/* ================================================================
   style.css — Quiz-Instant-Feedback Edition
   ================================================================ */

:root {
  --bg-primary: #0f1520;
  --bg-secondary: #161e2e;
  --bg-card: #1a2438;
  --bg-card-hover: #1f2d45;
  --bg-input: #121a28;
  --bg-elevated: #1e293b;
  --accent: #2dd4a0;
  --accent-hover: #26b88a;
  --accent-glow: rgba(45, 212, 160, 0.12);
  --accent-dim: rgba(45, 212, 160, 0.06);
  --correct: #34d399;
  --correct-bg: rgba(52, 211, 153, 0.1);
  --correct-border: rgba(52, 211, 153, 0.4);
  --wrong: #f97066;
  --wrong-bg: rgba(249, 112, 102, 0.08);
  --wrong-border: rgba(249, 112, 102, 0.35);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.08);
  --warning-border: rgba(251, 191, 36, 0.25);
  --text-primary: #e8edf5;
  --text-secondary: #94a3b8;
  --text-muted: #4b5563;
  --text-question: #f1f5f9;
  --border: #2a3548;
  --border-light: #1f2b3e;
  --cat-thai: #f87171;
  --cat-security: #2dd4bf;
  --cat-logic: #fcd34d;
  --cat-infoact: #4ade80;
  --cat-ethics: #c4b5fd;
  --cat-english: #60a5fa;
  --cat-archives: #fb7185;
  --cat-aptitude: #fb923c;
  --hl-date: #fcd34d;
  --hl-date-bg: rgba(252, 211, 77, 0.12);
  --hl-number: #60a5fa;
  --hl-number-bg: rgba(96, 165, 250, 0.12);
  --hl-article: #c4b5fd;
  --hl-article-bg: rgba(196, 181, 253, 0.12);
  --hl-warning: #f97066;
  --hl-warning-bg: rgba(249, 112, 102, 0.1);
  --hl-key: #34d399;
  --hl-key-bg: rgba(52, 211, 153, 0.1);
  --font-heading: "Prompt", sans-serif;
  --font-body: "Sarabun", sans-serif;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.45);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 18px;
}
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll {
  overflow: hidden;
}
a {
  color: var(--accent);
  text-decoration: none;
}
::selection {
  background: rgba(45, 212, 160, 0.3);
  color: var(--text-primary);
}

/* ========== Background ========== */
.bg-effects {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
}
.blob-1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -150px;
  left: -100px;
  animation: bf1 35s ease-in-out infinite;
}
.blob-2 {
  width: 400px;
  height: 400px;
  background: #fb923c;
  bottom: -100px;
  right: -50px;
  animation: bf2 40s ease-in-out infinite;
}
.blob-3 {
  width: 350px;
  height: 350px;
  background: #60a5fa;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: bf3 38s ease-in-out infinite;
}
@keyframes bf1 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(60px, 50px) scale(1.05);
  }
  66% {
    transform: translate(-30px, 80px) scale(0.97);
  }
}
@keyframes bf2 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(-50px, -60px) scale(1.03);
  }
  66% {
    transform: translate(40px, -30px) scale(0.95);
  }
}
@keyframes bf3 {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-35%, -55%) scale(1.08);
  }
}

/* ========== Page System ========== */
.page {
  display: none;
  position: relative;
  z-index: 1;
  min-height: 100vh;
}
.page.active {
  display: flex;
  flex-direction: column;
  animation: pfi 0.35s ease-out;
}
@keyframes pfi {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Toast ========== */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  padding: 14px 22px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  animation:
    ti 0.3s ease-out,
    to 0.3s ease-in 2.5s forwards;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 380px;
  backdrop-filter: blur(12px);
}
.toast.toast-success {
  border-left: 4px solid var(--correct);
}
.toast.toast-error {
  border-left: 4px solid var(--wrong);
}
.toast.toast-warning {
  border-left: 4px solid var(--warning);
}
.toast.toast-info {
  border-left: 4px solid var(--accent);
}
@keyframes ti {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
@keyframes to {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(40px);
  }
}

