/*
 * TestKinks — Quiz Shell & Gate Visual Layer
 *
 * Gate title screens, progressive background HSL shifts,
 * question shell premium styling, thumb-zone placement,
 * glassmorphic insight popup, and precision loading states.
 *
 * Depends on: style.css tokens + css/foundations.css
 *
 * DES-CX-003 · DES-CX-004
 *
 * GUARDRAILS:
 * - No scoring or gate logic is modified here.
 * - Gate slug data attributes are set by QuizInterface.js:
 *     body.setAttribute('data-tk-gate', gate_slug)
 * - This file styles those states; it does not produce them.
 */

/* ================================================================
   GATE HSL BACKGROUND SHIFTS  (DES-CX-003)
   Each gate adds a subtle coloured hue to the body::after layer
   without altering readability. The shift is 5-8° HSL rotation,
   barely perceptible — enough for a "pattern interruption" feel.
   ================================================================ */

/* Gate colour tokens — override per gate via body[data-tk-gate] */
:root {
  --tk-gate-hue:        220;   /* default (obsidian) */
  --tk-gate-sat:        15%;
  --tk-gate-shift-bg:   hsla(var(--tk-gate-hue), var(--tk-gate-sat), 7%, 0.18);
}

/* Apply shift as a tinted overlay so base background remains intact */
body.is-quiz-active::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background: radial-gradient(
    900px circle at 50% 30%,
    var(--tk-gate-shift-bg) 0%,
    transparent 70%
  );
  transition:
    background var(--tk-duration-slow) var(--tk-ease-standard);
}

@media (prefers-reduced-motion: reduce) {
  body.is-quiz-active::after { transition: none; }
}

/* Gate-specific hue overrides */
body[data-tk-gate="power"]      { --tk-gate-hue: 0;   --tk-gate-sat: 30%; }
body[data-tk-gate="sensation"]  { --tk-gate-hue: 28;  --tk-gate-sat: 25%; }
body[data-tk-gate="devotion"]   { --tk-gate-hue: 260; --tk-gate-sat: 18%; }
body[data-tk-gate="ritual"]     { --tk-gate-hue: 180; --tk-gate-sat: 20%; }
body[data-tk-gate="trust"]      { --tk-gate-hue: 200; --tk-gate-sat: 22%; }
body[data-tk-gate="intimacy"]   { --tk-gate-hue: 320; --tk-gate-sat: 20%; }
body[data-tk-gate="expression"] { --tk-gate-hue: 45;  --tk-gate-sat: 24%; }
body[data-tk-gate="discovery"]  { --tk-gate-hue: 160; --tk-gate-sat: 18%; }
body[data-tk-gate="alignment"]  { --tk-gate-hue: 220; --tk-gate-sat: 10%; }

/* ================================================================
   QUIZ CONTAINER  (DES-CX-003)
   ================================================================ */
.quiz-container {
  max-width: var(--tk-max-w-quiz);
  margin: 0 auto;
  padding: var(--tk-space-6) var(--tk-space-5);
}

@media (max-width: 600px) {
  .quiz-container {
    padding: var(--tk-space-4) var(--tk-space-4);
  }
}

/* ================================================================
   GATE INTRO SCREEN  (DES-CX-003)
   Injected by QuizInterface.js as .tk-gate-intro before each gate.
   Falls back gracefully if JS does not inject it.
   ================================================================ */
.tk-gate-intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--tk-space-9) var(--tk-space-6);
  min-height: 320px;
  animation: tk-gate-intro-in var(--tk-duration-slow) var(--tk-ease-out) both;
}

@keyframes tk-gate-intro-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .tk-gate-intro { animation: none; }
}

.tk-gate-intro__number {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-widest);
  text-transform: uppercase;
  color: var(--electric-pink);
  margin-bottom: var(--tk-space-3);
}

.tk-gate-intro__title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-3xl);
  font-weight: var(--tk-weight-bold);
  line-height: var(--tk-leading-tight);
  letter-spacing: var(--tk-tracking-tight);
  color: var(--tk-ink-100);
  margin-bottom: var(--tk-space-4);
}

.tk-gate-intro__body {
  font-family: var(--tk-font-body);
  font-size: var(--tk-fluid-lg);
  color: var(--tk-ink-500);
  line-height: var(--tk-leading-relaxed);
  max-width: 52ch;
  margin: 0 auto var(--tk-space-7);
}

/* Begin gate CTA — reuses .tk-btn system */
.tk-gate-intro__cta {
  min-width: 200px;
}

