/* ==========================================================================
   Real-World Logical Thinking & System Design Challenge
   Visual identity: an official assessment booklet — warm paper, ink navy,
   a brass accent, serif display paired with a plain working sans. No
   external fonts (must run with zero network access on an office LAN).
   ========================================================================== */

:root {
  --paper: #f6f1e7;
  --paper-raised: #fbf8f2;
  --ink: #23262b;
  --ink-soft: #5a5750;
  --rule: #d8cfbb;
  --rule-strong: #b7ab8e;
  --brass: #9c6b1f;
  --brass-dark: #7a5216;
  --brass-tint: #f1e3c6;
  --good: #3f6b4a;
  --danger: #a13b2e;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --sans: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --mono: "Consolas", "SFMono-Regular", Menlo, Consolas, monospace;
  --shadow: 0 1px 2px rgba(35, 38, 43, 0.06), 0 8px 24px -12px rgba(35, 38, 43, 0.25);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  background-image:
    radial-gradient(ellipse at top left, rgba(156, 107, 31, 0.05), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(156, 107, 31, 0.04), transparent 50%);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.01em;
}

a {
  color: var(--brass-dark);
}

button {
  font-family: var(--sans);
}

/* -- Layout shells ---------------------------------------------------- */

.sheet {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.paper-card {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: var(--shadow);
  padding: 40px 44px;
  position: relative;
}

.paper-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid var(--rule);
  pointer-events: none;
  opacity: 0.6;
}

@media (max-width: 600px) {
  .paper-card { padding: 28px 20px; }
  .paper-card::before { inset: 6px; }
  .sheet { padding: 28px 14px 72px; }
}

/* -- Masthead ----------------------------------------------------------- */

.masthead {
  text-align: center;
  margin-bottom: 36px;
}

.masthead .eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 10px;
}

.masthead h1 {
  font-size: 30px;
  line-height: 1.15;
}

.masthead h1 .line2 {
  display: block;
  font-size: 20px;
  color: var(--ink-soft);
  font-weight: 400;
  font-style: italic;
  margin-top: 2px;
}

.masthead .tagline {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 28px 0;
}

.rule--heavy {
  border-top: 2px solid var(--ink);
  margin: 20px 0 28px;
}

/* -- Section labels ------------------------------------------------------ */

.section-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass-dark);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--rule);
}

.objective p {
  color: var(--ink);
  margin: 0 0 24px;
}

.instructions {
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
}

.instructions li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--ink);
}

.instructions li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--brass);
}

/* -- Schedule strip ------------------------------------------------------ */

.schedule {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 24px 0 32px;
}

.schedule .slot {
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 10px 6px;
  text-align: center;
  background: var(--paper);
}

.schedule .slot .num {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--brass-dark);
}

.schedule .slot .min {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  margin-top: 2px;
}

@media (max-width: 600px) {
  .schedule { grid-template-columns: repeat(5, 1fr); gap: 5px; }
  .schedule .slot { padding: 7px 2px; }
  .schedule .slot .num { font-size: 14px; }
}

/* -- Start form ----------------------------------------------------------- */

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 28px;
}

@media (max-width: 560px) {
  .field-grid { grid-template-columns: 1fr; }
}

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  border-radius: 2px;
  padding: 10px 12px;
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--ink);
}

.field select {
  cursor: pointer;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brass);
  box-shadow: 0 0 0 3px var(--brass-tint);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper-raised);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 14px -6px rgba(35,38,43,0.5); }
.btn:active { transform: translateY(0); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
}

.btn--brass {
  border-color: var(--brass-dark);
  background: var(--brass-dark);
}

.btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.btn-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
}

/* -- Assessment chrome: timer + progress rail ----------------------------- */

.exam-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--ink);
  color: var(--paper-raised);
  padding: 10px 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.25);
}

.exam-bar-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.exam-bar .who {
  font-size: 12.5px;
  color: #c9c4b8;
}
.exam-bar .who strong { color: var(--paper-raised); }

