@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&display=swap');

.tdg-app {
  --navy: #1b1149;
  --red: #cd2c18;
  --white: #ffffff;
  --cream: #faf9f7;
  --gray: #f0eff5;
  --muted: #7b748f;
  --border: rgba(27, 17, 73, 0.12);
  --shadow: 0 12px 30px rgba(27, 17, 73, 0.12);
  font-family: 'FS Siena', 'DM Sans', sans-serif;
  color: var(--navy);
  background: var(--cream);
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 24px;
  box-sizing: border-box;
}

.tdg-app h1,
.tdg-app h2,
.tdg-app h3,
.tdg-app .tdg-term-name,
.tdg-app .tdg-totd-term {
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}

.tdg-hero {
  background: linear-gradient(130deg, #1b1149 0%, #2a1d6e 60%, #1b1149 100%);
  border-radius: 16px;
  padding: 48px 34px;
  margin-bottom: 14px;
  color: var(--white);
  box-shadow: var(--shadow);
}

.tdg-hero h1 {
  font-size: clamp(30px, 4.5vw, 56px);
  line-height: 1.05;
  margin: 0;
  color: #ffffff !important;
}

.tdg-hero p { margin: 12px 0 0; color: rgba(255, 255, 255, 0.84); font-size: 16px; }
.tdg-label { display: inline-block; margin-bottom: 14px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; padding: 6px 12px; border-radius: 999px; border: 1px solid rgba(205,44,24,0.5); background: rgba(205,44,24,0.16); color: #ffb7ab; }

.tdg-search-wrap { margin-top: 22px; max-width: 780px; }
#tdg-search {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 11px;
  padding: 15px 16px;
  background: rgba(255,255,255,0.1);
  color: var(--white);
  font-size: 16px;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}
#tdg-search::placeholder { color: rgba(255,255,255,0.65); }
#tdg-search:focus { outline: 2px solid rgba(205,44,24,0.8); outline-offset: 0; }
.tdg-search-meta { margin-top: 8px; display: flex; gap: 10px; align-items: center; font-size: 12px; }
#tdg-search-count { color: rgba(255,255,255,0.8); }
#tdg-did-you-mean { color: #ffb7ab; }
#tdg-did-you-mean a { color: #ffd3cb; }

.tdg-controls {
  position: sticky;
  top: 20px;
  z-index: 20;
  background: rgba(255,255,255,0.98);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px 210px 210px;
  gap: 8px;
  align-items: center;
}

.tdg-az { display: flex; flex-wrap: wrap; gap: 4px; }
.tdg-az button {
  width: 27px;
  height: 27px;
  border-radius: 5px;
  border: 0;
  background: transparent;
  font-size: 12px;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
}
.tdg-az button:hover { background: var(--gray); }
.tdg-az button.active { background: var(--navy); color: var(--white); }
.tdg-az button.disabled { opacity: 0.35; cursor: default; }

.tdg-category {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px;
  font-size: 13px;
  color: var(--navy);
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}

.tdg-mode-toggle {
  position: relative;
  background: var(--gray);
  border-radius: 9px;
  padding: 3px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  isolation: isolate;
}

.tdg-mode-toggle::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: calc(50% - 4.5px);
  height: calc(100% - 6px);
  background: var(--navy);
  border-radius: 7px;
  transition: transform 0.26s ease;
  z-index: 0;
}

.tdg-mode-toggle.is-technical::before {
  transform: translateX(100%);
}

.tdg-mode-toggle button {
  position: relative;
  z-index: 1;
  border: 0;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  font-weight: 700;
  transition: color 0.2s ease, background 0.2s ease;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.tdg-mode-toggle button.active {
  color: var(--white) !important;
  background: transparent !important;
}

.tdg-mode-toggle button:not(.active):hover {
  color: var(--red);
  background: rgba(205, 44, 24, 0.1);
}

.tdg-mode-toggle button:focus,
.tdg-mode-toggle button:active {
  outline: none;
}

.tdg-quiz-btn {
  border: 0;
  border-radius: 8px;
  background: var(--red);
  color: var(--white);
  padding: 10px 12px;
  font-weight: 700;
  cursor: pointer;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}

.tdg-layout {
  display: grid;
  grid-template-columns: 280px minmax(0,1fr);
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}

.tdg-sidebar {
  border-right: 1px solid var(--border);
  padding: 16px 0;
  position: relative;
  top: auto;
  max-height: none;
  overflow-y: visible;
}

.tdg-sidebar-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); padding: 0 16px 8px; }
#tdg-sidebar-list button {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--navy);
  cursor: pointer;
  border-left: 3px solid transparent;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}
#tdg-sidebar-list button:hover { background: var(--gray); border-left-color: var(--red); color: var(--red); }
#tdg-sidebar-list button.active { background: rgba(205,44,24,0.07); border-left-color: var(--red); color: var(--red); font-weight: 700; }