/* ================================================================
   QUIZ HEADER SECTION
   ================================================================ */
.quiz-header {
  text-align: center;
  padding: var(--tk-space-7) var(--tk-space-5);
  margin-bottom: var(--tk-space-5);
}

.quiz-header h1 {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-3xl);
  font-weight: var(--tk-weight-bold);
  color: var(--tk-ink-100);
  letter-spacing: var(--tk-tracking-tight);
  margin-bottom: var(--tk-space-4);
}

.quiz-intro-title {
  font-family: var(--tk-font-body);
  font-size: var(--tk-fluid-lg);
  color: var(--tk-ink-300);
  line-height: var(--tk-leading-normal);
  margin-bottom: var(--tk-space-3);
}

.quiz-intro-helper {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-sm);
  color: var(--tk-mute-700);
  letter-spacing: var(--tk-tracking-wide);
}

/* ================================================================
   PROGRESS BAR SECTION
   ================================================================ */
.quiz-progress {
  padding: var(--tk-space-4) var(--tk-space-5);
  margin-bottom: var(--tk-space-5);
}

.progress-container {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-2);
}

.progress-text {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  letter-spacing: var(--tk-tracking-wider);
  text-transform: uppercase;
  color: var(--tk-mute-700);
}

.progress-bar {
  height: 3px;
  background: var(--tk-elev-2);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--electric-pink);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(var(--electric-pink-rgb), 0.5);
  transition: var(--tk-transition-progress);
}

@media (prefers-reduced-motion: reduce) {
  .progress-fill { transition: none; }
}

/* ================================================================
   WORDING PREFERENCE TRIGGER (QUIZ)
   ================================================================ */
.quiz-wording-trigger {
  position: fixed;
  top: calc(var(--tk-header-height) + var(--tk-admin-bar-offset) + var(--tk-space-4));
  right: max(var(--tk-space-4), calc((100vw - var(--tk-max-w-quiz)) / 2));
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--tk-space-3);
}

@media (max-width: 768px) {
  .quiz-wording-trigger {
    top: calc(var(--tk-header-height-mobile) + var(--tk-admin-bar-offset) + var(--tk-space-4));
  }
}

.quiz-wording-trigger__tab {
  display: inline-flex;
  align-items: center;
  gap: var(--tk-space-2);
  padding: var(--tk-space-2) var(--tk-space-5);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(12, 13, 18, 0.9);
  color: var(--tk-ink-200);
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-wider);
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: var(--tk-shadow-soft);
  transition:
    color var(--tk-duration-fast) var(--tk-ease-out),
    border-color var(--tk-duration-fast) var(--tk-ease-out),
    background var(--tk-duration-fast) var(--tk-ease-out);
}

.quiz-wording-trigger__tab:hover {
  color: var(--tk-ink-100);
  border-color: rgba(var(--muted-teal-rgb, 62, 188, 175), 0.45);
  box-shadow: var(--tk-shadow-soft), 0 0 18px rgba(var(--muted-teal-rgb, 62, 188, 175), 0.18);
}

.quiz-wording-trigger__tab:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 2px;
}

.quiz-wording-trigger.is-open .quiz-wording-trigger__tab {
  color: var(--electric-pink);
  border-color: rgba(var(--electric-pink-rgb), 0.55);
  box-shadow: var(--tk-shadow-soft), var(--tk-glow-pink);
}

.quiz-wording-trigger__panel {
  width: min(360px, 92vw);
  background: var(--tk-frosted-bg);
  -webkit-backdrop-filter: blur(var(--tk-frosted-blur));
          backdrop-filter: blur(var(--tk-frosted-blur));
  border: var(--tk-frosted-border);
  border-radius: var(--tk-radius-lg);
  padding: var(--tk-space-4);
  box-shadow: var(--tk-shadow-deep);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity var(--tk-duration-fast) var(--tk-ease-out),
    transform var(--tk-duration-fast) var(--tk-ease-out);
}

.quiz-wording-trigger.is-open .quiz-wording-trigger__panel {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.quiz-wording-trigger__panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tk-space-3);
  margin-bottom: var(--tk-space-3);
}

.quiz-wording-trigger__panel-title {
  margin: 0;
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-sm);
  letter-spacing: var(--tk-tracking-wider);
  text-transform: uppercase;
  color: var(--tk-ink-200);
}

.quiz-wording-trigger__close {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--tk-ink-300);
  border-radius: var(--tk-radius-sm);
  padding: var(--tk-space-1) var(--tk-space-3);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  cursor: pointer;
  transition:
    color var(--tk-duration-fast) var(--tk-ease-out),
    border-color var(--tk-duration-fast) var(--tk-ease-out);
}

