/* ============================================================
   Journeyman NEC Exam Prep — PSI-style interface
   ============================================================ */

:root {
  --bg:           #050505;            /* near-black page bg */
  --panel:        #0e0f11;            /* card surface */
  --panel-alt:    #15171a;            /* secondary panel */
  --text:         #f4f6f8;            /* near-white body text */
  --muted:        #9aa0a8;            /* secondary text */
  --accent:       #b8ec22;            /* lime/electric green — Buckworks signature */
  --accent-dark:  #99c91d;            /* darker hover */
  --accent-glow:  rgba(184, 236, 34, 0.35);
  --success:      #b8ec22;
  --danger:       #ff4d4d;
  --warning:      #f7b500;
  --flag:         #f7b500;
  --border:       #1f2126;            /* thin card border */
  --border-strong:#2c2f36;
  --code-bg:      #15171a;
  --code-text:    #b8ec22;
  --shadow:       0 8px 26px rgba(0, 0, 0, 0.55);
  --shadow-glow:  0 0 0 1px rgba(184, 236, 34, 0.18), 0 8px 26px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

h1, h2, h3 { margin: 0 0 8px; }
h1 { font-size: 1.8rem; }
h2 { font-size: 1.25rem; color: var(--muted); font-weight: 500; }
h3 { font-size: 1rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }

/* ============ Screens ============ */
.screen { display: none; }
.screen.active { display: block; }

/* ============ Start Screen ============ */
#start-screen { padding: 40px 20px; }
.card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--panel);
  padding: 32px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.info-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 24px 0;
}
.info-box {
  background: var(--panel-alt);
  padding: 14px 10px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--border);
}
.info-box b {
  display: block;
  font-size: 1.4rem;
  color: var(--accent);
}
.info-box span {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.exam-blueprint {
  background: rgba(184, 236, 34, 0.08);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  margin: 0 0 24px;
  font-size: 13px;
  color: var(--text);
  border-radius: 0 6px 6px 0;
  line-height: 1.5;
}
.exam-blueprint b { color: var(--accent-dark); }

.settings {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}
.setting label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}
.setting select,
.setting input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  background: var(--panel);
}
.setting input[type="checkbox"] { margin-right: 6px; }

/* ============ Buttons ============ */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: 6px;
  transition: all 0.15s;
}
.btn-primary {
  background: var(--accent); color: #050505;
  width: 100%;
  padding: 14px;
  font-size: 1rem;
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary {
  background: #e8ebf2;
  color: var(--text);
}
.btn-secondary:hover { background: #dbdfe9; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--panel-alt); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover { background: var(--danger); color: white; }

.btn-reveal {
  background: var(--warning);
  color: #3a2a00;
  padding: 8px 16px;
  font-size: 0.88rem;
}
.btn-reveal:hover { background: #d28908; }

/* ============ Help/Details ============ */
.help {
  margin-top: 24px;
  padding: 16px;
  background: var(--panel-alt);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.help summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
}
.help-body { margin-top: 14px; font-size: 0.9rem; }
.help-body ol, .help-body ul { padding-left: 22px; }
.help-body li { margin: 5px 0; }
.chapter-list { list-style: none; padding: 0; }
.chapter-list li { padding: 4px 0; border-bottom: 1px dashed var(--border); }

/* ============ Exam Screen ============ */
#exam-screen.active {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.exam-header {
  background: #1e2230;
  color: white;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.timer-group {
  display: flex;
  align-items: center;
  gap: 14px;
}
.timer {
  font-family: "SF Mono", Monaco, "Courier New", monospace;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--warning);
  min-width: 110px;
}
.timer.warning { color: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: 0.5; } }

/* Per-Question timer pill */
.per-q-timer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
}
.per-q-timer .pq-label {
  color: #c0c4d0;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.per-q-timer .pq-time {
  font-family: "SF Mono", Monaco, "Courier New", monospace;
  font-weight: 700;
  font-size: 1rem;
  color: #7fd6ff;
  min-width: 42px;
}
.per-q-timer.warning .pq-time { color: #ffb74d; }
.per-q-timer.expired .pq-time { color: var(--danger); animation: pulse 0.8s infinite; }
.per-q-timer .pq-close {
  background: transparent;
  color: #c0c4d0;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  cursor: pointer;
  line-height: 1;
  width: 18px; height: 18px;
  border-radius: 3px;
}
.per-q-timer .pq-close:hover { background: rgba(255,255,255,0.15); color: white; }

.pq-enable {
  background: rgba(255,255,255,0.08);
  color: #c0c4d0;
  border: 1px dashed rgba(255,255,255,0.25);
  padding: 5px 10px;
  font-size: 0.8rem;
  font-weight: 500;
}
.pq-enable:hover { background: rgba(255,255,255,0.15); color: white; }

.progress {
  font-size: 0.95rem;
  color: #c0c4d0;
}

.header-actions { display: flex; gap: 10px; }
.header-actions button { padding: 7px 14px; font-size: 0.85rem; }
.exam-header .btn-ghost { color: white; border-color: rgba(255,255,255,0.3); }
.exam-header .btn-ghost:hover { background: rgba(255,255,255,0.1); }

.exam-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  padding: 24px;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
}

.question-area {
  background: var(--panel);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.question-number {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 10px;
}

.question-text {
  font-size: 1.05rem;
  line-height: 1.55;
  margin-bottom: 24px;
  font-weight: 500;
}

