/* ==========================================================================
   Litmus — design system
   A library index-card system: cool paper ground, ink-blue type, a serif
   built for long-form reading paired with a technical sans for UI and data.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,500&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* ---- Light theme (paper) ---- */
  --paper: #f8f8f5;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-sunken: #f0f0eb;
  --ink: #1b1f2a;
  --ink-soft: #454b58;
  --muted: #6b7280;
  --faint: #9aa0ac;
  --border: #dfe0da;
  --border-strong: #c7c9c2;
  --hairline: #e8e8e3;

  --accent: #2e4374;
  --accent-ink: #ffffff;
  --accent-soft: #e8ecf6;
  --accent-soft-ink: #2e4374;

  --mark: #a5321f;
  --mark-soft: #f8e6e2;
  --mark-soft-ink: #a5321f;

  --success: #2f6b4f;
  --success-soft: #e3f0e8;
  --warning: #8a5a17;
  --warning-soft: #f7ecd6;
  --danger: #a5321f;
  --danger-soft: #f8e6e2;

  --shadow-color: 220 20% 20%;
  --shadow-sm: 0 1px 2px hsl(var(--shadow-color) / 0.06), 0 1px 1px hsl(var(--shadow-color) / 0.04);
  --shadow-md: 0 6px 16px hsl(var(--shadow-color) / 0.08), 0 2px 6px hsl(var(--shadow-color) / 0.05);
  --shadow-lg: 0 20px 48px hsl(var(--shadow-color) / 0.16), 0 6px 16px hsl(var(--shadow-color) / 0.08);

  --font-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-body: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14161b;
    --surface: #1b1e26;
    --surface-raised: #21242e;
    --surface-sunken: #101216;
    --ink: #eceef2;
    --ink-soft: #c2c6d0;
    --muted: #8b90a0;
    --faint: #676c7c;
    --border: #2d313d;
    --border-strong: #3c4150;
    --hairline: #262a34;

    --accent: #7c93d1;
    --accent-ink: #0f1420;
    --accent-soft: #232c45;
    --accent-soft-ink: #a9bae4;

    --mark: #e08069;
    --mark-soft: #3a2420;
    --mark-soft-ink: #eba28d;

    --success: #7fc39e;
    --success-soft: #1c3128;
    --warning: #e0b567;
    --warning-soft: #3a2f16;
    --danger: #e08069;
    --danger-soft: #3a2420;

    --shadow-color: 220 60% 2%;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #14161b;
  --surface: #1b1e26;
  --surface-raised: #21242e;
  --surface-sunken: #101216;
  --ink: #eceef2;
  --ink-soft: #c2c6d0;
  --muted: #8b90a0;
  --faint: #676c7c;
  --border: #2d313d;
  --border-strong: #3c4150;
  --hairline: #262a34;

  --accent: #7c93d1;
  --accent-ink: #0f1420;
  --accent-soft: #232c45;
  --accent-soft-ink: #a9bae4;

  --mark: #e08069;
  --mark-soft: #3a2420;
  --mark-soft-ink: #eba28d;

  --success: #7fc39e;
  --success-soft: #1c3128;
  --warning: #e0b567;
  --warning-soft: #3a2f16;
  --danger: #e08069;
  --danger-soft: #3a2420;

  --shadow-color: 220 60% 2%;
  color-scheme: dark;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }
::selection { background: var(--accent-soft); color: var(--accent-soft-ink); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
  text-wrap: balance;
  color: var(--ink);
}
h1 { font-size: 1.75rem; font-weight: 500; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.08rem; }
h4 {
  font-family: var(--font-body);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}
p { margin: 0 0 0.75em; }
p:last-child { margin-bottom: 0; }

.tabular { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }

/* ---- Scrollbars (subtle, cross-theme) ---- */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 99px; }
*::-webkit-scrollbar-track { background: transparent; }

/* ---- Focus ---- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- Layout primitives ---- */
.overflow-x { overflow-x: auto; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.55em 1em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease, transform 80ms ease;
  white-space: nowrap;
  line-height: 1.2;
}
.btn:hover { border-color: var(--ink-soft); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { filter: brightness(1.08); border-color: var(--accent); }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-soft);
}
.btn-ghost:hover { background: var(--surface-sunken); border-color: transparent; color: var(--ink); }

.btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.btn-danger:hover { background: var(--danger-soft); }

.btn-sm { padding: 0.38em 0.75em; font-size: 0.78rem; }
.btn-icon { padding: 0.5em; width: 2.1em; height: 2.1em; }
.btn svg { width: 15px; height: 15px; flex: none; }

