/* =========================================================
   THEME TOKENS
   Default = "dim" (dark). Add data-theme="warm" on <html>
   for the warm off-white alternative.
   ========================================================= */
:root {
  /* Brand accent (same in both themes, slightly different lightness) */
  --accent: #7c8ae6;
  --accent-strong: #9aa6f0;
  --accent-soft: rgba(124, 138, 230, 0.18);

  /* Dim / dark surfaces */
  --bg: #0f172a;
  --bg-grad: radial-gradient(1200px 600px at 10% -10%, #1a2340 0%, #0f172a 55%) fixed;
  --panel: #1a2236;
  --panel-inset: #141c2e;
  --border: #283148;
  --border-strong: #3a4566;

  --text: #e6ebf5;
  --text-dim: #a6b0c5;
  --text-faint: #6e7a95;

  --chip-bg: #202a42;

  --success-bg: rgba(34, 197, 94, 0.12);
  --success-fg: #6ee7a8;
  --warn-bg: rgba(234, 179, 8, 0.12);
  --warn-fg: #f2c44a;
  --error-bg: rgba(239, 68, 68, 0.12);
  --error-fg: #ff8a8a;
  --info-bg: rgba(99, 132, 232, 0.15);
  --info-fg: #9fb3f5;

  --shadow-panel: 0 1px 0 rgba(255,255,255,0.03) inset, 0 10px 30px rgba(0,0,0,0.35);
  --shadow-hover: 0 6px 20px rgba(124,138,230,0.25);
}

[data-theme="warm"] {
  --accent: #5b6abf;
  --accent-strong: #4c5aa0;
  --accent-soft: rgba(91, 106, 191, 0.15);

  --bg: #f5f1ea;
  --bg-grad: radial-gradient(1200px 600px at 10% -10%, #fbf7ef 0%, #f0ead9 60%, #ebe3cf 100%) fixed;
  --panel: #ffffff;
  --panel-inset: #faf6ee;
  --border: #e8e0cf;
  --border-strong: #d6cbb2;

  --text: #2a2620;
  --text-dim: #6a6355;
  --text-faint: #a39a85;

  --chip-bg: #f0ead9;

  --success-bg: #e8f5ec;
  --success-fg: #2f7a49;
  --warn-bg: #fdf3d8;
  --warn-fg: #8a6a10;
  --error-bg: #fceceb;
  --error-fg: #b9342e;
  --info-bg: #eceffb;
  --info-fg: #3b4aa0;

  --shadow-panel: 0 1px 2px rgba(80,60,20,0.04), 0 8px 24px rgba(80,60,20,0.08);
  --shadow-hover: 0 6px 18px rgba(91,106,191,0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

html, body { background: var(--bg); }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-grad);
  color: var(--text);
  min-height: 100vh;
  padding: 28px 24px 40px;
  -webkit-font-smoothing: antialiased;
}

.shell { max-width: 1200px; margin: 0 auto; }

/* =========================================================
   TOP BAR — brand left, theme toggle right; stepper on the row below
   ========================================================= */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.2px;
}

.brand-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.brand-sub {
  color: var(--text-faint);
  font-weight: 400;
  font-size: 12px;
  margin-left: 6px;
}

.topbar-right { display: flex; justify-content: flex-end; align-items: center; gap: 8px; }

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 10px;
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.15s ease, border-color 0.15s ease, transform 0.2s ease;
}
.theme-toggle svg { width: 16px; height: 16px; display: block; }
.theme-toggle:hover {
  color: var(--accent-strong);
  border-color: var(--border-strong);
  transform: rotate(-15deg);
}
.theme-toggle:active { transform: scale(0.94); }

.subtitle {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
  margin: 0 auto 22px;
  max-width: 640px;
}

/* =========================================================
   3-COLUMN WORKSPACE
   ========================================================= */
.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(360px, 1.5fr) minmax(300px, 1fr);
  gap: 18px;
  align-items: start;
}

.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-panel);
  padding: 22px 22px 20px;
  display: flex;
  flex-direction: column;
  min-height: 380px;
}

