@import url('https://fonts.googleapis.com/css2?family=Dancing+Script:wght@700&family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=Manrope:wght@200..800&display=swap');

*, *::before, *::after { box-sizing: border-box; }

:root {
  --cyan:        rgb(0, 224, 254);
  --cyan-dark:   rgb(0, 202, 229);
  --cyan-light:  rgb(51, 231, 255);
  --orange:      rgb(234, 88, 12);
  --orange-dark: rgb(192, 86, 33);
  --orange-light: rgb(237, 137, 54);
  --navy-dark:   rgb(14, 19, 27);
  --navy-main:   rgb(23, 30, 44);
  --navy-light:  rgb(31, 42, 61);
  --grey-blue:   rgb(43, 48, 59);
  --quasi-white: rgb(250, 250, 250);
  --green:       rgb(132, 204, 22);
  --red:         rgb(220, 38, 38);

  --bg:           var(--navy-dark);
  --surface:      var(--navy-main);
  --surface-2:    var(--navy-light);
  --border:       var(--grey-blue);
  --border-strong: rgb(62, 70, 88);
  --text:         var(--quasi-white);
  --text-muted:   rgb(140, 152, 173);
  --accent:       var(--cyan);
  --accent-hover: var(--cyan-dark);
  --accent-glow:  rgba(0, 224, 254, 0.12);
  --correct:      var(--green);
  --correct-bg:   rgba(132, 204, 22, 0.1);
  --wrong:        var(--red);
  --wrong-bg:     rgba(220, 38, 38, 0.1);

  --radius:    14px;
  --radius-sm: 10px;
  --shadow:    0 4px 24px rgba(0, 0, 0, 0.5);
  --transition: 0.15s ease;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* ── Gate (decoy PIN screen) ── */
.gate {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.gate.hidden { display: none; }

.gate-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.45) saturate(0.8);
}

.gate-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(14, 19, 27, 0.3) 0%,
    rgba(14, 19, 27, 0.7) 100%
  );
}

.gate-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  padding: 2rem;
  text-align: center;
}

.gate-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.gate-logo-main {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-shadow: 0 0 40px rgba(0, 224, 254, 0.4);
}

.gate-logo-sub {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(250, 250, 250, 0.5);
}

.gate-coming-soon {
  margin-top: 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--orange-light);
  border: 1px solid rgba(237, 137, 54, 0.4);
  padding: 0.3rem 0.9rem;
  border-radius: 99px;
}

.gate-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 280px;
  animation: fadeUp 0.3s ease;
}

.gate-form.hidden { display: none; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.gate-input {
  width: 100%;
  padding: 0.85rem 1.25rem;
  font: inherit;
  font-size: 1rem;
  letter-spacing: 0.15em;
  text-align: center;
  color: var(--quasi-white);
  background: rgba(23, 30, 44, 0.7);
  border: 1px solid rgba(0, 224, 254, 0.3);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.gate-input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 224, 254, 0.15), 0 0 20px rgba(0, 224, 254, 0.1);
}

.gate-input::placeholder { color: rgba(250, 250, 250, 0.3); letter-spacing: 0.05em; }

.gate-btn {
  width: 100%;
  padding: 0.8rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy-dark);
  background: var(--cyan);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

.gate-btn:hover {
  background: var(--cyan-light);
  box-shadow: 0 0 20px rgba(0, 224, 254, 0.35);
}

.gate .pin-error {
  color: rgba(248, 113, 113, 0.9);
  font-size: 0.82rem;
}

.app {
  width: 100%;
  min-height: 100vh;
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

/* ── Header ── */
.header {
  text-align: center;
  margin-bottom: 2.25rem;
}

.header h1 {
  margin: 0;
  font-family: 'Manrope', sans-serif;
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent);
}

.subtitle {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.freaky {
  font-family: 'Dancing Script', cursive;
  font-size: 1.15rem;
  font-weight: 700;
  background: linear-gradient(
    90deg,
    var(--cyan),
    var(--orange-light),
    rgb(233, 47, 139),
    var(--cyan-light),
    var(--orange),
    var(--cyan)
  );
  background-size: 300% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: rainbow 4s linear infinite;
}

