/* Interface layer. Keep the Hebrew page and shelf typography in style.css. */
:root {
  --ui-font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --ui-surface: #fffefa;
  --ui-line: #e4e3dd;
  --ui-radius: 10px;
  --ui-ease: cubic-bezier(.2, .8, .2, 1);
}

body { -webkit-font-smoothing: antialiased; }
button, a, input, select, textarea, summary { -webkit-tap-highlight-color: transparent; }
:where(button, a, input, select, textarea, summary):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
:where(button, a, summary) { touch-action: manipulation; }

/* Quiet chrome around the books and the reading room. */
#app-header, .sh-top, #daf-actions, #picker, .sf-bar, .col-toggles,
.free-tier-badge, .multi-bar, #minimized-pill, .settings-box, .wn, .pf-main {
  font-family: var(--ui-font);
}
.sh-top { gap: 20px; padding-top: 24px; }
.sh-find { height: 42px; border-radius: var(--ui-radius); background: var(--ui-surface); }
.sh-find input { font-family: var(--ui-font); font-size: 14px; }
.sh-toplink, .sh-landing button.sh-toplink { font-family: var(--ui-font); font-size: 14px; }
.sh-toplink, .sh-gear, .header-profile { transition: color 140ms, background 140ms; }
.sh-gear, #settings-btn { min-width: 40px; min-height: 40px; border-radius: var(--ui-radius); }
#settings-btn { display: grid; place-items: center; }
#settings-btn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.sh-gear:hover { background: rgba(var(--accent-rgb), .06); }
.sh-intro { margin-top: 48px; margin-bottom: 32px; gap: 48px; }
.sh-lede { font-size: clamp(28px, 3vw, 42px); line-height: 1.16; max-width: 630px; }
.sh-lede span {
  display: block; margin-top: 16px;
  font: 400 16px/1.6 var(--ui-font); letter-spacing: 0;
}
.sh-demo { border-color: var(--ui-line); border-radius: 14px; box-shadow: 0 4px 16px #171a2106; }
.dm-kind { font: 500 11px/1.4 var(--ui-font); letter-spacing: .04em; }
.dm-answer { height: auto; min-height: 116px; }
.sh-h2 { font-size: 22px; letter-spacing: -.02em; }
.sh-card { border-radius: var(--ui-radius); box-shadow: none; }
.sh-card:hover { transform: translateY(-2px); box-shadow: 0 5px 16px #171a2108; border-color: #b7b9bf; }
.sh-card-kind, .sh-card-en, .sh-footer, .sh-more, .sh-save-snippet { font-family: var(--ui-font); }
.sh-card-kind { text-transform: none; letter-spacing: 0; font-size: 12px; color: var(--muted); }
.sh-card-en { font-size: 13px; }
.sh-footer { font-size: 12px; line-height: 1.7; }
.landing-account-sign-in, .account-sign-in { font-family: var(--ui-font); border-radius: var(--ui-radius); }

#app-header { gap: 16px; padding: 16px 28px; }
#picker select, #picker input, #load-btn, .amud-toggle, .view-switch,
.daf-nav-btn, .multi-toggle, .sf-pick select, .col-toggle {
  border-radius: 8px; min-height: 38px; font-family: var(--ui-font);
}
#picker select, #picker input { background: var(--ui-surface); }
.view-switch { padding: 3px; gap: 2px; background: #e9e9e4; border-color: transparent; }
.view-btn { border: 0; border-radius: 6px; font-family: var(--ui-font); }
.view-btn.active { background: var(--ui-surface); color: var(--accent); box-shadow: 0 1px 3px #171a2114; }
.daf-nav-btn { font-size: 13px; transition: background 140ms, color 140ms, border-color 140ms; }
.daf-logic-btn, .daf-iyun-btn,
.daf-logic-btn:hover, .daf-iyun-btn:hover {
  background: var(--ui-surface) !important; color: var(--ink-soft) !important;
  border-color: var(--rule) !important; font-weight: 500; filter: none;
}
.daf-logic-btn:hover, .daf-iyun-btn:hover { background: var(--hover) !important; }
.free-tier-badge { border-radius: var(--ui-radius); box-shadow: 0 2px 8px #171a2108; font-size: 12px; }

