/* ==========================================================================
   SE201 exam / quiz design system
   Shared by every standalone quiz page under
   /academics/software-engineering/se201/exams/
   Theme is driven by html[data-theme="light|dark"] (set by standalone-theme.js
   and html-theme-sync.js). Every colour below resolves from a token, so the
   two themes stay in sync with no !important overrides.
   ========================================================================== */

:root {
  color-scheme: light;

  --bg: #f6f6fa;
  --bg-tint-a: rgba(109, 74, 255, 0.1);
  --bg-tint-b: rgba(56, 189, 248, 0.08);

  --surface: #ffffff;
  --surface-2: #f4f3f9;
  --surface-3: #ecebf4;
  --surface-inset: #f8f8fc;

  --text: #17131f;
  --text-2: #545065;
  --text-3: #86819a;

  --border: #e6e3f0;
  --border-2: #d6d2e6;

  --accent: #6d4aff;
  --accent-2: #9a4dff;
  --accent-ink: #5733e6;
  --accent-soft: rgba(109, 74, 255, 0.09);
  --accent-line: rgba(109, 74, 255, 0.28);
  --on-accent: #ffffff;

  --ok: #0f9d58;
  --ok-ink: #0b7a44;
  --ok-soft: rgba(15, 157, 88, 0.1);
  --ok-line: rgba(15, 157, 88, 0.34);

  --bad: #e04355;
  --bad-ink: #c02b3d;
  --bad-soft: rgba(224, 67, 85, 0.09);
  --bad-line: rgba(224, 67, 85, 0.32);

  --warn: #c07a12;
  --warn-ink: #9a6009;
  --warn-soft: rgba(214, 148, 32, 0.12);
  --warn-line: rgba(214, 148, 32, 0.36);

  --info-soft: rgba(56, 132, 255, 0.09);
  --info-line: rgba(56, 132, 255, 0.3);
  --info-ink: #2f6ad9;

  --shadow-sm: 0 1px 2px rgba(23, 19, 31, 0.05);
  --shadow:
    0 6px 20px -8px rgba(23, 19, 31, 0.16),
    0 2px 6px -2px rgba(23, 19, 31, 0.06);
  --shadow-lg:
    0 24px 60px -24px rgba(23, 19, 31, 0.28),
    0 6px 18px -10px rgba(23, 19, 31, 0.1);
  --shadow-accent: 0 12px 28px -12px rgba(109, 74, 255, 0.55);

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 26px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 220ms;

  --font:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --page-w: 940px;
}

html[data-theme="dark"] {
  color-scheme: dark;

  --bg: #08060e;
  --bg-tint-a: rgba(138, 99, 255, 0.16);
  --bg-tint-b: rgba(56, 189, 248, 0.1);

  --surface: #12101c;
  --surface-2: #191626;
  --surface-3: #211d31;
  --surface-inset: #16131f;

  --text: #ece9f5;
  --text-2: #a8a2bd;
  --text-3: #7d7794;

  --border: #262137;
  --border-2: #332c48;

  --accent: #a98bff;
  --accent-2: #cf7cff;
  --accent-ink: #c1abff;
  --accent-soft: rgba(169, 139, 255, 0.13);
  --accent-line: rgba(169, 139, 255, 0.34);
  --on-accent: #100a20;

  --ok: #3ecf8e;
  --ok-ink: #6ee7b0;
  --ok-soft: rgba(62, 207, 142, 0.13);
  --ok-line: rgba(62, 207, 142, 0.34);

  --bad: #ff6b7d;
  --bad-ink: #ff97a4;
  --bad-soft: rgba(255, 107, 125, 0.13);
  --bad-line: rgba(255, 107, 125, 0.32);

  --warn: #e0a83c;
  --warn-ink: #f0c469;
  --warn-soft: rgba(224, 168, 60, 0.14);
  --warn-line: rgba(224, 168, 60, 0.34);

  --info-soft: rgba(96, 160, 255, 0.13);
  --info-line: rgba(96, 160, 255, 0.32);
  --info-ink: #8fb8ff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow:
    0 8px 24px -10px rgba(0, 0, 0, 0.7), 0 2px 6px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg:
    0 30px 70px -30px rgba(0, 0, 0, 0.85), 0 8px 20px -12px rgba(0, 0, 0, 0.6);
  --shadow-accent: 0 12px 30px -14px rgba(169, 139, 255, 0.6);
}