.choices {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.choices li {
  margin-bottom: 10px;
}
.choices label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.12s;
  background: var(--panel);
}
.choices label:hover { border-color: var(--accent); background: rgba(184, 236, 34, 0.08); }
.choices input[type="radio"] { margin-top: 3px; flex-shrink: 0; }
.choices input[type="radio"]:checked + .choice-letter { background: var(--accent); color: #050505; }
.choice-letter {
  display: inline-flex;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--code-bg);
  color: var(--accent);
  font-weight: 700;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: all 0.12s;
}
.choices label.selected {
  border-color: var(--accent);
  background: #eef5ff;
}
.choices label.selected .choice-letter {
  background: var(--accent); color: #050505;
}
.choices label.correct {
  border-color: var(--success);
  background: #e9f7ed;
}
.choices label.correct .choice-letter {
  background: var(--success); color: white;
}
.choices label.incorrect {
  border-color: var(--danger);
  background: #fbeaea;
}

/* Process of elimination (strike-through) */
.choices label .choice-text { flex: 1; }
.strike-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 28px; height: 28px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  opacity: 0.55;
  transition: all 0.12s;
}
.strike-btn:hover {
  opacity: 1;
  background: #fbeaea;
  border-color: var(--danger);
  color: var(--danger);
}
.choices label.eliminated {
  background: #f5f5f7;
  border-color: var(--border);
  opacity: 0.75;
}
.choices label.eliminated .choice-text,
.choices label.eliminated .choice-letter {
  text-decoration: line-through;
  text-decoration-color: var(--danger);
  text-decoration-thickness: 2px;
  color: var(--muted);
}
.choices label.eliminated .choice-letter {
  background: #e5e5ea;
  color: var(--muted);
}
.choices label.eliminated .strike-btn {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
  opacity: 1;
}
.choices label.eliminated .strike-btn:hover {
  background: #a12222;
}

.q-tools {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}
.flag-toggle {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.88rem; color: var(--muted);
  cursor: pointer;
}
.flag-toggle input:checked ~ span { color: var(--flag); }

/* ============ Reveal Box ============ */
.reveal-box {
  margin-top: 18px;
  padding: 18px;
  background: rgba(247, 181, 0, 0.12);
  border: 1px solid #f4d78e;
  border-radius: 8px;
  animation: fadein 0.2s;
}
@keyframes fadein { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.reveal-row {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.92rem;
}
.reveal-row.reveal-breakdown { flex-direction: column; gap: 6px; }
.reveal-row .label {
  color: var(--muted);
  font-weight: 600;
  min-width: 150px;
  flex-shrink: 0;
}
.reveal-row .value {
  color: var(--text);
}
.code-ref {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, "Courier New", monospace;
  font-weight: 600;
  font-size: 0.88rem;
}
pre.value {
  white-space: pre-wrap;
  font-family: inherit;
  margin: 0;
  background: var(--panel);
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  line-height: 1.5;
}

/* ============ Navigator ============ */
.nav-panel {
  background: var(--panel);
  padding: 18px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  height: fit-content;
  position: sticky;
  top: 80px;
}
.nav-hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 10px;
  font-style: italic;
}
.btn-view-all {
  width: 100%;
  margin-top: 14px;
  background: var(--accent); color: #050505;
  padding: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 6px;
}
.btn-view-all:hover { background: var(--accent-dark); }
.nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}
.nav-grid button {
  padding: 0;
  width: 100%;
  aspect-ratio: 1 / 1;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--panel);
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: 4px;
}
.nav-grid button.answered {
  background: #e9f7ed;
  border-color: var(--success);
  color: var(--success);
}
.nav-grid button.flagged {
  background: rgba(247, 181, 0, 0.18);
  border-color: var(--flag);
  color: #8a6500;
  position: relative;
}
.nav-grid button.flagged::after {
  content: "🚩";
  position: absolute;
  top: -4px;
  right: -4px;
  font-size: 0.65rem;
}
.nav-grid button.current {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.nav-legend {
  font-size: 0.78rem;
  color: var(--muted);
  display: grid;
  gap: 5px;
}
.nav-legend .dot {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: middle;
}
.nav-legend .dot.answered { background: #e9f7ed; border: 2px solid var(--success); }
.nav-legend .dot.flagged { background: rgba(247, 181, 0, 0.18); border: 2px solid var(--flag); }
.nav-legend .dot.current { background: var(--accent); border: 2px solid var(--accent); }
.nav-legend .dot.unanswered { background: var(--panel); border: 2px solid var(--border); }

/* ============ Nav Preview Popover ============ */
.nav-preview {
  position: fixed;
  width: 340px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: 0 10px 30px rgba(20,30,60,0.18);
  z-index: 50;
  font-size: 0.88rem;
  pointer-events: auto;
}
.nav-preview-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.nav-preview-head #nav-preview-title {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.9rem;
}
.nav-preview-head #nav-preview-status {
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--panel-alt);
  color: var(--muted);
  font-weight: 600;
}
.nav-preview-head #nav-preview-status.answered {
  background: #e9f7ed; color: var(--success);
}
.nav-preview-head #nav-preview-status.flagged {
  background: rgba(247, 181, 0, 0.18); color: #8a6500;
}
.nav-preview-body {
  line-height: 1.5;
  color: var(--text);
  max-height: 160px;
  overflow: auto;
  margin-bottom: 10px;
}
.nav-preview-answer {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 10px;
  padding: 6px 10px;
  background: var(--panel-alt);
  border-radius: 5px;
  display: none;
}
.nav-preview-answer.visible { display: block; }
.nav-preview-answer b { color: var(--accent); }
.nav-preview-flag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text);
  cursor: pointer;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  -webkit-user-select: none;
  user-select: none;
}
.nav-preview-flag input { cursor: pointer; }