/* Left accent bar on the active panel */
.panel::before {
  content: "";
  position: absolute;
  left: 14px; top: 22px;
  width: 3px; height: 16px;
  border-radius: 2px;
  background: var(--border);
}
.panel-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-faint);
  letter-spacing: 1.1px;
  text-transform: uppercase;
  margin: 0 0 14px 14px;
}

.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.panel-title-row .panel-title { margin-bottom: 0; }

.panel-upload { text-align: center; }

@media (max-width: 960px) {
  .workspace { grid-template-columns: 1fr; }
  .panel { min-height: auto; }
}

/* =========================================================
   DROP ZONE
   ========================================================= */
.drop-zone {
  border: 1.5px dashed var(--border-strong);
  border-radius: 12px;
  padding: 42px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 14px;
  background: var(--panel-inset);
}

.drop-zone:hover:not(.disabled),
.drop-zone.dragover:not(.disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop-zone.disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.drop-zone .icon {
  font-size: 28px;
  margin-bottom: 10px;
  display: block;
  color: var(--accent);
  opacity: 0.9;
}

.drop-zone p {
  color: var(--text-dim);
  font-size: 13px;
}

/* =========================================================
   FILE INFO + BUTTONS
   ========================================================= */
.file-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-dim);
  background: var(--panel-inset);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
}

.selected-wrap {
  margin-bottom: 14px;
  background: var(--panel-inset);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
}

.selected-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 220px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.selected-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
}

.selected-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selected-size {
  flex: 0 0 auto;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
}

.selected-remove {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-dim);
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
  line-height: 1;
  padding: 0;
}
.selected-remove:hover { border-color: var(--border-strong); color: var(--text); }

#clear-all {
  display: block;
  margin: 8px 0 0 auto;
}

.btn-small {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
  transition: all 0.15s;
  font-family: inherit;
}
.btn-small:hover:not(:disabled) { border-color: var(--border-strong); color: var(--text); }
.btn-small:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-small-primary {
  background: var(--accent);
  color: white;
  border: 1px solid var(--accent);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
}
.btn-small-primary:hover:not(:disabled) {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.2px;
  width: 100%;
}
.btn:hover:not(:disabled) {
  background: var(--accent-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}
.btn:disabled {
  background: var(--border);
  color: var(--text-faint);
  cursor: not-allowed;
}

.upload-hint {
  margin-top: 12px;
  font-size: 12px;
  color: var(--info-fg);
  background: var(--info-bg);
  border-radius: 8px;
  padding: 10px 12px;
  line-height: 1.5;
  text-align: left;
}

.upload-error {
  margin-top: 12px;
  font-size: 12px;
  color: var(--error-fg);
  background: var(--error-bg);
  border-radius: 8px;
  padding: 10px 12px;
  line-height: 1.5;
  text-align: left;
  word-break: break-word;
}

/* =========================================================
   LIBRARY (middle)
   ========================================================= */
.library-empty {
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
  padding: 48px 16px;
  background: var(--panel-inset);
  border: 1px dashed var(--border);
  border-radius: 10px;
  line-height: 1.6;
}

.library-row {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  background: var(--panel-inset);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s, background 0.15s;
  cursor: pointer;
}

.library-row:hover { border-color: var(--border-strong); }

.library-row.active {
  border-color: var(--accent);
  cursor: default;
}

.library-row.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.row-main { display: flex; flex-direction: column; gap: 4px; }

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

.row-filename {
  font-weight: 600;
  color: var(--text);
  font-size: 13px;
  word-break: break-all;
  flex: 1;
}

.row-meta {
  display: flex; gap: 10px; flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 11px;
}

.row-progress { margin-top: 4px; }

.row-progress-bar-container {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  height: 5px;
  overflow: hidden;
  margin-bottom: 4px;
}

.row-progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
}

.row-progress-message {
  font-size: 11px;
  color: var(--text-dim);
  margin: 0;
}

.row-error {
  margin: 0;
  font-size: 11px;
  color: var(--error-fg);
  background: var(--error-bg);
  padding: 5px 8px;
  border-radius: 5px;
}

.row-actions {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
  align-items: center;
}

.icon-btn {
  background: transparent;
  border: none;
  border-radius: 8px;
  padding: 6px;
  cursor: pointer;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  line-height: 0;
}