/* --------------------------------------------------------------- shell -- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: clamp(56px, 7vw, 80px) clamp(14px, 4vw, 32px) clamp(48px, 8vw, 96px);
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(60rem 40rem at 12% -12%, var(--bg-tint-a), transparent 62%),
    radial-gradient(48rem 34rem at 92% 4%, var(--bg-tint-b), transparent 60%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.container,
.wrap,
.quiz-container {
  max-width: var(--page-w);
  margin: 0 auto;
  background: none;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 650;
  color: var(--text);
}

p {
  margin: 0 0 0.75em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--accent-ink);
}

img {
  max-width: 100%;
  height: auto;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

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

.header,
.quiz-header,
.card.header {
  position: relative;
  margin-bottom: clamp(20px, 3vw, 32px);
  padding: clamp(26px, 4vw, 40px) clamp(22px, 4vw, 40px);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background:
    linear-gradient(140deg, var(--accent-soft), transparent 58%), var(--surface);
  box-shadow: var(--shadow);
  text-align: left;
  color: var(--text);
  overflow: hidden;
  animation: sgRise 520ms var(--ease) both;
}

.header::after,
.quiz-header::after,
.card.header::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-2),
    transparent
  );
}

.header h1,
.quiz-header h1,
.card.header .h1 {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0 0 0.35rem;
}

.card.header .h2 {
  font-size: 1.05rem;
  font-weight: 620;
  color: var(--accent-ink);
  margin-bottom: 0.35rem;
}

.header p,
.quiz-header p,
.card.header .sub {
  margin: 0;
  max-width: 60ch;
  color: var(--text-2);
  font-size: 0.95rem;
}

/* --------------------------------------------------------- progress bar -- */

.progress-bar {
  margin-top: 22px;
  height: 6px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 480ms var(--ease);
}

/* -------------------------------------------------- content / sections --- */

.exam-content,
.quiz-content,
.quiz-body,
.content {
  display: block;
  padding: 0;
  background: none;
}

.section {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  padding: 0;
  background: none;
  color: var(--text-3);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.stats-box,
.quiz-info,
.footer {
  margin-bottom: 22px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  color: var(--text-2);
  font-size: 0.9rem;
  animation: sgRise 520ms var(--ease) both;
  animation-delay: 60ms;
}

.stats-box h3 {
  margin-bottom: 6px;
  font-size: 0.95rem;
  color: var(--text);
}

.stats-box p,
.quiz-info p {
  margin: 0 0 4px;
}

.quiz-info strong {
  color: var(--text);
}

.footer {
  margin: 26px 0 0;
  background: none;
  border: 0;
  box-shadow: none;
  text-align: center;
  color: var(--text-3);
  font-size: 0.82rem;
}

/* ------------------------------------------------------------ question -- */

.question-block,
.question-card,
.question-container,
.question,
.qCard,
.card:not(.header) {
  position: relative;
  margin: 0 0 16px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition:
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  animation: sgRise 520ms var(--ease) both;
}

.question-block:hover,
.question-card:hover,
.question:hover,
.qCard:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.space {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.question-header,
.qHead {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.question-number,
.num,
.question-type,
.points-indicator,
.difficulty-badge,
.source-badge,
.tag,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
}

.question-number,
.num {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

/* Chapter 1 uses a bare digit — render it as a numbered chip. */
[data-exam="1"] .question-number {
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.8rem;
  letter-spacing: 0;
  flex: 0 0 auto;
}

.qHead {
  align-items: flex-start;
}

.qCard .num {
  margin-top: 2px;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.8rem;
  letter-spacing: 0;
  flex: 0 0 auto;
}

/* Chapter 6 puts the difficulty chip inside .question-number; one pill inside
   another reads as a mistake, so the outer one gives up its chrome. */
.question-number:has(.difficulty-badge) {
  padding: 0;
  border: 0;
  background: none;
  gap: 9px;
}

.difficulty-badge.easy {
  border-color: var(--ok-line);
  background: var(--ok-soft);
  color: var(--ok-ink);
}

.difficulty-badge.medium {
  border-color: var(--warn-line);
  background: var(--warn-soft);
  color: var(--warn-ink);
}

