/* Summaverick workspace — motion tokens, responsive shell, research UI.
   Loaded after the page's base styles so layout/motion can evolve without
   rewriting the whole brand skin. */

:root {
  --motion-instant: 100ms;
  --motion-fast: 160ms;
  --motion-normal: 260ms;
  --motion-slow: 420ms;
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-enter: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-exit: cubic-bezier(0.4, 0, 1, 1);

  --answer-max-width: 860px;
  --chat-rail: clamp(240px, 20vw, 300px);
  --source-rail: clamp(260px, 18vw, 320px);
  --page-gutter: 16px;
  --composer-h: 132px;

  --bg-primary: var(--bg);
  --bg-secondary: var(--bg-2);
  --surface-hover: var(--surface-2);
  --text-primary: var(--text);
  --text-secondary: var(--text-muted);
  --accent: var(--link);
  --accent-soft: rgba(142, 197, 255, 0.14);
  --shadow: var(--shadow-lg);
}

html[data-theme="light"] {
  --accent-soft: rgba(37, 99, 235, 0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100svh;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background var(--motion-fast) var(--ease-standard),
    color var(--motion-fast) var(--ease-standard);
}

/* Quiet workspace light — visible only while researching */
.ambient {
  opacity: 0.55;
  transition: opacity var(--motion-slow) var(--ease-standard);
}
.ambient::before,
.ambient::after,
.ambient .orb {
  filter: none;
  opacity: 0.7;
}
body.loading-active .ambient { opacity: 0.85; }
body.input-focused .ambient { opacity: 0.7; }

.app-shell,
.shell {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  min-height: 100dvh;
  min-width: 0;
}

/* ── Header ── */
.app-header,
.topbar {
  padding-top: env(safe-area-inset-top);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.topbar-inner {
  width: min(calc(100% - 32px), 1440px);
  max-width: none;
  height: 56px;
  padding: 0;
}

.brand-logo {
  height: 32px;
  border-radius: 8px;
}

.brand-wordmark {
  display: none;
  font-size: 15px;
  font-weight: 620;
  letter-spacing: -0.02em;
}

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  border-radius: 12px;
}
.hamburger svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
}
.hamburger:focus-visible,
.icon-btn:focus-visible,
.new-btn:focus-visible,
.theme-btn:focus-visible,
.mode-pill:focus-visible,
.send:focus-visible,
.cite:focus-visible,
.starter:focus-visible,
.jump-latest:focus-visible,
.act-btn:focus-visible,
.src-chip:focus-visible,
.chat-item:focus-visible,
.cite-sheet-close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-btn,
.new-btn,
.icon-btn {
  min-width: 44px;
  min-height: 44px;
}

.theme-toggle { padding: 3px; }

/* ── Workspace grid ── */
.page {
  width: min(calc(100% - 32px), 1440px);
  max-width: none;
  padding: 0;
  min-width: 0;
}

.workspace {
  min-width: 0;
  width: 100%;
}

.workspace-main {
  min-width: 0;
  max-width: var(--answer-max-width);
  margin-inline: auto;
}

.landing {
  transition: opacity var(--motion-slow) var(--ease-standard),
    transform var(--motion-slow) var(--ease-enter);
  padding-bottom: 8px;
}

.app-active .landing {
  opacity: 0;
  transform: translateY(-8px);
  filter: none;
  pointer-events: none;
  height: 0;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

/* ── Hero ── */
.hero {
  padding: 36px 0 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  min-height: 0;
  grid-template-columns: none;
}

.hero-logo {
  height: 56px;
  margin-bottom: 16px;
  border-radius: 12px;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  max-width: 12ch;
}

.hero-sub {
  margin-top: 14px;
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  max-width: 38rem;
}

.hero-notes {
  margin-top: 18px;
  gap: 8px;
}

.hero-note {
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text-muted);
  background: transparent;
}

.trust-row {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--text-faint);
  letter-spacing: -0.01em;
}

.trust-item i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-faint);
  opacity: 0.7;
}

.hero-item {
  opacity: 0;
  transform: translateY(10px);
  animation: hero-enter 420ms var(--ease-enter) forwards;
}
.hero-item:nth-child(1) { animation-delay: 0ms; }
.hero-item:nth-child(2) { animation-delay: 70ms; }
.hero-item:nth-child(3) { animation-delay: 140ms; }
.hero-item:nth-child(4) { animation-delay: 210ms; }
.hero-item:nth-child(5) { animation-delay: 280ms; }

