/* ============================================================
   HELIOS — Internal AI Agent Design System
   "Graphite & Solar" — dark graphite chrome, porcelain canvas,
   solar-amber brand accent. Shared base for chat (index.html)
   and Operations Console (backend.html).
   ============================================================ */

:root {
  /* Canvas — cool porcelain */
  --paper:         #F4F5F7;
  --paper-deep:    #EAECF0;
  --paper-tint:    #F0F1F4;
  --surface:       #FFFFFF;

  /* Ink scale */
  --ink:           #15181D;
  --ink-soft:      #3A3F47;
  --ink-mute:      #676E79;
  --ink-faint:     #8A909B;

  /* Rules / borders */
  --rule:          #E2E4E9;
  --rule-strong:   #C8CCD4;

  /* Brand accent: solar amber */
  --accent:        #B45309;
  --accent-hover:  #93430A;
  --accent-soft:   #FAEEDD;
  --accent-on:     #FFFFFF;

  /* Sidebar chrome — graphite */
  --side-bg:       #14171C;
  --side-bg-raise: #1D2129;
  --side-ink:      #E9EBEF;
  --side-mute:     #9AA1AC;
  --side-faint:    #6B7280;
  --side-rule:     rgba(255,255,255,0.08);

  /* Semantic */
  --success:       #1E7F4F;
  --success-soft:  #DFF1E6;
  --warning:       #8A6500;
  --warning-soft:  #F7ECCB;
  --danger:        #BB3A36;
  --danger-soft:   #F9E4E2;

  /* Legacy variable bridges so inline style="color: var(--text-muted)" etc. still resolves */
  --primary:       var(--accent);
  --primary-hover: var(--accent-hover);
  --text-main:     var(--ink);
  --text-muted:    var(--ink-mute);
  --border:        var(--rule);
  --bg-page:       var(--paper);
  --bg-panel:      var(--surface);
  --bg-dark:       var(--ink);

  /* Typography */
  --serif: "Schibsted Grotesk", "Instrument Sans", system-ui, sans-serif; /* display voice */
  --sans:  "Instrument Sans", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SF Mono", "Menlo", monospace;

  /* Spacing scale (8pt) */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px;
  --s-5: 24px; --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;

  /* Radius */
  --r-1: 4px; --r-2: 8px; --r-3: 12px; --r-4: 16px;

  /* Shadows — soft, layered, restrained */
  --shadow-sm: 0 1px 2px rgba(21,24,29,0.05);
  --shadow:    0 12px 32px -16px rgba(21,24,29,0.22), 0 2px 6px rgba(21,24,29,0.06);
  --shadow-lift: 0 20px 48px -20px rgba(21,24,29,0.28);

  --header-h: 60px;
  --content-max: 768px;
  --content-wide: 1180px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--accent); color: var(--accent-on); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
h1 { font-size: clamp(2rem, 3.5vw, 2.75rem); line-height: 1.08; letter-spacing: -0.03em; }
h2 { font-size: 1.6rem; line-height: 1.15; }
h3 { font-size: 1.2rem; line-height: 1.25; }
h4 { font-size: 1rem; line-height: 1.3; }

p { margin: 0 0 1rem; color: var(--ink-soft); }

code, pre, kbd, .mono { font-family: var(--mono); font-size: 0.85em; }

/* Micro-label utility (mono, uppercase, tracked) */
.microlabel {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
}

/* ============================================================
   APP SHELL — graphite sidebar + porcelain main column
   ============================================================ */

.app-container {
  display: grid;
  grid-template-columns: 264px 1fr;
  min-height: 100vh;
  background: var(--paper);
}