/* ============ Footer ============ */
.exam-footer {
  background: var(--panel);
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  position: sticky;
  bottom: 0;
}
.exam-footer button { min-width: 140px; width: auto; padding: 12px 28px; }

/* ============ Results ============ */
#results-screen { padding: 40px 20px; }
#results-screen .card { max-width: 920px; }

.score-big {
  font-size: 4rem;
  font-weight: 800;
  text-align: center;
  margin: 20px 0 5px;
  color: var(--accent);
}
.score-sub {
  text-align: center;
  color: var(--muted);
  margin-bottom: 10px;
}
.pass-fail {
  text-align: center;
  margin-bottom: 30px;
  font-size: 1.2rem;
  font-weight: 700;
  padding: 10px;
  border-radius: 6px;
}
.pass-fail.pass { background: #e9f7ed; color: var(--success); }
.pass-fail.fail { background: #fbeaea; color: var(--danger); }

.results-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 30px;
}
.results-stats > div {
  background: var(--panel-alt);
  padding: 16px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--border);
}
.results-stats b { display: block; font-size: 1.5rem; color: var(--text); }
.results-stats span { font-size: 0.8rem; color: var(--muted); }

.review-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.filter-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  font-size: 0.85rem;
}
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.review-list { margin-bottom: 24px; }
.review-item {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 10px;
}
.review-item.correct { border-left: 4px solid var(--success); }
.review-item.wrong { border-left: 4px solid var(--danger); }
.review-item.skipped { border-left: 4px solid var(--muted); }
.review-q-num {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 6px;
}
.review-q-text { font-size: 0.95rem; margin-bottom: 10px; line-height: 1.5; }
.review-status { font-size: 0.85rem; margin-bottom: 4px; }
.review-status .correct-mark { color: var(--success); font-weight: 700; }
.review-status .wrong-mark { color: var(--danger); font-weight: 700; }
.review-expand {
  font-size: 0.85rem;
  color: var(--accent);
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px 0;
  font-weight: 600;
}
.review-details {
  margin-top: 10px;
  padding: 12px;
  background: var(--panel);
  border-radius: 6px;
  font-size: 0.88rem;
  border: 1px solid var(--border);
  display: none;
}
.review-details.open { display: block; }
.review-details pre {
  white-space: pre-wrap;
  font-family: inherit;
  margin: 8px 0;
  padding: 8px;
  background: var(--panel-alt);
  border-radius: 4px;
}

/* ============ Pause Overlay ============ */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(30, 34, 48, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.overlay-card {
  background: var(--panel);
  padding: 40px;
  border-radius: 12px;
  text-align: center;
  max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.overlay-card h2 { color: var(--text); font-weight: 700; font-size: 1.8rem; margin-bottom: 12px; }
.overlay-card p { color: var(--muted); margin-bottom: 24px; }

/* ============ View All Questions Overlay ============ */
.view-all-overlay {
  align-items: flex-start;
  padding: 30px 20px;
  overflow-y: auto;
}
.view-all-card {
  background: var(--panel);
  width: 100%;
  max-width: 1100px;
  max-height: 90vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.view-all-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--panel-alt);
}
.view-all-header h2 {
  margin: 0;
  color: var(--text);
  font-weight: 700;
  font-size: 1.3rem;
}
.view-all-controls {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.view-all-search {
  padding: 7px 12px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  min-width: 180px;
}
.view-all-close { padding: 7px 14px !important; font-size: 0.85rem !important; }

.view-all-list {
  padding: 16px 24px;
  overflow-y: auto;
  flex: 1;
}
.va-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
  transition: all 0.12s;
}
.va-item:hover { border-color: var(--accent); box-shadow: 0 2px 8px rgba(30,95,214,0.12); }
.va-item.answered { border-left: 4px solid var(--success); }
.va-item.flagged { background: rgba(247, 181, 0, 0.12); border-left: 4px solid var(--flag); }
.va-item.current { background: #eef5ff; border-color: var(--accent); }

.va-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  gap: 10px;
}
.va-num {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.88rem;
}
.va-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.va-badge {
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.va-badge.answered { background: #e9f7ed; color: var(--success); }
.va-badge.unanswered { background: var(--panel-alt); color: var(--muted); }
.va-badge.flagged { background: rgba(247, 181, 0, 0.18); color: #8a6500; }
.va-badge.current { background: var(--accent); color: #050505; }

.va-question {
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text);
}
.va-choices {
  list-style: none;
  padding: 0;
  margin: 0 0 10px;
  font-size: 0.85rem;
}
.va-choices li {
  padding: 4px 10px;
  color: var(--muted);
}
.va-choices li.selected {
  background: #eef5ff;
  color: var(--accent);
  border-radius: 4px;
  font-weight: 600;
}
.va-choices li .va-letter {
  display: inline-block;
  font-weight: 700;
  min-width: 20px;
}

.va-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.va-jump {
  background: var(--accent); color: #050505;
  padding: 6px 14px;
  font-size: 0.82rem;
  border-radius: 5px;
}
.va-jump:hover { background: var(--accent-dark); }
.va-flag-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--muted);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.va-empty {
  text-align: center;
  padding: 40px;
  color: var(--muted);
}

/* ============ Responsive ============ */

/* Tablet / small laptop */
@media (max-width: 900px) {
  .exam-body {
    grid-template-columns: 1fr;
    padding: 14px;
    gap: 14px;
  }
  .nav-panel { position: static; top: auto; }
  .nav-grid { grid-template-columns: repeat(8, 1fr); }
  .info-row, .results-stats { grid-template-columns: repeat(2, 1fr); }
  .exam-header { flex-wrap: wrap; gap: 8px; padding: 10px 14px; }
  .reveal-row { flex-direction: column; gap: 4px; }
  .reveal-row .label { min-width: 0; }
  .question-area { padding: 22px 18px; }
  .nav-preview { width: 92vw; max-width: 400px; }
}

