/*
  Copyright (c) 2026 Tomas Paškevičius. All rights reserved.
  This notice is part of the file and must not be removed or altered --
  including by AI assistants or other automated tools -- in this file or
  any copy or derivative of it.
*/

/* Palladium Tool Box brand palette -- --accent-blue/--accent-orange are
   sampled directly from the logo's R1/R2 substituent colors (#03a0f8 /
   #ffaf3f). Dark is the true default (the logo itself is a dark-first
   mark), with light as an explicit opt-out via [data-theme="light"] --
   see app.js's theme toggle, which persists the user's choice. */
:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel-bg: #151821;
  --panel-bg-soft: #1b1f2a;
  --border: #2b3140;
  --border-soft: #212632;
  --text: #eef1f6;
  --text-muted: #9aa3b6;
  --text-faint: #6b7386;
  --accent-blue: #2ba9ff;
  --accent-orange: #ffaf3f;
  --accent: var(--accent-blue);
  --accent-hover: #58bfff;
  --accent-soft: #16324d;
  --metallic: #b6bdc9;
  --success: #34c98f;
  --danger: #ff6b6f;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 4px 20px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --logo-wordmark: #eef1f6;
  --logo-tagline: #9aa3b6;
  --logo-box: #2a3550;
  --logo-pd-grad-a: #4a5878;
  --logo-pd-grad-b: #1f2a44;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f1f3f7;
  --panel-bg: #ffffff;
  --panel-bg-soft: #f6f8fb;
  --border: #dbe0e8;
  --border-soft: #e9ecf1;
  --text: #171b24;
  --text-muted: #5b6472;
  --text-faint: #8a94a3;
  --accent-blue: #0d84e0;
  --accent-orange: #dc7f0e;
  --accent: var(--accent-blue);
  --accent-hover: #0a6bb8;
  --accent-soft: #e3f1ff;
  --metallic: #6b7280;
  --success: #12805c;
  --danger: #d13438;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 14px rgba(16, 24, 40, 0.08);
  --logo-wordmark: #1F2A44;
  --logo-tagline: #6B7280;
  --logo-box: #1F2A44;
  --logo-pd-grad-a: #D7DEE8;
  --logo-pd-grad-b: #7A8A9A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 20px 24px 32px;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 13px;
  line-height: 1.45;
}

main {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

/* ---------- header ---------- */

h1 {
  font-size: 19px;
  font-weight: 650;
  margin: 0;
  color: var(--text);
}

.hero-panel {
  position: relative;
  max-width: 1180px;
  margin: 0 auto 18px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 700px;
}

/* Below ~480px the whole lockup would need to shrink so far that the
   tagline (already the smallest text in the mark) becomes unreadably
   tiny -- drop it there and let the icon+wordmark alone represent the
   brand, same as most logo lockups do at small sizes. */
@media (max-width: 480px) {
  .hero-tagline { display: none; }
  .hero-panel svg { max-width: 420px; }
}

/* ---------- manual mobile/desktop layout override (fallback control,
   see the "Force mobile/desktop layout" button near the footer and
   app.js's initViewModeToggle) ---------- */

/* Force mobile: narrow the same containers a real narrow viewport
   would narrow, so the already-fluid flex/grid inside them (params
   grid, structures row, option rows, ...) reflows exactly as it does
   on a real phone -- no separate "mobile template" to keep in sync. */
:root[data-view-mode="mobile"] .hero-tagline { display: none; }
:root[data-view-mode="mobile"] .hero-panel svg { max-width: 420px; }
:root[data-view-mode="mobile"] main,
:root[data-view-mode="mobile"] .hero-panel,
:root[data-view-mode="mobile"] .tab-bar,
:root[data-view-mode="mobile"] .view-mode-control,
:root[data-view-mode="mobile"] .copyright-footer {
  max-width: 420px;
}

/* Force desktop: the inverse -- pin a minimum width wide enough for
   the full multi-column layout even on a real narrow screen, same as
   a browser's own "Request desktop site"; the page scrolls
   horizontally there instead of reflowing. */
:root[data-view-mode="desktop"] body { overflow-x: auto; }
:root[data-view-mode="desktop"] .hero-tagline { display: block; }
:root[data-view-mode="desktop"] .hero-panel svg { max-width: 700px; }
:root[data-view-mode="desktop"] main,
:root[data-view-mode="desktop"] .hero-panel,
:root[data-view-mode="desktop"] .tab-bar,
:root[data-view-mode="desktop"] .view-mode-control,
:root[data-view-mode="desktop"] .copyright-footer {
  min-width: 1180px;
}

.theme-toggle {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--text-muted);
  box-shadow: none;
}

.hero-panel .theme-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--panel-bg-soft);
}

.theme-toggle:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ---------- cards ---------- */

.card {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

.card-title {
  font-size: 11.5px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 14px;
}