.clock {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: 0.04em;
  background: #15171b;
  border: 1px solid #3a3d42;
  padding: 4px 12px;
  border-radius: 2px;
  color: var(--brass-tint);
}

.clock.low { color: #f3b9a8; border-color: var(--danger); }

.progress-rail {
  display: flex;
  gap: 6px;
  margin: 24px 0 8px;
}

.progress-rail .tab {
  flex: 1;
  text-align: center;
  padding: 8px 4px;
  font-family: var(--mono);
  font-size: 11px;
  border: 1px solid var(--rule);
  border-bottom: 3px solid var(--rule);
  background: var(--paper);
  color: var(--ink-soft);
}

.progress-rail .tab.current {
  border-bottom-color: var(--brass);
  color: var(--ink);
  font-weight: 700;
  background: var(--brass-tint);
}

.progress-rail .tab.done {
  color: var(--good);
}

.progress-rail .tab.done::after {
  content: " \2713";
}

/* -- Problem card --------------------------------------------------------- */

.problem-head {
  margin-bottom: 20px;
}

.problem-head .problem-no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--brass-dark);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.problem-head h2 {
  font-size: 24px;
  margin-top: 4px;
}

.focus-tags {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.focus-tags span {
  font-family: var(--mono);
  font-size: 10.5px;
  border: 1px solid var(--rule-strong);
  color: var(--ink-soft);
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--paper);
}

.statement {
  background: var(--brass-tint);
  border-left: 3px solid var(--brass);
  padding: 16px 18px;
  margin: 18px 0 28px;
  font-size: 14.5px;
  color: #40331a;
}

.question-block {
  margin-bottom: 22px;
}

.question-block .q-row {
  display: flex;
  gap: 12px;
  margin-bottom: 8px;
}

.q-num {
  flex: none;
  width: 26px;
  height: 26px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
}

.q-text {
  padding-top: 3px;
  font-size: 14.5px;
}

.question-block textarea {
  width: 100%;
  min-height: 84px;
  margin-left: 38px;
  width: calc(100% - 38px);
  resize: vertical;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  border-radius: 2px;
  padding: 10px 12px;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
}

.question-block textarea:focus {
  outline: none;
  border-color: var(--brass);
  box-shadow: 0 0 0 3px var(--brass-tint);
}

.bonus-block {
  margin-top: 32px;
  border-top: 1px dashed var(--rule-strong);
  padding-top: 20px;
}

.bonus-ribbon {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brass-dark);
  border: 1px solid var(--brass);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.bonus-block textarea {
  width: 100%;
  min-height: 70px;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  border-radius: 2px;
  padding: 10px 12px;
  font-family: var(--sans);
  font-size: 14px;
  margin-top: 8px;
}

/* -- Submit / done screen -------------------------------------------------- */

.stamp {
  width: 96px;
  height: 96px;
  border: 3px solid var(--good);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transform: rotate(-8deg);
  color: var(--good);
}

.stamp svg { width: 46px; height: 46px; }

.done-screen {
  text-align: center;
}

.done-screen h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.done-screen p {
  color: var(--ink-soft);
  max-width: 480px;
  margin: 0 auto 10px;
}

.filename-chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  padding: 6px 12px;
  border-radius: 2px;
  margin: 14px 0 26px;
}

/* -- Small print / footer -------------------------------------------------- */

.footnote {
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 28px;
}

.footnote a { color: var(--ink-soft); }

/* -- Autosave indicator ----------------------------------------------------- */

.autosave-note {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-soft);
  text-align: right;
  margin-top: 6px;
  min-height: 14px;
}

/* ==========================================================================
   Evaluator dashboard — cooler slate tone, distinct from the participant
   "paper" view so it reads clearly as the admin/review mode.
   ========================================================================== */

body.evaluator {
  --paper: #eef1f3;
  --paper-raised: #ffffff;
  --ink: #1d2430;
  --ink-soft: #5b6472;
  --rule: #d6dbe1;
  --rule-strong: #b9c1ca;
  --brass: #3c6e8f;
  --brass-dark: #2c5873;
  --brass-tint: #e2edf3;
  --good: #3f6b4a;
}