/* Sidebar — dark graphite chrome */
.sidebar {
  background: var(--side-bg);
  color: var(--side-ink);
  border-right: 1px solid var(--side-rule);
  padding: var(--s-5) var(--s-4);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: var(--s-1) var(--s-2) var(--s-6);
  color: var(--side-ink);
}
.brand svg {
  width: 26px;
  height: 26px;
  stroke: var(--accent);
  filter: drop-shadow(0 0 8px rgba(180,83,9,0.45));
  flex-shrink: 0;
}
.brand span {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand .brand-env {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--side-mute);
  border: 1px solid var(--side-rule);
  border-radius: var(--r-1);
  padding: 3px 6px;
  text-transform: uppercase;
}

/* New conversation — sidebar CTA */
.new-chat-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  margin-bottom: var(--s-5);
  background: var(--side-bg-raise);
  color: var(--side-ink);
  border: 1px solid var(--side-rule);
  border-radius: var(--r-2);
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}
.new-chat-btn:hover { background: #252A33; border-color: rgba(255,255,255,0.16); }
.new-chat-btn svg { width: 16px; height: 16px; stroke: var(--accent); }
.new-chat-btn kbd {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--side-faint);
  border: 1px solid var(--side-rule);
  border-radius: 4px;
  padding: 1px 5px;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.nav-section-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--side-faint);
  padding: 0 10px;
  margin: var(--s-3) 0 var(--s-2);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 9px 10px;
  font-size: 0.9rem;
  color: var(--side-mute);
  cursor: pointer;
  border-radius: var(--r-2);
  transition: background 120ms ease, color 120ms ease;
  font-weight: 500;
  position: relative;
}
.nav-item svg { width: 17px; height: 17px; stroke: currentColor; opacity: 0.8; }
.nav-item:hover { background: rgba(255,255,255,0.05); color: var(--side-ink); }
.nav-item.active {
  background: var(--side-bg-raise);
  color: var(--side-ink);
  border: none;
  box-shadow: inset 0 0 0 1px var(--side-rule);
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
}
.nav-item.active svg { opacity: 1; stroke: var(--accent); }

/* Sidebar system-status block */
.side-status {
  margin-top: var(--s-4);
  padding: var(--s-3) var(--s-3) var(--s-2);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--side-rule);
  border-radius: var(--r-2);
}
.side-status-title {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--side-faint);
  margin-bottom: var(--s-2);
}
.side-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  padding: 4px 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--side-mute);
}
.side-status-row .value {
  color: var(--side-ink);
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--side-faint);
  flex-shrink: 0;
}
.status-dot.ok    { background: #34C77B; box-shadow: 0 0 6px rgba(52,199,123,0.6); }
.status-dot.warn  { background: #E8A33D; box-shadow: 0 0 6px rgba(232,163,61,0.6); }
.status-dot.err   { background: #E5564F; box-shadow: 0 0 6px rgba(229,86,79,0.6); }
.status-dot.pulse { animation: dot-pulse 2.2s ease-in-out infinite; }
@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* Sidebar footer (admin link etc.) */
.gdpr-sidebar {
  margin-top: var(--s-4);
  padding-top: var(--s-4);
  border-top: 1px solid var(--side-rule);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.gdpr-sidebar-title {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--side-faint);
  margin-bottom: 4px;
  padding: 0 8px;
}
.gdpr-link, .gdpr-btn {
  font-size: 0.84rem;
  color: var(--side-mute);
  text-decoration: none;
  padding: 7px 8px;
  border-radius: var(--r-1);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: var(--sans);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}
.gdpr-link svg, .gdpr-btn svg { width: 15px; height: 15px; stroke: currentColor; opacity: 0.7; }
.gdpr-link:hover, .gdpr-btn:hover {
  background: rgba(255,255,255,0.05);
  color: var(--side-ink);
  text-decoration: none;
}
.gdpr-btn-danger { color: #E5837E; }
.gdpr-btn-danger:hover { background: rgba(229,86,79,0.12); color: #F0A09B; }

/* Main content area */
.main-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
  background: var(--paper);
  position: relative;
}

/* Subtle dot-grid texture on the canvas */
.main-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(21,24,29,0.045) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
  z-index: 0;
}
.main-content > * { position: relative; z-index: 1; }

