/* Mokabook shell design language for the design mockups: tokens, the top
   bar, the catalogue navigation, the screen head band, and shared controls. */

:root {
  --chrome-bg: #f4f4f1;
  --chrome-surface: #ffffff;
  --chrome-ink: #1a1d1c;
  --chrome-ink-2: #4a4f4d;
  --chrome-muted: #7d8480;
  --chrome-border: #e3e5e0;
  --chrome-border-strong: #c8ccc4;
  --chrome-accent: #2a4733;
  --mbk-sage: #4f7864;
  --mbk-sage-deep: #2f5945;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color-scheme: light;
}

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

body {
  background: var(--chrome-bg);
  color: var(--chrome-ink);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.mbk-shell {
  background: var(--chrome-bg);
  color: var(--chrome-ink);
  font-family: var(--sans);
  font-size: 13px;
}

.mbk-shell--desktop {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.mbk-shell--mobile {
  border-left: 1px solid var(--chrome-border);
  border-right: 1px solid var(--chrome-border);
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  max-width: 392px;
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

.mbk-shell--collapsed {
  border-left: 1px solid var(--chrome-border);
  border-right: 1px solid var(--chrome-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  margin: 0 auto;
  max-width: 832px;
  overflow: hidden;
  position: relative;
}

/* ---- Top bar ---------------------------------------------------------- */

.mbk-topbar {
  align-items: center;
  background: var(--chrome-surface);
  border-bottom: 1px solid var(--chrome-border);
  display: flex;
  flex-shrink: 0;
  gap: 16px;
  height: 48px;
  padding: 0 16px;
}

.mbk-brand {
  align-items: center;
  display: flex;
  font-weight: 700;
  gap: 8px;
  letter-spacing: -0.01em;
}

.mbk-mark {
  background: var(--mbk-sage);
  border-radius: 6px;
  color: #fff;
  display: inline-grid;
  font-size: 13px;
  height: 24px;
  place-items: center;
  width: 24px;
}

.mbk-menu-btn {
  background: none;
  border: 1px solid var(--chrome-border);
  border-radius: 8px;
  color: var(--chrome-ink);
  cursor: pointer;
  font-size: 14px;
  height: 30px;
  line-height: 1;
  padding: 0 9px;
}

.mbk-search {
  align-items: center;
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  border-radius: 8px;
  color: var(--chrome-muted);
  display: flex;
  flex: 1;
  gap: 8px;
  height: 30px;
  max-width: 440px;
  padding: 0 12px;
}

.mbk-modes {
  background: var(--chrome-bg);
  border-radius: 8px;
  display: flex;
  gap: 4px;
  margin-left: auto;
  padding: 3px;
}

.mbk-mode {
  border-radius: 6px;
  color: var(--chrome-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
}

.mbk-mode.active {
  background: var(--chrome-surface);
  box-shadow: 0 1px 2px rgba(20, 28, 22, 0.08);
  color: var(--chrome-ink);
}

/* ---- Body split ------------------------------------------------------- */

.mbk-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

.mbk-main {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

.mbk-shell--mobile .mbk-main {
  flex: 1;
}

/* ---- Catalogue navigation --------------------------------------------- */

.mbk-nav {
  --mbk-guide: #dbded8;
  background: #fbfbfa;
  border-right: 1px solid var(--chrome-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  width: 248px;
}

.mbk-nav-head {
  align-items: center;
  color: var(--chrome-muted);
  display: flex;
  font-size: 11px;
  font-weight: 700;
  justify-content: space-between;
  letter-spacing: 0.08em;
  padding: 13px 14px 9px;
  text-transform: uppercase;
}

.mbk-nav-head span {
  color: var(--chrome-muted);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.mbk-nav-filter {
  align-self: flex-start;
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  border-radius: 8px;
  display: inline-flex;
  margin: 0 8px 8px;
  padding: 3px;
}

.mbk-nav-filter-opt {
  align-items: center;
  border-radius: 6px;
  color: var(--chrome-muted);
  display: flex;
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 11px;
}

.mbk-nav-filter-opt.active {
  background: var(--chrome-surface);
  box-shadow: 0 1px 2px rgba(20, 28, 22, 0.1);
  color: var(--chrome-ink);
}

.mbk-nav-filter-count {
  color: var(--chrome-muted);
  font-family: var(--mono);
  font-size: 10px;
  margin-left: 5px;
}

.mbk-nav-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 12px;
}

.mbk-nav-row {
  align-items: center;
  color: var(--chrome-ink-2);
  cursor: pointer;
  display: flex;
  font-size: 12.5px;
  gap: 7px;
  line-height: 1.3;
  padding: 5px 8px;
  position: relative;
  width: 100%;
  z-index: 0;
}