.difficulty-badge.hard {
  border-color: var(--bad-line);
  background: var(--bad-soft);
  color: var(--bad-ink);
}

.tag.generated-tag,
.pill.gen {
  border-color: var(--info-line);
  background: var(--info-soft);
  color: var(--info-ink);
}

.source-badge,
.tag.past-exam-tag,
.pill.past {
  border-color: var(--warn-line);
  background: var(--warn-soft);
  color: var(--warn-ink);
}

.question-text,
.qText {
  flex: 1 1 260px;
  min-width: 0;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text);
}

.qTextRow {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

/* Chapter 4 / 5 keep the badges inside .question-text */
.question-text .question-number,
.question-text .points-indicator,
.question-text .tag {
  margin-right: 8px;
  vertical-align: middle;
}

.question-card .question-number {
  margin-bottom: 10px;
}

/* One-question-at-a-time pages (chapters 2 & 3) */
.question-container {
  display: none;
}

.question-container.active {
  display: block;
  animation: sgSlideIn 380ms var(--ease) both;
}

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

.options,
.options-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.option,
.opt {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-inset);
  color: var(--text);
  font-size: 0.94rem;
  line-height: 1.45;
  cursor: pointer;
  transition:
    border-color 160ms var(--ease),
    background-color 160ms var(--ease),
    transform 160ms var(--ease),
    box-shadow 160ms var(--ease);
}

.option:hover,
.opt:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  transform: translateX(2px);
}

.option:has(input:checked),
.opt:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent-line);
}

.option label,
.opt label {
  flex: 1;
  margin: 0;
  cursor: pointer;
}

.option input[type="radio"],
.option input[type="checkbox"],
.opt input[type="radio"],
.opt input[type="checkbox"] {
  flex: 0 0 auto;
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--border-2);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 0.76rem;
  font-weight: 700;
  transition:
    border-color 160ms var(--ease),
    background-color 160ms var(--ease),
    color 160ms var(--ease);
}

/* Interactive selection states (chapters 2 & 3, quiz 1) */
.option.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.option.selected .option-letter {
  border-color: transparent;
  background: var(--accent);
  color: var(--on-accent);
}

.option.correct,
.opt.correct {
  border-color: var(--ok-line);
  background: var(--ok-soft);
  color: var(--ok-ink);
}

.option.correct .option-letter {
  border-color: transparent;
  background: var(--ok);
  color: var(--on-accent);
}

.option.incorrect,
.opt.wrong {
  border-color: var(--bad-line);
  background: var(--bad-soft);
  color: var(--bad-ink);
}

.option.incorrect .option-letter {
  border-color: transparent;
  background: var(--bad);
  color: var(--on-accent);
}

.option.disabled,
.opt.disabled {
  cursor: default;
  transform: none;
}

.option.disabled:hover,
.opt.disabled:hover {
  transform: none;
}

/* ---------------------------------------------------------- text input -- */

textarea,
.textarea-input,
input[type="text"] {
  width: 100%;
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  background: var(--surface-inset);
  color: var(--text);
  font-family: inherit;
  font-size: 0.94rem;
  line-height: 1.5;
  transition:
    border-color 160ms var(--ease),
    box-shadow 160ms var(--ease);
}

textarea,
.textarea-input {
  min-height: 132px;
  resize: vertical;
}

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

textarea:disabled,
input:disabled {
  opacity: 0.75;
}

::placeholder {
  color: var(--text-3);
}

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

/* --------------------------------------------------------- matching Q --- */

.match-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.match-column h4 {
  margin-bottom: 10px;
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.match-input {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.match-input input[type="text"] {
  width: 42px;
  margin: 0;
  padding: 8px 0;
  text-align: center;
  font-weight: 700;
}

.match-input label {
  color: var(--text);
  font-size: 0.92rem;
}

.match-item {
  margin-bottom: 8px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-inset);
  color: var(--text-2);
  font-size: 0.9rem;
}

/* ------------------------------------------------- explanations / hints -- */

.explanation,
.explain,
.hint-box,
.answer-section,
.model-answer,
.model,
.feedback,
.scenario-box,
.code-block,
.image-placeholder {
  border-radius: var(--r-md);
}

.explanation,
.explain {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.6;
}

.explanation h4 {
  margin-bottom: 6px;
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.explanation strong,
.explain strong {
  color: var(--text);
}

