/* ================================================================
   Optimize Everything V3 — style.css
   DM Sans · dark separators · blue accent · sidebar nav
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Variables ── */
:root {
  --bg: #FAFAF8;
  --text: #1a1a1a;
  --accent: #2B258E; /* rgb(43,37,142) */
  --grey: #8a8a8a;
  --border: #1a1a1a;
  --border-light: #d0d0cc;
  --dark: #0d0d0d;
  --radius: 4px;
  --header-h: 60px;
  --sidebar-w: 200px;
}

html { scroll-behavior: smooth; font-size: 15px; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-weight: 500;
  line-height: 1.2;
}

a { color: var(--accent); text-decoration: none; }
.hidden { display: none !important; }

/* ================================================================
   LOADING OVERLAY
   ================================================================ */
#loading-overlay {
  position: fixed; inset: 0;
  background: rgba(250,250,248,0.88);
  z-index: 9999;
  display: flex; align-items: center; justify-content: center;
}
.spinner-wrap { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.spinner {
  width: 32px; height: 32px;
  border: 2px solid var(--border-light); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.spinner-label {
  font-family: 'DM Sans', sans-serif; font-size: 12px;
  color: var(--grey); letter-spacing: 0.1em; text-transform: uppercase;
  transition: opacity 0.3s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ================================================================
   TOAST
   ================================================================ */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--dark); color: var(--bg);
  font-family: 'DM Sans', sans-serif; font-size: 13px;
  padding: 10px 18px; border-radius: var(--radius);
  z-index: 10000; opacity: 1; transition: opacity 0.3s ease; max-width: 340px;
}
.toast.toast-error  { background: #7a2020; }
.toast.toast-warn   { background: #7a5e1a; }
.toast.fade-out { opacity: 0; }

/* ================================================================
   LANDING — full-screen BayesO background
   ================================================================ */
#landing {
  position: relative;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 100vh;
  background-image: url('../BayesO.svg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.landing-hero {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; width: 100%; max-width: 720px;
  padding: 0 24px; z-index: 1;
}

.landing-logo {
  display: block;
  height: clamp(50px, 6vw, 80px);
  width: auto;
  margin-bottom: 48px;
  opacity: 0.95;
}

.landing-prompt {
  font-family: 'DM Sans', sans-serif;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 400;
  color: #ffffff;
  margin-bottom: 40px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.landing-input-wrap {
  width: 100%; max-width: 560px;
  margin-bottom: 24px;
}

.landing-input {
  width: 100%;
  font-family: 'DM Sans', sans-serif;
  font-size: 18px;
  color: var(--dark);
  background: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 18px 24px;
  outline: none;
  caret-color: var(--accent);
  transition: box-shadow 0.2s;
}
.landing-input:focus {
  box-shadow: 0 0 0 3px rgba(255,255,255,0.25);
}
.landing-input::placeholder {
  color: #b0b0b0;
}

.landing-start-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #ffffff;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius);
  padding: 12px 32px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}
.landing-start-btn:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.45);
  transform: translateY(-1px);
}
.landing-start-btn:active { transform: translateY(0); }

.landing-footer {
  position: absolute;
  bottom: 36px;
  z-index: 1;
}
.landing-load-link {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
  cursor: pointer;
}
.landing-load-link:hover { color: rgba(255,255,255,0.85); }

/* Load project dialog overlay */
.load-dialog {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.load-dialog-box {
  background: rgba(20,15,60,0.92);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 36px 40px;
  width: 100%; max-width: 440px;
  backdrop-filter: blur(20px);
}
.load-dialog-title {
  font-family: 'DM Sans', sans-serif;
  font-size: 22px; font-weight: 500;
  color: #ffffff;
  margin-bottom: 8px;
}
.load-dialog-desc {
  font-size: 14px; color: rgba(255,255,255,0.55);
  margin-bottom: 24px; line-height: 1.5;
}
.load-dialog .landing-input {
  margin-bottom: 20px;
}
.load-dialog-actions {
  display: flex; gap: 12px; align-items: center;
}
.load-dialog-actions .btn-primary {
  flex-shrink: 0;
}

