/* ============================================================
   NTS Online Quiz Portal — style.css
   Theme: NTS Green + White + Dark Gray | Glassmorphism
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --nts-green: #1a7a3c;
  --nts-green-dark: #135e2d;
  --nts-green-light: #2ca05a;
  --nts-green-glow: rgba(26, 122, 60, 0.18);
  --nts-orange: #e07b00;
  --white: #ffffff;
  --gray-50: #f8faf9;
  --gray-100: #f0f4f2;
  --gray-200: #dde7e2;
  --gray-400: #9ab0a5;
  --gray-600: #4a6358;
  --gray-800: #1e2e28;
  --answered: #1a7a3c;
  --unanswered: #d1ddd8;
  --current: #135e2d;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.12);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   LOGIN PAGE
   ============================================================ */

#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  background: linear-gradient(135deg, #0d4a22 0%, #1a7a3c 35%, #2ca05a 65%, #1a7a3c 100%);
  position: relative;
  overflow: hidden;
}

/* Decorative background circles */
#login-page::before,
#login-page::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  pointer-events: none;
}
#login-page::before { width: 500px; height: 500px; top: -150px; right: -150px; }
#login-page::after  { width: 400px; height: 400px; bottom: -120px; left: -100px; }

/* Login card */
.login-card {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: 24px;
  padding: 48px 44px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(26,122,60,0.08);
  position: relative;
  z-index: 1;
  animation: cardFadeIn 0.5s ease both;
}

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Logo area */
.login-logo {
  text-align: center;
  margin-bottom: 28px;
}
.login-logo img {
  width: 100px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.12));
}
.login-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nts-green-dark);
  margin-top: 12px;
  line-height: 1.3;
}
.login-logo p {
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* Divider */
.login-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gray-200), transparent);
  margin: 4px 0 28px;
}

/* Form fields */
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 7px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.form-group input {
  width: 100%;
  padding: 13px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus {
  border-color: var(--nts-green);
  box-shadow: 0 0 0 3px var(--nts-green-glow);
}
.form-group input::placeholder { color: var(--gray-400); }

/* Login button */
.btn-login {
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, var(--nts-green), var(--nts-green-light));
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  box-shadow: 0 4px 18px rgba(26,122,60,0.35);
  margin-top: 8px;
}
.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(26,122,60,0.45);
  filter: brightness(1.05);
}
.btn-login:active { transform: translateY(0); }

/* Error message */
.error-msg {
  background: #fff0f0;
  border: 1px solid #ffbdbd;
  color: #c0392b;
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 0.87rem;
  font-weight: 500;
  margin-top: 14px;
  text-align: center;
  display: none;
  animation: shake 0.4s ease;
}
.error-msg.show { display: block; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%,60%  { transform: translateX(-6px); }
  40%,80%  { transform: translateX(6px); }
}

/* ============================================================
   QUIZ PAGE LAYOUT
   ============================================================ */

#quiz-page {
  display: none;
  min-height: 100vh;
  background: var(--gray-50);
}

/* ---------- Top Header ---------- */
.quiz-header {
  background: linear-gradient(135deg, var(--nts-green-dark), var(--nts-green));
  color: var(--white);
  padding: 0 32px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 3px 16px rgba(0,0,0,0.2);
  position: sticky;
  top: 0;
  z-index: 100;
}
.quiz-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}
.quiz-header-left img {
  height: 42px;
  width: auto;
  filter: brightness(0) invert(1);
}
.quiz-header-left .portal-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.quiz-header-left .portal-name span {
  display: block;
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.82;
  letter-spacing: 0.04em;
}

/* Timer */
.timer-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 40px;
  padding: 8px 20px;
  backdrop-filter: blur(4px);
}
.timer-icon { font-size: 1.2rem; }
.timer-display {
  font-size: 1.35rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  min-width: 72px;
  text-align: center;
}
.timer-display.warning { color: #ffcc00; animation: pulse 1s infinite; }
.timer-display.danger  { color: #ff4444; animation: pulse 0.5s infinite; }
@keyframes pulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.6; }
}

/* ---------- Main Body ---------- */
.quiz-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 24px;
}

/* ---------- Candidate Info Bar ---------- */
.candidate-info {
  background: var(--white);
  border-radius: var(--radius);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  flex-wrap: wrap;
  margin-bottom: 20px;
  grid-column: 1 / -1;
}
.info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.info-item .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  font-weight: 600;
}
.info-item .value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray-800);
}
.info-badge {
  margin-left: auto;
  background: var(--nts-green-glow);
  color: var(--nts-green-dark);
  border: 1px solid rgba(26,122,60,0.2);
  border-radius: 40px;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 700;
}

/* ---------- Question Card (left column) ---------- */
.question-section { grid-column: 1; }

.progress-bar-wrapper {
  background: var(--white);
  border-radius: var(--radius);
  padding: 18px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 20px;
}
.progress-labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.progress-labels .q-counter {
  font-size: 0.85rem;
  color: var(--gray-600);
  font-weight: 600;
}
.progress-labels .q-counter span {
  color: var(--nts-green);
  font-weight: 800;
}
.progress-track {
  height: 8px;
  background: var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--nts-green), var(--nts-green-light));
  border-radius: 8px;
  transition: width 0.4s ease;
}