/* Page header bar */
.page-header {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  height: var(--header-h);
  padding: 0 var(--s-6);
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}
.page-header .page-title {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.page-header .page-sub {
  font-size: 0.8rem;
  color: var(--ink-mute);
  border-left: 1px solid var(--rule);
  padding-left: var(--s-4);
}
.page-header .header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--s-3);
}
.health-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 5px 12px;
}
.env-chip {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(180,83,9,0.22);
  border-radius: var(--r-1);
  padding: 4px 8px;
}

/* Mobile top nav — hidden on desktop */
.top-nav {
  display: none;
  border-bottom: 1px solid var(--rule);
  padding: 0 var(--s-4);
  gap: var(--s-2);
  background: var(--paper);
}
.top-nav .nav-item {
  padding: 12px 6px;
  margin: 0;
  border-radius: 0;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent !important;
  box-shadow: none;
  font-size: 0.9rem;
  color: var(--ink-mute);
}
.top-nav .nav-item.active {
  border-bottom-color: var(--accent);
  background: transparent !important;
  color: var(--ink);
}
.top-nav .nav-item.active::before { display: none; }

/* Demo banner */
.demo-banner {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: 9px var(--s-6);
  background: var(--warning-soft);
  color: var(--warning);
  font-size: 0.8rem;
  border-bottom: 1px solid rgba(138,101,0,0.16);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
.demo-banner svg { stroke: var(--warning); flex-shrink: 0; }

.readonly-banner {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 9px var(--s-6);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  border-bottom: 1px solid rgba(180,83,9,0.16);
}
.readonly-kicker {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  padding: 3px 7px;
  border: 1px solid rgba(180,83,9,0.25);
  border-radius: var(--r-1);
  background: rgba(255,255,255,0.6);
  flex-shrink: 0;
}

/* Views — full-bleed swappable surfaces */
.view { display: none; flex: 1; min-height: 0; }
.view.active { display: flex; flex-direction: column; }

/* ============================================================
   CHAT
   ============================================================ */

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

#view-chat { overflow: hidden; }

.chat-history {
  flex: 1;
  overflow-y: auto;
  padding: var(--s-6) var(--s-5) var(--s-5);
  scroll-behavior: smooth;
}

/* Message block */
.message {
  max-width: var(--content-max);
  margin: 0 auto var(--s-6);
  width: 100%;
  display: flex;
  gap: var(--s-3);
  animation: msg-in 280ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--r-2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--serif);
  font-size: 0.78rem;
  font-weight: 700;
  margin-top: 1px;
}
.message.bot .msg-avatar {
  background: var(--side-bg);
  color: var(--accent);
  box-shadow: 0 2px 8px rgba(21,24,29,0.25);
}
.message.bot .msg-avatar svg { width: 16px; height: 16px; stroke: var(--accent); }
.message.user .msg-avatar {
  background: var(--paper-deep);
  color: var(--ink-mute);
  border: 1px solid var(--rule);
}

.msg-main { flex: 1; min-width: 0; }

.message-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 5px;
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  letter-spacing: -0.01em;
}
.message.bot .message-label .label-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 2px 6px;
}

.msg-bubble {
  font-size: 0.97rem;
  line-height: 1.65;
  color: var(--ink-soft);
}
.message.user .msg-bubble {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  padding: var(--s-3) var(--s-4);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
.msg-bubble > * { margin: 0 0 0.85rem; }
.msg-bubble > *:last-child { margin-bottom: 0; }
.msg-bubble strong { font-weight: 600; color: var(--ink); }
.msg-bubble code {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  border-radius: var(--r-1);
  font-size: 0.84em;
  color: var(--ink);
}
.msg-bubble pre {
  background: var(--side-bg);
  color: #E9EBEF;
  padding: var(--s-4);
  border-radius: var(--r-2);
  overflow-x: auto;
  line-height: 1.5;
  border: 1px solid rgba(255,255,255,0.06);
}
.msg-bubble pre code { background: transparent; border: none; padding: 0; color: inherit; font-size: 0.85rem; }
.msg-bubble blockquote {
  border-left: 3px solid var(--accent);
  padding: 2px 0 2px var(--s-4);
  margin: var(--s-4) 0;
  color: var(--ink-soft);
}
.msg-bubble ul, .msg-bubble ol { padding-left: 1.25rem; }
.msg-bubble li { margin-bottom: 0.35rem; }
.msg-bubble table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
.msg-bubble th, .msg-bubble td { border: 1px solid var(--rule); padding: 6px 10px; text-align: left; }
.msg-bubble th { background: var(--paper-tint); font-weight: 600; }