/* ==========================================================================
   Badges / pills / status
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.24em 0.62em;
  border-radius: 5px;
  line-height: 1.4;
  white-space: nowrap;
}
.badge-accent { background: var(--accent-soft); color: var(--accent-soft-ink); }
.badge-mark { background: var(--mark-soft); color: var(--mark-soft-ink); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-neutral { background: var(--surface-sunken); color: var(--ink-soft); border: 1px solid var(--border); }

.score-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3em;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.78rem;
  padding: 0.2em 0.55em 0.2em 0.5em;
  border-radius: 5px;
  border-left: 3px solid var(--score-color, var(--muted));
  background: var(--surface-sunken);
}
.score-chip .unit { font-size: 0.68em; color: var(--muted); font-family: var(--font-body); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  font-size: 0.74rem;
  font-weight: 500;
  padding: 0.22em 0.5em 0.22em 0.6em;
  border-radius: 99px;
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  color: var(--ink-soft);
  cursor: default;
}
.tag button {
  border: none;
  background: none;
  color: var(--faint);
  cursor: pointer;
  padding: 0;
  display: flex;
  line-height: 1;
}
.tag button:hover { color: var(--danger); }

/* ==========================================================================
   Forms
   ========================================================================== */
label.field-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.45em;
}
.field-hint { font-size: 0.78rem; color: var(--faint); margin-top: 0.4em; }

.paper-infographic-section {
  margin-top: 1rem;
}

.paper-infographic-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.paper-infographic-loading {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-sunken);
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.paper-infographic-image-shell {
  display: grid;
  gap: 1rem;
  padding: 0.35rem 0 0.2rem;
}

.paper-infographic-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem 0;
}

.paper-infographic-kicker {
  margin-bottom: 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.paper-infographic-heading {
  color: var(--accent);
}

.paper-infographic-score-badge {
  flex: 0 0 auto;
  min-width: 72px;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 700;
  text-align: center;
}

.paper-infographic-image-frame {
  padding: 0;
}

.paper-infographic-image-viewport {
  overflow: auto;
  padding: 0.3rem;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(248, 244, 236, 0.72) 0%, rgba(255, 255, 255, 0.92) 100%);
}

.paper-infographic-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transform-origin: top center;
  transition: transform 180ms ease;
}

.paper-infographic-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0 1rem;
}

.paper-infographic-visual-column {
  display: grid;
  gap: 0.75rem;
}

.paper-infographic-toolbar {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.paper-infographic-toolbar .btn {
  min-width: 56px;
}

.paper-infographic-toolbar .btn.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.paper-infographic-prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
  padding-left: 0.35rem;
}

.paper-infographic-prompt-head h5 {
  margin: 0;
}

.paper-infographic-dialog-strip {
  display: grid;
  gap: 0.75rem;
}

.paper-infographic-dialog {
  position: relative;
  max-width: 88%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(245,240,233,0.92) 100%);
  box-shadow: var(--shadow-sm);
}

.paper-infographic-dialog.left {
  justify-self: start;
  border-top-left-radius: 8px;
}

.paper-infographic-dialog.right {
  justify-self: end;
  border-top-right-radius: 8px;
  background: linear-gradient(180deg, rgba(232,236,246,0.95) 0%, rgba(255,255,255,0.98) 100%);
}

.paper-infographic-dialog.left::after,
.paper-infographic-dialog.right::after {
  content: "";
  position: absolute;
  bottom: -10px;
  width: 18px;
  height: 18px;
  background: inherit;
  border-bottom: 1px solid var(--border);
}

.paper-infographic-dialog.left::after {
  left: 18px;
  border-left: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.paper-infographic-dialog.right::after {
  right: 18px;
  border-right: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.paper-infographic-dialog-role {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.paper-infographic-dialog p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
}

.paper-infographic-image-frame {
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(246,240,231,0.92) 100%);
  box-shadow: var(--shadow-md);
}

.paper-infographic-storyboard {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  padding: 0;
}

.paper-infographic-story-card {
  border: 1px solid var(--border);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(245,240,233,0.92) 100%);
  padding: 1rem 1.05rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.paper-infographic-story-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent) 0%, #d7a24d 100%);
}

.paper-infographic-story-card h5 {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.9rem;
  padding-left: 0.35rem;
}

.paper-infographic-story-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.55;
  padding-left: 0.35rem;
}