/* ================================================================
   HEADER (Banner background)
   ================================================================ */
#app-header {
  height: var(--header-h);
  background-image: url('../Banner.svg');
  background-size: cover;
  background-position: center;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex; align-items: center; padding: 0 24px; gap: 16px;
  border-bottom: 2px solid var(--border);
}
#app-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background 0.4s ease;
  pointer-events: none;
}
#app-header:hover::after {
  background: rgba(255,255,255,0.06);
}
.header-logo { cursor: pointer; flex-shrink: 0; position: relative; z-index: 1; }
.header-logo-img { display: block; height: 28px; width: auto; }
.header-center {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; overflow: hidden;
  position: relative; z-index: 1; gap: 2px;
}
.header-project-name {
  font-family: 'DM Sans', sans-serif; font-size: 18px; font-weight: 500; color: #ffffff;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 400px;
}
.header-project-id {
  font-family: 'DM Sans', sans-serif; font-size: 11px; color: rgba(255,255,255,0.5);
  cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 300px;
  transition: color 0.15s;
}
.header-project-id:hover { color: rgba(255,255,255,0.85); }
.header-actions { display: flex; gap: 10px; flex-shrink: 0; position: relative; z-index: 1; }

.btn-header {
  background: rgba(255,255,255,0.12);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 7px 16px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-header:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.45);
}
.btn-header svg {
  width: 12px; height: 12px; stroke: currentColor; fill: none; stroke-width: 2;
}

/* ================================================================
   APP BODY (sidebar + content)
   ================================================================ */
.app-body {
  display: flex;
  min-height: calc(100vh - var(--header-h));
}

/* ================================================================
   SIDEBAR NAVIGATION
   ================================================================ */
#page-nav {
  width: var(--sidebar-w);
  flex-shrink: 0;
  border-right: 2px solid var(--border);
  background: var(--bg);
  padding: 28px 0;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  gap: 0;
}
.page-btn {
  display: flex; align-items: center; gap: 10px;
  background: none; border: none; cursor: pointer;
  padding: 12px 24px;
  border-left: 3px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  color: var(--grey); white-space: nowrap;
}
.page-btn:hover { color: var(--text); background: rgba(0,0,0,0.02); }
.page-btn.active {
  color: var(--dark); border-left-color: var(--accent);
  background: rgba(43,37,142,0.04);
}
.page-btn.completed { color: var(--accent); }
.page-btn.completed .page-num { background: var(--accent); color: white; border-color: var(--accent); }
.page-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: transparent; border: 1px solid var(--border-light);
  font-family: 'DM Sans', sans-serif; font-size: 11px; font-weight: 600;
  flex-shrink: 0;
}
.page-btn.active .page-num { background: var(--accent); color: white; border-color: var(--accent); }
.page-label {
  font-family: 'DM Sans', sans-serif; font-size: 12px;
  font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase;
}
.page-connector { display: none; }

/* ================================================================
   MAIN CONTENT
   ================================================================ */
#content { flex: 1; min-width: 0; width: 100%; padding: 36px 40px 100px; }
.page-content { width: 100%; }

/* ================================================================
   SECTION STYLES
   ================================================================ */
.section { margin-bottom: 48px; }
.section-eyebrow {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px;
}
.section-title {
  font-family: 'DM Sans', sans-serif; font-size: 26px; font-weight: 500;
  color: var(--dark); margin-bottom: 16px; display: flex; align-items: center; gap: 10px;
}
.section-desc {
  font-size: 13px; color: var(--grey); line-height: 1.65; margin-bottom: 20px; max-width: 800px;
}
.subsection-label {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey);
  border-bottom: 1px solid var(--border); padding-bottom: 8px; margin-bottom: 16px;
}

/* ================================================================
   BUTTONS — all black with white text
   ================================================================ */
button { cursor: pointer; font-family: 'DM Sans', sans-serif; }

.btn-primary {
  background: var(--dark); color: #ffffff; border: 1px solid var(--dark);
  border-radius: var(--radius); font-size: 11px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase; padding: 10px 20px;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-primary:disabled { opacity: 0.35; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
  background: var(--dark); color: #ffffff; border: 1px solid var(--dark);
  border-radius: var(--radius); font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; padding: 10px 20px;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.btn-secondary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
.btn-secondary:active { transform: translateY(0); box-shadow: none; }