/* ========== HOME ========== */
.home-header {
  text-align: center;
  padding: 50px 20px 24px;
}
.header-icon {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 2px solid rgba(45, 212, 160, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.6rem;
  color: var(--accent);
  animation: ip 4s ease-in-out infinite;
}
@keyframes ip {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(45, 212, 160, 0.2);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(45, 212, 160, 0);
  }
}
.site-title {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    var(--text-primary) 30%,
    var(--accent) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.site-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
}
.home-main {
  flex: 1;
  padding: 20px 20px 40px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Action Bar */
.home-action-bar {
  display: flex;
  gap: 14px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.action-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.action-btn i {
  font-size: 1.1rem;
}
.action-btn-cheat {
  border-color: rgba(251, 191, 36, 0.3);
}
.action-btn-cheat i {
  color: var(--warning);
}
.action-btn-cheat:hover {
  border-color: var(--warning);
  background: var(--warning-bg);
  transform: translateY(-2px);
}
.action-btn-progress {
  border-color: rgba(45, 212, 160, 0.3);
}
.action-btn-progress i {
  color: var(--accent);
}
.action-btn-progress:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* Category Cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
}
.category-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--card-color);
  transition: width var(--transition);
}
.category-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 20% 20%,
    var(--card-color),
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--transition);
}
.category-card:hover {
  transform: translateY(-5px);
  border-color: var(--card-color);
  box-shadow: var(--shadow-md);
}
.category-card:hover::before {
  width: 6px;
}
.category-card:hover::after {
  opacity: 0.05;
}
.card-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: color-mix(in srgb, var(--card-color) 12%, transparent);
  color: var(--card-color);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}
.category-card:hover .card-icon {
  transform: scale(1.08);
}
.card-title {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}
.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}
.card-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
  position: relative;
  z-index: 1;
}
.home-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ========== Exam Header ========== */
.exam-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 24px;
  background: rgba(15, 21, 32, 0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}
.btn-back {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-back:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent);
}
.exam-title-area {
  flex: 1;
  min-width: 0;
}
.exam-category-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.exam-subcategory-name {
  font-size: 0.85rem;
  color: var(--accent);
  display: none;
}
.exam-subcategory-name.visible {
  display: inline;
}

/* ========== English Filter ========== */
.english-filter {
  max-width: 700px;
  margin: 40px auto 20px;
  padding: 0 24px;
  text-align: center;
}
.filter-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 24px;
}
.filter-title i {
  color: var(--accent);
  margin-right: 8px;
}
.filter-options {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.filter-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition);
  min-width: 180px;
}
.filter-btn i {
  font-size: 2rem;
  color: var(--cat-english);
  transition: var(--transition);
}
.filter-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
}
.filter-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.filter-btn:hover {
  border-color: var(--cat-english);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

/* ================================================================
   COUNT SELECTOR — เลือกจำนวนข้อสอบ
   ออกแบบให้เด่นและเลือกง่าย — ปุ่มใหญ่ชัดเจน
   ================================================================ */
.count-selector {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
}

.count-selector-inner {
  text-align: center;
  max-width: 600px;
  width: 100%;
}

.count-selector-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.count-selector-title i {
  color: var(--accent);
  margin-right: 10px;
}

.count-selector-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.count-options {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.count-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 24px 36px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition);
  min-width: 130px;
}

.count-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-4px);
  box-shadow: 0 0 25px rgba(45, 212, 160, 0.12);
}

.count-btn .count-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.count-btn .count-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ================================================================
   QUIZ CONTENT — ข้อสอบทั้งหมด + เฉลยทันที
   ================================================================ */
.quiz-content {
  flex: 1;
  padding: 24px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding-bottom: 100px; /* ช่องสำหรับ sticky summary bar */
}

.quiz-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 12px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.quiz-count-label {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.quiz-count-label strong {
  color: var(--accent);
}

.btn-action-small {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--accent-dim);
  border: 1px solid rgba(45, 212, 160, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-action-small:hover {
  background: rgba(45, 212, 160, 0.12);
  border-color: var(--accent);
}

.btn-home-small {
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-color: var(--border);
}
.btn-home-small:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.quiz-questions {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.quiz-bottom-spacer {
  height: 20px;
}

/* ================================================================
   QUIZ QUESTION CARD — การ์ดข้อสอบ 1 ข้อ
   ออกแบบให้ตอบเฉลยได้ในการ์ดเดียว — ไม่ต้อง scroll ไปที่อื่น
   ================================================================ */
.quiz-q-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: var(--transition);
  /* เส้นขอบซ้าย — เปลี่ยนสีตามสถานะการตอบ */
  border-left: 4px solid var(--border);
}

/* ตอบถูก — เขียว */
.quiz-q-card.answered-correct {
  border-left-color: var(--correct);
}

/* ตอบผิด — ส้ม */
.quiz-q-card.answered-wrong {
  border-left-color: var(--wrong);
}

.quiz-q-number {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ไอคอนสถานะถูก/ผิด ที่มุมขวาบน */
.quiz-q-status {
  margin-left: auto;
  font-size: 0.9rem;
}

.quiz-q-status.icon-correct {
  color: var(--correct);
}
.quiz-q-status.icon-wrong {
  color: var(--wrong);
}