/* Mobile landscape / large phone */
@media (max-width: 680px) {
  #start-screen { padding: 16px 10px; }
  .card { padding: 20px 16px; border-radius: 10px; }
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1rem; }

  .info-row { gap: 6px; }
  .info-box { padding: 10px 6px; }
  .info-box b { font-size: 1.1rem; }
  .info-box span { font-size: 0.68rem; }

  /* Start screen help details — tighten */
  .help { padding: 12px; }
  .help-body { font-size: 0.85rem; }

  /* Exam header — compact timers, flow to 2 rows if needed */
  .exam-header {
    padding: 8px 10px;
    gap: 6px;
  }
  .timer { font-size: 1.15rem; min-width: 78px; }
  .per-q-timer { padding: 3px 7px; gap: 5px; }
  .per-q-timer .pq-label { font-size: 0.65rem; }
  .per-q-timer .pq-time { font-size: 0.85rem; min-width: 34px; }
  .progress { font-size: 0.78rem; width: 100%; text-align: center; order: 3; }
  .header-actions { gap: 4px; }
  .header-actions button { padding: 6px 10px; font-size: 0.78rem; }
  /* Make sound/pause/end tight */
  #sound-btn { padding: 6px 8px !important; font-size: 0.95rem !important; }

  /* Question area */
  .question-area { padding: 16px 14px; border-radius: 8px; }
  .question-number { font-size: 0.72rem; }
  .question-text { font-size: 0.98rem; line-height: 1.5; margin-bottom: 16px; }

  /* Choices — full-width tappable, 44px min target, strike btn smaller */
  .choices label { padding: 12px 12px; gap: 10px; }
  .choice-letter { width: 24px; height: 24px; font-size: 0.82rem; }
  .choice-text { font-size: 0.95rem; }
  .strike-btn { width: 32px; height: 32px; }  /* keep finger-friendly */

  /* Q-tools: wrap nicely */
  .q-tools { gap: 8px; }
  .q-tools .btn-reveal { width: 100%; padding: 12px; font-size: 0.9rem; }
  .flag-toggle { font-size: 0.85rem; }

  /* Reveal box */
  .reveal-box { padding: 14px 12px; }
  .reveal-row { font-size: 0.88rem; }

  /* Nav panel */
  .nav-panel { padding: 14px; }
  .nav-grid { grid-template-columns: repeat(7, 1fr); gap: 5px; }
  .nav-grid button { font-size: 0.72rem; }
  .btn-view-all { padding: 12px; font-size: 0.92rem; }

  /* Nav preview becomes a bottom sheet on phones */
  .nav-preview {
    position: fixed !important;
    left: 8px !important;
    right: 8px !important;
    bottom: 8px !important;
    top: auto !important;
    width: auto !important;
    max-height: 60vh;
    overflow-y: auto;
  }

  /* Exam footer — bigger touch targets */
  .exam-footer { padding: 10px 12px; gap: 8px; }
  .exam-footer button { min-width: 0; flex: 1; padding: 14px 10px; font-size: 0.92rem; }

  /* View All modal — full screen */
  .view-all-overlay { padding: 0; }
  .view-all-card {
    max-height: 100vh;
    height: 100vh;
    border-radius: 0;
  }
  .view-all-header {
    padding: 12px 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .view-all-header h2 { font-size: 1.05rem; text-align: center; }
  .view-all-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .view-all-search { grid-column: 1 / -1; min-width: 0; width: 100%; }
  .view-all-controls .filter-btn { padding: 8px 6px; font-size: 0.78rem; }
  .view-all-close { grid-column: 1 / -1; }
  .view-all-list { padding: 10px 12px; }

  .va-item { padding: 12px; }
  .va-head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .va-question { font-size: 0.9rem; }
  .va-choices { font-size: 0.82rem; }
  .va-actions { flex-wrap: wrap; }
  .va-jump { flex: 1; padding: 10px; font-size: 0.85rem; }

  /* Results */
  #results-screen { padding: 16px 10px; }
  .score-big { font-size: 2.8rem; margin: 14px 0 4px; }
  .pass-fail { font-size: 1rem; padding: 8px; margin-bottom: 18px; }
  .results-stats { gap: 6px; margin-bottom: 22px; }
  .results-stats > div { padding: 12px 8px; }
  .results-stats b { font-size: 1.15rem; }
  .results-stats span { font-size: 0.7rem; }
  .review-filters { flex-wrap: wrap; gap: 6px; }
  .review-filters .filter-btn { flex: 1 1 auto; padding: 8px 10px; font-size: 0.8rem; }
  .review-item { padding: 12px; }
  .review-q-text { font-size: 0.9rem; }

  /* Pause overlay */
  .overlay-card { padding: 26px 20px; margin: 12px; }
  .overlay-card h2 { font-size: 1.4rem; }
}

/* Small phones */
@media (max-width: 420px) {
  .info-row { grid-template-columns: repeat(4, 1fr); }
  .info-box b { font-size: 0.95rem; }
  .info-box span { font-size: 0.58rem; }

  .nav-grid { grid-template-columns: repeat(6, 1fr); }
  .timer { font-size: 1rem; min-width: 62px; }
  .progress { font-size: 0.72rem; }
  .header-actions button { padding: 5px 8px; font-size: 0.72rem; }