.btn-gold {
  background: var(--dark); color: #ffffff; border: 1px solid var(--dark);
  border-radius: var(--radius); font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; padding: 10px 20px;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.btn-gold:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }

.btn-sm { padding: 6px 14px; font-size: 10px; }
.btn-large { padding: 14px 36px; font-size: 12px; }

.btn-danger-soft {
  background: transparent; color: #9a2020; border: 1px solid #c0a0a0;
  border-radius: var(--radius); font-size: 10px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; padding: 6px 14px;
  transition: background 0.2s;
}
.btn-danger-soft:hover { background: #fff0f0; }

.btn-link {
  background: none; border: none; font-size: 11px; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--grey);
  padding: 3px 6px; border-radius: var(--radius); transition: color 0.15s;
}
.btn-link:hover { color: var(--text); }
.btn-link.btn-danger { color: #9a2020; }
.btn-link.btn-danger:hover { color: #6a0000; }

.btn-icon {
  background: none; border: none; color: var(--grey);
  font-size: 16px; padding: 2px 6px; border-radius: var(--radius); transition: color 0.2s;
}
.btn-icon:hover { color: #9a2020; }

.btn-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ================================================================
   FORMS & INPUTS
   ================================================================ */
.input-base {
  font-family: 'DM Sans', sans-serif; font-size: 13px; color: var(--text);
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px 12px; outline: none;
  transition: border-color 0.2s; width: 100%;
}
.input-base:focus { border-color: var(--accent); }
.input-base::placeholder { color: var(--grey); }

select.input-base {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238a8a8a'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; padding-right: 28px;
}

.field-row { display: flex; align-items: baseline; gap: 8px 12px; margin-bottom: 14px; flex-wrap: wrap; }
.field-label {
  font-family: 'DM Sans', sans-serif; font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--grey);
  min-width: 80px; flex-shrink: 0; white-space: nowrap;
}
.field-inline { display: flex; align-items: center; gap: 8px; flex: 1; }
.field-hint { font-size: 12px; color: var(--grey); line-height: 1.6; margin-bottom: 16px; }

.add-form {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border);
}

input[type="range"] {
  -webkit-appearance: none; height: 2px; background: var(--border-light); border-radius: 1px; flex: 1;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  border-radius: 50%; background: var(--accent); cursor: pointer; border: none;
}
input[type="checkbox"] { accent-color: var(--accent); cursor: pointer; }
input[type="radio"]    { accent-color: var(--accent); }

/* ================================================================
   INLINE SELECTOR (replaces dropdowns)
   ================================================================ */
.inline-selector {
  display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: center;
  min-width: 0; flex: 1;
}
.sel-opt {
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 400;
  color: var(--grey); cursor: pointer;
  padding: 4px 0;
  transition: color 0.15s;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.sel-opt:hover { color: var(--text); }
.sel-opt.active {
  color: var(--dark); font-weight: 600;
  border-bottom-color: var(--accent);
}

/* ================================================================
   CARDS
   ================================================================ */
.card {
  background: transparent; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.notice {
  background: rgba(43,37,142,0.05); border: 1px solid rgba(43,37,142,0.2);
  border-radius: var(--radius); padding: 16px 20px; font-size: 13px; color: var(--text);
}
.warn-box {
  background: rgba(154,32,32,0.05); border: 1px solid rgba(154,32,32,0.2);
  border-radius: var(--radius); padding: 12px 16px; font-size: 13px; color: #7a2020;
}
.info-box {
  background: rgba(43,37,142,0.04); border: 1px solid rgba(43,37,142,0.18);
  border-radius: var(--radius); padding: 12px 16px; font-size: 13px; color: var(--accent);
}

/* ================================================================
   METRICS
   ================================================================ */
.metric-row {
  display: flex; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin-bottom: 32px;
}
.metric-card {
  flex: 1; padding: 20px 24px; background: transparent;
  border-right: 1px solid var(--border);
}
.metric-card:last-child { border-right: none; }
.metric-label {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey); margin-bottom: 6px;
}
.metric-value { font-family: 'DM Sans', sans-serif; font-size: 32px; font-weight: 500; color: var(--dark); }
.metric-sub   { font-size: 11px; color: var(--grey); margin-top: 4px; }
.metric-card-gold { border-top: 3px solid var(--accent); }

