 64, 0.98)),
    var(--color-surface);
  box-shadow: var(--shadow-soft);
  transform: rotate(2.5deg);
}

.hero-lab-card::before {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 2.75rem, rgba(193, 209, 207, 0.045) 2.75rem calc(2.75rem + 1px));
  content: "";
}

.lab-card-top,
.lab-card-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
}

.lab-card-core {
  position: relative;
  display: grid;
  place-items: center;
  height: 72%;
}

.core-ring {
  width: 11rem;
  height: 11rem;
  border: 1px solid var(--color-action-bright);
  border-radius: 50%;
  box-shadow: inset 0 0 0 2.4rem rgba(13, 138, 158, 0.06), 0 0 3rem rgba(13, 138, 158, 0.17);
}

.core-ring::before,
.core-ring::after {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(193, 209, 207, 0.23);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.core-ring::before { width: 15rem; height: 15rem; }
.core-ring::after { width: 7rem; height: 7rem; }

.core-dot {
  position: absolute;
  width: 1.35rem;
  height: 1.35rem;
  border: 0.35rem solid rgba(247, 235, 221, 0.2);
  border-radius: 50%;
  background: var(--color-brand-accent);
}

.lab-card-lines {
  position: absolute;
  right: var(--space-6);
  bottom: 4.7rem;
  left: var(--space-6);
  display: grid;
  gap: var(--space-2);
}

.lab-card-lines i {
  height: 1px;
  background: linear-gradient(90deg, var(--color-action-bright), transparent);
}

.lab-card-lines i:nth-child(2) { width: 78%; }
.lab-card-lines i:nth-child(3) { width: 48%; }

.content-section,
.standard-view {
  width: min(100%, var(--content-width));
  padding-right: var(--page-gutter);
  padding-left: var(--page-gutter);
  margin-right: auto;
  margin-left: auto;
}

.intro-section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-20);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: end;
  gap: var(--space-12);
  margin-bottom: var(--space-10);
}

.section-heading h2 {
  max-width: 19ch;
  margin-bottom: 0;
  font-size: var(--text-xl);
}

.section-heading > p {
  max-width: 43rem;
  margin-bottom: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.feature-card {
  position: relative;
  min-height: 19rem;
  padding: var(--space-8);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.feature-card::after {
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 10rem;
  height: 10rem;
  border: 1px solid rgba(13, 138, 158, 0.2);
  border-radius: 50%;
  content: "";
}

.feature-card > svg {
  width: 2rem;
  height: 2rem;
  margin: var(--space-10) 0 var(--space-6);
  color: var(--color-action-bright);
}

.feature-index {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.feature-card p { margin-bottom: 0; }

.feature-card-warm {
  background: var(--color-warm);
  color: var(--color-canvas);
}

.feature-card-warm p,
.feature-card-warm .feature-index { color: #3c5367; }
.feature-card-warm > svg { color: var(--color-brand-accent); }

.standard-view {
  min-height: calc(100dvh - var(--header-height) - 10rem);
  padding-top: clamp(3.5rem, 8vw, 7rem);
  padding-bottom: var(--space-20);
}

.page-heading {
  max-width: 52rem;
  margin-bottom: var(--space-12);
}

.page-heading h1 {
  margin-bottom: var(--space-4);
  font-size: clamp(2.5rem, 5vw, 4.6rem);
}

.page-heading > p:last-child {
  max-width: 42rem;
  font-size: var(--text-md);
}

.empty-state {
  display: grid;
  place-items: center;
  max-width: 46rem;
  min-height: 24rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(21, 44, 64, 0.86), rgba(21, 44, 64, 0.4));
  text-align: center;
}

.empty-visual {
  display: grid;
  place-items: center;
  width: 5rem;
  height: 5rem;
  margin-bottom: var(--space-6);
  border: 1px solid rgba(90, 208, 225, 0.3);
  border-radius: var(--radius-lg);
  background: rgba(35, 113, 123, 0.16);
  color: var(--color-action-bright);
  transform: rotate(-3deg);
}