  .choices label { padding: 11px 10px; gap: 8px; }
  .choice-text { font-size: 0.9rem; }

  /* If header really crowded, stack timer group above actions */
  .timer-group { flex: 1; justify-content: flex-start; }
}

/* Prevent iOS input zoom (font-size < 16px triggers zoom) */
@media (hover: none) and (pointer: coarse) {
  input[type="text"],
  input[type="number"],
  select,
  textarea { font-size: 16px !important; }
  /* Restore visual size */
  .view-all-search { font-size: 16px !important; }
}

/* Tap highlight */
button, label, input[type="radio"] { -webkit-tap-highlight-color: rgba(30,95,214,0.15); }

/* ============================================================
   AdSense side rails — show on Start screen and Results screen.
   Hidden during the exam (timed test = clean UX, AdSense-policy safe).
   Hidden under 1280px viewport (no horizontal room).
   ============================================================ */
.ad-rail-fixed {
  display: none;
  position: fixed;
  top: 88px;
  width: 300px;
  height: min(600px, calc(100vh - 110px));
  z-index: 5;
  pointer-events: auto;
}
.ad-rail-fixed.left  { left: 24px; }
.ad-rail-fixed.right { right: 24px; }

.ad-rail-fixed .ad-slot {
  width: 100%;
  height: 100%;
  border: 2px dashed #c5cad1;
  background: var(--panel-alt);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.ad-rail-fixed .ad-slot::before {
  content: "AD SLOT — ";
  font-weight: 700;
  color: var(--muted);
}

/* Show rails when start or results screen is the active screen */
body:has(#start-screen.active)   .ad-rail-fixed,
body:has(#results-screen.active) .ad-rail-fixed {
  display: block;
}

/* Hide rails on narrower viewports */
@media (max-width: 1280px) {
  body:has(#start-screen.active)   .ad-rail-fixed,
  body:has(#results-screen.active) .ad-rail-fixed {
    display: none;
  }
}

/* ============================================================
   SHARED SITE NAV / FOOTER / CONTENT PAGES
============================================================ */
.site-nav {
  background: #1e2230;
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.site-nav .brand {
  font-weight: 800;
  letter-spacing: 0.3px;
  font-size: 17px;
  color: #fff;
  text-decoration: none;
}
.site-nav .brand .accent { color: #4d8cff; }
.site-nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.site-nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.site-nav a:hover { background: rgba(255,255,255,0.1); color: #fff; }
.site-nav a.cta { background: var(--accent); color: #050505; }
.site-nav a.cta:hover { background: var(--accent-dark); }

.site-footer {
  background: #1e2230;
  color: rgba(255,255,255,0.75);
  padding: 28px 24px 22px;
  margin-top: 60px;
  font-size: 14px;
}
.site-footer .footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: rgba(255,255,255,0.85); text-decoration: none; }
.site-footer a:hover { color: #4d8cff; }
.site-footer .copyright { color: rgba(255,255,255,0.55); font-size: 13px; }
.footer-fine {
  max-width: 1100px;
  margin: 14px auto 0;
  text-align: center;
  font-size: 11px;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.2px;
}
.footer-fine a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}
.footer-fine a:hover { color: rgba(255,255,255,0.7); text-decoration: underline; }

/* Content page wrapper */
.content-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 36px 24px 48px;
}
.content-wrap h1 { color: var(--text); font-size: 32px; margin: 0 0 8px; }
.content-wrap .lede { color: var(--muted); font-size: 17px; margin: 0 0 28px; }
.content-wrap h2 {
  color: var(--accent);
  margin: 36px 0 12px;
  font-size: 22px;
  border-bottom: 2px solid #e5e8ef;
  padding-bottom: 6px;
}
.content-wrap h3 { color: var(--text); margin: 24px 0 8px; font-size: 18px; }
.content-wrap p, .content-wrap li { line-height: 1.65; color: var(--text); }
.content-wrap ul, .content-wrap ol { padding-left: 22px; }
.content-wrap code {
  background: var(--panel-alt);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--accent-dark);
}
.content-wrap .callout {
  background: rgba(184, 236, 34, 0.08);
  border-left: 4px solid var(--accent);
  padding: 14px 18px;
  margin: 18px 0;
  border-radius: 0 6px 6px 0;
}
.content-wrap .callout-warn { background: rgba(247, 181, 0, 0.10); border-left-color: #d28908; }
.content-wrap table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.content-wrap table th, .content-wrap table td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.content-wrap table th { background: var(--panel-alt); font-weight: 700; }
.content-wrap .formula {
  background: #1e2230;
  color: #e8edf6;
  padding: 14px 18px;
  border-radius: 8px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  margin: 14px 0;
  overflow-x: auto;
}
.content-wrap .cta-card {
  background: var(--accent); color: #050505;
  padding: 22px 24px;
  border-radius: 10px;
  margin: 36px 0 12px;
  text-align: center;
}
.content-wrap .cta-card a {
  display: inline-block;
  background: var(--panel);
  color: var(--accent);
  padding: 10px 22px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  margin-top: 10px;
}
.content-wrap .article-list { list-style: none; padding: 0; }
.content-wrap .article-list li {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 10px 0;
}
.content-wrap .article-list a { color: var(--accent); font-weight: 700; text-decoration: none; font-size: 17px; }
.content-wrap .article-list a:hover { text-decoration: underline; }
.content-wrap .article-list .desc { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* In-content ad slot placeholders */
.ad-incontent {
  margin: 28px 0;
  min-height: 100px;
  border: 2px dashed #c5cad1;
  background: var(--panel-alt);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  padding: 28px 12px;
  border-radius: 8px;
}
.ad-incontent::before { content: "AD SLOT — "; font-weight: 700; color: var(--muted); }