/* ================================================================
   TABLES — larger font, full grid borders, bolder headings
   ================================================================ */
.table-wrap { overflow-x: auto; margin-bottom: 20px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.data-table th {
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--dark);
  background: transparent; padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left; white-space: nowrap;
}
.data-table td {
  padding: 11px 16px; border: 1px solid var(--border); color: var(--text);
}
.data-table tr:hover td { background: rgba(43,37,142,0.03); }
.data-table tr.row-complete td { background: rgba(134,239,172,0.18); }
.data-table tr.row-complete:hover td { background: rgba(134,239,172,0.30); }

.exp-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.exp-table th {
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--dark);
  background: transparent; padding: 12px 16px;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.exp-table td {
  padding: 11px 16px; border: 1px solid var(--border);
}
.exp-table tr:hover td { background: rgba(43,37,142,0.03); }
.exp-table tr.row-complete td { background: rgba(134,239,172,0.18); }
.exp-table tr.row-complete:hover td { background: rgba(134,239,172,0.30); }

.input-inline {
  font-family: 'DM Sans', sans-serif; font-size: 13px; color: var(--text);
  background: #fff; border: 1px solid #ccc; border-radius: var(--radius);
  padding: 4px 8px; width: 100px; outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.input-inline:hover { border-color: #999; }
.input-inline:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(43,37,142,0.12); }
.action-col { text-align: center; white-space: nowrap; padding: 0 10px; }
.cb-col { width: 32px; padding: 0 6px !important; text-align: center; }
.exp-cb, .exp-cb-all { width: 13px; height: 13px; cursor: pointer; accent-color: #8a8a8a; opacity: 0.55; }
.exp-cb:checked, .exp-cb-all:checked { opacity: 1; accent-color: #1a1a1a; }

.init-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.init-table th {
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--dark);
  background: transparent; padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.init-table td {
  padding: 10px 16px; border: 1px solid var(--border); color: var(--text);
}

/* ================================================================
   BADGES / TAGS
   ================================================================ */
.badge {
  display: inline-block; font-family: 'DM Sans', sans-serif; font-size: 9px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; padding: 2px 8px; border-radius: var(--radius);
}
.badge-max { background: rgba(43,37,142,0.1); color: var(--accent); border: 1px solid rgba(43,37,142,0.25); }
.badge-min { background: rgba(13,13,13,0.06); color: #444; border: 1px solid rgba(13,13,13,0.15); }
.source-tag {
  font-family: 'DM Sans', sans-serif; font-size: 9px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--grey);
  background: transparent; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2px 7px;
}
.stat-badge {
  font-family: 'DM Sans', sans-serif; font-size: 11px; font-weight: 500; color: var(--grey);
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius); padding: 2px 10px;
}
.badge-some-complete { color: #16a34a; background: rgba(134,239,172,0.15); border-color: rgba(134,239,172,0.5); }
.badge-all-complete  { color: #fff; background: #16a34a; border-color: #15803d; }
.code-id {
  font-family: 'SFMono-Regular', 'Consolas', monospace; font-size: 12px; color: var(--grey);
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 10px;
  word-break: break-all;
}

/* ================================================================
   MISC HELPERS
   ================================================================ */
.muted   { color: var(--grey); }
.empty-msg { font-size: 13px; color: var(--grey); font-style: italic; padding: 12px 0; }
.hint    { font-size: 11px; color: var(--grey); font-style: italic; margin-top: 8px; }
.error-msg { font-size: 13px; color: #9a2020; padding: 12px 0; }
.divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.chart-container { border: 1px solid var(--border); border-radius: var(--radius); background: transparent; min-height: 280px; padding: 8px; margin-bottom: 24px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-row { display: flex; align-items: center; gap: 12px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }

/* ================================================================
   DISCOVERY PAGE — CHAT
   ================================================================ */
.chat-wrap { }

.chat-input-row {
  display: flex; gap: 10px; align-items: flex-end; margin-bottom: 32px;
}
.chat-textarea {
  flex: 1; font-family: 'DM Sans', sans-serif; font-size: 16px;
  color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; outline: none; resize: none; min-height: 64px;
  max-height: 200px; overflow-y: auto; line-height: 1.5;
  transition: border-color 0.2s;
}
.chat-textarea:focus { border-color: var(--accent); }
.chat-textarea::placeholder { color: rgba(138,138,138,0.6); font-style: italic; }

