/* ==========================================================================
   AI in the Workplace — Lesson 1
   Theme: professional technology / cybersecurity console
   ========================================================================== */

:root {
  --color-black: #000000;
  --color-tan: #86745c;
  --color-light-tan: #c2baab;
  --color-dark-tan: #6a5c48;
  --color-white: #ffffff;
  --color-gold: #d4af37;

  /* functional tints, kept muted so they sit inside the given palette */
  --color-success-bg: #eef3ea;
  --color-success-border: #5b7a4f;
  --color-success-text: #33481f;
  --color-error-bg: #f7ecea;
  --color-error-border: #9a4a3a;
  --color-error-text: #6e2f22;
  --color-info-bg: #f1eee7;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --radius: 3px;
  --border-hairline: 1px solid var(--color-light-tan);
  --max-width: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-black);
  background: var(--color-white);
  line-height: 1.55;
  font-size: 17px;
}

h1, h2, h3, h4 {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-black);
}

h2 { font-size: 1.5rem; margin: 0 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 0.5rem; }

p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1rem; padding-left: 1.3rem; }
li { margin-bottom: 0.4rem; }

code {
  font-family: var(--font-mono);
  background: var(--color-info-bg);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  font-size: 0.92em;
}

/* ---------------- Skip link & focus ---------------- */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-gold);
  color: var(--color-black);
  padding: 0.6rem 1rem;
  z-index: 1000;
  font-weight: 600;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---------------- Header ---------------- */

.site-header {
  background: var(--color-black);
  color: var(--color-white);
  padding: 1.1rem 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  padding-bottom: 0.9rem;
}

.header-course {
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-light-tan);
}

.course-title { font-weight: 700; letter-spacing: 0.02em; color: var(--color-gold); }
.course-instructor { color: var(--color-light-tan); }

.header-lesson {
  text-align: right;
  flex: 1 1 260px;
}

.lesson-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-light-tan);
  margin-bottom: 0.15rem;
}

.lesson-title {
  color: var(--color-white);
  font-size: 1.3rem;
  margin: 0;
}

.progress-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-bottom: 0.85rem;
}

.progress-track {
  height: 8px;
  background: var(--color-dark-tan);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-gold);
  transition: width 0.35s ease;
  border-radius: 999px;
}

.progress-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-light-tan);
  margin-top: 0.4rem;
}

/* ---------------- Main / panels ---------------- */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.75rem 1.25rem 4rem;
}

.panel-card {
  background: var(--color-white);
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: 1.6rem 1.6rem 1.9rem;
}

.panel-hero .lede {
  font-size: 1.05rem;
  color: var(--color-dark-tan);
}

.lede { font-size: 1.02rem; }

.section-kind {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.8rem;
}

.section-kind-learn {
  background: var(--color-info-bg);
  color: var(--color-dark-tan);
  border: 1px solid var(--color-light-tan);
}

.section-kind-graded {
  background: var(--color-black);
  color: var(--color-gold);
}

.scenario-box {
  border-left: 3px solid var(--color-tan);
  background: var(--color-info-bg);
  padding: 0.9rem 1.1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.1rem 0;
}
.scenario-box h3 { margin-top: 0; }

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.1rem 0 0.4rem;
}

.info-card {
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}
.info-card h3 { margin-top: 0; font-size: 0.95rem; text-transform: none; color: var(--color-dark-tan); }
.info-card p { margin-bottom: 0; }

.objectives-list li::marker { color: var(--color-tan); }

/* ---------------- Forms ---------------- */

.name-form {
  margin-top: 1.6rem;
  padding-top: 1.4rem;
  border-top: var(--border-hairline);
}

.form-hint { color: var(--color-dark-tan); font-size: 0.92rem; }

.form-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.field {
  flex: 1 1 200px;
  display: flex;
  flex-direction: column;
  margin-bottom: 0.9rem;
}

.field label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

input[type="text"], textarea, select.select-input {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.6rem 0.7rem;
  border: 1.5px solid var(--color-light-tan);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-black);
}

input[type="text"]:focus, textarea:focus, select.select-input:focus {
  border-color: var(--color-tan);
}

textarea { width: 100%; resize: vertical; font-family: var(--font-body); }

.field-error {
  color: var(--color-error-text);
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