.paper-infographic-story-card--full {
  grid-column: 1 / -1;
}

.paper-infographic-pre {
  margin: 0;
  padding-left: 0.35rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--ink-soft);
  font-family: var(--font-mono);
}

.paper-infographic-caption {
  padding: 0 1rem 0.2rem;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.45;
}

@media (max-width: 720px) {
  .paper-infographic-header {
    display: grid;
  }

  .paper-infographic-layout {
    padding: 0 1rem;
  }

  .paper-infographic-dialog {
    max-width: 100%;
  }

  .paper-infographic-prompt-head {
    align-items: flex-start;
    flex-direction: column;
  }
}

input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="submit"]):not([type="button"]):not([type="reset"]):not([type="color"]),
select,
textarea {
  width: 100%;
  padding: 0.65em 0.8em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
}
textarea { min-height: 100px; resize: vertical; line-height: 1.5; font-family: var(--font-mono); font-size: 0.84rem; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
input::placeholder, textarea::placeholder { color: var(--faint); }

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236b7280' stroke-width='1.5' fill='none' fill-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8em center;
  padding-right: 2em;
}

/* ==========================================================================
   Cards / surfaces
   ========================================================================== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Toasts
   ========================================================================== */
#toastHost {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: min(360px, calc(100vw - 40px));
}
.toast {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: 0.75em 0.9em;
  font-size: 0.85rem;
  color: var(--ink);
  animation: toast-in 180ms ease;
}
.toast.error { border-left-color: var(--danger); }
.toast.success { border-left-color: var(--success); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Loading
   ========================================================================== */
.spinner {
  width: 1em; height: 1em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ==========================================================================
   Theme toggle
   ========================================================================== */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1em; height: 2.1em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
}
.user-menu { display: flex; align-items: center; gap: 0.5rem; }
.user-menu-name { font-size: 0.82rem; color: var(--muted); padding: 0 0.15rem; }
@media (max-width: 640px) { .user-menu-name { display: none; } }

.theme-toggle:hover { color: var(--ink); border-color: var(--ink-soft); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-moon { display: none; }
.theme-toggle[data-mode="dark"] .icon-sun { display: none; }
.theme-toggle[data-mode="dark"] .icon-moon { display: block; }

.research-question-builder {
  display: grid;
  gap: 0.65rem;
}

.research-question-list {
  display: grid;
  gap: 0.45rem;
}

.research-question-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface-sunken);
  color: var(--ink);
  font-size: 0.86rem;
  line-height: 1.4;
}

.research-question-row span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.keyword-preview {
  min-height: 44px;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-soft-ink);
  font-size: 0.86rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

@media (max-width: 900px) {
  html,
  body {
    max-width: 100%;
    overflow-x: hidden;
  }

  body {
    font-size: 14px;
  }

  input,
  select,
  textarea,
  button {
    font-size: 16px;
  }

  .btn {
    min-height: 42px;
    justify-content: center;
  }

  .card,
  .panel-card,
  .settings-card,
  .form-card {
    border-radius: 18px;
  }

  .toast-host,
  #toastHost {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
    max-width: none;
  }

  .modal-backdrop {
    padding: 12px;
    align-items: stretch;
  }

  .modal-card {
    width: 100%;
    max-width: none;
    max-height: calc(100vh - 24px);
    overflow: auto;
    border-radius: 20px;
  }

  .modal-head,
  .modal-header,
  .drawer-head {
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--surface, #fff);
  }

  .modal-head .btn-icon,
  .modal-header .btn-icon,
  .drawer-head .btn-icon,
  .modal-close,
  .close-modal,
  [data-modal-close] {
    display: inline-flex !important;
    width: 42px;
    height: 42px;
    min-width: 42px;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    opacity: 1 !important;
    visibility: visible !important;
    color: var(--ink, #111827);
    background: var(--surface, #fff);
    border: 1px solid var(--border, #d8dee8);
    border-radius: 12px;
  }

  .research-question-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }

  .research-question-row .btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .btn {
    width: 100%;
  }

  .modal-head,
  .modal-header,
  .drawer-head {
    align-items: center;
    gap: 0.75rem;
  }

  .modal-head h3,
  .modal-header h3,
  .drawer-head h3,
  .drawer-head h4 {
    min-width: 0;
    flex: 1 1 auto;
    overflow-wrap: anywhere;
  }

  .form-actions,
  .actions-row,
  .button-row {
    flex-direction: column;
    align-items: stretch;
  }

  .keyword-preview {
    padding: 0.85rem;
  }
}