.quiz-wording-trigger__close:hover {
  color: var(--tk-ink-100);
  border-color: rgba(255, 255, 255, 0.35);
}

.quiz-wording-trigger__close:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 2px;
}

.quiz-wording-trigger .tk-wording-toggle {
  margin: 0;
  padding: var(--tk-space-4);
  background: rgba(14, 15, 20, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--tk-radius-md);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

.quiz-wording-trigger .tk-wording-toggle__label {
  color: var(--tk-ink-300);
  letter-spacing: var(--tk-tracking-wide);
}

.quiz-wording-trigger .tk-wording-toggle__options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--tk-space-2);
}

.quiz-wording-trigger .tk-wording-toggle__options label {
  justify-content: center;
  text-transform: uppercase;
  font-size: var(--tk-font-size-xs);
  letter-spacing: var(--tk-tracking-wide);
}

.quiz-wording-trigger .tk-wording-toggle__helper {
  font-size: var(--tk-font-size-xs);
  color: var(--tk-ink-500);
}

.quiz-wording-trigger .tk-wording-toggle__status {
  margin-top: var(--tk-space-2);
  min-height: 1rem;
  display: inline-flex;
  align-items: center;
  gap: var(--tk-space-1);
  padding: 2px 10px;
  border-radius: 999px;
  font-family: var(--tk-font-mono);
  font-size: 10px;
  letter-spacing: var(--tk-tracking-wide);
  color: var(--tk-ink-300);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.quiz-wording-trigger .tk-wording-toggle__status[data-state="success"] {
  color: var(--muted-teal, hsl(175, 45%, 48%));
  border-color: rgba(var(--muted-teal-rgb, 62, 188, 175), 0.4);
  background: rgba(var(--muted-teal-rgb, 62, 188, 175), 0.12);
}

.quiz-wording-trigger .tk-wording-toggle__status[data-state="error"] {
  color: var(--electric-pink);
  border-color: rgba(var(--electric-pink-rgb), 0.4);
  background: rgba(var(--electric-pink-rgb), 0.12);
}

@media (max-width: 720px) {
  .quiz-wording-trigger {
    top: auto;
    bottom: calc(var(--tk-tab-bar-height) + var(--tk-space-5) + env(safe-area-inset-bottom, 0px));
    right: 0;
    align-items: flex-end;
    gap: var(--tk-space-2);
  }

  .quiz-wording-trigger__tab {
    padding: var(--tk-space-2) var(--tk-space-3);
    min-height: 40px;
    border-radius: 999px 0 0 999px;
    border-right: none;
    box-shadow:
      var(--tk-shadow-soft),
      -10px 0 20px rgba(0, 0, 0, 0.22);
  }

  .quiz-wording-trigger__panel {
    position: fixed;
    right: var(--tk-space-3);
    bottom: calc(var(--tk-tab-bar-height) + var(--tk-space-7) + env(safe-area-inset-bottom, 0px));
    width: min(320px, 86vw);
    max-height: min(360px, 50vh);
    overflow-y: auto;
    transform: translateY(14px);
  }

  .quiz-wording-trigger.is-open .quiz-wording-trigger__panel {
    transform: translateY(0);
  }

  .quiz-wording-trigger .tk-wording-toggle__options {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .quiz-wording-trigger__panel {
    transition: none;
  }
}

/* ================================================================
   QUESTION SHELL  (DES-CX-003)
   ================================================================ */
.quiz-form {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-5);
}

.quiz-questions-container {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-4);
}

/* Individual question card */
.question-card {
  background: var(--tk-elev-1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--tk-radius-md);
  padding: var(--tk-space-6);
  animation: tk-question-in var(--tk-duration-slow) var(--tk-ease-out) both;
}

@keyframes tk-question-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .question-card { animation: none; }
}

.question-text {
  font-family: var(--tk-font-body);
  font-size: var(--tk-fluid-lg);
  font-weight: var(--tk-weight-medium);
  color: var(--tk-ink-100);
  line-height: var(--tk-leading-snug);
  margin-bottom: var(--tk-space-5);
}

/* Option list */
.question-options {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-3);
}

/* Option label */
.option-label {
  display: flex;
  align-items: center;
  gap: var(--tk-space-3);
  padding: var(--tk-space-3) var(--tk-space-4);
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--tk-radius-sm);
  background: var(--tk-elev-0);
  cursor: pointer;
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-md);
  color: var(--tk-ink-300);
  transition:
    border-color    var(--tk-duration-fast) var(--tk-ease-out),
    background      var(--tk-duration-fast) var(--tk-ease-out),
    color           var(--tk-duration-fast) var(--tk-ease-out),
    box-shadow      var(--tk-duration-fast) var(--tk-ease-out);
  min-height: 48px; /* a11y touch target */
}