.icon-btn svg { width: 16px; height: 16px; display: block; }

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

.icon-btn:active:not(:disabled) { transform: scale(0.94); }
.icon-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.icon-btn.row-download:hover:not(:disabled) {
  background: var(--success-bg);
  color: var(--success-fg);
}

.bin-btn { color: var(--error-fg); }
.bin-btn:hover:not(:disabled) {
  background: var(--error-bg);
  color: var(--error-fg);
}

/* =========================================================
   STATUS CHIPS
   ========================================================= */
.status-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.status-done { background: var(--success-bg); color: var(--success-fg); }
.status-translating,
.status-extracting,
.status-injecting,
.status-validating,
.status-queued { background: var(--info-bg); color: var(--info-fg); }
.status-error { background: var(--error-bg); color: var(--error-fg); }
.status-incomplete { background: var(--warn-bg); color: var(--warn-fg); }
.status-pending { background: var(--chip-bg); color: var(--text-faint); }

.lang-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.4px;
  background: var(--chip-bg);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* =========================================================
   LANGUAGE PAIR SELECTOR (upload panel)
   ========================================================= */
.lang-pair {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
}

.lang-field {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  flex: 1 1 0;
  max-width: 160px;
}

.lang-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-faint);
}

/* Native select is hidden — kept only so FormData carries its value. */
.lang-select-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  border: 0;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Custom dropdown wrapper */
.lang-dd {
  position: relative;
  width: 100%;
}

.lang-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: var(--panel-inset);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  text-align: left;
}

.lang-trigger:hover { border-color: var(--border-strong); }

.lang-dd.open .lang-trigger {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.lang-chev {
  width: 10px;
  height: 7px;
  flex: 0 0 auto;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8' fill='none' stroke='%23888' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'><polyline points='1 1.5 6 6.5 11 1.5'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform 0.15s ease;
}

.lang-dd.open .lang-chev { transform: rotate(180deg); }

.lang-options {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: var(--panel-bg, var(--panel-inset));
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  z-index: 30;
  max-height: 240px;
  overflow-y: auto;
}

.lang-option {
  padding: 7px 10px;
  font-size: 13px;
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s ease;
  user-select: none;
}

.lang-option:hover:not(.disabled) {
  background: var(--accent-soft);
}

.lang-option.selected {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
}

.lang-option.disabled {
  color: var(--text-faint);
  cursor: not-allowed;
  opacity: 0.55;
}

.lang-option.disabled::after {
  content: " · same as other";
  font-size: 10px;
  color: var(--text-faint);
  font-weight: 400;
}

.lang-arrow {
  font-size: 16px;
  color: var(--text-faint);
  padding-bottom: 9px;
  flex: 0 0 auto;
}

/* =========================================================
   REFINE (right)
   ========================================================= */
.refine-empty {
  color: var(--text-faint);
  font-size: 13px;
  text-align: center;
  padding: 48px 16px;
  background: var(--panel-inset);
  border: 1px dashed var(--border);
  border-radius: 10px;
  line-height: 1.6;
}

.refine-form { display: flex; flex-direction: column; gap: 14px; }

.refine-target {
  background: var(--accent-soft);
  border: 1px solid transparent;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
  word-break: break-all;
}

.refine-target-label {
  font-weight: 700;
  color: var(--accent-strong);
  margin-right: 6px;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.5px;
}

.refine-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 600;
}

.refine-form .muted {
  color: var(--text-faint);
  font-weight: 400;
  font-size: 11px;
}

.refine-form input[type="text"],
.refine-form textarea {
  font-family: inherit;
  font-size: 13px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-inset);
  color: var(--text);
  resize: vertical;
}

.refine-form input[type="text"]::placeholder,
.refine-form textarea::placeholder { color: var(--text-faint); }

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

.refine-form textarea { min-height: 120px; }

.refine-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
}

.refine-error {
  margin: 0;
  font-size: 12px;
  color: var(--error-fg);
  background: var(--error-bg);
  padding: 8px 12px;
  border-radius: 6px;
}

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer .dot { opacity: 0.5; }