/* Literature report */
.lit-report { margin-bottom: 36px; }

.lit-summary {
  font-size: 14px; line-height: 1.75; color: var(--text);
  margin-bottom: 28px; padding: 20px 24px;
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius);
}

.avenues-grid {
  display: flex; flex-direction: column;
  gap: 0; margin-bottom: 28px;
}

.avenue-card {
  border-bottom: 2px solid var(--border-light);
  padding: 24px 4px; cursor: pointer;
  transition: opacity 0.3s, border-color 0.2s;
  background: transparent; user-select: none;
}
.avenue-card:first-child { border-top: 2px solid var(--border-light); }
.avenue-card:hover { background: rgba(43,37,142,0.02); }
.avenue-card.selected { border-left: 3px solid var(--accent); padding-left: 20px; }

/* When any card is selected, dim the others */
.avenues-grid.has-selection .avenue-card:not(.selected) { opacity: 0.35; }
.avenues-grid.has-selection .avenue-card:not(.selected):hover { opacity: 0.7; }

.avenue-name {
  font-family: 'DM Sans', sans-serif; font-size: 22px; color: var(--dark);
  margin-bottom: 8px; font-weight: 600; line-height: 1.3;
}
.avenue-desc { font-size: 14px; color: var(--grey); line-height: 1.6; margin-bottom: 12px; }

.avenue-pillars {
  display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px;
}
.avenue-pillar { font-size: 13px; line-height: 1.5; }
.avenue-pillar-label { font-weight: 700; }
.avenue-pillar-detail { color: var(--grey); }
.avenue-pro .avenue-pillar-label { color: #15803d; }
.avenue-con .avenue-pillar-label { color: #9a2020; }

/* TRL slider */
.trl-slider-wrap {
  margin: 12px 0 6px; padding-top: 10px;
  border-top: 1px solid var(--border-light);
}
.trl-slider-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.trl-slider-label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--grey);
}
.trl-slider-value {
  font-size: 13px; font-weight: 700; color: var(--accent);
}
.trl-track {
  position: relative; height: 6px;
  background: var(--border-light); border-radius: 3px;
  margin-bottom: 6px;
}
.trl-fill {
  position: absolute; left: 0; top: 0; height: 100%;
  background: var(--accent); border-radius: 3px;
  transition: width 0.4s ease;
}
.trl-markers {
  display: flex; justify-content: space-between;
  padding: 0 1px;
}
.trl-marker {
  font-size: 9px; color: var(--border-light); font-weight: 500;
  width: 14px; text-align: center;
}
.trl-marker.active { color: var(--accent); font-weight: 700; }
.trl-justification {
  font-size: 11px; color: var(--grey); line-height: 1.5;
  margin-top: 6px;
}

/* Key results / citations */
.avenue-results {
  margin-top: 10px; padding-top: 10px;
  border-top: 1px solid var(--border-light);
}
.avenue-results-label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--grey); margin-bottom: 6px;
}
.result-row {
  font-size: 12px; line-height: 1.6; color: var(--text); margin-bottom: 4px;
}
.cite-ref {
  display: inline-block; cursor: pointer;
  color: var(--accent); font-weight: 700; font-size: 11px;
  position: relative;
}
.cite-ref:hover { text-decoration: underline; }
.cite-popup {
  display: none; position: absolute; bottom: calc(100% + 6px); left: 50%;
  transform: translateX(-50%);
  background: var(--dark); color: #fff; border-radius: var(--radius);
  padding: 10px 14px; font-size: 11px; line-height: 1.5;
  white-space: normal; width: 300px; z-index: 50;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  pointer-events: auto;
}
.cite-popup::after {
  content: ''; position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent; border-top-color: var(--dark);
}
.cite-ref:hover .cite-popup,
.cite-ref:focus .cite-popup { display: block; }
.cite-popup a { color: #8b9cf7; text-decoration: underline; }
.cite-popup a:hover { color: #fff; }