.option-label:hover {
  border-color: rgba(var(--electric-pink-rgb), 0.30);
  background: rgba(var(--electric-pink-rgb), 0.05);
  color: var(--tk-ink-100);
}

.option-label:has(input:checked),
.option-label.is-selected {
  border-color: rgba(var(--electric-pink-rgb), 0.55);
  background: rgba(var(--electric-pink-rgb), 0.10);
  color: var(--tk-ink-100);
  box-shadow: 0 0 0 3px rgba(var(--electric-pink-rgb), 0.12);
}

/* Focus ring for keyboard users */
.option-label:focus-within {
  outline: none;
  box-shadow: 0 0 0 2px var(--electric-pink);
}

/* Visually hide native radio */
.option-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* Custom radio dot */
.option-label::before {
  content: "";
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.20);
  background: transparent;
  transition:
    border-color var(--tk-duration-fast) var(--tk-ease-out),
    background   var(--tk-duration-fast) var(--tk-ease-out);
}

.option-label:has(input:checked)::before,
.option-label.is-selected::before {
  border-color: var(--electric-pink);
  background: var(--electric-pink);
  box-shadow: 0 0 6px rgba(var(--electric-pink-rgb), 0.5);
}

@media (prefers-reduced-motion: reduce) {
  .option-label,
  .option-label::before { transition: none; }
}

/* ── Quiz navigation buttons (thumb-zone) ─────────────────────── */
/* DES-CX-003: primary action sits in bottom 30% on mobile */
.quiz-navigation {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--tk-space-3);
  padding: var(--tk-space-4) 0;
}

/* ── Submit strip: premium container + grouped CTA ────────────── */
.submit-button-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tk-space-4);
  padding: var(--tk-space-5) var(--tk-space-6);
  margin-top: var(--tk-space-6);
  box-shadow: var(--tk-shadow-soft);
}

.submit-button-container .submit-note {
  margin: 0;
  max-width: 360px;
  font-size: var(--tk-font-size-xs);
  line-height: 1.5;
  color: var(--tk-ink-500);
  letter-spacing: 0.02em;
}

.submit-button-container .submit-button {
  min-width: 220px;
  white-space: nowrap;
}

.submit-button-container .submit-button:disabled {
  opacity: 1;
  color: var(--tk-ink-500);
  background: linear-gradient(
    135deg,
    rgba(var(--electric-pink-rgb), 0.18),
    rgba(var(--electric-pink-rgb), 0.06)
  );
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.submit-button-container .submit-button:disabled::after {
  opacity: 0;
}

@media (max-width: 600px) {
  .quiz-navigation {
    position: sticky;
    bottom: calc(var(--tk-tab-bar-height) + var(--tk-space-3));
    background: linear-gradient(
      to top,
      var(--tk-elev-0) 60%,
      transparent 100%
    );
    padding: var(--tk-space-5) var(--tk-space-4) var(--tk-space-4);
    margin: 0 calc(-1 * var(--tk-space-4));
    z-index: 10;
  }

  .submit-button-container {
    position: sticky;
    bottom: calc(var(--tk-tab-bar-height) + var(--tk-space-3));
    padding: var(--tk-space-5) var(--tk-space-4);
    margin: 0 calc(-1 * var(--tk-space-4));
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    z-index: 10;
  }

  .submit-button-container .submit-note {
    max-width: none;
    text-align: center;
  }

  .submit-button-container .submit-button {
    width: 100%;
  }
}

/* ================================================================
   MINI-INSIGHT POPUP  (DES-CX-004)
   Glassmorphic card with electric-pink border.
   Triggered by JS adding .is-visible; focus managed by QuizInterface.
   ================================================================ */
.tk-insight-popup {
  position: fixed;
  inset: 0;
  z-index: var(--tk-z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--tk-space-5);
  background: rgba(11, 11, 13, 0.65);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tk-duration-md) var(--tk-ease-out);
}

.tk-insight-popup.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.tk-insight-popup__card {
  position: relative;
  max-width: 480px;
  width: 100%;
  background: var(--tk-frosted-bg);
  -webkit-backdrop-filter: blur(var(--tk-frosted-blur));
          backdrop-filter: blur(var(--tk-frosted-blur));
  border: 1.5px solid rgba(var(--electric-pink-rgb), 0.40);
  border-radius: var(--tk-radius-lg);
  padding: var(--tk-space-7) var(--tk-space-7) var(--tk-space-6);
  box-shadow:
    var(--tk-shadow-deep),
    0 0 40px rgba(var(--electric-pink-rgb), 0.12);
  transform: translateY(16px) scale(0.97);
  transition:
    transform var(--tk-duration-slow) var(--tk-ease-out),
    opacity   var(--tk-duration-slow) var(--tk-ease-out);
}