/* ---------------- Buttons ---------------- */

.btn {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--color-black);
  color: var(--color-gold);
  border-color: var(--color-black);
}
.btn-primary:hover:not(:disabled) { background: var(--color-dark-tan); border-color: var(--color-dark-tan); }
.btn-primary:disabled { background: var(--color-light-tan); border-color: var(--color-light-tan); color: var(--color-white); cursor: not-allowed; }

.btn-secondary {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-tan);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-info-bg); }

.btn-danger {
  background: var(--color-error-text);
  color: var(--color-white);
  border-color: var(--color-error-text);
}
.btn-danger:hover { background: #501f16; }

.btn-reset {
  background: transparent;
  color: var(--color-light-tan);
  border-color: var(--color-dark-tan);
  font-size: 0.85rem;
  padding: 0.45rem 0.9rem;
}
.btn-reset:hover { color: var(--color-white); border-color: var(--color-tan); }

.step-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: var(--border-hairline);
}

.activity-controls {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
  padding-top: 1.2rem;
  border-top: var(--border-hairline);
}

.activity-feedback {
  font-size: 0.92rem;
  font-weight: 600;
}
.activity-feedback[data-tone="good"] { color: var(--color-success-text); }
.activity-feedback[data-tone="bad"] { color: var(--color-error-text); }

/* ---------------- Flashcards ---------------- */

.flashcard-heading { margin-top: 1.8rem; }

.flashcard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 0.8rem;
  margin: 0.9rem 0;
}

.flashcard {
  border: var(--border-hairline);
  border-radius: var(--radius);
  background: var(--color-white);
  padding: 0;
  cursor: pointer;
  text-align: left;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.9rem 1rem;
  font-family: var(--font-body);
}

.flashcard[aria-pressed="true"] {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.flashcard .term {
  font-weight: 700;
  font-size: 1rem;
}
.flashcard .definition {
  font-size: 0.88rem;
  margin-top: 0.4rem;
  color: var(--color-light-tan);
}
.flashcard:not([aria-pressed="true"]) .definition { display: none; }
.flashcard[aria-pressed="true"] .term { color: var(--color-gold); }

.practice-status {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-dark-tan);
}

/* ---------------- Classification activity ---------------- */

.activity-instructions {
  background: var(--color-info-bg);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.94rem;
}

.classify-item {
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin-bottom: 0.8rem;
}

.classify-item.state-correct { border-color: var(--color-success-border); background: var(--color-success-bg); }
.classify-item.state-incorrect { border-color: var(--color-error-border); background: var(--color-error-bg); }

.classify-item p.item-text { font-weight: 600; margin-bottom: 0.6rem; }

.choice-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.choice-pill {
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1.5px solid var(--color-light-tan);
  background: var(--color-white);
  cursor: pointer;
}
.choice-pill[aria-pressed="true"] {
  background: var(--color-black);
  color: var(--color-gold);
  border-color: var(--color-black);
}

.item-explanation {
  margin-top: 0.6rem;
  font-size: 0.88rem;
  color: var(--color-dark-tan);
  display: none;
}
.classify-item.revealed .item-explanation { display: block; }

.item-mark {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  margin-left: 0.5rem;
}
.state-correct .item-mark { color: var(--color-success-text); }
.state-incorrect .item-mark { color: var(--color-error-text); }

/* ---------------- Sequencing activity ---------------- */

.sequence-wrap { margin: 1rem 0; }
.sequence-heading { margin-top: 1.2rem; }

.sequence-slots {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sequence-slot {
  min-height: 52px;
  border: 1.5px dashed var(--color-light-tan);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  padding: 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-dark-tan);
  gap: 0.7rem;
}

.sequence-slot .slot-num {
  font-weight: 700;
  color: var(--color-tan);
}

.sequence-slot.filled {
  border-style: solid;
  border-color: var(--color-tan);
  background: var(--color-white);
  cursor: pointer;
  color: var(--color-black);
}

.sequence-slot.state-correct { border-color: var(--color-success-border); background: var(--color-success-bg); }
.sequence-slot.state-incorrect { border-color: var(--color-error-border); background: var(--color-error-bg); }

.sequence-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.sequence-chip {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  border: 1.5px solid var(--color-tan);
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
  background: var(--color-white);
  cursor: pointer;
}
.sequence-chip:hover { background: var(--color-info-bg); }
.sequence-chip[hidden] { display: none; }

