/* E-Testing Exam Interface Styles */

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --dark: #0f0f1a;
  --darker: #0a0a12;
  --light: #e2e8f0;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #1e293b;
  --radius: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Sarabun', 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 100%);
  color: var(--text);
  line-height: 1.6;
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}

/* Allow scroll for login page */
body:has(.login-container) {
  overflow: auto;
}

.login-box {
  background: rgba(15, 15, 26, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 50px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.login-logo {
  text-align: center;
  margin-bottom: 40px;
}

.login-logo i {
  font-size: 64px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-logo h1 {
  font-size: 32px;
  margin-top: 15px;
  background: linear-gradient(135deg, var(--primary), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-logo p {
  color: var(--text-muted);
  margin-top: 5px;
}

/* Virtual Keyboard */
.virtual-keyboard {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 8px;
  margin-top: 20px;
  padding: 20px;
  background: var(--darker);
  border-radius: var(--radius);
}

.vk-key {
  padding: 15px 10px;
  background: var(--dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.vk-key:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.vk-key:active {
  transform: translateY(0);
}

.vk-key.wide {
  grid-column: span 2;
}

.vk-key.delete {
  background: rgba(239, 68, 68, 0.2);
  color: var(--danger);
}

.vk-key.delete:hover {
  background: var(--danger);
  color: white;
}

/* Form Controls */
.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  margin-bottom: 10px;
  font-weight: 500;
  color: var(--text);
  font-size: 14px;
}

.form-control {
  width: 100%;
  padding: 15px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--darker);
  color: var(--text);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 2px;
  text-align: center;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

.form-control.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  transition: all 0.2s;
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

/* Exam Page */
.exam-container {
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

/* Header */
.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: var(--darker);
  border-bottom: 1px solid var(--border);
}

.exam-title {
  font-size: 18px;
  font-weight: 600;
}

.exam-timer {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 24px;
  font-weight: 700;
  padding: 10px 25px;
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(245, 158, 11, 0.2));
  border-radius: 50px;
}

.exam-timer i {
  color: var(--warning);
}

.exam-timer.warning {
  background: linear-gradient(135deg, var(--danger), var(--warning));
  color: white;
  animation: pulse 1s infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

.exam-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

/* Main Content */
.exam-content {
  display: grid;
  grid-template-columns: 1fr 280px;
  overflow: hidden;
}

/* Question Area */
.question-area {
  padding: 40px;
  overflow-y: auto;
}

.question-number {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: var(--primary);
  border-radius: 50px;
  font-weight: 600;
  margin-bottom: 25px;
}

.question-text {
  font-size: 22px;
  line-height: 1.8;
  margin-bottom: 40px;
  padding: 30px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
}

/* Choices */
.choices {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.choice-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 25px;
  background: var(--darker);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.choice-item:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateX(5px);
}

.choice-item.selected {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.1));
}

.choice-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: var(--border);
  border-radius: 50%;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.choice-item.selected .choice-label {
  background: var(--primary);
  color: white;
}

.choice-text {
  font-size: 18px;
  flex: 1;
}

/* Navigation Panel */
.nav-panel {
  background: var(--darker);
  border-left: 1px solid var(--border);
  padding: 20px;
  overflow-y: auto;
}

.nav-panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.nav-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  border: 2px solid var(--border);
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

.nav-btn:hover {
  border-color: var(--primary);
}

.nav-btn.current {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.nav-btn.answered {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--secondary);
  color: var(--secondary);
}

.nav-legend {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.legend-box {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 2px solid var(--border);
}

.legend-box.answered {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--secondary);
}

.legend-box.current {
  background: var(--primary);
  border-color: var(--primary);
}

/* Footer */
.exam-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: var(--darker);
  border-top: 1px solid var(--border);
}

.nav-buttons {
  display: flex;
  gap: 15px;
}

.btn-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 25px;
  background: var(--dark);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-nav:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
}

.btn-submit {
  padding: 15px 40px;
  background: linear-gradient(135deg, var(--secondary), #059669);
  border: none;
  border-radius: var(--radius);
  color: white;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
}

/* Result Page */
.result-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.result-box {
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 60px;
  text-align: center;
  max-width: 500px;
}

.result-icon {
  font-size: 100px;
  margin-bottom: 30px;
}

.result-icon.pass {
  color: var(--secondary);
}

.result-icon.fail {
  color: var(--danger);
}

.result-score {
  font-size: 72px;
  font-weight: 700;
  margin-bottom: 10px;
}

.result-score.pass {
  background: linear-gradient(135deg, var(--secondary), #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.result-score.fail {
  background: linear-gradient(135deg, var(--danger), #f87171);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.result-label {
  font-size: 24px;
  margin-bottom: 30px;
}

.result-details {
  background: var(--darker);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 30px;
}

.result-detail-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.result-detail-item:last-child {
  border-bottom: none;
}