/* The explanation is a reading panel with a small, stable toolbar. */
:root { --xp-width: clamp(400px, 35vw, 540px); }
#modal.explain-panel { inset: 12px 12px 12px auto; }
#modal.explain-panel .modal-box {
  border: 1px solid var(--ui-line); border-radius: 16px;
  background: var(--ui-surface); box-shadow: 0 8px 32px #171a2114, 0 1px 4px #171a2108;
  animation-duration: 220ms; animation-timing-function: var(--ui-ease);
}
#modal.explain-panel .modal-header {
  flex-wrap: nowrap; align-items: center; gap: 8px;
  padding: 18px 16px 16px 22px; background: transparent; border-bottom: 1px solid var(--ui-line);
  flex-shrink: 0;
}
.xp-title { flex: 1; gap: 4px; padding: 0; }
#modal.explain-panel .modal-kind {
  font: 500 11px/1.4 var(--ui-font); letter-spacing: .03em;
  text-transform: none; color: var(--muted); background: none; padding: 0;
  border-radius: 0; animation: none; box-shadow: none;
}
#modal.explain-panel .modal-ref {
  font: 600 16px/1.4 var(--ui-font); letter-spacing: -.02em;
  white-space: normal; overflow-wrap: anywhere;
}
#modal.explain-panel .modal-header-actions { gap: 2px; }
#modal.explain-panel .xp-btn { width: 34px; height: 36px; border-radius: 8px; }
.xp-more { position: relative; }
.xp-more > summary { list-style: none; }
.xp-more > summary::-webkit-details-marker { display: none; }
.xp-more[open] > summary { background: var(--hover) !important; color: var(--ink) !important; }
.xp-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 10;
  width: 172px; padding: 5px; border: 1px solid var(--ui-line); border-radius: 10px;
  background: var(--ui-surface); box-shadow: 0 8px 24px #171a2120;
}
.xp-menu button {
  display: block; width: 100%; padding: 10px 12px; text-align: left;
  border: 0; border-radius: 6px; background: none; color: var(--ink-soft);
  font: 400 13px/1.4 var(--ui-font); cursor: pointer;
}
.xp-menu button:hover { background: var(--hover); }
.xp-menu button:disabled { opacity: .4; cursor: not-allowed; }
#modal.explain-panel .xp-styles {
  flex-wrap: nowrap; gap: 3px; margin: 14px 20px 0; padding: 3px;
  border-radius: 9px; background: #efefeb; overflow-x: auto;
  scrollbar-width: thin; flex-shrink: 0;
}
#modal.explain-panel .xp-style {
  flex: 1 0 auto; border: 0; border-radius: 6px; padding: 7px 8px;
  font: 400 12px/1.4 var(--ui-font); color: #555962; background: transparent;
}
#modal.explain-panel .xp-style[aria-checked="true"] {
  color: var(--accent); background: var(--ui-surface); box-shadow: 0 1px 3px #171a2114; font-weight: 600;
}
#modal.explain-panel .modal-source {
  margin: 16px 22px 0; padding: 12px 15px; border: 1px solid var(--ui-line);
  border-radius: 10px; background: #f6f6f1; max-height: min(20dvh, 150px); flex-shrink: 0;
  scrollbar-width: thin;
}
#modal.explain-panel .modal-source:empty { display: none; }
#modal.explain-panel .modal-body {
  padding: 22px; font: 400 15px/1.8 var(--ui-font); color: var(--ink-soft);
  mask-image: none; -webkit-mask-image: none; min-height: 0;
  scrollbar-width: thin; scrollbar-color: #c9cbd0 transparent; overscroll-behavior: contain;
}
#modal.explain-panel .modal-body h3 { font-size: 16px; margin-top: 22px; letter-spacing: -.01em; }
#modal.explain-panel .modal-body h3:first-child { margin-top: 0; }
#modal.explain-panel .modal-body h3::after { display: none; }
#modal.explain-panel .turn-user {
  color: var(--ink); background: #eeeff2; box-shadow: none;
  border-radius: 12px 12px 4px 12px; font-size: 14px; animation-duration: 180ms;
}
#modal.explain-panel .stream-status { font: 400 11px/1.5 var(--ui-font); letter-spacing: 0; padding: 3px 0; border: 0; background: none; }
#modal.explain-panel .stream-status-done { color: var(--muted); background: none; }
#modal.explain-panel .followup-form {
  margin: 0 14px 14px; padding: 6px; gap: 4px; border: 1px solid #d4d6db;
  border-radius: 12px; background: var(--ui-surface); transition: border-color 140ms, box-shadow 140ms;
}
#modal.explain-panel .followup-form:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--xp-accent-soft); }
#modal.explain-panel #followup-input {
  background: transparent; border: 0; border-radius: 6px; box-shadow: none; outline: none;
  padding: 10px; font: 400 14px/1.5 var(--ui-font); min-width: 0;
}
#modal.explain-panel #followup-send { width: 36px; height: 36px; border-radius: 8px; box-shadow: none; margin: 3px; }
.xp-waiting-label { font: 400 13px/1.5 var(--ui-font); }
.xp-context-note { font: 400 13px/1.6 var(--ui-font); color: var(--ink-soft); }
.xp-primary {
  padding: 10px 16px; border: 0; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: var(--on-accent); font: 500 14px/1.5 var(--ui-font);
}
.xp-primary:hover { background: var(--title); }
.xp-dots i { width: 4px; height: 4px; }
.xp-skeleton { gap: 12px; opacity: .65; }
.xp-progress { height: 2px; }
.xp-enter { animation-duration: 180ms; }