/* The selected highlight is an inset pill that starts at the row's indent
   (--mbk-indent) so the faint guide lines to its left stay visible. */
.mbk-nav-row::before {
  border-radius: 6px;
  bottom: 0;
  content: "";
  left: var(--mbk-indent, 0);
  position: absolute;
  right: 0;
  top: 0;
  z-index: -1;
}

.mbk-nav-row:hover::before {
  background: rgba(79, 120, 100, 0.1);
}

.mbk-nav-row.active {
  color: #fff;
  font-weight: 600;
}

.mbk-nav-row.active::before {
  background: var(--mbk-sage);
}

.mbk-nav-label {
  color: var(--chrome-ink);
  font-weight: 600;
}

.mbk-nav-row.active .mbk-nav-label {
  color: #fff;
}

.mbk-nav-ico {
  color: var(--chrome-muted);
  display: inline-grid;
  flex-shrink: 0;
  height: 15px;
  place-items: center;
  width: 15px;
}

.mbk-nav-ico.folder {
  color: var(--chrome-ink-2);
}

.mbk-nav-ico.flow {
  color: var(--mbk-sage);
}

.mbk-nav-row.active .mbk-nav-ico {
  color: rgba(255, 255, 255, 0.9);
}

.mbk-nav-count {
  color: var(--chrome-muted);
  font-family: var(--mono);
  font-size: 10.5px;
  margin-left: auto;
}

.mbk-nav-row.active .mbk-nav-count {
  color: rgba(255, 255, 255, 0.75);
}

/* Narrow-shell navigation drawer, shown open over a dimmed shell. */
.mbk-drawer {
  border-right: 1px solid var(--chrome-border);
  bottom: 0;
  box-shadow: 0 0 0 100vmax rgba(20, 28, 22, 0.45),
    0 18px 50px rgba(20, 28, 22, 0.3);
  left: 0;
  max-width: 280px;
  position: absolute;
  top: 0;
  width: 82%;
  z-index: 5;
}

/* ---- Screen head band ------------------------------------------------- */

.mbk-screen-head {
  align-items: flex-end;
  background: var(--chrome-surface);
  border-bottom: 1px solid var(--chrome-border);
  display: flex;
  flex-wrap: wrap;
  flex-shrink: 0;
  gap: 16px;
  justify-content: space-between;
  padding: 14px 24px 13px;
}

.mbk-screen-head > .mbk-seg {
  margin-left: auto;
}

.mbk-crumbs {
  color: var(--chrome-muted);
  font-size: 11.5px;
}

.mbk-crumbs .sep {
  margin: 0 6px;
  opacity: 0.55;
}

.mbk-title-row {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 5px;
}

.mbk-title-row h2 {
  font-size: 19px;
  letter-spacing: -0.01em;
  margin: 0;
}

.mbk-idchip {
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  border-radius: 6px;
  color: var(--chrome-muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  white-space: nowrap;
}

.mbk-idchip:active {
  background: var(--chrome-border);
  border-color: var(--chrome-border-strong);
  box-shadow: inset 0 1px 2px rgba(20, 28, 22, 0.14);
  color: var(--chrome-ink);
  transform: translateY(1px);
}

.mbk-shell--mobile .mbk-screen-head {
  padding: 12px 16px 11px;
}

.mbk-shell--mobile .mbk-screen-head > .mbk-seg {
  margin-left: 0;
  width: 100%;
}

.mbk-shell--mobile .mbk-screen-head > .mbk-seg span {
  flex: 1;
  text-align: center;
}

.mbk-shell--mobile .mbk-title-row h2 {
  font-size: 17px;
}

/* ---- Shared segmented control ----------------------------------------- */

.mbk-seg {
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  border-radius: 8px;
  display: inline-flex;
  padding: 3px;
}

.mbk-seg span {
  border-radius: 6px;
  color: var(--chrome-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  white-space: nowrap;
}

.mbk-seg span.active {
  background: var(--chrome-surface);
  box-shadow: 0 1px 2px rgba(20, 28, 22, 0.1);
  color: var(--chrome-ink);
}

/* ---- Home, missing-route, and empty states ---------------------------- */

.mbk-empty {
  align-items: center;
  color: var(--chrome-ink-2);
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
  padding: 40px;
  text-align: center;
}

.mbk-empty h2 {
  color: var(--chrome-ink);
  font-size: 19px;
  margin: 0;
}

.mbk-empty p {
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  max-width: 460px;
}

.mbk-empty code {
  font-family: var(--mono);
  font-size: 11.5px;
}

.mbk-empty-link {
  color: var(--mbk-sage);
  font-weight: 600;
  margin-top: 8px;
}