@keyframes hero-enter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Today becomes supporting, not a competing hero column */
.support-block {
  margin-top: 48px;
  padding-bottom: 12px;
}
.support-block .editorial {
  max-width: 720px;
}

/* ── Prompt suggestions ── */
.starter-wrap {
  padding: 22px 0 8px;
}

.starter-head {
  text-transform: none;
  letter-spacing: -0.01em;
  font-size: 13px;
  font-weight: 550;
  color: var(--text-muted);
}

.starter-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.starter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  min-height: 44px;
  border-radius: 999px;
  max-width: 100%;
}

.starter-kicker {
  margin: 0;
  font-size: 11px;
}

.starter > span:last-child {
  display: inline;
  font-size: 13px;
  color: var(--text-soft);
}

.starter span em { color: var(--text); }

/* ── Conversation ── */
.conversation {
  max-width: var(--answer-max-width);
  padding: 20px 0 calc(var(--composer-h) + 28px);
  min-width: 0;
}

.answer-content,
.content {
  min-width: 0;
  overflow-wrap: anywhere;
}

.content h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
}

.content pre,
.answer-content pre {
  max-width: 100%;
  overflow-x: auto;
  padding-top: 42px;
}

.content table,
.table-scroll {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.code-block {
  position: relative;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  overflow: hidden;
}

.code-block__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px 8px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faint);
}

.code-block pre {
  margin: 0;
  border: 0;
  border-radius: 0;
  padding-top: 14px;
}

.code-block .pre-copy,
.pre-copy {
  position: static;
  opacity: 1;
  min-height: 32px;
}

.content pre .pre-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  opacity: 1;
}

/* ── Composer ── */
.composer-wrap {
  padding: 12px 16px 12px;
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  background: var(--bottom-fade);
}

.composer-shell {
  max-width: var(--answer-max-width);
  padding-bottom: 0;
}

.composer {
  border-radius: 22px;
  padding: 10px 12px 12px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition:
    border-color var(--motion-fast) var(--ease-standard),
    transform var(--motion-fast) var(--ease-standard),
    box-shadow var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard);
}

.composer:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

body.input-focused .composer,
.composer.has-focus {
  transform: translateY(-1px);
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow);
}

.composer.is-sending .send {
  animation: send-press 150ms var(--ease-standard);
}

@keyframes send-press {
  0% { transform: scale(1); }
  45% { transform: scale(0.92); }
  100% { transform: scale(1); }
}

.composer-top {
  padding: 2px 2px 8px;
  margin-bottom: 8px;
  gap: 10px;
}

.mode-group {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 3px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 100%;
}
.mode-group::-webkit-scrollbar { display: none; }

.mode-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: var(--mode-w, 64px);
  transform: translateX(var(--mode-x, 0px));
  border-radius: 999px;
  background: var(--surface-3);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset;
  pointer-events: none;
  transition: transform 200ms var(--ease-standard), width 200ms var(--ease-standard);
  z-index: 0;
}

.mode-pill {
  position: relative;
  z-index: 1;
  height: 34px;
  min-height: 34px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--text-faint);
  white-space: nowrap;
  flex: 0 0 auto;
}

.mode-pill.active {
  background: transparent;
  border-color: transparent;
  color: var(--text);
}

.composer-mode-note {
  font-size: 11.5px;
}

.composer textarea {
  min-height: 28px;
  max-height: 160px;
  font-size: 16px;
}

.send {
  width: 44px;
  height: 44px;
}

.composer-hint .phrase {
  color: var(--text-faint);
  background: none;
  -webkit-text-fill-color: currentColor;
  animation: none;
}

/* ── Research pipeline ── */
.research-steps {
  min-width: 0;
  width: min(100%, 320px);
}

.rstep-ic .ring {
  animation: none;
}

.rstep.active .activity-dot,
.activity-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  display: block;
  animation: activity-pulse 1.6s ease-in-out infinite;
}

.rstep .ring {
  width: 8px;
  height: 8px;
  border-width: 1.5px;
}

.rstep.active .ring {
  display: none;
}

@keyframes activity-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1); }
}

/* ── Sources ── */
.src-chip,
.source-card {
  animation: source-arrive 220ms var(--ease-enter);
}

@keyframes source-arrive {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.src-chip {
  width: min(190px, 72vw);
}

.cite {
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  cursor: pointer;
}

