/* =========================
   MathGreece Quiz Clean UI
========================= */

#quiz-app {
  --primary: #18c08f;
  --primary-dark: #0d8f68;
  --primary-soft: #e8fbf5;

  --text: #10231d;
  --muted: #6b7b76;

  --border: #dcebe5;
  --card: #ffffff;
  --soft: #f7fbf9;

  --red: #e54848;
  --red-soft: #fff3f3;

  --shadow: 0 10px 30px rgba(0,0,0,.06);

  width: 100%;
  background: #fff;
  color: var(--text);

  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  padding: 20px 0 80px;

  box-sizing: border-box;
}

#quiz-app *,
#quiz-app *::before,
#quiz-app *::after {
  box-sizing: inherit;
}

/* =========================
   Layout
========================= */

#quiz-app .wrap {
  width: 100%;
  max-width: 1050px;
  margin: 0 auto;
  padding: 0 18px;
}

/* =========================
   Hero
========================= */

#quiz-app .quiz-hero {
  margin-bottom: 28px;
}

#quiz-app h1 {
  margin: 0;
  font-size: 54px;
  line-height: 1.05;
  font-weight: 900;
  color: #0b2f24;
}

#quiz-app .subtitle {
  margin-top: 14px;
  max-width: 850px;

  color: var(--muted);

  font-size: 17px;
  line-height: 1.7;
}

/* =========================
   Badges
========================= */

#quiz-app .badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;

  margin-top: 18px;
}

#quiz-app .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 8px 14px;

  background: var(--primary-soft);
  color: var(--primary-dark);

  border: 1px solid #b8f0dd;
  border-radius: 999px;

  font-size: 14px;
  font-weight: 800;
}

/* =========================
   Panels
========================= */

#quiz-app .panel {
  background: var(--card);

  border: 1px solid var(--border);
  border-radius: 26px;

  padding: 26px;

  box-shadow: var(--shadow);
}

/* =========================
   Lesson Select
========================= */

#quiz-app .select-panel {
  background: var(--soft);
  margin-bottom: 32px;
}

#quiz-app .section-title {
  margin: 0 0 18px;

  font-size: 42px;
  line-height: 1.1;
  font-weight: 900;

  color: #0b2f24;
}

#quiz-app #lessonSelect {
  width: 100%;
  min-width: 0;
}

#quiz-app .selector {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 140px;
  gap: 14px;
  align-items: center;
}

#quiz-app .selector > * {
  align-self: center;
}

#quiz-app select {
  flex: 1;

  height: 64px;

  padding: 0 18px;

  background: #fff;
  color: var(--text);

  border: 2px solid #cde8df;
  border-radius: 18px;

  font-size: 17px;
  font-weight: 700;

  outline: none;
}

#quiz-app select:focus {
  border-color: var(--primary);
}

/* =========================
   Buttons
========================= */

#quiz-app button {
  border: 0;
  cursor: pointer;

  border-radius: 18px;

  font: inherit;
  font-weight: 900;

  transition: .18s ease;
}

#quiz-app #startBtn {
  height: 64px;
  min-height: 64px;
  width: 140px;

  padding: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  line-height: 1;
  white-space: nowrap;

  flex: 0 0 auto;
  align-self: center;

  background: linear-gradient(
    135deg,
    var(--primary),
    #5ce0b7
  );

  color: #04251a;

  box-shadow: 0 10px 24px rgba(24,192,143,.22);
}

#quiz-app #startBtn:hover {
  transform: translateY(-1px);
}

#quiz-app button.secondary {
  background: #eef3f1;
  color: #23312d;

  border: 1px solid #d6e3de;
}

/* =========================
   Quiz Header
========================= */

#quiz-app .quiz-head {
  display: grid;
  grid-template-columns: 1fr 250px;

  gap: 20px;

  margin-bottom: 20px;
}

#quiz-app .back-btn {
  margin-bottom: 16px;

  padding: 12px 18px;

  background: var(--primary-soft);
  color: var(--primary-dark);
}

#quiz-app .lesson-title {
  margin: 0 0 8px;

  font-size: 34px;
  line-height: 1.2;
  font-weight: 900;
}

#quiz-app .lesson-desc {
  margin: 0;

  color: var(--muted);
  line-height: 1.7;
}

/* =========================
   Progress
========================= */

#quiz-app .progress-card {
  background: var(--soft);

  border: 1px solid var(--border);
  border-radius: 20px;

  padding: 18px;
}

#quiz-app .progress-line {
  height: 10px;

  margin: 12px 0 10px;

  background: #dcebe5;

  border-radius: 999px;
  overflow: hidden;
}

#quiz-app .progress-fill {
  height: 100%;
  width: 0%;

  background:
    linear-gradient(
      90deg,
      var(--primary-dark),
      var(--primary)
    );

  transition: width .25s ease;
}

#quiz-app .small {
  color: var(--muted);
  font-size: 14px;
}

/* =========================
   Question Card
========================= */

#quiz-app .question-card {
  background: #fbfefd;

  border: 1px solid var(--border);
  border-radius: 24px;

  padding: 24px;
}

#quiz-app .qnum {
  margin-bottom: 10px;

  color: var(--primary-dark);

  font-weight: 900;
}

#quiz-app .qtext {
  margin-bottom: 20px;

  font-size: 26px;
  line-height: 1.45;
  font-weight: 900;
}

/* =========================
   Answers
========================= */

#quiz-app .answers {
  display: grid;
  grid-template-columns: repeat(2,1fr);

  gap: 14px;
}

#quiz-app .answer {
  display: flex;
  align-items: center;
  gap: 12px;

  width: 100%;
  min-height: 76px;

  padding: 16px;

  text-align: center;
  white-space: normal;

  background: #fff;
  color: var(--text);

  border: 1px solid #dbe7e2;
  border-radius: 18px;
  font-weight: 400;
}

#quiz-app .answer .letter {
  font-weight: 900;
}

#quiz-app .answer:hover:not(:disabled) {
  border-color: var(--primary);
  background: #f2fcf8;
}