.eval-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.eval-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.eval-header h1 {
  font-size: 22px;
}

.eval-header .back {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  text-decoration: none;
  border: 1px solid var(--rule-strong);
  padding: 6px 12px;
  border-radius: 2px;
}

.drop-zone {
  border: 2px dashed var(--rule-strong);
  border-radius: 4px;
  padding: 28px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13.5px;
  margin-bottom: 24px;
  background: var(--paper-raised);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.drop-zone.drag-over {
  border-color: var(--brass);
  background: var(--brass-tint);
}

.drop-zone input { display: none; }

.eval-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 860px) {
  .eval-layout { grid-template-columns: 1fr; }
}

.roster {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}

.roster-empty {
  padding: 24px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  text-align: center;
}

.roster-item {
  padding: 12px 14px;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
}

.roster-item:last-child { border-bottom: none; }

.roster-item:hover { background: var(--brass-tint); }

.roster-item.active {
  background: var(--brass-dark);
  color: #fff;
}

.roster-item .r-name {
  font-weight: 600;
  font-size: 14px;
}

.roster-item .r-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  opacity: 0.75;
  margin-top: 3px;
}

.roster-item .r-score {
  font-family: var(--mono);
  font-size: 11px;
  margin-top: 4px;
  color: var(--good);
}

.roster-item.active .r-score { color: #bfe3c8; }

.detail-panel {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 24px 28px;
}

.detail-empty {
  color: var(--ink-soft);
  text-align: center;
  padding: 60px 20px;
}

.detail-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.detail-top h2 { font-size: 20px; }

.detail-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-soft);
}

.total-badge {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--brass-dark);
  border: 2px solid var(--brass-dark);
  border-radius: 6px;
  padding: 4px 16px;
  white-space: nowrap;
}

.total-badge small {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  display: block;
  color: var(--ink-soft);
}

.eval-problem {
  border-top: 1px solid var(--rule);
  padding: 20px 0;
}

.eval-problem h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.eval-problem .ep-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.eval-qa {
  margin: 14px 0;
  font-size: 13.5px;
}

.eval-qa .q {
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.eval-qa .q::before {
  content: "Q. ";
  font-weight: 700;
  color: var(--brass-dark);
}

.eval-qa .a {
  background: var(--paper);
  border-left: 3px solid var(--rule-strong);
  padding: 10px 14px;
  white-space: pre-wrap;
  border-radius: 0 2px 2px 0;
}

.eval-qa .a.empty {
  color: #a0a7b0;
  font-style: italic;
}

.rubric {
  margin-top: 16px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 14px 16px;
}

.rubric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  font-size: 13px;
}

.rubric-row select {
  font-family: var(--mono);
  font-size: 13px;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 3px 6px;
  background: #fff;
}

.rubric-total {
  text-align: right;
  font-family: var(--mono);
  font-size: 12.5px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--rule-strong);
  color: var(--ink);
}

.feedback-grid {
  margin-top: 24px;
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}

.feedback-field { margin-bottom: 14px; }

.feedback-field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 5px;
}

.feedback-field textarea {
  width: 100%;
  min-height: 56px;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 8px 10px;
  font-family: var(--sans);
  font-size: 13.5px;
}

.eval-actions {
  margin-top: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Copy/inspect deterrents (exam screen content) — see js/lockdown.js
   ========================================================================== */

.masthead,
.objective,
.instructions,
.schedule,
.problem-head,
.statement,
.focus-tags,
.question-block .q-text,
.bonus-ribbon,
#bonusText {
  user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}

.question-block textarea,
.bonus-block textarea,
input,
select {
  user-select: text;
  -webkit-user-select: text;
  -ms-user-select: text;
}