/* ── Jump to latest ── */
.jump-latest {
  transform: translate(-50%, 6px);
  transition: opacity var(--motion-fast) var(--ease-enter),
    transform var(--motion-fast) var(--ease-enter);
}
.jump-latest.show {
  transform: translate(-50%, 0);
}

/* ── Source rail ── */
.source-rail {
  display: none;
  min-width: 0;
}

.source-rail.is-on {
  display: none;
}

.source-rail-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.source-rail-title {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.source-card {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 8px 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  width: 100%;
  text-align: left;
  background: none;
  border-left: 0;
  border-right: 0;
  border-top: 0;
  color: inherit;
  cursor: pointer;
}

.source-card__favicon {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: var(--surface);
}

.source-card__domain {
  font-size: 11px;
  color: var(--text-faint);
}

.source-card__title {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.35;
  color: var(--text-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.source-card__meta {
  grid-column: 2;
  font-size: 11px;
  color: var(--text-faint);
}

/* ── Citation preview ── */
.cite-preview,
.cite-sheet {
  display: none;
}

.cite-preview.is-on,
.cite-preview.is-on[hidden] {
  display: block;
  position: absolute;
  z-index: 70;
  width: min(320px, calc(100vw - 32px));
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border-strong);
  background: var(--bg-2);
  box-shadow: var(--shadow-xl);
}

.cite-preview__source {
  font-size: 11px;
  color: var(--text-faint);
  margin-bottom: 4px;
}

.cite-preview__title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}

.cite-preview__excerpt {
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.cite-preview__open,
.cite-sheet__open {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 13px;
  color: var(--accent);
}

.cite-sheet-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(0, 0, 0, 0.4);
}

.cite-sheet-overlay.is-on,
.cite-sheet-overlay.is-on[hidden] { display: block; }

.cite-sheet.is-on,
.cite-sheet.is-on[hidden] {
  display: block;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 85;
  padding: 16px 16px max(16px, env(safe-area-inset-bottom));
  border-radius: 18px 18px 0 0;
  border: 1px solid var(--border);
  background: var(--bg-2);
  box-shadow: var(--shadow-xl);
  animation: source-arrive 220ms var(--ease-enter);
}

.cite-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.cite-sheet-close {
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

/* ── Chat list ── */
.chat-item {
  min-height: 44px;
}

@media (hover: hover) and (pointer: fine) {
  .chat-del { opacity: 0; }
  .chat-item:hover .chat-del,
  .chat-item:focus-within .chat-del { opacity: 1; }
}

@media (hover: none) {
  .chat-del { opacity: 1; }
}

.chat-skel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
}

.chat-skel span {
  display: block;
  height: 10px;
  border-radius: 6px;
  background: rgba(127, 127, 127, 0.16);
  animation: pulse 1.8s ease-in-out infinite;
}
.chat-skel span:nth-child(1) { width: 88%; }
.chat-skel span:nth-child(2) { width: 56%; }

/* ── Drawer ── */
.drawer {
  width: var(--chat-rail);
  padding-top: env(safe-area-inset-top);
}

.drawer-site {
  display: none;
  padding: 8px 10px 12px;
  border-bottom: 1px solid var(--border);
}

.drawer-site a,
.drawer-site .mobile-menu__label {
  display: block;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--text-soft);
}

.drawer-site .mobile-menu__label {
  min-height: 0;
  padding: 14px 12px 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ── How it works timeline (overrides cinematic pin) ── */
.sm-how {
  width: auto;
  margin: 40px 0 8px;
  background: transparent;
  color: inherit;
}

.sm-how__pin {
  height: auto;
  overflow: visible;
  background: transparent;
  padding: 0;
}

.sm-how__canvas,
.sm-how__veil,
.sm-how__pips,
.sm-how__progress { display: none !important; }

.sm-how__copy {
  position: relative;
  padding: 0;
  align-items: flex-start;
  text-align: left;
  pointer-events: auto;
}

.sm-how__kicker {
  color: var(--text-faint);
  margin-bottom: 18px;
}

.sm-how__acts {
  position: relative;
  width: 100%;
  min-height: 0;
  display: grid;
  gap: 0;
}

.sm-how__act {
  position: relative;
  inset: auto;
  opacity: 1;
  transform: none;
  filter: none;
  padding: 0 0 22px 22px;
}

.sm-how__act::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: -2px;
  width: 1px;
  background: var(--border-strong);
}

.sm-how__act:last-of-type::before { display: none; }

.sm-how__act.is-in .sm-how__index,
.sm-how__act.is-in .sm-how__title,
.sm-how__act.is-in .sm-how__body {
  opacity: 1;
  transform: none;
}