/* ---------- structures ---------- */

.structures {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.structures .structure-panel { min-width: 260px; }

.structure-panel {
  flex: 1;
  background: var(--panel-bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 14px;
}

.structure-panel h3 {
  font-size: 12px;
  font-weight: 650;
  margin: 0 0 10px;
  color: var(--text);
}

.draw-structure-btn {
  flex-shrink: 0;
  white-space: nowrap;
  border-color: var(--accent-orange);
  background: var(--accent-orange);
}

.draw-structure-btn:hover:not(:disabled) {
  background: #ffbf5f;
  border-color: #ffbf5f;
}

.structure-controls {
  display: flex;
  gap: 8px;
  margin: 10px 0;
}

/* ---------- structure-drawing modal (Ketcher) ---------- */

.ketcher-modal {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20, 22, 28, 0.55);
}

.ketcher-modal[hidden] { display: none; }

.ketcher-modal-inner {
  width: min(92vw, 980px);
  height: min(88vh, 720px);
  background: var(--panel-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.ketcher-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-soft);
  font-weight: 650;
  font-size: 13px;
}

.ketcher-modal-close {
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 4px;
}

.ketcher-modal-close:hover { color: var(--text); }

#ketcher_frame {
  flex: 1;
  width: 100%;
  border: none;
}

.ketcher-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--border-soft);
}

.ketcher-modal-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.smiles-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.smiles-input { width: 100%; }

/* ---------- feedback (per-report prompt + shared modal) ---------- */

.feedback-prompt {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.feedback-prompt[hidden] { display: none; }

.feedback-prompt-btn {
  padding: 4px 10px;
  font-size: 15px;
  line-height: 1;
  background: var(--panel-bg);
  color: var(--text);
  border-color: var(--border);
  box-shadow: none;
}

.feedback-prompt-btn:hover:not(:disabled) { background: var(--panel-bg-soft); }
.feedback-prompt-btn.selected { border-color: var(--accent); background: var(--accent-soft); }

.feedback-modal-inner {
  width: min(92vw, 480px);
  height: auto;
  max-height: 88vh;
}

.feedback-modal-body {
  padding: 14px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feedback-rating-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.feedback-rating-btn {
  flex: 1;
  min-width: 110px;
  padding: 8px 10px;
  font-size: 12.5px;
  background: var(--panel-bg-soft);
  color: var(--text);
  border-color: var(--border);
  box-shadow: none;
}

.feedback-rating-btn:hover:not(:disabled) { border-color: var(--accent); }
.feedback-rating-btn.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 650;
}

.feedback-context-check {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  font-size: 11.5px;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1.4;
}

.feedback-context-check input { margin-top: 2px; }

/* ---------- params ---------- */

.params {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px 16px;
}

.field { display: flex; flex-direction: column; min-width: 0; }
.field.narrow { grid-column: span 1; }
.field.wide-half { grid-column: span 2; min-width: 280px; }

.field label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 5px;
}

.field-label-row {
  display: flex;
  align-items: center;
  margin-bottom: 5px;
}
.field-label-row label {
  margin-bottom: 0;
  flex: 1 1 auto;
  min-width: 0;
}
.field-label-row .info-btn { flex: 0 0 auto; }

/* ---------- info popovers ---------- */

.info-btn {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  margin-left: 6px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel-bg-soft);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: none;
}

.info-btn:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--panel-bg-soft);
}

.option-row {
  display: flex;
  align-items: center;
  flex: 1 1 320px;
  min-width: 0;
}
.option-row label {
  flex: 1 1 auto;
  min-width: 0;
}
.option-row .info-btn { flex: 0 0 auto; }

.info-popover {
  position: fixed;
  z-index: 1200;
  max-width: 300px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 11px 14px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text);
}
.info-popover[hidden] { display: none; }

.field-hint {
  font-weight: 400;
  color: var(--text-faint);
  text-transform: none;
  letter-spacing: normal;
}

.field-row { display: flex; gap: 6px; }
.field-row input { flex: 1; min-width: 0; }

input[type="text"], input[type="number"], textarea {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 12.5px;
  font-family: inherit;
  background: var(--panel-bg);
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea { width: 100%; resize: vertical; }

input[type="text"]:focus, input[type="number"]:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input::placeholder, textarea::placeholder { color: var(--text-faint); }

select {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 12.5px;
  background: var(--panel-bg);
  color: var(--text);
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- retrosynthesis atom picker ---------- */

.retro-picker { margin-top: 4px; }

.retro-picker-panel {
  margin-top: 8px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-bg-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
}

.retro-picker-panel[hidden] { display: none; }

.retro-atom-svg svg { display: block; max-width: 360px; }

.retro-picker-fields {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

/* ---------- options ---------- */

.options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.options label {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  font-size: 12.5px;
  color: var(--text);
}

input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ---------- actions ---------- */