.quiz-q-text {
  font-size: 1.08rem;
  line-height: 1.95;
  color: var(--text-question);
  margin-bottom: 18px;
  white-space: pre-wrap;
  letter-spacing: 0.15px;
}

.quiz-q-text br {
  display: block;
  margin: 4px 0;
}

/* ตัวเลือก */
.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-choice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-primary);
  letter-spacing: 0.1px;
}

.quiz-choice:hover:not(.disabled) {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.quiz-choice-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: var(--transition);
}

.quiz-choice:hover:not(.disabled) .quiz-choice-label {
  border-color: var(--accent);
  color: var(--accent);
}

.quiz-choice-text {
  flex: 1;
  padding-top: 3px;
  white-space: pre-wrap;
}

/* --- ตอบถูก --- */
.quiz-choice.is-correct {
  border-color: var(--correct-border);
  border-left: 4px solid var(--correct);
  background: var(--correct-bg);
  cursor: default;
}

.quiz-choice.is-correct .quiz-choice-label {
  background: var(--correct);
  border-color: var(--correct);
  color: var(--bg-primary);
}

/* --- ตอบผิด --- */
.quiz-choice.is-wrong {
  border-color: var(--wrong-border);
  border-left: 4px solid var(--wrong);
  background: var(--wrong-bg);
  opacity: 0.5;
  cursor: default;
}

.quiz-choice.is-wrong .quiz-choice-label {
  background: var(--wrong);
  border-color: var(--wrong);
  color: #fff;
}

/* --- ตัวเลือกอื่นที่ไม่ได้เลือก (หลังตอบแล้ว) --- */
.quiz-choice.is-dimmed {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}

/* --- คำอธิบายเฉลย --- */
.quiz-explanation {
  margin-top: 16px;
  padding: 16px 20px;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-sm);
  font-size: 0.98rem;
  line-height: 1.9;
  color: #fcd34d;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: explSlideIn 0.3s ease-out;
}

.quiz-explanation i {
  margin-top: 4px;
  flex-shrink: 0;
  color: var(--warning);
}

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

/* สไตล์ <span class="kt"> ที่มาจากไฟล์ JSON */
.kt {
  color: var(--correct);
  font-weight: 600;
  background: var(--correct-bg);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ================================================================
   STICKY SUMMARY BAR — สรุปผลติดด้านล่าง
   แสดงเมื่อตอบข้อแรกแล้ว อัปเดต real-time
   ================================================================ */
.quiz-summary-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 95;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(15, 21, 32, 0.92);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  animation: barSlideUp 0.3s ease-out;
}

@keyframes barSlideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* ================================================================
   PAGINATION BAR — สลับชุดข้อสอบ
   วางไว้ระหว่างข้อสอบกับ sticky summary bar
   ================================================================ */
.quiz-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 28px;
  padding: 18px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.btn-page {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-page:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.btn-page:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.btn-page-next {
  background: var(--accent-dim);
  border-color: rgba(45, 212, 160, 0.3);
  color: var(--accent);
  font-weight: 600;
}

.btn-page-next:hover:not(:disabled) {
  background: rgba(45, 212, 160, 0.12);
  border-color: var(--accent);
}

/* ข้อความชุดที่ เช่น "ชุดที่ 2 / 5 (ข้อ 11-20)" */
.batch-info {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
}

.batch-info strong {
  color: var(--accent);
}

.summary-stats {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.summary-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.summary-item strong {
  color: var(--text-primary);
  font-weight: 700;
}
.summary-correct i {
  color: var(--correct);
}
.summary-wrong i {
  color: var(--wrong);
}
.summary-remaining i {
  color: var(--text-muted);
}

.summary-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ================================================================
   CHEAT SHEET
   ================================================================ */
.cheat-body {
  flex: 1;
  padding: 24px;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}
.cheat-filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.cheat-filter-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.cheat-filter-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}
.cheat-filter-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.cheat-legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 14px 18px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}
.legend-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 20px;
}
.legend-chip i {
  font-size: 0.72rem;
}
.chip-date {
  background: var(--hl-date-bg);
  color: var(--hl-date);
}
.chip-number {
  background: var(--hl-number-bg);
  color: var(--hl-number);
}
.chip-article {
  background: var(--hl-article-bg);
  color: var(--hl-article);
}
.chip-warning {
  background: var(--hl-warning-bg);
  color: var(--hl-warning);
}
.chip-key {
  background: var(--hl-key-bg);
  color: var(--hl-key);
}
.cheat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 24px;
}
.cheat-card.hidden {
  display: none;
}
.cheat-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border-light);
  line-height: 1.6;
}
.cheat-card-body {
  font-size: 1.02rem;
  line-height: 2;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-wrap: break-word;
  letter-spacing: 0.15px;
}
.hl-date {
  color: var(--hl-date);
  background: var(--hl-date-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.hl-number {
  color: var(--hl-number);
  background: var(--hl-number-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.hl-article {
  color: var(--hl-article);
  background: var(--hl-article-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.hl-warning {
  color: var(--hl-warning);
  background: var(--hl-warning-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 700;
}
.hl-key {
  color: var(--hl-key);
  background: var(--hl-key-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}