.sm-how__index {
  color: var(--text-faint);
  margin-bottom: 4px;
}

.sm-how__title {
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  color: var(--text);
}

.sm-how__body {
  margin: 6px 0 0;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
}

.sm-how__cta {
  opacity: 1;
  pointer-events: auto;
  margin-top: 8px;
  margin-left: 22px;
  background: var(--send-bg);
  color: var(--send-fg);
  box-shadow: none;
}

.sm-how-line {
  display: none;
}

/* ── Breakpoints ── */
@media (max-width: 767px) {
  .page,
  .topbar-inner {
    width: calc(100% - 24px);
  }

  .topbar-inner { height: 52px; gap: 8px; }

  .hamburger { display: inline-flex; }
  .brand-wordmark { display: inline; }
  .brand-logo { display: none; }

  .topnav > a,
  .topnav > .nav-drop,
  .site-menu-toggle,
  .site-mobile-menu,
  .theme-toggle,
  #historyBtn,
  .new-btn-label { display: none !important; }

  .hero {
    padding: 14px 0 6px;
  }

  .hero-logo { display: none; }

  .hero-title {
    font-size: clamp(1.85rem, 9vw, 2.35rem);
    max-width: none;
  }

  .hero-sub { display: none; }

  .trust-row { margin-top: 10px; gap: 6px 12px; }
  .hero-notes { display: none; }

  .starter-wrap { padding-top: 12px; }
  .starter-head { margin-bottom: 8px; }
  .support-block { margin-top: 36px; }

  .composer-wrap { padding: 10px 12px; padding-bottom: max(10px, env(safe-area-inset-bottom)); }
  .composer textarea { max-height: 140px; }

  .drawer-site { display: block; }
  .drawer-theme { display: inline-flex; }

  .new-btn,
  .icon-btn,
  .hamburger {
    width: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    justify-content: center;
  }

  .mini-grid { grid-template-columns: 1fr; }
}

@media (min-width: 480px) {
  :root { --page-gutter: 16px; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .shell { padding-left: 0; }
  .composer-wrap { left: 0; }
  .page { width: min(calc(100% - 32px), 1440px); }
  .hero { padding-top: 28px; }
  .source-rail,
  .source-rail.is-on { display: none !important; }
}

@media (min-width: 1024px) {
  .drawer-theme,
  .drawer-site { display: none; }

  .shell {
    padding-left: var(--chat-rail);
    display: block;
  }

  .drawer {
    width: var(--chat-rail);
  }

  .page {
    width: min(calc(100% - 48px), 1440px);
  }

  .workspace-main,
  .conversation,
  .composer-shell {
    max-width: var(--answer-max-width);
  }

  .composer-wrap { left: var(--chat-rail); }

  .sm-how__acts {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    position: relative;
  }

  .sm-how__act {
    padding: 28px 0 0;
  }

  .sm-how__act::before { display: none; }

  .sm-how-line {
    display: block;
    position: absolute;
    top: 7px;
    left: 8%;
    right: 8%;
    height: 1px;
    background: var(--border);
    overflow: hidden;
  }

  .sm-how-line > span {
    display: block;
    height: 100%;
    width: 0;
    background: var(--text-faint);
    transform-origin: left center;
  }

  .sm-how.is-revealed .sm-how-line > span {
    animation: how-line 700ms var(--ease-standard) forwards;
  }

  @keyframes how-line {
    to { width: 100%; }
  }

  .sm-how__cta { margin-left: 0; }
}

@media (min-width: 1280px) {
  .app-active.has-sources .page {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--source-rail);
    gap: 36px;
    align-items: start;
    width: min(calc(100% - 48px), 1440px);
  }

  .app-active.has-sources .conversation {
    grid-column: 1;
  }

  .source-rail.is-on {
    display: block;
    position: sticky;
    top: 76px;
    padding-top: 20px;
    padding-bottom: calc(var(--composer-h) + 16px);
  }
}

@media (min-width: 1536px) {
  .page,
  .topbar-inner {
    width: min(calc(100% - 64px), 1440px);
  }
}

@media (max-width: 380px) {
  .mode-pill { padding: 0 10px; }
  .page,
  .topbar-inner { width: calc(100% - 20px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .hero-item,
  .src-chip,
  .source-card,
  .msg,
  .stream-block,
  .research-steps {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }

  .activity-dot { animation: none !important; opacity: 1; }
}