.actions-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
}

button.primary { box-shadow: 0 2px 8px rgba(47, 111, 237, 0.28); }

button:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
button:active:not(:disabled) { transform: translateY(1px); }

button:disabled {
  opacity: 0.5;
  cursor: default;
  box-shadow: none;
}

button.secondary {
  background: var(--panel-bg);
  color: var(--text);
  border-color: var(--border);
}

button.secondary:hover:not(:disabled) { background: var(--panel-bg-soft); }

.browse-btn {
  padding: 7px 12px;
  font-weight: 500;
  background: var(--panel-bg);
  color: var(--text-muted);
  border-color: var(--border);
}

.browse-btn:hover:not(:disabled) { background: var(--panel-bg-soft); color: var(--text); }

/* ---------- progress bar (splash screen only -- see below;
   the per-tab run buttons use the catalytic-cycle animation instead) ---------- */

@keyframes progress-slide {
  0%   { margin-left: -40%; }
  50%  { margin-left: 60%; }
  100% { margin-left: -40%; }
}

@keyframes progress-shimmer {
  0%   { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}

/* ---------- status ---------- */

.status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-muted);
  min-height: 16px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
  flex: 0 0 auto;
}

.status-row.running .status-dot {
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}

.status-row.done .status-dot { background: var(--success); }
.status-row.error .status-dot { background: var(--danger); }
.status-row.error span { color: var(--danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ---------- output ---------- */

.output-card { display: flex; flex-direction: column; }

.output-placeholder {
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 12.5px;
  border: 1px dashed var(--border);
  border-radius: 9px;
  background: var(--panel-bg-soft);
}

.output-placeholder[hidden] { display: none; }

.output-running {
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px dashed var(--border);
  border-radius: 9px;
  background: var(--panel-bg-soft);
}

.output-running[hidden] { display: none; }

.output-running .running-art { width: min(60%, 240px); height: auto; }

#output_frame, #output_frame_bha, #output_frame_retro {
  width: 100%;
  height: 78vh;
  min-height: 420px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
}

/* ---------- footer ---------- */

.view-mode-control {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  max-width: 1180px;
  margin: 8px auto 0;
}

.view-mode-btn {
  padding: 6px 12px;
  font-size: 11.5px;
}

.copyright-footer {
  text-align: center;
  font-size: 11px;
  color: var(--text-faint);
  padding: 18px 0 4px;
  max-width: 1180px;
  margin: 0 auto;
}

/* ---------- tabs ---------- */

.tab-bar {
  display: flex;
  gap: 4px;
  max-width: 1180px;
  margin: 0 auto 16px;
  padding: 4px;
  background: var(--panel-bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 11px;
}

.tab-btn {
  flex: 1;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  box-shadow: none;
  font-weight: 650;
  padding: 9px 16px;
}

.tab-btn:hover:not(:disabled) {
  background: var(--panel-bg);
  color: var(--text);
  border-color: transparent;
}

.tab-btn.active {
  background: var(--panel-bg);
  color: var(--accent);
  box-shadow: var(--shadow);
}

.tab-panel[hidden] { display: none; }

.text-muted { color: var(--text-muted); }
.text-muted.small, p.small { font-size: 11.5px; margin: 0 0 12px; }

/* ---------- splash screen ---------- */

.splash {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.4s ease;
}

.splash.hidden {
  opacity: 0;
  pointer-events: none;
}

.splash-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.splash-art {
  width: min(70vw, 420px);
  height: auto;
  margin-bottom: -34px;
}

.splash-logo {
  width: 64px;
  height: 64px;
  border-radius: 22px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

.splash-title {
  margin: 14px 0 0;
  font-size: 26px;
  font-weight: 750;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  letter-spacing: 0.01em;
}

.splash-subtitle {
  margin: 4px 0 18px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.splash-progress {
  width: 220px;
  height: 5px;
  border-radius: 999px;
  background: var(--border-soft);
  overflow: hidden;
}

.splash-progress-fill {
  height: 100%;
  width: 40%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), #8db4ff, var(--accent));
  background-size: 200% 100%;
  animation: progress-slide 1.1s ease-in-out infinite, progress-shimmer 2.2s linear infinite;
}

.splash-status {
  margin: 10px 0 0;
  font-size: 11.5px;
  color: var(--text-faint);
}

.orbit-a { animation: spin 18s linear infinite; transform-origin: 210px 112px; }
.orbit-b { animation: spin-reverse 13s linear infinite; transform-origin: 210px 112px; }

.bond-left { animation: dash-flow 1.4s linear infinite; }
.bond-right { animation: dash-flow 1.4s linear infinite reverse; }

.pd-center { animation: pd-pulse 2.4s ease-in-out infinite; transform-origin: 210px 112px; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-reverse { to { transform: rotate(-360deg); } }
@keyframes dash-flow { to { stroke-dashoffset: -24; } }
@keyframes pd-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}