/* Response meta (latency, sources count) under bot replies */
.msg-meta {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-top: var(--s-3);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}
.msg-meta .meta-item { display: inline-flex; align-items: center; gap: 5px; }
.msg-meta svg { width: 11px; height: 11px; stroke: currentColor; }

/* Typing indicator */
.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 2px;
}
.typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  animation: typing-bounce 1.2s ease-in-out infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Welcome / hero state for the empty chat */
.welcome-hero {
  max-width: var(--content-max);
  margin: clamp(32px, 7vh, 88px) auto var(--s-6);
  padding: 0 var(--s-2);
  width: 100%;
  animation: msg-in 400ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
.welcome-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--s-4);
}
.welcome-kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.welcome-hero h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--ink);
}
.welcome-hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.welcome-hero p {
  font-size: 0.95rem;
  color: var(--ink-mute);
  margin-top: var(--s-4);
  max-width: 600px;
  white-space: pre-line;
  line-height: 1.6;
}

/* Suggestion cards — 2×2 grid */
.welcome-suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
  margin-top: var(--s-6);
}
.suggestion {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  padding: var(--s-4);
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--ink-soft);
  width: 100%;
  text-align: left;
  font-family: var(--sans);
  line-height: 1.45;
  transition: border-color 140ms, box-shadow 140ms, transform 140ms;
  box-shadow: var(--shadow-sm);
}
.suggestion:hover {
  border-color: rgba(180,83,9,0.4);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  color: var(--ink);
}
.suggestion .sug-dot {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}
.suggestion .sug-arrow {
  margin-left: auto;
  color: var(--ink-faint);
  font-family: var(--mono);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 140ms, transform 140ms;
  flex-shrink: 0;
}
.suggestion:hover .sug-arrow { opacity: 1; transform: translateX(0); color: var(--accent); }

/* Source result cards — citations below a bot reply */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
  margin-top: var(--s-4);
  padding-top: var(--s-4);
  border-top: 1px solid var(--rule);
}
.results-grid::before {
  content: "Sources";
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 2px;
}
.result-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-2);
  padding: var(--s-3) var(--s-4);
  font-size: 0.84rem;
  cursor: pointer;
  transition: border-color 120ms, box-shadow 120ms, transform 120ms;
}
.result-card:hover {
  border-color: rgba(180,83,9,0.45);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-3);
  margin-bottom: var(--s-2);
  font-weight: 600;
  color: var(--ink);
  font-size: 0.85rem;
}
.result-header span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.result-text {
  color: var(--ink-mute);
  line-height: 1.5;
  font-size: 0.8rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.score-badge {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: var(--r-1);
  background: var(--paper-deep);
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}
.match-high { background: var(--success-soft); color: var(--success); }
.match-med  { background: var(--warning-soft); color: var(--warning); }

/* ============================================================
   COMPOSER — floating card
   ============================================================ */

.input-zone {
  flex-shrink: 0;
  padding: 0 var(--s-5) var(--s-4);
  position: relative;
}
.input-zone::before {
  content: "";
  position: absolute;
  top: -32px;
  left: 0;
  right: 0;
  height: 32px;
  background: linear-gradient(to top, var(--paper), transparent);
  pointer-events: none;
}