@keyframes rainbow {
  0%   { background-position: 0% center; }
  100% { background-position: 300% center; }
}

.main { position: relative; }

/* ── Panel ── */
.panel {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow);
  animation: panelIn 0.28s ease;
}

@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel.hidden { display: none; }

.panel h2 {
  margin: 0 0 1.1rem;
  font-family: 'Manrope', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

/* ── PIN ── */
.pin-desc {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.pin-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  max-width: 340px;
}

.pin-input {
  width: 100%;
  min-width: 180px;
  padding: 0.8rem 1rem;
  font: inherit;
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-align: center;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.pin-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.pin-input::placeholder {
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.pin-error {
  margin: 0.9rem 0 0;
  font-size: 0.85rem;
  color: var(--wrong);
}
.pin-error.hidden { display: none; }

/* ── Quiz / Deck list ── */
.quiz-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

@media (min-width: 600px) {
  .quiz-list { display: grid; grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .quiz-list { grid-template-columns: repeat(3, 1fr); }
}

.quiz-list button {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.85rem 1rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.quiz-list button:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

.quiz-list button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.quiz-list button .quiz-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--accent);
  color: var(--navy-dark);
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 0.82rem;
  border-radius: 7px;
  flex-shrink: 0;
}

.quiz-list button .quiz-num-all {
  background: linear-gradient(135deg, var(--green), rgb(0, 190, 140));
}

.quiz-list button .quiz-num-viewall {
  background: linear-gradient(135deg, rgb(153, 61, 245), rgb(110, 30, 210));
  color: var(--quasi-white);
}

.hint {
  margin: 1.1rem 0 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.hint code {
  padding: 0.15em 0.45em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 0.88em;
}

/* ── Quiz meta bar ── */
.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-back-to-menu {
  padding: 0.35rem 0.8rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.btn-back-to-menu:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

.btn-back-to-menu:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── View all Q&A ── */
.view-all-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.view-all-header h2 { margin: 0; flex: 1; min-width: 200px; }
.view-all-content { max-height: 70vh; overflow-y: auto; }
.qa-list { display: flex; flex-direction: column; gap: 1rem; }

.qa-item {
  padding: 1rem 1.25rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
}

.qa-question {
  font-size: 0.97rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.qa-num { color: var(--accent); font-weight: 700; margin-right: 0.25rem; }

.qa-options {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.qa-option {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.4;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid transparent;
}

.qa-option-correct {
  color: var(--correct);
  font-weight: 600;
  background: var(--correct-bg);
  border-color: rgba(132, 204, 22, 0.25);
}

.qa-option-check { color: var(--correct); font-weight: 700; }

/* ── Progress ── */
.quiz-title {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  color: var(--accent);
  font-size: 0.9rem;
}

.progress {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.progress-bar-wrap {
  height: 3px;
  background: var(--surface-2);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.35s ease;
}

/* ── Question card (quiz mode) ── */
.question-card { margin-bottom: 1.5rem; }

.question-text {
  margin: 0 0 1.1rem;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
}

.answers-list { list-style: none; margin: 0; padding: 0; }
.answers-list li { margin: 0 0 0.45rem; }

.answer-option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.answer-option:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

.answer-option.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 0 1px rgba(0, 224, 254, 0.15);
}

.answer-option input {
  margin: 0.2rem 0 0;
  accent-color: var(--accent);
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.answer-option .answer-text {
  flex: 1;
  cursor: pointer;
  font-size: 0.92rem;
  line-height: 1.45;
}

.answer-option.correct {
  border-color: rgba(132, 204, 22, 0.4);
  background: var(--correct-bg);
}

.answer-option.wrong {
  border-color: rgba(220, 38, 38, 0.4);
  background: var(--wrong-bg);
}

.answer-option:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Buttons ── */
.actions {
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.btn {
  padding: 0.65rem 1.4rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  border: 2px solid transparent;
}

.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn.hidden { display: none; }