/* Pages that reveal the explanation with a .show class */
[data-exam="1"] .explanation,
[data-exam="2"] .explanation,
[data-exam="3"] .explanation {
  display: none;
}

[data-exam="1"] .explanation.show,
[data-exam="2"] .explanation.show,
[data-exam="3"] .explanation.show {
  display: block;
  animation: sgReveal 340ms var(--ease) both;
}

[data-exam="1"] .explanation.correct {
  border-left-color: var(--ok);
  background: var(--ok-soft);
}

/* Pages that reveal the explanation by setting an inline display */
[data-exam="7"] .explanation,
[data-exam="8"] .explanation,
[data-exam="10"] .explanation {
  display: none;
  animation: sgReveal 340ms var(--ease) both;
}

.hint-button {
  margin-top: 12px;
  padding: 8px 14px;
  border: 1px dashed var(--warn-line);
  border-radius: 999px;
  background: var(--warn-soft);
  color: var(--warn-ink);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 650;
  cursor: pointer;
  transition:
    background-color 160ms var(--ease),
    border-color 160ms var(--ease),
    transform 160ms var(--ease);
}

.hint-button:hover {
  border-style: solid;
  transform: translateY(-1px);
}

.hint-box {
  display: none;
  margin-top: 12px;
  padding: 13px 15px;
  border: 1px solid var(--warn-line);
  border-left: 3px solid var(--warn);
  background: var(--warn-soft);
  color: var(--text-2);
  font-size: 0.88rem;
}

.hint-box.show {
  display: block;
  animation: sgReveal 340ms var(--ease) both;
}

.hint-box strong {
  color: var(--warn-ink);
}

/* Chapter 6 answer panels are toggled with an inline display */
.answer-section {
  display: none;
  margin-top: 14px;
  padding: 15px 17px;
  border: 1px solid var(--ok-line);
  background: var(--ok-soft);
  animation: sgReveal 340ms var(--ease) both;
}

.answer-section .explanation {
  margin-top: 10px;
  border-color: var(--border);
  border-left-color: var(--ok);
  background: var(--surface);
}

.correct-answer {
  margin: 0;
  color: var(--ok-ink);
  font-weight: 700;
}

.model-answer,
.model {
  margin-top: 12px;
  padding: 13px 15px;
  border: 1px solid var(--info-line);
  border-left: 3px solid var(--info-ink);
  background: var(--info-soft);
  color: var(--text-2);
  font-size: 0.89rem;
}

.model-answer strong,
.model strong {
  color: var(--text);
}

.model-answer ol,
.model-answer ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.model-answer li {
  margin-bottom: 5px;
}

.essay-feedback {
  color: var(--text);
  font-weight: 600;
}

.scenario-box {
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-2);
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 0.9rem;
}

.code-block,
pre,
code {
  font-family: var(--font-mono);
}

.code-block {
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  background: var(--surface-inset);
  color: var(--text);
  font-size: 0.83rem;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-x: auto;
}

.image-placeholder {
  margin: 14px 0;
  padding: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  text-align: center;
}

.image-placeholder img {
  display: block;
  margin: 0 auto;
  border-radius: var(--r-sm);
}

/* -------------------------------------------------- per-question result -- */

[data-exam="4"] .result,
[data-exam="5"] .result {
  display: none;
  margin-top: 14px;
  animation: sgReveal 340ms var(--ease) both;
}

.result .correct,
.result .incorrect,
.correct:not(.option):not(.explanation),
.incorrect:not(.option) {
  padding: 13px 15px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 0.9rem;
  font-weight: 600;
}

.result .correct,
.correct:not(.option):not(.explanation) {
  border-color: var(--ok-line);
  background: var(--ok-soft);
  color: var(--ok-ink);
}

.result .incorrect,
.incorrect:not(.option) {
  border-color: var(--bad-line);
  background: var(--bad-soft);
  color: var(--bad-ink);
}

.result .explanation {
  margin-top: 10px;
  border-color: var(--border);
  border-left-color: currentColor;
  background: var(--surface);
  font-weight: 400;
}

.answer-feedback {
  display: none;
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 0.9rem;
  font-weight: 650;
  animation: sgReveal 340ms var(--ease) both;
}