/* Alert */
.alert {
  padding: 15px 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.alert-danger {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid var(--danger);
  color: var(--danger);
}

/* Fullscreen Warning */
.fullscreen-warning {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.fullscreen-warning i {
  font-size: 80px;
  color: var(--warning);
  margin-bottom: 30px;
  animation: pulse 1.5s infinite;
}

.fullscreen-warning h2 {
  font-size: 28px;
  margin-bottom: 15px;
}

.fullscreen-warning p {
  color: var(--text-muted);
  margin-bottom: 30px;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

/* Tablet (768px - 1024px) */
@media screen and (max-width: 1024px) {

  /* Exam Page - stack layout */
  .exam-content {
    grid-template-columns: 1fr;
  }

  .nav-panel {
    display: none;
  }

  .question-area {
    padding: 25px;
  }

  .question-text {
    font-size: 18px;
    padding: 20px;
  }

  /* Virtual keyboard - 5 columns */
  .virtual-keyboard {
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 15px;
  }

  .vk-key {
    padding: 12px 8px;
    font-size: 16px;
  }
}

/* Mobile (up to 768px) */
@media screen and (max-width: 768px) {

  /* Allow scrolling on mobile */
  html,
  body {
    height: auto;
    overflow: auto;
  }

  /* Fix exam container for mobile */
  .exam-container {
    height: auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  .exam-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
  }

  .question-area {
    flex: 1;
    overflow-y: auto;
  }

  .nav-panel {
    display: none;
  }

  /* Login Page */
  .login-box {
    padding: 30px 20px;
    border-radius: 15px;
    margin: 10px;
  }

  .login-logo i {
    font-size: 48px;
  }

  .login-logo h1 {
    font-size: 24px;
  }

  .form-control {
    padding: 12px 15px;
    font-size: 16px;
  }

  /* Virtual keyboard - mobile friendly */
  .virtual-keyboard {
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
    padding: 10px;
  }

  .vk-key {
    padding: 10px 6px;
    font-size: 14px;
    border-radius: 6px;
  }

  .vk-key.wide {
    grid-column: span 1;
  }

  .btn {
    padding: 14px 20px;
    font-size: 16px;
  }

  /* Exam Header */
  .exam-header {
    padding: 10px 15px;
    flex-wrap: wrap;
    gap: 10px;
  }

  .exam-title {
    font-size: 14px;
    width: 100%;
    text-align: center;
  }

  .exam-timer {
    font-size: 18px;
    padding: 8px 15px;
  }

  .exam-progress {
    font-size: 12px;
  }

  /* Question Area */
  .question-area {
    padding: 15px;
    overflow-y: auto;
  }

  .question-number {
    padding: 6px 15px;
    font-size: 14px;
    margin-bottom: 15px;
  }

  .question-text {
    font-size: 16px;
    line-height: 1.6;
    padding: 15px;
    margin-bottom: 20px;
  }

  /* Choices */
  .choices {
    gap: 10px;
  }

  .choice-item {
    padding: 12px 15px;
    gap: 12px;
  }

  .choice-label {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .choice-text {
    font-size: 15px;
  }

  /* Footer */
  .exam-footer {
    padding: 12px 15px;
    flex-direction: column;
    gap: 10px;
    position: sticky;
    bottom: 0;
    background: var(--darker);
    z-index: 900;
  }

  .nav-buttons {
    width: 100%;
    justify-content: space-between;
  }

  .btn-nav {
    padding: 10px 15px;
    font-size: 14px;
    flex: 1;
    justify-content: center;
  }

  .btn-submit {
    width: 100%;
    padding: 14px 20px;
    font-size: 16px;
  }

  /* Add bottom padding to question area so content is not hidden behind footer */
  .question-area {
    padding-bottom: 20px;
  }

  /* Result Page */
  .result-box {
    padding: 40px 20px;
    margin: 10px;
  }

  .result-icon {
    font-size: 60px;
  }

  .result-score {
    font-size: 48px;
  }

  .result-label {
    font-size: 18px;
  }

  /* Fullscreen Warning */
  .fullscreen-warning h2 {
    font-size: 20px;
  }

  .fullscreen-warning i {
    font-size: 50px;
  }
}

/* Small Mobile (up to 480px) */
@media screen and (max-width: 480px) {
  .login-box {
    padding: 25px 15px;
  }

  .login-logo i {
    font-size: 40px;
  }

  .login-logo h1 {
    font-size: 20px;
  }

  .virtual-keyboard {
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    padding: 8px;
  }

  .vk-key {
    padding: 8px 5px;
    font-size: 12px;
  }

  .question-text {
    font-size: 14px;
    padding: 12px;
  }

  .choice-item {
    padding: 10px 12px;
  }

  .choice-label {
    width: 30px;
    height: 30px;
    font-size: 12px;
  }

  .choice-text {
    font-size: 14px;
  }
}