.empty-visual svg { width: 2.1rem; height: 2.1rem; }

.empty-state h2 {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
}

.empty-state p {
  max-width: 35rem;
  margin-bottom: var(--space-6);
}

.settings-grid {
  display: grid;
  max-width: 58rem;
  gap: var(--space-4);
}

.settings-card {
  display: grid;
  grid-template-columns: 3rem 1fr;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  gap: var(--space-5);
}

.settings-card > svg {
  width: 1.75rem;
  height: 1.75rem;
  margin-top: 0.15rem;
  color: var(--color-action-bright);
}

.settings-card h2 { margin-bottom: var(--space-2); font-size: var(--text-lg); }
.settings-card p { margin-bottom: var(--space-5); }
.settings-card.is-muted { opacity: 0.72; }

.segmented-control {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.segmented-control button {
  min-height: 2.75rem;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
}

.segmented-control button[aria-pressed="true"] {
  border-color: var(--color-action-bright);
  background: var(--color-action);
}

.legal-footer {
  padding: var(--space-8) var(--page-gutter) calc(var(--space-8) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.legal-footer p {
  margin: 0 auto;
  color: rgba(193, 209, 207, 0.72);
  font-size: var(--text-xs);
}

.legal-footer a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.toast {
  position: fixed;
  z-index: var(--z-toast);
  right: var(--space-6);
  bottom: var(--space-6);
  max-width: min(24rem, calc(100vw - 2rem));
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-popover);
  color: var(--color-text);
}

/* Phase 2 catalog and discovery */
.catalog-home {
  display: grid;
  gap: var(--space-12);
}

.catalog-row {
  min-width: 0;
}

.catalog-row__heading,
.results-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.catalog-row__heading h3,
.results-heading p {
  margin: 0;
}

.catalog-row__heading a {
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.catalog-row__heading a:hover {
  color: var(--color-action-bright);
}

.card-rail {
  display: grid;
  grid-auto-columns: minmax(17.5rem, 20rem);
  grid-auto-flow: column;
  gap: var(--space-4);
  padding: 0.2rem 0 var(--space-4);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: inline proximity;
  scrollbar-color: var(--color-surface-elevated) transparent;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
  gap: var(--space-5);
}

.resource-card {
  position: relative;
  display: grid;
  grid-template-rows: 8.5rem 1fr;
  min-width: 0;
  min-height: 25rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
  scroll-snap-align: start;
  transition: border-color var(--motion-base) var(--ease-standard), transform var(--motion-base) var(--ease-standard), box-shadow var(--motion-base) var(--ease-standard);
}

.resource-card:focus-within {
  z-index: var(--z-raised);
  border-color: rgba(90, 208, 225, 0.42);
  background: var(--color-surface-elevated);
}

.resource-card--compact {
  min-height: 23rem;
}

.resource-card__visual {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 28%, rgba(13, 138, 158, 0.42), transparent 30%),
    linear-gradient(135deg, rgba(35, 113, 123, 0.78), rgba(14, 31, 47, 0.9));
}

.resource-card__visual::before,
.resource-card__visual::after {
  position: absolute;
  width: 7rem;
  height: 7rem;
  border: 1px solid rgba(229, 249, 248, 0.16);
  border-radius: 50%;
  content: "";
}

.resource-card__visual::after {
  width: 10rem;
  height: 10rem;
}

.resource-card__visual[data-type="gpt"],
.resource-card__visual[data-type="gem"],
.resource-card__visual[data-type="agent"] {
  background: radial-gradient(circle at center, rgba(199, 101, 45, 0.35), transparent 28%), linear-gradient(145deg, #27425d, #152c40);
}

.resource-card__visual[data-type="link"] {
  background: radial-gradient(circle at 25% 35%, rgba(247, 235, 221, 0.18), transparent 25%), linear-gradient(145deg, #23717b, #0e1f2f);
}

.resource-card__visual[data-cover="orbit"] {
  background: radial-gradient(circle at 50% 50%, rgba(199, 101, 45, 0.5) 0 9%, transparent 10% 27%, rgba(13, 138, 158, 0.42) 28% 29%, transparent 30%), var(--color-surface-elevated);
}