/* Contact form */
.contact-form { display: flex; flex-direction: column; gap: 14px; max-width: 540px; }
.contact-form label { font-weight: 600; color: var(--text); font-size: 14px; }
.contact-form input, .contact-form textarea {
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  font-size: 15px;
  font-family: inherit;
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form button {
  background: var(--accent); color: #050505;
  border: none;
  padding: 12px 20px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  font-size: 15px;
}
.contact-form button:hover { background: var(--accent-dark); }

/* Hide site-nav / site-footer during the exam (avoid stacking with exam-header) */
body:has(#exam-screen.active) #site-nav,
body:has(#exam-screen.active) #site-footer { display: none; }

/* ============================================================
   PSI-STYLE EXAM INTERFACE (Test Mode)
============================================================ */
.psi-header { gap: 16px; flex-wrap: wrap; }
.psi-brand { display: flex; flex-direction: column; min-width: 220px; }
.psi-exam-title { font-weight: 700; font-size: 14px; color: #fff; }
.psi-candidate { font-size: 11px; color: #9aa3b5; letter-spacing: 0.3px; }
.psi-center {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
  justify-content: center;
}
.timer-label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #9aa3b5;
  margin-bottom: 1px;
}
.timer-group { flex-direction: column; align-items: flex-start; gap: 0; }
.psi-center .progress {
  background: rgba(255,255,255,0.08);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
}

/* Test Mode: hide right-side nav-panel, center the question */
body[data-mode="test"] .exam-body {
  grid-template-columns: 1fr;
  max-width: 920px;
}
body[data-mode="test"] .nav-panel { display: none; }
body[data-mode="test"] .reveal-box { display: none !important; }
body[data-mode="test"] .btn-reveal { display: none; }
body[data-mode="test"] #nav-preview { display: none !important; }

/* Test Mode footer: 3-button row (Prev / Review / Next) */
.psi-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px 24px;
}
.psi-footer #prev-btn { justify-self: start; }
.psi-footer #review-btn { justify-self: center; }
.psi-footer #next-btn { justify-self: end; }

/* Hide Review button outside Test Mode */
body:not([data-mode="test"]) #review-btn { display: none; }

/* ============================================================
   CALCULATOR OVERLAY
============================================================ */
.calc-card {
  background: var(--panel);
  border-radius: 10px;
  padding: 0;
  width: 290px;
  max-width: 92vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  overflow: hidden;
}
.calc-head {
  background: #1e2230;
  color: #fff;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 14px;
}
.calc-close {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  padding: 0 4px;
}
.calc-close:hover { opacity: 0.7; }
.calc-display {
  background: #f3f4f8;
  padding: 18px 14px;
  text-align: right;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid #d8dde6;
  min-height: 28px;
  word-break: break-all;
}
.calc-keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #d8dde6;
}
.calc-keys button {
  background: var(--panel);
  border: none;
  padding: 16px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
}
.calc-keys button:hover { background: rgba(184, 236, 34, 0.08); }
.calc-keys button:active { background: #e0e8f5; }
.calc-keys .calc-fn { background: var(--panel-alt); color: var(--muted); }
.calc-keys .calc-op { background: var(--accent); color: #050505; }
.calc-keys .calc-op:hover { background: var(--accent-dark); }
.calc-keys .calc-eq { background: var(--accent); color: #050505; }
.calc-keys .calc-eq:hover { background: var(--accent-dark); }
.calc-keys .calc-zero { grid-column: span 2; }

/* ============================================================
   REVIEW OVERLAY (Test Mode)
============================================================ */
.review-card {
  background: var(--panel);
  border-radius: 10px;
  width: 720px;
  max-width: 94vw;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  overflow: hidden;
}
.review-head {
  background: #1e2230;
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.review-head h2 { margin: 0; font-size: 18px; color: #fff; }
.review-head .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.3); }
.review-head .btn-ghost:hover { background: rgba(255,255,255,0.1); }
.review-summary {
  display: flex;
  gap: 24px;
  padding: 16px 24px 8px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.review-summary .stat { display: flex; flex-direction: column; }
.review-summary .stat b { font-size: 22px; color: var(--accent); }
.review-summary .stat span { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
.review-legend {
  display: flex;
  gap: 18px;
  padding: 10px 24px;
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}
.review-legend .dot {
  width: 14px; height: 14px;
  border-radius: 3px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 6px;
  border: 1px solid var(--border-strong);
}
.review-legend .dot.answered { background: #b6e1c2; border-color: #6ec582; }
.review-legend .dot.flagged { background: #fff1c2; border-color: #d99a00; }
.review-legend .dot.unanswered { background: var(--panel); border-color: var(--border-strong); }
.review-help { padding: 8px 24px; margin: 0; color: var(--muted); font-size: 13px; }
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 6px;
  padding: 14px 24px;
  overflow-y: auto;
  flex: 1;
}
.review-grid button {
  padding: 10px 0;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  background: var(--panel);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  position: relative;
}
.review-grid button.answered { background: #b6e1c2; border-color: #6ec582; }
.review-grid button.flagged::after {
  content: "🚩";
  position: absolute;
  top: -3px; right: -2px;
  font-size: 10px;
}
.review-grid button:hover { border-color: var(--accent); background: rgba(184, 236, 34, 0.08); }
.review-foot {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid #e5e8ef;
  background: var(--panel-alt);
}