.input-area {
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: flex-end;
  gap: var(--s-2);
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-4);
  padding: var(--s-3) var(--s-3) var(--s-3) var(--s-4);
  box-shadow: var(--shadow);
  transition: border-color 140ms, box-shadow 140ms;
}
.input-area:focus-within {
  border-color: var(--accent);
  box-shadow: var(--shadow-lift), 0 0 0 3px var(--accent-soft);
}

textarea {
  flex: 1;
  resize: none;
  border: none;
  background: transparent;
  padding: 8px 0;
  font-family: var(--sans);
  font-size: 0.97rem;
  line-height: 1.45;
  color: var(--ink);
  min-height: 38px;
  max-height: 200px;
  outline: none;
}
textarea::placeholder { color: var(--ink-faint); }

.composer-hint {
  max-width: var(--content-max);
  margin: var(--s-2) auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding: 0 var(--s-2);
}
.composer-hint kbd {
  border: 1px solid var(--rule);
  background: var(--surface);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.6rem;
}

.chat-attachments {
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  padding: 0 var(--s-2) var(--s-3);
}
.chat-attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 4px 4px 10px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--ink-soft);
  box-shadow: var(--shadow-sm);
}
.chat-attachment-chip button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 100px;
  color: var(--ink-mute);
  font-size: 1rem;
  line-height: 1;
}
.chat-attachment-chip button:hover { background: var(--paper-deep); color: var(--ink); }

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--r-2);
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  color: var(--ink);
  transition: background 120ms, border-color 120ms, color 120ms, transform 80ms, box-shadow 120ms;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn svg { width: 16px; height: 16px; stroke: currentColor; }

.btn-primary {
  background: var(--ink);
  color: #FFFFFF;
  border-color: var(--ink);
  box-shadow: 0 2px 8px rgba(21,24,29,0.25);
}
.btn-primary:hover:not(:disabled) {
  background: #272C35;
  border-color: #272C35;
  box-shadow: 0 4px 14px rgba(21,24,29,0.3);
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--rule-strong);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--paper-tint);
  border-color: var(--ink-faint);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: rgba(187,58,54,0.5);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--paper-deep);
  color: var(--ink);
}

.btn-sm { padding: 6px 10px; font-size: 0.78rem; }

/* Composer icon buttons */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--r-2);
  border: none;
  background: transparent;
  color: var(--ink-mute);
  cursor: pointer;
  transition: background 120ms, color 120ms;
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--paper-deep); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; stroke: currentColor; }

.send-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--r-2);
  border: none;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  transition: background 120ms, transform 80ms, box-shadow 120ms;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(21,24,29,0.25);
}
.send-btn:hover:not(:disabled) { background: var(--accent); box-shadow: 0 4px 12px rgba(180,83,9,0.35); }
.send-btn:active { transform: translateY(1px); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.send-btn svg { width: 17px; height: 17px; stroke: currentColor; }

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Menu toggle (mobile) */
.menu-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 60;
  background: var(--side-bg);
  border: 1px solid var(--side-rule);
  border-radius: var(--r-2);
  width: 40px;
  height: 40px;
  cursor: pointer;
  padding: 8px;
  color: var(--side-ink);
  box-shadow: var(--shadow);
}
.menu-toggle svg { width: 24px; height: 24px; }

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(21,24,29,0.5);
  z-index: 40;
  opacity: 0;
  transition: opacity 200ms;
}
.sidebar-backdrop.show { display: block; opacity: 1; }

/* ============================================================
   KNOWLEDGE BASE / ADMIN VIEW
   ============================================================ */

.admin-container {
  flex: 1;
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--s-6) var(--s-7);
  overflow-y: auto;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--s-6);
  padding-bottom: var(--s-5);
  border-bottom: 1px solid var(--rule);
  gap: var(--s-4);
}
.panel-header h2 {
  font-family: var(--serif);
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  position: relative;
}
.panel-deck {
  max-width: 520px;
  margin: var(--s-3) 0 0;
  color: var(--ink-mute);
  font-size: 0.93rem;
  line-height: 1.55;
}
.panel-header h2::before {
  content: "Operations";
  display: block;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--s-2);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  padding: var(--s-6);
  margin-bottom: var(--s-5);
  box-shadow: var(--shadow-sm);
}
.panel h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--s-2);
  letter-spacing: -0.015em;
}
.panel > p { font-size: 0.93rem; color: var(--ink-mute); margin-bottom: var(--s-5); }