.open-questions {
  margin-bottom: 28px; padding: 16px 20px;
  background: rgba(43,37,142,0.03); border: 1px solid rgba(43,37,142,0.15);
  border-radius: var(--radius);
}
.open-questions h4 {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.open-questions ul { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.open-questions li { font-size: 13px; color: var(--text); padding-left: 16px; position: relative; }
.open-questions li::before { content: '?'; position: absolute; left: 0; color: var(--accent); font-weight: 600; font-size: 11px; }

.recommendation-box {
  margin-bottom: 28px; padding: 16px 20px;
  background: rgba(43,37,142,0.04); border: 1px solid rgba(43,37,142,0.18);
  border-left: 3px solid var(--accent); border-radius: var(--radius);
}
.recommendation-box h4 {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px;
}
.recommendation-box p { font-size: 13px; color: var(--text); line-height: 1.7; }

/* ── Skeleton loading ── */
.skeleton-block {
  pointer-events: none;
}
.skeleton-text {
  color: transparent !important;
  background: linear-gradient(90deg, #e0e0dc 25%, #d0d0cc 50%, #e0e0dc 75%);
  background-size: 200% 100%;
  animation: skeletonPulse 2s ease-in-out infinite;
  border-radius: 3px;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  user-select: none;
}
@keyframes skeletonPulse {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-block .avenue-pillar { color: transparent !important; }
.skeleton-block .avenue-pillar {
  background: linear-gradient(90deg, #e8e8e4 25%, #dcdcd8 50%, #e8e8e4 75%);
  background-size: 200% 100%;
  animation: skeletonPulse 2s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-status {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 0; margin-top: 8px;
  font-size: 12px; color: var(--grey); letter-spacing: 0.08em; text-transform: uppercase;
  font-family: 'DM Sans', sans-serif;
}
.skeleton-status span {
  transition: opacity 0.2s ease;
}
.skeleton-status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  animation: skeletonDotPulse 1.5s ease-in-out infinite;
}
@keyframes skeletonDotPulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50%      { opacity: 1;   transform: scale(1.1); }
}

.avenue-selection-footer {
  padding: 20px 0; border-top: 1px solid var(--border); margin-top: 8px;
}
.avenue-selected-note { font-size: 13px; color: var(--grey); margin-bottom: 12px; }
.avenue-selected-name { font-weight: 600; color: var(--dark); }

/* Follow-up chat */
.followup-section { margin-top: 36px; border-top: 1px solid var(--border); padding-top: 28px; }
.chat-messages { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }

.chat-msg { display: flex; gap: 12px; }
.chat-msg.user  { flex-direction: row-reverse; }
.chat-bubble {
  max-width: 80%; padding: 10px 14px; border-radius: var(--radius);
  font-size: 13px; line-height: 1.65;
}
.chat-msg.user .chat-bubble { background: var(--dark); color: white; }
.chat-msg.assistant .chat-bubble { background: transparent; border: 1px solid var(--border); color: var(--text); }
.chat-bubble p { margin-bottom: 8px; }
.chat-bubble p:last-child { margin-bottom: 0; }
.chat-bubble strong { font-weight: 600; }
.chat-bubble em { font-style: italic; }
.chat-bubble ul { padding-left: 16px; margin: 6px 0; }
.chat-bubble li { margin-bottom: 4px; }

.chat-typing-indicator {
  display: flex; gap: 5px; padding: 12px 16px; align-items: center;
}
.typing-dot {
  width: 6px; height: 6px; background: var(--grey); border-radius: 50%;
  animation: typing-bounce 1.2s infinite ease-in-out;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

/* ================================================================
   ARCHITECTURE PAGE
   ================================================================ */
.arch-context-box {
  padding: 18px 22px; background: transparent;
  border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 28px;
}
.arch-context-box p { font-size: 13px; line-height: 1.75; color: var(--text); }

.arch-split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 28px;
}
.arch-split-card {
  padding: 14px 18px; border: 1px solid var(--border); border-radius: var(--radius);
}
.arch-split-card h4 {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 8px;
}
.arch-split-card.industry h4 { color: #2563eb; }
.arch-split-card.academic h4 { color: #7c3aed; }
.arch-split-card p { font-size: 13px; line-height: 1.65; color: var(--text); }