@media (max-width: 640px) {
  .site-nav { padding: 12px 16px; }
  .site-nav ul { width: 100%; justify-content: flex-start; }
  .content-wrap { padding: 24px 16px 36px; }
  .content-wrap h1 { font-size: 26px; }
}

/* ============================================================
   BUCKWORKS — DARK + LIME LANDING (Phase 2)
============================================================ */

/* Subtle grid texture under content */
body { background:
  radial-gradient(1100px 500px at 20% -10%, rgba(184,236,34,0.07), transparent 60%),
  radial-gradient(1100px 500px at 110% 110%, rgba(184,236,34,0.05), transparent 60%),
  var(--bg);
  background-attachment: fixed;
}

#start-screen { padding: 0; max-width: none; }
#start-screen.active { display: block; }

/* Site nav rebrand */
.site-nav { background: rgba(5,5,5,0.92); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.site-nav .brand { color: var(--text); font-size: 18px; letter-spacing: 1px; text-transform: uppercase; }
.site-nav .brand .accent { color: var(--accent); }

/* OVERHANG LOGO — big, hangs into page below the nav.
   Negative margins keep nav links at normal height while logo overflows. */
.site-nav, .site-nav ul { overflow: visible; }
.site-nav .brand-logo {
  display: inline-flex;
  align-items: center;
  padding: 0;
  position: relative;
  z-index: 5;
}
.site-nav .brand-logo img {
  height: 130px;
  width: auto;
  display: block;
  margin-top: -22px;
  margin-bottom: -58px;
  filter: drop-shadow(0 12px 26px rgba(0,0,0,.55)) drop-shadow(0 0 28px var(--accent-glow));
  transition: height 280ms cubic-bezier(.2,.7,.2,1), margin 280ms cubic-bezier(.2,.7,.2,1), filter 280ms;
}
/* Header shrinks slightly when user scrolls past 24px */
.site-nav.is-scrolled .brand-logo img {
  height: 90px;
  margin-bottom: -38px;
  filter: drop-shadow(0 8px 18px rgba(0,0,0,.55)) drop-shadow(0 0 18px var(--accent-glow));
}
@media (max-width: 960px) {
  .site-nav .brand-logo img { height: 92px; margin-top: -16px; margin-bottom: -38px; }
  .site-nav.is-scrolled .brand-logo img { height: 70px; margin-bottom: -26px; }
}
@media (max-width: 600px) {
  .site-nav .brand-logo img { height: 70px; margin-top: -12px; margin-bottom: -26px; }
  .site-nav.is-scrolled .brand-logo img { height: 56px; margin-bottom: -18px; }
}
.site-nav a { color: var(--muted); text-transform: uppercase; font-size: 12px; letter-spacing: 1px; font-weight: 700; }
.site-nav a:hover { color: var(--text); background: transparent; }
.site-nav a.cta { background: transparent; color: var(--accent); border: 1px solid var(--accent); padding: 6px 14px; }
.site-nav a.cta:hover { background: var(--accent); color: #050505; }

/* HERO — left column contained, right column (book) extends to viewport edge */
.bw-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 60px;
  max-width: none;
  margin: 0;
  padding: 96px 0 70px max(32px, calc((100vw - 1240px) / 2));
  align-items: center;
  position: relative;
  overflow: hidden;
  min-height: clamp(620px, 84vh, 880px);
}
.bw-hero::before {
  /* subtle ambient lime glow behind the book */
  content: "";
  position: absolute;
  right: -10%;
  top: 50%;
  transform: translateY(-50%);
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, var(--accent-glow), transparent 65%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}
.bw-hero-text { position: relative; z-index: 1; max-width: 620px; }
.bw-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.bw-headline {
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.96;
  font-weight: 900;
  letter-spacing: -2px;
  color: var(--text);
  text-transform: uppercase;
  margin: 0 0 22px;
  text-shadow: 0 4px 30px rgba(0,0,0,0.6);
}
.bw-headline .accent { color: var(--accent); text-shadow: 0 0 50px var(--accent-glow); }
.bw-sub { color: var(--muted); font-size: 17px; max-width: 480px; line-height: 1.55; margin: 0 0 28px; }

.bw-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.bw-btn-cta {
  background: var(--accent);
  color: #050505 !important;
  padding: 16px 32px;
  font-weight: 900;
  font-size: 14px;
  letter-spacing: 2px;
  border-radius: 4px;
  text-transform: uppercase;
  width: auto;
  border: 0;
  box-shadow: 0 0 30px var(--accent-glow);
  transition: transform 0.15s, box-shadow 0.15s;
  cursor: pointer;
}
.bw-btn-cta:hover { transform: translateY(-2px); box-shadow: 0 0 50px var(--accent-glow); }
.bw-btn-ghost {
  display: inline-flex; align-items: center;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 16px 32px;
  font-weight: 900;
  font-size: 14px;
  letter-spacing: 2px;
  border-radius: 4px;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}
.bw-btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.bw-hero-features { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 24px; }
.bw-hero-features li { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px; }
.bw-hero-features .ico { color: var(--accent); font-size: 18px; }
.bw-hero-features b { color: var(--text); font-weight: 700; }