.tdg-totd { margin: 0 12px 14px; border-radius: 12px; padding: 14px; background: linear-gradient(140deg, #1b1149 0%, #2a1d6e 100%); color: #fff; }
.tdg-totd-label { font-size: 10px; letter-spacing: 0.11em; text-transform: uppercase; color: rgba(255,255,255,0.7); }
.tdg-totd-term { margin-top: 6px; font-size: 20px; }
.tdg-totd-def { margin-top: 7px; font-size: 13px; color: rgba(255,255,255,0.82); line-height: 1.45; }

.tdg-main { padding: 24px; background: var(--cream); }
.tdg-no-results { display: none; text-align: center; padding: 40px 16px; background: #fff; border: 1px solid var(--border); border-radius: 10px; }
.tdg-no-results.visible { display: block; }

.tdg-letter-section { margin-bottom: 26px; }
.tdg-letter-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.tdg-letter-badge { width: 44px; height: 44px; border-radius: 8px; background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 24px; font-weight: 700; }
.tdg-letter-line { height: 1px; background: var(--border); flex: 1; }

.tdg-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  background: #fff;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.tdg-card:hover { border-color: rgba(27,17,73,0.25); transform: translateY(-1px); box-shadow: 0 5px 18px rgba(27,17,73,0.08); }
.tdg-card.expanded { border-color: var(--navy); box-shadow: 0 8px 28px rgba(27,17,73,0.13); }
.tdg-card-head { padding: 18px; display: flex; justify-content: space-between; gap: 10px; cursor: pointer; align-items: center; }
.tdg-term-name { font-size: 21px; line-height: 1.2; }
.tdg-head-tools { display: flex; align-items: center; gap: 8px; }
.tdg-abbr { background: rgba(205,44,24,0.12); color: var(--red); border-radius: 5px; font-size: 10px; font-weight: 800; padding: 4px 7px; letter-spacing: 0.08em; }
.tdg-icon-btn { border: 1px solid var(--border); background: #fff; border-radius: 6px; padding: 6px 10px; font-size: 12px; cursor: pointer; color: var(--muted); font-family: 'FS Siena', 'DM Sans', sans-serif; }
.tdg-icon-btn.saved { background: var(--navy); border-color: var(--navy); color: #fff; }
.tdg-expand { width: 30px; height: 30px; border-radius: 99px; display: grid; place-items: center; background: var(--gray); font-size: 18px; transition: transform 0.24s ease, background 0.24s ease, color 0.24s ease; }
.tdg-card.expanded .tdg-expand { background: var(--navy); color: #fff; transform: rotate(180deg); }

.tdg-card-body { display: none; padding: 0 18px 18px; animation: tdg-slide 0.2s ease; }
.tdg-card.expanded .tdg-card-body { display: block; }
@keyframes tdg-slide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
.tdg-divider { height: 1px; background: var(--border); margin-bottom: 12px; }

.tdg-def-stage { display: grid; overflow: hidden; }
.tdg-def-pane {
  grid-area: 1 / 1;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.tdg-def-pane .tdg-def-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700; color: var(--muted); margin-bottom: 6px; }
.tdg-definition { font-size: 15px; line-height: 1.7; color: #3d3552; }

.tdg-def-simple {
  opacity: 1;
  transform: translateX(0);
}

.tdg-def-technical {
  opacity: 0;
  transform: translateX(26px);
  pointer-events: none;
}

.tdg-app[data-mode='technical'] .tdg-def-simple {
  opacity: 0;
  transform: translateX(-26px);
  pointer-events: none;
}

.tdg-app[data-mode='technical'] .tdg-def-technical {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.tdg-related { margin-top: 12px; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.tdg-related span:first-child { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.tdg-tag { border: 0; border-radius: 999px; padding: 5px 10px; font-size: 12px; background: var(--gray); color: var(--navy); cursor: pointer; font-family: 'FS Siena', 'DM Sans', sans-serif; }
.tdg-tag:hover { background: var(--navy); color: #fff; }

.tdg-conversation-cta {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.tdg-conversation-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.tdg-conversation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tdg-conversation-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--navy);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.tdg-conversation-actions .tdg-conversation-btn,
.tdg-conversation-actions button.tdg-conversation-btn,
.tdg-conversation-actions a.tdg-conversation-btn {
  background: #ffffff !important;
  color: var(--navy) !important;
  border: 1px solid var(--border) !important;
  box-shadow: none !important;
  appearance: none;
  -webkit-appearance: none;
}

.tdg-conversation-btn:hover {
  transform: translateY(-1px);
  border-color: var(--navy);
  background: var(--gray);
  color: var(--navy);
}

.tdg-conversation-actions .tdg-conversation-btn:hover,
.tdg-conversation-actions button.tdg-conversation-btn:hover,
.tdg-conversation-actions a.tdg-conversation-btn:hover {
  background: var(--gray) !important;
  color: var(--navy) !important;
  border-color: var(--navy) !important;
}