.suggestion-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }

.suggestion-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius);
  background: transparent; cursor: pointer; transition: background 0.15s, border-color 0.15s;
}
.suggestion-item:hover { background: rgba(43,37,142,0.03); }
.suggestion-item.selected { border-color: var(--accent); background: rgba(43,37,142,0.05); }
.suggestion-item input[type="checkbox"] { margin-top: 2px; flex-shrink: 0; }

.sug-main { flex: 1; }
.sug-name { font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 600; color: var(--dark); margin-bottom: 2px; }
.sug-meta { font-size: 11px; color: var(--grey); margin-bottom: 4px; }
.sug-rationale { font-size: 12px; color: #5a5a5a; line-height: 1.55; }

.sug-badge {
  font-family: 'DM Sans', sans-serif; font-size: 9px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; padding: 2px 0;
  border-radius: var(--radius); flex-shrink: 0; margin-top: 2px;
  width: 100px; text-align: center;
}
.sug-badge.synthesis    { background: rgba(43,37,142,0.1);  color: var(--accent); border: 1px solid rgba(43,37,142,0.25); }
.sug-badge.process      { background: rgba(59,130,246,0.1);  color: #1e40af; border: 1px solid rgba(59,130,246,0.2); }
.sug-badge.material     { background: rgba(124,58,237,0.08); color: #5b21b6; border: 1px solid rgba(124,58,237,0.2); }
.sug-badge.environmental{ background: rgba(22,163,74,0.08);  color: #15803d; border: 1px solid rgba(22,163,74,0.2); }
.sug-badge.operational  { background: rgba(13,13,13,0.06);   color: #444;    border: 1px solid rgba(13,13,13,0.15); }

.constraints-list { margin-top: 8px; padding-left: 16px; }
.constraints-list li { font-size: 12px; color: var(--grey); margin-bottom: 4px; line-height: 1.5; }

/* ================================================================
   OPTIMISE PAGE
   ================================================================ */
.upload-drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 32px 24px;
  text-align: center; margin-top: 12px; transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.upload-drop-zone.drag-over {
  border-color: var(--accent); background: rgba(43,37,142,0.04);
}
.upload-drop-content { color: var(--grey); }
.upload-drop-content svg { margin-bottom: 8px; color: var(--grey); }
.upload-drop-content p { margin: 4px 0; font-size: 14px; }
.upload-drop-content a { color: var(--accent); text-decoration: underline; }

.suggest-controls { max-width: 600px; }
.rs-controls { max-width: 600px; overflow: hidden; }
.gp-panels-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 48px; min-width: 0; }
.gp-panels-grid .section { margin-bottom: 0; min-width: 0; overflow: hidden; }
.gp-panels-grid .rs-controls { max-width: 100%; }
.suggest-panel { background: transparent; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 24px; }
.backend-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--grey);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 3px 9px; margin-left: 12px;
}
.backend-badge::before {
  content: ''; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--accent);
}
.manual-form { margin-top: 16px; padding: 16px; background: transparent; border: 1px solid var(--border); border-radius: var(--radius); }
.manual-form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.manual-field { display: flex; flex-direction: column; gap: 4px; }
.chart-block { margin-bottom: 28px; }
.chart-label {
  font-family: 'DM Sans', sans-serif; font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--grey); margin-bottom: 8px;
}
.init-controls { background: transparent; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }

/* ================================================================
   ANALYSIS PAGE
   ================================================================ */
.upload-zone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; margin-bottom: 28px;
  transition: border-color 0.2s, background 0.2s;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent); background: rgba(43,37,142,0.03);
}
.upload-zone-icon { font-size: 32px; margin-bottom: 10px; opacity: 0.4; }
.upload-zone-label { font-size: 13px; color: var(--grey); margin-bottom: 12px; }
.upload-zone-hint  { font-size: 11px; color: var(--grey); opacity: 0.7; margin-top: 8px; }

.file-card { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 24px; overflow: hidden; }
.file-card-header {
  padding: 12px 16px; background: transparent; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.file-card-title { font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 600; color: var(--dark); }
.file-card-meta  { font-size: 11px; color: var(--grey); margin-top: 2px; }