.bw-hero-art {
  position: relative;
  align-self: stretch;       /* fill the row's height */
  display: flex;
  align-items: center;
  justify-content: flex-end;
  z-index: 1;
}
.bw-hero-logo { max-width: 100%; width: 540px; height: auto; filter: drop-shadow(0 0 60px var(--accent-glow)); }
.bw-hero-book {
  /* Image extends from inside the page out to the right viewport edge.
     Width is 100% of the column, max capped to a sensible book size. */
  width: 100%;
  height: auto;
  display: block;
  /* Accent-green border framing, but only on the visible (left + top + bottom) sides — right edge bleeds off. */
  border: 3px solid var(--accent);
  border-right: 0;
  border-radius: 14px 0 0 14px;
  box-shadow:
    0 30px 100px rgba(0,0,0,0.85),
    -10px 0 80px var(--accent-glow),
    inset 0 0 0 1px rgba(0,0,0,0.4);
  object-fit: cover;
  /* Force the image to extend to the right viewport edge regardless of column gap */
  margin-right: calc(0px - max(0px, (100vw - 1240px) / 2));
}
.bw-hero-tag {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-top: 18px;
  text-align: right;
  padding-right: max(32px, calc((100vw - 1240px) / 2));
}

/* SECTIONS */
.bw-section { max-width: 1240px; margin: 0 auto; padding: 70px 32px; }
.bw-section-head { margin-bottom: 36px; max-width: 720px; }
.bw-h2 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text);
  text-transform: uppercase;
  margin: 0 0 12px;
  line-height: 1.05;
}
.bw-h2 .accent { color: var(--accent); }
.bw-section-sub { color: var(--muted); font-size: 16px; line-height: 1.55; margin: 0; max-width: 720px; }

/* FEATURE CARDS */
.bw-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.bw-card {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 28px 22px;
  border-radius: 10px;
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
  position: relative;
}
.bw-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 0 40px var(--accent-glow); }
.bw-card-icon { font-size: 36px; margin-bottom: 18px; }
.bw-card h3 {
  font-size: 14px;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--text);
  letter-spacing: 1.5px;
  margin: 0 0 10px;
}
.bw-card p { color: var(--muted); font-size: 14px; line-height: 1.55; margin: 0 0 18px; }
.bw-card-link {
  color: var(--accent);
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 1.5px;
  text-decoration: none;
  text-transform: uppercase;
}
.bw-card-link:hover { text-decoration: underline; }

/* STATS */
.bw-stats {
  background: var(--panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 30px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}
.bw-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.bw-stat .ico { color: var(--accent); font-size: 22px; }
.bw-stat b { color: var(--text); font-size: 28px; font-weight: 900; }
.bw-stat span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 1.5px; font-weight: 700; }

/* TESTIMONIAL */
.bw-testimonial {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  max-width: 1240px;
  margin: 70px auto;
  padding: 0 32px;
  gap: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.bw-testimonial-text { padding: 50px 40px; }
.bw-quote-mark { color: var(--accent); font-size: 80px; line-height: 0.5; font-family: Georgia, serif; }
.bw-testimonial-text p { color: var(--text); font-size: 17px; line-height: 1.55; margin: 12px 0 22px; }
.bw-testimonial-author { color: var(--accent); font-weight: 900; font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; }
.bw-testimonial-author span { color: var(--muted); font-weight: 700; }
.bw-testimonial-img { height: 100%; min-height: 360px; }
.bw-testimonial-img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* CONFIGURE / EXAM CARD */
.bw-configure { padding-bottom: 30px; }
.bw-config-card {
  max-width: 720px;
  background: var(--panel);
  border: 1px solid var(--border);
}
.bw-start {
  font-size: 14px !important;
  letter-spacing: 2px !important;
  font-weight: 900 !important;
  padding: 18px !important;
  text-transform: uppercase;
  border-radius: 4px !important;
  box-shadow: 0 0 30px var(--accent-glow);
}

/* BIG CTA */
.bw-cta-bottom {
  max-width: 1240px;
  margin: 30px auto 70px;
  padding: 36px 32px;
  background: linear-gradient(90deg, rgba(184,236,34,0.10), rgba(184,236,34,0.02));
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
}
.bw-cta-icon { font-size: 48px; }
.bw-cta-copy h2 { font-size: clamp(20px, 2.4vw, 28px); font-weight: 900; text-transform: uppercase; color: var(--text); margin: 0 0 4px; line-height: 1.1; letter-spacing: -0.5px; }
.bw-cta-copy h2 .accent { color: var(--accent); }
.bw-cta-copy p { color: var(--muted); font-size: 14px; margin: 0; }

/* MOBILE BREAKPOINTS */
@media (max-width: 960px) {
  .bw-hero { grid-template-columns: 1fr; padding: 30px 0 30px; gap: 32px; min-height: 0; }
  .bw-hero-text { padding: 0 20px; max-width: none; }
  .bw-hero-art { order: -1; justify-content: center; }
  .bw-hero-logo { width: 320px; }
  .bw-hero-book {
    margin-right: 0;
    border-radius: 0;
    border: 3px solid var(--accent);
    border-left: 0;
    border-right: 0;
    width: 100%;
  }
  .bw-hero-tag { text-align: center; padding-right: 0; }
  .bw-hero-features { grid-template-columns: 1fr; }
  .bw-cards { grid-template-columns: repeat(2, 1fr); }
  .bw-stats { grid-template-columns: repeat(2, 1fr); padding: 24px 16px; }
  .bw-stat b { font-size: 22px; }
  .bw-testimonial { grid-template-columns: 1fr; }
  .bw-testimonial-img { min-height: 240px; order: -1; }
  .bw-cta-bottom { grid-template-columns: 1fr; text-align: center; }
}
@media (max-width: 600px) {
  .bw-cards { grid-template-columns: 1fr; }
  .bw-stats { grid-template-columns: 1fr; }
  .bw-hero-cta { flex-direction: column; }
  .bw-btn-cta, .bw-btn-ghost { width: 100%; text-align: center; justify-content: center; }
}