.resource-card__visual[data-cover="grid"] {
  background-color: var(--color-surface-elevated);
  background-image: linear-gradient(rgba(229, 249, 248, 0.1) 1px, transparent 1px), linear-gradient(90deg, rgba(229, 249, 248, 0.1) 1px, transparent 1px);
  background-size: 1.5rem 1.5rem;
}

.resource-card__visual[data-cover="warm-note"] {
  background: linear-gradient(145deg, var(--color-warm), #ddc9b3);
  color: var(--color-canvas);
}

.resource-card__monogram {
  position: relative;
  z-index: 1;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 750;
}

.badge {
  display: inline-flex;
  min-height: 1.5rem;
  align-items: center;
  padding: 0 var(--space-2);
  border-radius: var(--radius-pill);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge--new {
  position: absolute;
  z-index: 2;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--color-brand-accent);
  color: var(--color-text);
}

.resource-card__body {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: var(--space-5);
}

.resource-card__meta {
  margin-bottom: var(--space-2);
  color: var(--color-action-bright);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.resource-card__title {
  margin-bottom: var(--space-3);
  font-size: var(--text-md);
}

.resource-card__summary {
  display: -webkit-box;
  margin-bottom: var(--space-4);
  overflow: hidden;
  font-size: var(--text-sm);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-flex;
  min-height: 1.6rem;
  align-items: center;
  padding: 0.15rem 0.55rem;
  border: 1px solid rgba(35, 113, 123, 0.7);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

.resource-card__link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--space-5);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 750;
}

.resource-card__link::after {
  padding-left: var(--space-2);
  color: var(--color-action-bright);
  content: "→";
}

.library-controls {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-8);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(21, 44, 64, 0.78);
}

.library-search input {
  width: 100%;
  min-height: 3.25rem;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
}

.library-search input:focus,
.filter-field select:focus {
  border-color: var(--color-focus);
}

.filter-disclosure summary {
  display: none;
  cursor: pointer;
  font-weight: 750;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
}

.filter-field {
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

.filter-field select {
  min-width: 0;
  min-height: 2.75rem;
  padding: 0 2.2rem 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-elevated);
}

.library-controls__footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
}

.library-controls__footer > .filter-field {
  width: min(15rem, 100%);
}

.view-toggle {
  display: inline-flex;
  padding: 0.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
}

.view-toggle button,
.button--quiet {
  min-height: var(--target-min);
  padding: 0 var(--space-3);
  border-radius: 0.35rem;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 750;
}

.view-toggle button[aria-pressed="true"] {
  background: var(--color-surface-elevated);
  color: var(--color-text);
}

.button--quiet:hover {
  color: var(--color-action-bright);
}

.resource-grid--list {
  grid-template-columns: 1fr;
}

.resource-grid--list .resource-card {
  grid-template-columns: 11rem minmax(0, 1fr);
  grid-template-rows: 1fr;
  min-height: 13rem;
}

.results-heading p {
  font-size: var(--text-sm);
}

.empty-state--results {
  grid-column: 1 / -1;
  min-height: 19rem;
}

.empty-state__icon {
  display: grid;
  width: 4rem;
  height: 4rem;
  place-items: center;
  margin: 0 auto var(--space-4);
  border-radius: 50%;
  background: var(--color-surface-elevated);
  color: var(--color-action-bright);
  font-size: 1.7rem;
}

.resource-view {
  max-width: 76rem;
}

.back-link {
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  margin-bottom: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.back-link:hover {
  color: var(--color-action-bright);
}

.resource-detail__header {
  max-width: 70rem;
}

.resource-detail__identity {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) minmax(0, 1fr);
  gap: var(--space-7);
  align-items: center;
}

.resource-detail__cover {
  width: 100%;
  margin: 0;
}

.resource-detail__header h1 {
  max-width: 19ch;
  margin-bottom: var(--space-4);
  font-size: clamp(2.25rem, 5vw, 4rem);
}

.resource-detail__meta {
  color: var(--color-action-bright);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.resource-detail__summary {
  max-width: 62ch;
  font-size: var(--text-md);
}