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--s-4);
}
.status-indicator {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

/* Drop zone */
.drop-zone {
  border: 1.5px dashed var(--rule-strong);
  border-radius: var(--r-3);
  padding: var(--s-7) var(--s-5);
  text-align: center;
  cursor: pointer;
  background: var(--paper-tint);
  transition: all 150ms ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
  color: var(--ink-soft);
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}
.drop-zone strong { font-family: var(--serif); font-weight: 600; font-size: 1.05rem; color: var(--ink); }
.icon-upload {
  width: 32px;
  height: 32px;
  color: var(--ink-mute);
  stroke-width: 1.5;
}

.read-only-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-4);
  align-items: start;
  padding: var(--s-5);
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  background:
    linear-gradient(135deg, rgba(180,83,9,0.06), transparent 42%),
    var(--paper-tint);
}
.read-only-mark {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--accent);
  border: 1px solid rgba(180,83,9,0.25);
  background: var(--surface);
  border-radius: var(--r-1);
  padding: 4px 8px;
}
.read-only-panel strong {
  display: block;
  color: var(--ink);
  margin-bottom: 3px;
}
.read-only-panel span {
  color: var(--ink-mute);
  font-size: 0.9rem;
}

/* Document table */
.table-responsive { width: 100%; overflow-x: auto; }
.doc-table {
  width: 100%;
  border-collapse: collapse;
}
.doc-table thead { border-bottom: 1px solid var(--rule); }
.doc-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: var(--s-3) var(--s-3) var(--s-3) 0;
}
.doc-table td {
  padding: var(--s-4) var(--s-3) var(--s-4) 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table td strong { color: var(--ink); font-weight: 600; }
.actions-cell {
  text-align: right;
  white-space: nowrap;
}
.actions-cell .btn { padding: 6px 8px; }
.locked-action {
  display: inline-flex;
  align-items: center;
  margin-left: var(--s-2);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--r-1);
  text-transform: uppercase;
  background: var(--paper-deep);
  color: var(--ink-mute);
  border: 1px solid var(--rule);
}
.badge-txt  { background: var(--paper-deep); color: var(--ink-mute); }
.badge-pdf  { background: var(--danger-soft); color: var(--danger); border-color: rgba(187,58,54,0.2); }
.badge-docx { background: var(--accent-soft); color: var(--accent); border-color: rgba(180,83,9,0.18); }
.badge-csv  { background: var(--success-soft); color: var(--success); border-color: rgba(30,127,79,0.18); }

/* ============================================================
   MODAL
   ============================================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(21,24,29,0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--s-4);
}
.modal-backdrop.open { display: flex; }
.modal-panel {
  background: var(--surface);
  border-radius: var(--r-3);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow-lift);
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: scale(0.98);
  transition: transform 180ms;
}
.modal-backdrop.open .modal-panel { transform: scale(1); }
.modal-header {
  padding: var(--s-4) var(--s-6);
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}
.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-mute);
  padding: 4px 8px;
  border-radius: var(--r-1);
}
.close-btn:hover { background: var(--paper-deep); color: var(--ink); }
.modal-body {
  padding: var(--s-6);
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 0.83rem;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--paper-tint);
  white-space: pre-wrap;
}

/* ============================================================
   TOAST
   ============================================================ */

.toast {
  position: fixed;
  top: var(--s-5);
  right: var(--s-5);
  padding: var(--s-3) var(--s-5);
  border-radius: var(--r-2);
  font-size: 0.88rem;
  font-weight: 500;
  background: var(--side-bg);
  color: var(--side-ink);
  border: 1px solid var(--side-rule);
  box-shadow: var(--shadow-lift);
  z-index: 200;
  transition: transform 200ms, opacity 200ms;
}
.toast-success { border-left: 3px solid #34C77B; }
.toast-error   { border-left: 3px solid #E5564F; }
.toast-hide    { opacity: 0; transform: translateY(-6px); }