/* ========== PROGRESS MODAL ========== */
.modal-progress-overlay {
  align-items: flex-start;
  padding-top: 40px;
  overflow-y: auto;
}
.modal-progress-box {
  max-width: 760px;
  max-height: 85vh;
  overflow-y: auto;
}
.progress-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.progress-modal-header h3 {
  text-align: left;
}
.btn-close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-close-modal:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}
.progress-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.progress-stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}
.progress-stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.progress-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.progress-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}
.progress-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.progress-table thead {
  background: var(--bg-secondary);
}
.progress-table th {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.82rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.progress-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  white-space: nowrap;
}
.progress-table tbody tr:hover {
  background: var(--bg-card-hover);
}
.score-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
}
.score-badge.good {
  background: var(--correct-bg);
  color: var(--correct);
}
.score-badge.mid {
  background: var(--warning-bg);
  color: var(--warning);
}
.score-badge.low {
  background: var(--wrong-bg);
  color: var(--wrong);
}
.progress-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.progress-empty i {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
  opacity: 0.4;
}
.progress-empty p {
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.progress-empty span {
  font-size: 0.88rem;
}

/* ========== Modals ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: moi 0.2s ease-out;
}
@keyframes moi {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 460px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  animation: mbi 0.3s ease-out;
}
@keyframes mbi {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(16px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
.modal-box h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
}
.modal-box h3 i {
  color: var(--warning);
  margin-right: 8px;
}
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-modal {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-modal-cancel {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-modal-cancel:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}
.btn-modal-home {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-modal-home:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ========== Loading ========== */
.exam-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: var(--text-secondary);
}
.loading-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .progress-summary {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  html {
    font-size: 16px;
  }
  .site-title {
    font-size: 2rem;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .exam-header {
    padding: 10px 14px;
    gap: 8px;
    flex-wrap: wrap;
  }
  .exam-category-name {
    font-size: 1rem;
  }
  .btn-back span {
    display: none;
  }
  .quiz-content {
    padding: 14px;
    padding-bottom: 90px;
  }
  .quiz-q-card {
    padding: 20px;
  }
  .quiz-q-text {
    font-size: 1rem;
  }
  .quiz-choice {
    padding: 12px 14px;
    font-size: 0.95rem;
  }
  .quiz-explanation {
    padding: 14px 16px;
    font-size: 0.92rem;
  }
  .count-btn {
    padding: 18px 28px;
    min-width: 100px;
  }
  .count-btn .count-number {
    font-size: 1.6rem;
  }
  .summary-stats {
    gap: 12px;
  }
  .summary-item {
    font-size: 0.8rem;
  }
  .summary-actions {
    gap: 6px;
  }
  .btn-action-small {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  .btn-action-small span {
    display: none;
  }
  .cheat-body {
    padding: 14px;
  }
  .cheat-card {
    padding: 22px;
  }
  .cheat-card-body {
    font-size: 0.95rem;
  }
  .cheat-filter-bar {
    gap: 6px;
  }
  .cheat-filter-btn {
    padding: 8px 12px;
    font-size: 0.82rem;
  }
  .filter-options {
    flex-direction: column;
    align-items: center;
  }
  .filter-btn {
    min-width: 240px;
  }
  .modal-box {
    padding: 24px 18px;
  }
  .score-details,
  .modal-actions {
    flex-direction: column;
  }
  .btn-modal {
    justify-content: center;
  }
  .progress-table {
    font-size: 0.8rem;
  }
  .progress-table th,
  .progress-table td {
    padding: 8px 10px;
  }
  .home-action-bar {
    flex-direction: column;
  }
  .action-btn {
    justify-content: center;
  }
  .quiz-summary-bar {
    padding: 10px 14px;
    gap: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ปุ่ม Resume */
.action-btn-resume {
    border-color: rgba(52, 211, 153, 0.3);
    background: var(--correct-bg);
}
.action-btn-resume i {
    color: var(--correct);
}
.action-btn-resume:hover {
    border-color: var(--correct);
    background: var(--correct-bg);
    transform: translateY(-2px);
}