.resource-detail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-8) 0;
}

.resource-detail__layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(14rem, 0.7fr);
  gap: var(--space-5);
  align-items: start;
}

.resource-content,
.resource-sidebar {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.resource-content h2,
.resource-sidebar h2,
.related-section h2 {
  margin-bottom: var(--space-5);
  font-size: var(--text-lg);
}

.prompt-block {
  overflow-x: auto;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.resource-subheading {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  font-size: var(--text-md);
}

.resource-long-text {
  max-width: 72ch;
  white-space: pre-wrap;
}

.variable-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.related-section {
  margin-top: var(--space-12);
}

.resource-grid--related {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
}

.clipboard-fallback {
  position: fixed;
  left: -9999px;
  opacity: 0;
}

/* Phase 3 personal state */
.storage-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-width));
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) auto 0;
  border: 1px solid rgba(231, 166, 100, 0.55);
  border-radius: var(--radius-md);
  background: rgba(199, 101, 45, 0.16);
  gap: var(--space-4);
}

.storage-banner div {
  display: grid;
  gap: var(--space-1);
}

.storage-banner span {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.connection-banner,
.update-banner {
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-width));
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) auto 0;
  border: 1px solid rgba(90, 208, 225, 0.38);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.connection-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.connection-banner span,
.update-banner span,
.settings-help {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.update-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.update-banner > div:first-child {
  display: grid;
  gap: var(--space-1);
}

.update-banner__actions,
.settings-actions,
.settings-inline,
.backup-preview {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.settings-dynamic { display: contents; }
.settings-card--wide { grid-column: 1 / -1; }
.settings-card--no-icon { grid-template-columns: 1fr; }

.settings-card__body {
  display: grid;
  gap: var(--space-4);
}

.settings-card__body > h2,
.settings-card__body > p,
.backup-preview > p { margin: 0; }

.backup-preview {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
}

.button:disabled,
.icon-button:disabled,
.favorite-button:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.favorite-button {
  position: absolute;
  z-index: var(--z-content);
  top: var(--space-3);
  left: var(--space-3);
  display: grid;
  width: var(--target-min);
  height: var(--target-min);
  place-items: center;
  border: 1px solid rgba(229, 249, 248, 0.3);
  border-radius: var(--radius-pill);
  background: rgba(14, 31, 47, 0.86);
  color: var(--color-text);
  cursor: pointer;
  font-size: 1.15rem;
}

.favorite-button.is-active {
  border-color: rgba(247, 235, 221, 0.72);
  background: var(--color-brand-accent);
}

.favorite-filter {
  display: flex;
  min-height: var(--target-min);
  align-items: center;
  align-self: end;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-elevated);
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-sm);
  gap: var(--space-2);
}

.favorite-filter input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--color-action-bright);
}

.card-progress,
.detail-progress {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

.card-progress select,
.detail-progress select {
  min-height: var(--target-min);
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
}

.detail-progress {
  padding-top: var(--space-5);
  margin-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.note-editor {
  max-width: 100%;
  padding: var(--space-6);
  margin-top: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.note-editor__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.note-editor__heading h2 {
  margin: 0;
  font-size: var(--text-lg);
}

.note-editor__heading span {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.note-editor textarea {
  width: 100%;
  min-height: 9rem;
  padding: var(--space-4);
  resize: vertical;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-text);
  font: inherit;
}

.note-editor__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.collection-dashboard {
  display: grid;
  gap: var(--space-16);
}

.collection-section h2 {
  margin: 0;
  font-size: var(--text-lg);
}

.collection-count {
  display: inline-grid;
  min-width: 2rem;
  min-height: 2rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-surface-elevated);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.resource-grid--collection {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
}

/* Phase 4 authoring, covers, and collections */
.editor-heading {
  margin-bottom: var(--space-8);
}

.resource-editor-form {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(16rem, 0.72fr);
  align-items: start;
  gap: var(--space-5);
}