/* ============================================================
   GDPR / EU banner (preserved structures)
   ============================================================ */

.eu-banner {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: 10px var(--s-5);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
.eu-banner:hover { background: rgba(250,238,221,0.7); }
.eu-flag { font-size: 1rem; }
.eu-text { flex: 1; }
.eu-chevron { font-size: 0.7rem; opacity: 0.7; }

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: var(--s-4);
  background: var(--paper-tint);
  border-bottom: 1px solid var(--rule);
}
.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-2);
  min-width: 88px;
}
.flow-icon { font-size: 1.3rem; }
.flow-label { font-size: 0.72rem; color: var(--ink-soft); }
.flow-label small { color: var(--ink-mute); font-size: 0.62rem; }
.flow-arrow { color: var(--ink-faint); }

.consent-modal {
  position: fixed;
  inset: 0;
  background: rgba(21,24,29,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  padding: var(--s-4);
}

/* ============================================================
   CORNER CREDITS
   ============================================================ */
.corner-credits {
  position: fixed;
  bottom: 12px;
  right: 16px;
  font-family: var(--mono);
  font-size: 0.64rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  pointer-events: none;
  z-index: 5;
}

/* ============================================================
   RESPONSIVE — mobile
   ============================================================ */

@media (max-width: 900px) {
  .app-container { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 0; left: 0;
    width: 284px;
    height: 100vh;
    transform: translateX(-100%);
    transition: transform 220ms ease;
    z-index: 50;
    box-shadow: var(--shadow-lift);
  }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .top-nav { display: flex; padding-left: 64px; min-height: 56px; align-items: center; }
  .page-header { padding-left: 64px; }
  .page-header .page-sub { display: none; }
  .admin-container { padding: var(--s-5) var(--s-4); }
  .panel-header { flex-direction: column; align-items: flex-start; }
  .panel-header div { display: flex; gap: var(--s-2); flex-wrap: wrap; }
  .results-grid { grid-template-columns: 1fr; }
  .welcome-suggestions { grid-template-columns: 1fr; }
  .chat-history { padding: var(--s-5) var(--s-4); }
  .welcome-hero { margin-top: var(--s-6); padding: 0 var(--s-2); }
  .input-zone { padding: 0 var(--s-4) var(--s-4); }
  .readonly-banner { align-items: flex-start; }
  .corner-credits { display: none; }

  /* Documents as cards on mobile */
  .doc-table thead { display: none; }
  .doc-table, .doc-table tbody, .doc-table tr { display: block; }
  .doc-table tr {
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--r-2);
    padding: var(--s-4);
    margin-bottom: var(--s-3);
  }
  .doc-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border: none;
    font-size: 0.88rem;
  }
  .doc-table td::before {
    content: attr(data-label);
    font-family: var(--mono);
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-mute);
    font-weight: 600;
  }
  .doc-table td:first-child {
    display: block;
    border-bottom: 1px solid var(--rule);
    padding-bottom: var(--s-3);
    margin-bottom: var(--s-3);
    font-family: var(--serif);
    font-size: 1rem;
    color: var(--ink);
  }
  .doc-table td:first-child::before { display: none; }
  .doc-table td.actions-cell {
    justify-content: flex-end;
    border-top: 1px solid var(--rule);
    margin-top: var(--s-3);
    padding-top: var(--s-3);
    gap: var(--s-2);
  }
  .doc-table td.actions-cell::before { display: none; }
}

@media (max-width: 540px) {
  .welcome-hero h1 { font-size: 1.8rem; }
  .panel { padding: var(--s-5); }
  .read-only-panel { grid-template-columns: 1fr; }
  .modal-panel { max-height: 90vh; }
  .composer-hint .hint-keys { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}