.tk-insight-popup.is-visible .tk-insight-popup__card {
  transform: translateY(0) scale(1);
}

@supports not (backdrop-filter: blur(1px)) {
  .tk-insight-popup__card {
    background: var(--tk-elev-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tk-insight-popup,
  .tk-insight-popup__card { transition: none; }
  .tk-insight-popup__card { transform: none; }
}

/* Decorative pink glow line at top */
.tk-insight-popup__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--tk-space-7);
  right: var(--tk-space-7);
  height: 1.5px;
  background: linear-gradient(
    to right,
    transparent,
    var(--electric-pink) 30%,
    var(--electric-pink) 70%,
    transparent
  );
  box-shadow: var(--tk-glow-pink);
  border-radius: 0 0 1px 1px;
}

.tk-insight-popup__gate-label {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  letter-spacing: var(--tk-tracking-widest);
  text-transform: uppercase;
  color: var(--electric-pink);
  margin-bottom: var(--tk-space-3);
}

.tk-insight-popup__title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-2xl);
  font-weight: var(--tk-weight-bold);
  color: var(--tk-ink-100);
  line-height: var(--tk-leading-tight);
  letter-spacing: var(--tk-tracking-tight);
  margin-bottom: var(--tk-space-4);
}

.tk-insight-popup__body {
  font-family: var(--tk-font-body);
  font-size: var(--tk-fluid-md);
  color: var(--tk-ink-300);
  line-height: var(--tk-leading-normal);
  margin-bottom: var(--tk-space-6);
}

.tk-insight-popup__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--tk-space-3);
}

.tk-insight-popup__close {
  position: absolute;
  top: var(--tk-space-4);
  right: var(--tk-space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  border-radius: var(--tk-radius-sm);
  color: var(--tk-ink-500);
  cursor: pointer;
  font-size: 1.25rem;
  transition: color var(--tk-duration-fast);
}

.tk-insight-popup__close:hover { color: var(--tk-ink-100); }
.tk-insight-popup__close:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 2px;
}

/* ================================================================
   PRECISION LOADING STATES  (DES-CX-004)
   Terminal-style JetBrains Mono copy with blinking cursor.
   Replaces generic spinner with a branded "Laboratory" feel.
   Fallback: plain text remains readable if animation fails.
   ================================================================ */
.tk-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--tk-space-4);
  padding: var(--tk-space-9);
  text-align: center;
}

/* Terminal output area */
.tk-loader__terminal {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-sm);
  color: var(--precision-silver);
  letter-spacing: var(--tk-tracking-wide);
  line-height: 2;
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-1);
}

.tk-loader__line {
  display: block;
  opacity: 0;
  animation: tk-terminal-reveal var(--tk-duration-md) var(--tk-ease-out) forwards;
}

/* Stagger each terminal line */
.tk-loader__line:nth-child(1) { animation-delay: 0ms; }
.tk-loader__line:nth-child(2) { animation-delay: 200ms; }
.tk-loader__line:nth-child(3) { animation-delay: 400ms; }
.tk-loader__line:nth-child(4) { animation-delay: 600ms; }

@keyframes tk-terminal-reveal {
  from { opacity: 0; transform: translateX(-6px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Blinking cursor at end of active line */
.tk-loader__cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--electric-pink);
  vertical-align: middle;
  margin-left: 3px;
  animation: tk-cursor-blink 1s step-end infinite;
}

@keyframes tk-cursor-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .tk-loader__line { animation: none; opacity: 1; transform: none; }
  .tk-loader__cursor { animation: none; opacity: 1; }
}

/* Preset copy classes for the three described loading states */
/* QuizInterface.js / results JS should use these wrapper classes
   and populate .tk-loader__line spans with the relevant copy. */
.tk-loader--analyzing  .tk-loader__label { color: var(--electric-pink); }
.tk-loader--mapping    .tk-loader__label { color: var(--muted-lavender); }
.tk-loader--cohesion   .tk-loader__label { color: var(--tk-gold-400); }

.tk-loader__label {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  letter-spacing: var(--tk-tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--tk-space-2);
}

/* Fallback plain spinner (hidden when terminal lines exist) */
.tk-loader:has(.tk-loader__line) .spinner,
.tk-loader:has(.tk-loader__line) .loading-spinner {
  display: none;
}