/* Settings and updates share the same field, button, and spacing scale. */
.settings-box { width: min(520px, calc(100vw - 32px)); border: 1px solid var(--ui-line); border-radius: 16px; }
.settings-box .modal-header { background: var(--ui-surface); padding: 18px 22px; }
#settings-title { margin: 0; color: var(--ink); font: 600 18px/1.4 var(--ui-font); }
.settings-body { padding: 22px; overflow-y: auto; overscroll-behavior: contain; }
.settings-label { font-size: 14px; color: var(--ink); }
.settings-help { font: 400 13px/1.65 var(--ui-font); }
.settings-body input { border-radius: 8px; }
.key-row button { border-radius: 8px; }
.key-sync { font-family: var(--ui-font); line-height: 1.5; }
.wn { border-radius: 16px; border-color: var(--ui-line); }
.wn-list li { padding: 16px 0; border-color: var(--ui-line); }
.wn-list h3 { font: 600 15px/1.4 var(--ui-font); }
.wn-list p { font: 400 13px/1.65 var(--ui-font); margin-top: 5px; }
.wn-ico { border-radius: 9px; color: var(--accent); background: var(--hover); stroke: currentColor; }
.wn-act, .wn-ok, .nm-later, .nm-fields input { font-family: var(--ui-font); border-radius: 8px; }
.wn-kicker { font-family: var(--ui-font); letter-spacing: .05em; }
.pf-card { border-radius: 12px; border-color: var(--ui-line); box-shadow: 0 2px 8px #171a2103; }
.pf-empty, .pf-meta, .pf-fine, .pf-note { line-height: 1.6; }