.btn-primary {
  background: var(--accent);
  color: var(--navy-dark);
  border-color: var(--accent);
}
.btn-primary:hover:not(:disabled) {
  background: transparent;
  color: var(--accent);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* ── Results ── */
.score-display {
  font-family: 'Manrope', sans-serif;
  font-size: 3.2rem;
  font-weight: 800;
  text-align: center;
  margin: 0.5rem 0 0.25rem;
  color: var(--accent);
  line-height: 1.2;
}

.score-display .total {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-muted);
}

.score-detail {
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.75rem 0;
}

.score-detail p { margin: 0 0 0.4rem; }

.results-review {
  margin: 1.5rem 0 2rem;
  max-height: 55vh;
  overflow-y: auto;
}

.results-review-list { display: flex; flex-direction: column; gap: 0.75rem; }

.result-item {
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
}

.result-item-right { border-left-color: var(--correct); background: var(--correct-bg); }
.result-item-wrong { border-left-color: var(--wrong); background: var(--wrong-bg); }

.result-item-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
}

.result-item-num { font-weight: 700; color: var(--text-muted); font-size: 0.85rem; }

.result-badge {
  font-family: 'Manrope', sans-serif;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.18rem 0.5rem;
  border-radius: 5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-badge-right { background: var(--correct); color: var(--navy-dark); }
.result-badge-wrong { background: var(--wrong); color: #fff; }

.result-item-question {
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.4rem;
  line-height: 1.4;
  font-size: 0.92rem;
}

.result-item-your,
.result-item-correct {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 0.5rem;
  line-height: 1.35;
}

.result-item-correct { margin-top: 0.3rem; color: var(--correct); }
.result-item-correct strong { color: var(--correct); }

#btn-restart { display: block; margin: 0 auto; }

/* ── Question transition ── */
.question-card.animate-out {
  animation: questionOut 0.18s ease forwards;
}
@keyframes questionOut {
  to { opacity: 0; transform: translateX(-6px); }
}

.question-card.animate-in {
  animation: questionIn 0.24s ease;
}
@keyframes questionIn {
  from { opacity: 0; transform: translateX(6px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ══════════════════════════════════════════
   Freakcards — flashcard-specific styles
   ══════════════════════════════════════════ */

.fc-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.fc-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon {
  padding: 0.35rem 0.8rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  white-space: nowrap;
}
.btn-icon:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}
.btn-icon.active {
  color: var(--navy-dark);
  background: var(--accent);
  border-color: var(--accent);
}
#btn-shuffle.active {
  background: var(--orange);
  border-color: var(--orange);
}

/* ── 3-D flip card ── */
.scene {
  width: 100%;
  height: 300px;
  perspective: 1000px;
  cursor: pointer;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
}

@media (min-width: 640px) {
  .scene { height: 340px; }
}

.scene.with-choices { height: 420px; }
@media (min-width: 640px) {
  .scene.with-choices { height: 460px; }
}

.fc-card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius);
}
.fc-card.flipped { transform: rotateY(180deg); }

.fc-face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  padding: 2rem 2.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.fc-front { background: var(--surface); }
.fc-back  { background: var(--surface-2); transform: rotateY(180deg); }

.fc-face-tag {
  font-family: 'Manrope', sans-serif;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.fc-back .fc-face-tag { color: var(--correct); }

.fc-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
}

.fc-question {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 500;
  line-height: 1.6;
  text-align: center;
  color: var(--text);
}

.fc-answers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
}
.fc-answers li {
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.4;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
}
.fc-answers li.correct {
  border-color: rgba(132, 204, 22, 0.4);
  background: var(--correct-bg);
  color: var(--correct);
  font-weight: 600;
}

.fc-hint {
  margin-top: 1rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
}
.fc-hint kbd {
  display: inline-block;
  padding: 0.1em 0.45em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.7rem;
}

.fc-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.fc-actions .btn { min-width: 100px; }

/* choices mode */
.fc-front.with-choices .fc-body {
  align-items: flex-start;
  flex: 0 0 auto;
}
.fc-front.with-choices .fc-question {
  text-align: left;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}
.fc-front-choices {
  margin-top: 0.75rem;
  flex: 1;
  overflow: auto;
}
.fc-front-choices.hidden { display: none; }

/* slide between cards */
@keyframes fcSlideIn {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}
.fc-card.slide-in { animation: fcSlideIn 0.22s ease; }