/* ---------------- Evaluation / oversight lists ---------------- */

.eval-item, .oversight-item {
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}
.eval-item.state-correct, .oversight-item.state-correct { border-color: var(--color-success-border); background: var(--color-success-bg); }
.eval-item.state-incorrect, .oversight-item.state-incorrect { border-color: var(--color-error-border); background: var(--color-error-bg); }

.eval-item h3, .oversight-item h3 { margin-top: 0; font-size: 1rem; }

.oversight-item .sub-question { margin-top: 0.9rem; }
.sub-question p { font-weight: 600; font-size: 0.92rem; margin-bottom: 0.5rem; }

.justify-box {
  margin: 1.4rem 0;
  padding-top: 1.2rem;
  border-top: var(--border-hairline);
}
.justify-box label { display: block; font-weight: 600; margin-bottom: 0.6rem; }

.char-hint {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-dark-tan);
  margin: 0.4rem 0 0;
}

/* ---------------- Knowledge check ---------------- */

.knowledge-item {
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}
.knowledge-item.state-correct { border-color: var(--color-success-border); background: var(--color-success-bg); }
.knowledge-item.state-incorrect { border-color: var(--color-error-border); background: var(--color-error-bg); }
.knowledge-item h3 { margin-top: 0; font-size: 1rem; }

.option-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.option-row {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  border: 1px solid var(--color-light-tan);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  cursor: pointer;
}
.option-row:hover { background: var(--color-info-bg); }
.option-row input { margin-top: 0.25rem; }
.option-row.selected { border-color: var(--color-tan); background: var(--color-info-bg); }

/* ---------------- Reflection & completion ---------------- */

.reflection-box { margin-bottom: 1.6rem; }
.reflection-box label { display: block; font-weight: 600; margin-bottom: 0.6rem; }

.score-summary {
  background: var(--color-info-bg);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
}
.score-summary h3 { margin-top: 0; }

.score-breakdown { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.92rem; }
.score-row { display: flex; justify-content: space-between; font-family: var(--font-mono); }

.score-total {
  font-weight: 700;
  font-size: 1.1rem;
  margin-top: 0.8rem;
  margin-bottom: 0.2rem;
}

.score-status { font-weight: 600; }
.score-status[data-tone="good"] { color: var(--color-success-text); }
.score-status[data-tone="bad"] { color: var(--color-error-text); }

.completion-panel {
  margin-top: 1.6rem;
  padding: 1.2rem 1.3rem;
  border: 2px solid var(--color-gold);
  border-radius: var(--radius);
  background: var(--color-white);
}
.completion-panel h3 { margin-top: 0; }
.verification-line { font-size: 0.85rem; color: var(--color-dark-tan); }
.completion-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 0.8rem; }
.pdf-fallback-note {
  margin-top: 0.8rem;
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error-text);
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
}

/* ---------------- Footer ---------------- */

.site-footer {
  border-top: var(--border-hairline);
  padding: 1.4rem 1.25rem 2rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  align-items: flex-start;
}
.footer-note {
  font-size: 0.82rem;
  color: var(--color-dark-tan);
  margin: 0;
}

/* ---------------- Modal ---------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 200;
}
.modal-overlay[hidden] {
  display: none;
}
.modal-box {
  background: var(--color-white);
  border-radius: var(--radius);
  border: 2px solid var(--color-gold);
  max-width: 420px;
  width: 100%;
  padding: 1.4rem 1.5rem;
}
.modal-box h2 { margin-top: 0; }
.modal-actions { display: flex; gap: 0.8rem; margin-top: 1.2rem; justify-content: flex-end; }

/* ---------------- Responsive ---------------- */

@media (max-width: 640px) {
  body { font-size: 16px; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .header-lesson { text-align: left; }
  .info-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .panel-card { padding: 1.2rem 1.1rem 1.5rem; }
  .step-nav, .activity-controls { flex-direction: column; align-items: stretch; }
  .step-nav .btn, .activity-controls .btn { width: 100%; }
  .completion-actions { flex-direction: column; }
  .completion-actions .btn { width: 100%; }
}

@media (min-width: 641px) and (max-width: 1024px) {
  main { padding-left: 1.5rem; padding-right: 1.5rem; }
}

/* print */
@media print {
  .site-header, .site-footer, .step-nav, .activity-controls, #reset-btn { display: none !important; }
}