.answer-feedback.correct-answer {
  border-color: var(--ok-line);
  background: var(--ok-soft);
  color: var(--ok-ink);
}

.answer-feedback.wrong-answer {
  border-color: var(--bad-line);
  background: var(--bad-soft);
  color: var(--bad-ink);
}

/* -------------------------------------------------------- essay scoring -- */

.essayPanel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.essayScore {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 0.88rem;
}

.essayScore.good {
  border-color: var(--ok-line);
  background: var(--ok-soft);
}

.essayScore.mid {
  border-color: var(--warn-line);
  background: var(--warn-soft);
}

.essayScore.bad {
  border-color: var(--bad-line);
  background: var(--bad-soft);
}

.essayScore .kv {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.essayScore .kv .label {
  color: var(--text-2);
  font-weight: 650;
}

.essayScore .kv .val {
  color: var(--text);
  font-size: 1.4rem;
  font-weight: 700;
}

.kwRow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.kw {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.72rem;
  font-weight: 650;
}

.kw.found {
  border-color: var(--ok-line);
  background: var(--ok-soft);
  color: var(--ok-ink);
}

.kw.miss {
  color: var(--text-3);
}

/* -------------------------------------------------------------- buttons -- */

.btn,
.submit-btn,
.show-answers-btn,
.reset-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  font-family: inherit;
  font-size: 0.94rem;
  font-weight: 650;
  letter-spacing: 0.005em;
  line-height: 1.2;
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition:
    transform 160ms var(--ease),
    box-shadow 160ms var(--ease),
    filter 160ms var(--ease),
    background-color 160ms var(--ease),
    border-color 160ms var(--ease),
    opacity 160ms var(--ease);
}

.btn:hover,
.submit-btn:hover,
.show-answers-btn:hover,
.reset-btn:hover {
  transform: translateY(-2px);
  filter: saturate(1.06);
  box-shadow: 0 18px 34px -14px rgba(109, 74, 255, 0.6);
}

.btn:active,
.submit-btn:active,
.show-answers-btn:active,
.reset-btn:active {
  transform: translateY(0);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.45;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.submit-btn,
.show-answers-btn {
  display: flex;
  width: 100%;
  margin-top: 8px;
  padding: 15px 24px;
  font-size: 1rem;
}

.submit-section {
  margin-top: 22px;
}

.reset-btn {
  margin-top: 16px;
}

.btn.secondary,
.btn-prev,
.btn-review {
  background: var(--surface);
  border-color: var(--border-2);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.btn.secondary:hover,
.btn-prev:hover,
.btn-review:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  box-shadow: var(--shadow);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
}

.controls .btn {
  flex: 1 1 auto;
  min-width: 140px;
}

.btn-restart,
.btn-review {
  margin: 6px 4px 0;
}

#submitWrap .btn {
  width: 100%;
}

.rowCenter {
  display: flex;
  justify-content: center;
}

/* -------------------------------------------------------------- results -- */

.results,
.score-container,
[data-exam="7"] .result,
[data-exam="8"] .result,
[data-exam="10"] .result,
.results-screen {
  display: none;
  margin-top: 20px;
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-xl);
  background:
    linear-gradient(140deg, var(--accent-soft), transparent 60%), var(--surface);
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: sgPop 420ms var(--ease) both;
}

.results.show,
.results-screen.active {
  display: block;
}

.results h2,
.score-container h2,
[data-exam="7"] .result h2,
[data-exam="8"] .result h2,
[data-exam="10"] .result h2 {
  margin-bottom: 12px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.score,
.score-value,
.score-display,
.scorePct {
  display: block;
  margin: 0 0 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(2.1rem, 1.4rem + 3vw, 3rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.results p,
.score-container p,
.results-message {
  margin: 0;
  color: var(--text-2);
  font-size: 0.95rem;
}

.score-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 138px;
  height: 138px;
  margin: 0 auto 18px;
  border: 1px solid var(--accent-line);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 30%, var(--accent-soft), transparent 70%),
    var(--surface);
  box-shadow: var(--shadow);
  animation: sgPop 520ms var(--ease) both;
}

.score-circle.band-good {
  border-color: var(--ok-line);
  background:
    radial-gradient(circle at 50% 30%, var(--ok-soft), transparent 70%),
    var(--surface);
}