@media (min-width: 1200px) {
  #app-header, #app-main, #sefer-main { transition: margin-right 220ms var(--ui-ease); }
  body.xp-open #app-header, body.xp-open #app-main, body.xp-open #sefer-main { margin-right: calc(var(--xp-width) + 24px); }
  body.xp-open .free-tier-badge { right: calc(var(--xp-width) + 36px); }
}
@media (max-width: 1100px) {
  .sh-top { gap: 14px; flex-wrap: wrap; }
  .sh-find { width: min(290px, 100%); }
  .sh-intro { gap: 24px; }
  .sh-demo { width: 360px; }
}
@media (max-width: 900px) {
  #modal.explain-panel { inset: 0; }
  #modal.explain-panel .modal-box {
    inset: auto 0 0; border-radius: 18px 18px 0 0; border-bottom: 0;
    height: min(90vh, 90dvh); animation-duration: 220ms;
  }
  #modal.explain-panel .modal-header { padding-top: 22px; }
  #modal.explain-panel .modal-body { padding: 18px 20px; }
  #modal.explain-panel .modal-source { margin: 14px 20px 0; max-height: 16dvh; }
  #modal.explain-panel .followup-form { margin-bottom: max(12px, env(safe-area-inset-bottom)); }
  #modal.explain-panel #followup-input { font-size: 16px; }
  #modal.explain-panel .xp-btn { width: 38px; height: 40px; }
  #modal.explain-panel .xp-style { min-height: 36px; }
  .sh-intro { margin-top: 32px; }
}
@media (max-width: 600px) {
  #app-header { padding: 12px 16px; gap: 10px; }
  #picker { display: grid; grid-template-columns: minmax(0, 1fr) 56px auto auto; gap: 6px; }
  #picker .multi-toggle { grid-column: 1 / -1; justify-self: start; }
  #picker select { min-width: 0; flex: 1; }
  #picker input { width: 56px; }
  #picker select, #picker input, .sh-find input, .settings-body input { font-size: 16px; }
  #daf-actions { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  #daf-actions > .view-switch { width: 100%; }
  #daf-actions .daf-logic-btn { width: auto; }
  #daf-nav { margin-left: auto; }
  .daf-nav-btn { padding: 8px 10px; }
  .sh-top { gap: 10px 14px; padding-top: 18px; }
  .sh-top .sh-find { order: 5; width: 100%; }
  .sh-intro { display: block; margin-bottom: 22px; }
  .sh-lede { font-size: 30px; text-wrap: pretty; }
  .sh-lede span { margin-top: 12px; font-size: 14px; }
  .sh-demo { display: none; }
  #modal.explain-panel .modal-header { padding-left: 16px; padding-right: 10px; }
  #modal.explain-panel .modal-ref { font-size: 14px; }
  #modal.explain-panel .xp-styles { margin-left: 16px; margin-right: 16px; }
  .settings-body { padding: 18px; }
  .settings-box { max-height: 90dvh; }
}
/* Fast press feedback; a gentler release keeps repeated actions responsive. */
:is(button, .sh-card, .sh-toplink, .sh-spine, .header-profile, .xp-more > summary) {
  transition: scale 180ms var(--ui-ease), transform 180ms var(--ui-ease),
    background-color 160ms ease, color 160ms ease, border-color 160ms ease,
    box-shadow 180ms ease, opacity 160ms ease;
}
:is(button, .sh-card, .sh-toplink, .sh-spine, .header-profile, .xp-more > summary):not(:disabled):not([aria-disabled="true"]):active {
  scale: .97; transition-duration: 70ms;
}
#modal.explain-panel .xp-btn:not(:disabled):active { transform: none; scale: .94; }
.sh-card:active { transform: translateY(0); }
.sh-card:active, .sh-spine:active { scale: .985; }
#modal.explain-panel :is(.xp-style, .xp-btn), #followup-send, .daf-nav-btn, .view-btn {
  transition: scale 180ms var(--ui-ease), background-color 160ms ease,
    color 160ms ease, border-color 160ms ease, box-shadow 180ms ease;
}
#modal.explain-panel :is(.xp-style, .xp-btn):active, #followup-send:active,
.daf-nav-btn:active, .view-btn:active { transition-duration: 70ms; }
.xp-more[open] .xp-menu {
  transform-origin: top right; animation: uiMenuIn 150ms var(--ui-ease);
}
@keyframes uiMenuIn {
  from { opacity: 0; transform: translateY(-4px) scale(.98); }
  to { opacity: 1; transform: none; }
}
.settings-box { animation: uiDialogIn 200ms var(--ui-ease); }
@keyframes uiDialogIn {
  from { opacity: 0; transform: translateY(8px) scale(.985); }
  to { opacity: 1; transform: none; }
}
dialog.wn[open] { animation-duration: 200ms; }
dialog.wn[open]::backdrop { animation-duration: 180ms; }

/* Keep the surface rendered through its exit, without timers or delayed state.
   Older browsers retain the existing entry animations and instant dismissal. */
@supports (transition-behavior: allow-discrete) {
  #modal.explain-panel, #settings-modal {
    animation: none; opacity: 1;
    transition: opacity 220ms var(--ui-ease), display 220ms allow-discrete;
  }
  #modal.explain-panel .modal-box, #settings-modal .settings-box {
    animation: none; transform: none;
    transition: transform 220ms var(--ui-ease);
  }
  #modal.explain-panel .modal-backdrop { animation: none; }
  #modal.explain-panel.modal-hidden, #settings-modal.modal-hidden { opacity: 0; }
  #modal.explain-panel.modal-hidden .modal-box { transform: translateX(24px); }
  #settings-modal.modal-hidden .settings-box { transform: translateY(8px) scale(.985); }
  @starting-style {
    #modal.explain-panel, #settings-modal { opacity: 0; }
    #modal.explain-panel .modal-box { transform: translateX(24px); }
    #settings-modal .settings-box { transform: translateY(8px) scale(.985); }
  }
  @media (max-width: 900px) {
    #modal.explain-panel.modal-hidden .modal-box { transform: translateY(32px); }
    @starting-style {
      #modal.explain-panel .modal-box { transform: translateY(32px); }
    }
  }
}
@media (prefers-reduced-motion: reduce) {
  :is(button, .sh-card, .sh-toplink, .sh-spine, .header-profile, .xp-more > summary):active {
    scale: 1 !important;
  }
  #modal.explain-panel .modal-box, #settings-modal .settings-box { transform: none !important; }
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important; scroll-behavior: auto !important;
  }
}