.tdg-actions { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; align-items: center; }
.tdg-copy { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 12px; padding: 5px 7px; border-radius: 6px; font-family: 'FS Siena', 'DM Sans', sans-serif; }
.tdg-copy:hover { background: var(--gray); color: var(--navy); }
.tdg-helpful { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.tdg-vote { border: 1px solid var(--border); background: #fff; border-radius: 999px; padding: 6px 11px; font-size: 12px; font-weight: 700; color: var(--navy); cursor: pointer; font-family: 'FS Siena', 'DM Sans', sans-serif; }
.tdg-vote.active-up { background: #e8f5e9; border-color: #4caf50; color: #2e7d32; }
.tdg-vote.active-down { background: #fdecea; border-color: var(--red); color: var(--red); }

.tdg-modal {
  position: fixed;
  inset: 0;
  background: rgba(27,17,73,0.74);
  backdrop-filter: blur(4px);
  display: none;
  z-index: 99999;
  padding: 24px;
  overflow-y: auto;
}

.tdg-modal.open { display: grid; place-items: start center; }

.tdg-modal-panel {
  width: min(760px, 100%);
  background: #f6f6f8;
  border-radius: 18px;
  overflow: hidden;
  margin-top: 18px;
  box-shadow: var(--shadow);
}

.tdg-modal-head {
  background: linear-gradient(180deg, #1b1149 0%, #1b1149 100%);
  color: #fff;
  padding: 20px 22px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  min-height: 96px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tdg-modal-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tdg-modal-head h3 { margin: 0; font-size: 28px; color: #ffffff !important; }
#tdg-quiz-modal .tdg-modal-head h3,
#tdg-quiz-modal .tdg-modal-title-wrap h3 {
  color: #ffffff !important;
}

#tdg-quiz-progress-text {
  color: rgba(255,255,255,0.78);
  font-size: 13px;
  font-weight: 600;
}

.tdg-modal-head button {
  border: 0;
  border-radius: 7px;
  background: rgba(255,255,255,0.2);
  color: #fff;
  padding: 8px 10px;
  cursor: pointer;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
}

#tdg-quiz-progress {
  height: 4px;
  background: linear-gradient(90deg, var(--red) var(--progress,0%), #eceaf8 0%);
}

#tdg-quiz-body { padding: 34px 22px 22px; background: #f6f6f8; }

.tdg-q-label {
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.tdg-q-term {
  color: var(--navy);
  font-size: 25px;
  line-height: 1.3;
  margin: 0 0 18px;
}

.tdg-q-options { display: grid; gap: 10px; }

.tdg-q-options button {
  border: 1px solid rgba(27, 17, 73, 0.18);
  background: #fff;
  border-radius: 10px;
  text-align: left;
  padding: 14px 22px;
  cursor: pointer;
  font-family: 'FS Siena', 'DM Sans', sans-serif;
  color: var(--navy);
  font-size: 15px;
  line-height: 1.5;
  white-space: normal;
  overflow-wrap: anywhere;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.tdg-q-options button:hover:not(:disabled) {
  border-color: var(--navy);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(27, 17, 73, 0.09);
}

.tdg-q-options button.correct { border-color: #4caf50; background: #e8f5e9; color: #2e7d32; }
.tdg-q-options button.wrong { border-color: var(--red); background: #fdecea; color: #8f1e13; }

.tdg-q-result {
  margin-top: 12px;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 600;
}

.tdg-q-result.correct {
  background: #e8f5e9;
  border: 1px solid #4caf50;
  color: #2e7d32;
}

.tdg-q-result.wrong {
  background: #fdecea;
  border: 1px solid var(--red);
  color: #8f1e13;
}

.tdg-score { text-align: center; padding: 18px 0 10px; font-weight: 700; font-size: 28px; color: var(--navy); }

@media (max-width: 1100px) {
  .tdg-app { padding: 16px; }
  .tdg-controls { grid-template-columns: 1fr; }
  .tdg-layout { grid-template-columns: 1fr; }
  .tdg-sidebar { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--border); }
}

@media (max-width: 640px) {
  .tdg-app { padding: 10px; }
  .tdg-hero { padding: 28px 16px; }
  .tdg-main { padding: 16px; }
  .tdg-card-head { padding: 14px; }
  .tdg-term-name { font-size: 18px; }
  .tdg-card-body { padding: 0 14px 14px; }
  .tdg-conversation-actions { flex-direction: column; align-items: stretch; }
  .tdg-conversation-btn { width: 100%; }
  .tdg-modal { padding: 10px; }
  .tdg-modal-head h3 { font-size: 24px; }
  .tdg-q-term { font-size: 21px; }
  #tdg-quiz-body { padding: 20px 16px 16px; }
  .tdg-q-options button { padding: 12px 14px; }
}