.score-circle.band-mid {
  border-color: var(--warn-line);
  background:
    radial-gradient(circle at 50% 30%, var(--warn-soft), transparent 70%),
    var(--surface);
}

.score-circle.band-low {
  border-color: var(--bad-line);
  background:
    radial-gradient(circle at 50% 30%, var(--bad-soft), transparent 70%),
    var(--surface);
}

.score-circle.band-good .score-number {
  background-image: linear-gradient(135deg, var(--ok), var(--ok-ink));
}

.score-circle.band-mid .score-number {
  background-image: linear-gradient(135deg, var(--warn), var(--warn-ink));
}

.score-circle.band-low .score-number {
  background-image: linear-gradient(135deg, var(--bad), var(--bad-ink));
}

.score-number {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 2.6rem;
  font-weight: 750;
  line-height: 1;
}

.score-label {
  margin-top: 4px;
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.results-message {
  margin-bottom: 18px;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
}

.results-details {
  max-width: 340px;
  margin: 0 auto 18px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-2);
  text-align: left;
}

.detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.88rem;
}

.detail-row:last-child {
  border-bottom: 0;
}

.detail-row span:last-child {
  color: var(--text);
  font-weight: 700;
}

/* Quiz 1 score banner */
.scoreBox {
  display: none;
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(140deg, var(--accent-soft), transparent 60%),
    var(--surface-2);
  animation: sgPop 420ms var(--ease) both;
}

.scoreRow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
}

.scoreTitle {
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* --------------------------------------------------------- theme toggle -- */

/* html-theme-sync.js injects its own .sg-theme-toggle rules at runtime, after
   this file. The doubled class outranks them without reaching for !important. */
.sg-theme-toggle.sg-theme-toggle {
  position: fixed;
  inset: 14px 14px auto auto;
  z-index: 99999;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: auto;
  height: 36px;
  padding: 0 14px 0 11px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  transition:
    transform 200ms var(--ease),
    border-color 200ms var(--ease),
    color 200ms var(--ease),
    background-color 200ms var(--ease);
}

.sg-theme-toggle.sg-theme-toggle:hover,
.sg-theme-toggle.sg-theme-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent-line);
  color: var(--text);
}

.sg-theme-toggle svg {
  display: block;
  width: 15px;
  height: 15px;
  transition:
    transform 320ms var(--ease),
    opacity 200ms var(--ease);
}

.sg-theme-toggle .sg-icon-sun {
  display: none;
}

html[data-theme="dark"] .sg-theme-toggle .sg-icon-sun {
  display: block;
}

html[data-theme="dark"] .sg-theme-toggle .sg-icon-moon {
  display: none;
}

.sg-theme-toggle:hover svg {
  transform: rotate(-18deg);
}

[dir="rtl"] .sg-theme-toggle.sg-theme-toggle,
html[lang="ar"] .sg-theme-toggle.sg-theme-toggle {
  inset: 14px auto auto 14px;
}

/* ----------------------------------------------------------- animations -- */

@keyframes sgRise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sgSlideIn {
  from {
    opacity: 0;
    transform: translateX(14px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes sgReveal {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sgPop {
  from {
    opacity: 0;
    transform: scale(0.96);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Gentle stagger for the first cards in view. */
.exam-content > .question-block:nth-child(-n + 6),
.quiz-content > .question-card:nth-child(-n + 6),
.content > form > .question-card:nth-child(-n + 6),
.section > .question:nth-child(-n + 6) {
  animation-delay: calc(40ms * var(--i, 1));
}

.exam-content > .question-block:nth-child(1) {
  --i: 1;
}

.exam-content > .question-block:nth-child(2) {
  --i: 2;
}

.exam-content > .question-block:nth-child(3) {
  --i: 3;
}

.exam-content > .question-block:nth-child(4) {
  --i: 4;
}

.exam-content > .question-block:nth-child(5) {
  --i: 5;
}

.exam-content > .question-block:nth-child(6) {
  --i: 6;
}

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

/* --------------------------------------------------------------- small -- */

@media (max-width: 640px) {
  body {
    font-size: 14.5px;
  }

  .controls {
    flex-direction: column;
  }

  .controls .btn {
    width: 100%;
  }

  .sg-theme-toggle.sg-theme-toggle {
    inset: 10px 10px auto auto;
  }
}