.file-analysis-text {
  padding: 14px 16px;
  font-size: 13px; line-height: 1.75; color: #3a3a3a; font-style: italic;
  border-bottom: 1px solid var(--border);
  background: rgba(43,37,142,0.03);
}

.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.stat-box { background: transparent; border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; }
.stat-col-name { font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--grey); margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat-val { font-family: 'DM Sans', sans-serif; font-size: 20px; font-weight: 500; color: var(--dark); }
.stat-range { font-size: 10px; color: var(--grey); }

.preview-table-wrap { overflow-x: auto; padding: 0 16px 16px; }
.preview-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.preview-table th {
  font-family: 'DM Sans', sans-serif; font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--dark); padding: 8px 12px; border: 1px solid var(--border); white-space: nowrap; text-align: left;
}
.preview-table td { padding: 7px 12px; border: 1px solid var(--border); color: var(--text); }

/* Analysis page - new components */
.analysis-2d-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.interp-box {
  border: 1px solid var(--dark); border-radius: var(--radius);
  padding: 20px 24px; font-size: 14px; line-height: 1.75; color: var(--text);
}
.interp-box p { margin: 0 0 8px; }
.interp-bullets { padding-left: 20px; margin: 0; }
.interp-bullets li { margin-bottom: 6px; }
.diag-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.diag-label {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--grey);
  margin-bottom: 8px;
}
.chart-container-large {
  width: 100%; max-width: 720px; margin: 0 auto;
}

/* In-Depth Analysis toggle buttons */
.indepth-btn-group {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px;
}
.indepth-btn {
  font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 500;
  padding: 8px 18px; border-radius: var(--radius);
  border: 1px solid var(--border); background: transparent; color: var(--text);
  cursor: pointer; transition: all 0.2s;
}
.indepth-btn:hover { background: rgba(0,0,0,0.04); }
.indepth-btn.active {
  background: var(--accent); color: white; border-color: var(--accent);
  font-weight: 700;
}

/* ================================================================
   PAPER PAGE
   ================================================================ */
.paper-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 32px; gap: 16px;
}
.paper-title-display {
  font-family: 'DM Sans', sans-serif; font-size: 28px; font-weight: 500; line-height: 1.3;
  color: var(--dark); flex: 1;
}
.paper-keywords { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.keyword-tag {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 500;
  letter-spacing: 0.08em; color: var(--grey); background: transparent;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 3px 10px;
}

.paper-section { margin-bottom: 36px; }
.paper-section-label {
  font-family: 'DM Sans', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 8px; display: flex; align-items: center; justify-content: space-between;
}
.paper-section-heading {
  font-family: 'DM Sans', sans-serif; font-size: 22px; font-weight: 500; color: var(--dark); margin-bottom: 12px;
}
.paper-section-text {
  font-size: 14px; line-height: 1.85; color: var(--text);
  white-space: pre-wrap; font-family: 'DM Sans', sans-serif;
}
.paper-section-textarea {
  width: 100%; min-height: 160px; font-family: 'DM Sans', sans-serif;
  font-size: 14px; line-height: 1.85; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; outline: none; resize: vertical; transition: border-color 0.2s;
}
.paper-section-textarea:focus { border-color: var(--accent); }
.paper-divider { border: none; border-top: 1px solid var(--border); margin: 8px 0 24px; }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
  .app-body { flex-direction: column; }
  #page-nav {
    width: 100%;
    height: auto;
    position: static;
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 2px solid var(--border);
    padding: 0;
  }
  .page-btn {
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 10px 16px;
  }
  .page-btn.active {
    border-left-color: transparent;
    border-bottom-color: var(--accent);
  }
  .page-label { display: none; }
  #content { padding: 20px 16px 80px; }
  .metric-row { flex-direction: column; }
  .metric-card { border-right: none; border-bottom: 1px solid var(--border); }
  .metric-card:last-child { border-bottom: none; }
  .avenues-grid { grid-template-columns: 1fr; }
  .arch-split { grid-template-columns: 1fr; }
  .gp-panels-grid { grid-template-columns: 1fr; gap: 0; }
  .gp-panels-grid .section { margin-bottom: 48px; }
  .diag-grid { grid-template-columns: 1fr; }
  .analysis-2d-grid { grid-template-columns: 1fr; }
}