#quiz-app .answer .letter {
  flex: 0 0 36px;

  width: 36px;
  height: 36px;

  display: grid;
  place-items: center;

  background: var(--primary-soft);
  color: var(--primary-dark);

  border-radius: 50%;

  font-weight: 900;
}

#quiz-app .answer.correct {
  background: var(--primary-soft);
  border-color: var(--primary);
}

#quiz-app .answer.wrong {
  background: var(--red-soft);
  border-color: var(--red);
}

/* =========================
   Feedback
========================= */

#quiz-app .feedback {
  display: none;

  margin-top: 18px;
  padding: 18px;

  border-radius: 18px;

  line-height: 1.7;
}

#quiz-app .feedback.good {
  display: block;

  background: var(--primary-soft);
  border: 1px solid #96f2d7;
}

#quiz-app .feedback.bad {
  display: block;

  background: var(--red-soft);
  border: 1px solid #ffc9c9;
}

/* =========================
   Actions
========================= */

#quiz-app .actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;

  margin-top: 20px;
}

#quiz-app #nextBtn,
#quiz-app #restartBtn,
#quiz-app #againBtn {
  min-height: 52px;
  padding: 0 22px;
}

/* =========================
   Result
========================= */

#quiz-app .result {
  display: none;

  margin-top: 22px;

  padding: 34px;

  text-align: center;

  background: #fff;

  border: 1px solid #b7f1dd;
  border-radius: 24px;

  box-shadow: var(--shadow);
}

#quiz-app .score-big {
  margin: 14px 0;

  font-size: 72px;
  line-height: 1;

  color: var(--primary-dark);

  font-weight: 1000;
}

/* =========================
   Utilities
========================= */

#quiz-app .hidden {
  display: none !important;
}

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

/* Responsive fixes for mobile */
@media (max-width: 768px) {
  #quiz-app {
    padding: 16px 0 50px;
  }

  #quiz-app .wrap {
    padding: 0 14px;
  }

  #quiz-app h1 {
    font-size: 34px;
  }

  #quiz-app .subtitle {
    font-size: 15px;
    line-height: 1.6;
  }

  #quiz-app .badge-row {
    gap: 8px;
  }

  #quiz-app .badge {
    font-size: 13px;
    padding: 7px 10px;
  }

  #quiz-app .panel {
    padding: 18px;
    border-radius: 20px;
  }

  #quiz-app .small-title {
    font-size: 26px;
  }

  #quiz-app .compact-selector {
    flex-direction: column;
    gap: 12px;
  }

  #quiz-app #lessonSelect,
  #quiz-app #startBtn {
    width: 100%;
    height: 52px;
  }

  #quiz-app .quiz-head {
    grid-template-columns: 1fr;
  }

  #quiz-app .answers {
    grid-template-columns: 1fr;
  }

  #quiz-app .actions {
    flex-direction: column-reverse;
  }

  #quiz-app .actions button {
    width: 100%;
  }

  #quiz-app .qtext {
    font-size: 20px;
  }

  #quiz-app .score-big {
    font-size: 52px;
  }
}

@media (max-width: 420px) {
  #quiz-app h1 {
    font-size: 30px;
  }

  #quiz-app .panel,
  #quiz-app .question-card,
  #quiz-app .result {
    padding: 16px;
  }

  #quiz-app .badge-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  #quiz-app .badge {
    width: 100%;
    text-align: center;
  }
}






















/* =========================
   Lesson Grid
========================= */

#quiz-app .lesson-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;

  margin-top: 20px;
}

#quiz-app .lesson-btn {
  min-height: 72px;

  padding: 14px 10px;

  background: #ffffff;
  color: var(--text);

  border: 1px solid var(--border);
  border-radius: 18px;

  font-size: 15px;
  font-weight: 800;
  text-align: center;

  cursor: pointer;

  transition: .18s ease;

  box-shadow: var(--shadow);
}

#quiz-app .lesson-btn:hover {
  transform: translateY(-2px);

  border-color: var(--primary);

  background: var(--primary-soft);
}

#quiz-app .lesson-btn.active {
  background: linear-gradient(
    135deg,
    var(--primary),
    #5ce0b7
  );

  color: #04251a;

  border-color: var(--primary);
}

/* Tablet */
@media (max-width: 900px) {
  #quiz-app .lesson-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Mobile */
@media (max-width: 600px) {
  #quiz-app .lesson-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  #quiz-app .lesson-btn {
    min-height: 64px;
    font-size: 14px;
  }
}

@media (max-width: 768px) {
  #quiz-app .selector {
    grid-template-columns: 1fr;
  }

  #quiz-app #lessonSelect,
  #quiz-app #startBtn {
    width: 100%;
  }
}