.editor-main {
  display: grid;
  gap: var(--space-5);
}

.editor-section,
.editor-aside {
  min-width: 0;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.editor-section {
  display: grid;
  margin: 0;
  gap: var(--space-4);
}

.editor-section legend,
.editor-aside h2 {
  padding: 0 var(--space-2);
  margin-bottom: var(--space-4);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
}

.editor-aside {
  position: sticky;
  top: calc(var(--header-height) + var(--space-5));
}

.editor-field {
  display: grid;
  min-width: 0;
  gap: var(--space-2);
}

.editor-field__label {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.editor-field input,
.editor-field textarea,
.editor-field select,
.collection-create-form input,
.collection-add-control select {
  width: 100%;
  min-height: var(--target-min);
  padding: var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  color: var(--color-text);
  font: inherit;
}

.editor-field textarea {
  resize: vertical;
}

.editor-field small,
.editor-language-note {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.editor-field [aria-invalid="true"] {
  border-color: var(--color-error);
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  grid-column: 1 / -1;
  justify-content: flex-end;
  padding: var(--space-5) 0;
  gap: var(--space-3);
}

.editor-error-summary {
  flex: 1 1 100%;
  margin: 0;
  color: var(--color-danger, #ffb6a1);
  font-size: var(--text-sm);
}

.cover-preview {
  position: relative;
  display: flex;
  aspect-ratio: 4 / 5;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  overflow: hidden;
  border: 1px solid rgba(90, 208, 225, 0.3);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--color-surface-elevated), var(--color-surface));
}

.cover-preview::before,
.cover-preview::after {
  position: absolute;
  width: 10rem;
  height: 10rem;
  border: 1px solid rgba(229, 249, 248, 0.16);
  border-radius: 50%;
  content: "";
}

.cover-preview::before { top: 22%; left: -22%; }
.cover-preview::after { right: -30%; bottom: 15%; }

.cover-preview__code,
.cover-preview__mark,
.cover-preview__title {
  position: relative;
  z-index: var(--z-raised);
}

.cover-preview__code,
.cover-preview__mark {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

.cover-preview__mark {
  align-self: center;
  color: var(--color-brand-accent);
  font-size: 2rem;
  font-weight: 800;
}

.cover-preview__title {
  max-width: 14ch;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
}

.cover-preview--orbit {
  background: radial-gradient(circle at 50% 45%, rgba(199, 101, 45, 0.58) 0 8%, transparent 9% 25%, rgba(13, 138, 158, 0.45) 26% 27%, transparent 28%), var(--color-surface-elevated);
}

.cover-preview--grid {
  background-color: var(--color-surface-elevated);
  background-image: linear-gradient(rgba(229, 249, 248, 0.09) 1px, transparent 1px), linear-gradient(90deg, rgba(229, 249, 248, 0.09) 1px, transparent 1px);
  background-size: 2rem 2rem;
}

.cover-preview--warm-note {
  background: linear-gradient(145deg, var(--color-warm), #ddc9b3);
  color: var(--color-canvas);
}

.cover-preview--warm-note .cover-preview__code { color: #3c5367; }

.collections-manager {
  display: grid;
  gap: var(--space-5);
}

.collection-create-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  max-width: 38rem;
  gap: var(--space-3);
}

.collection-list {
  display: grid;
  gap: var(--space-4);
}

.collection-panel {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.collection-panel > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.collection-panel h3 { margin: 0; }
.collection-panel header div { display: flex; gap: var(--space-2); }
.danger-action { color: var(--color-error); }

.resource-grid--collection-members {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
}

.collection-panel__empty {
  margin: 0;
}

.collection-remove-item {
  min-height: var(--target-min);
  padding: 0 var(--space-4);
  border-top: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 700;
}

.collection-add-control {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.collection-add-control select {
  min-width: 10rem;
}

@media (hover: hover) {
  .button:hover,
  .icon-button:hover {
    transform: translateY(-0.125rem);
  }

  .resource-card:hover {
    z-index: var(--z-raised);
    border-color: rgba(90, 208, 225, 0.42);
    background: var(--color-surface-elevated);
    transform: scale(1.02);
  }
}