/* Question card */
.question-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 32px 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  margin-bottom: 20px;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  animation: qFadeIn 0.28s ease both;
}
@keyframes qFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.q-number-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--nts-green-glow);
  color: var(--nts-green-dark);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.question-text {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--gray-800);
  line-height: 1.55;
}

/* Options */
.options-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--white);
}
.option-item:hover {
  border-color: var(--nts-green-light);
  background: #f0faf5;
  transform: translateX(4px);
}
.option-item.selected {
  border-color: var(--nts-green);
  background: #e6f5ec;
  box-shadow: 0 0 0 2px var(--nts-green-glow);
}
.option-letter {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gray-100);
  border: 2px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--gray-600);
  flex-shrink: 0;
  transition: all var(--transition);
}
.option-item.selected .option-letter {
  background: var(--nts-green);
  border-color: var(--nts-green);
  color: var(--white);
}
.option-text {
  font-size: 0.97rem;
  color: var(--gray-800);
  line-height: 1.4;
}

/* Navigation buttons */
.nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
}
.btn-nav {
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-600);
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn-nav:hover:not(:disabled) {
  border-color: var(--nts-green);
  color: var(--nts-green);
  background: #f0faf5;
}
.btn-nav:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-submit {
  margin-left: auto;
  padding: 13px 32px;
  background: linear-gradient(135deg, #c0392b, #e74c3c);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(192,57,43,0.35);
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(192,57,43,0.45);
}

/* ---------- Right Panel: Question Palette ---------- */
.palette-panel {
  grid-column: 2;
  align-self: start;
  position: sticky;
  top: 88px;
}

.palette-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
}
.palette-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-600);
  margin-bottom: 16px;
}
.palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.palette-btn {
  aspect-ratio: 1;
  border-radius: 8px;
  border: none;
  background: var(--unanswered);
  color: var(--gray-600);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.palette-btn:hover { transform: scale(1.1); }
.palette-btn.answered {
  background: var(--answered);
  color: var(--white);
}
.palette-btn.current {
  background: var(--current);
  color: var(--white);
  box-shadow: 0 0 0 3px rgba(26,122,60,0.3);
  transform: scale(1.12);
}

/* Legend */
.palette-legend {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--gray-600);
}
.legend-dot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  flex-shrink: 0;
}
.legend-dot.answered { background: var(--answered); }
.legend-dot.unanswered { background: var(--unanswered); }
.legend-dot.current { background: var(--current); }

/* Summary in palette */
.palette-stats {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-200);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.p-stat {
  background: var(--gray-100);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
}
.p-stat .p-num {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--nts-green-dark);
  line-height: 1;
}
.p-stat .p-label {
  font-size: 0.68rem;
  color: var(--gray-400);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 3px;
}

/* ============================================================
   RESULT PAGE
   ============================================================ */

#result-page {
  display: none;
  min-height: 100vh;
  background: linear-gradient(135deg, #0d4a22 0%, #1a7a3c 50%, #2ca05a 100%);
  padding: 40px 20px;
}

.result-container {
  max-width: 700px;
  margin: 0 auto;
}

/* Confetti header */
.result-header {
  text-align: center;
  margin-bottom: 32px;
  animation: rFadeIn 0.6s ease both;
}
@keyframes rFadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-header .congrats {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.result-header .candidate-name-result {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.85);
  margin-top: 6px;
}

/* Result card */
.result-card {
  background: rgba(255,255,255,0.97);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
  animation: rFadeIn 0.7s 0.1s ease both;
}

/* Circular progress */
.circle-progress-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}
.circle-progress {
  position: relative;
  width: 180px;
  height: 180px;
}
.circle-progress svg {
  transform: rotate(-90deg);
  width: 180px;
  height: 180px;
}
.circle-bg { fill: none; stroke: var(--gray-100); stroke-width: 14; }
.circle-fill {
  fill: none;
  stroke: var(--nts-green);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 502;
  stroke-dashoffset: 502;
  transition: stroke-dashoffset 1.8s cubic-bezier(0.4,0,0.2,1);
}
.circle-fill.fail { stroke: #e74c3c; }
.circle-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.circle-text .pct-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-800);
  line-height: 1;
}
.circle-text .pct-sym {
  font-size: 1rem;
  color: var(--gray-400);
  font-weight: 600;
}

/* Pass/Fail badge */
.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 40px;
  padding: 8px 24px;
  font-size: 1rem;
  font-weight: 800;
  margin-top: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.result-badge.pass {
  background: #e6f5ec;
  color: var(--nts-green-dark);
  border: 2px solid var(--nts-green-light);
}
.result-badge.fail {
  background: #fff0f0;
  color: #c0392b;
  border: 2px solid #e74c3c;
}

/* Stats grid */
.result-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.stat-box {
  border-radius: 14px;
  padding: 18px 12px;
  text-align: center;
  border: 1px solid transparent;
}
.stat-box.correct { background: #e6f5ec; border-color: #b7dfc6; }
.stat-box.wrong   { background: #fff0f0; border-color: #ffbdbd; }
.stat-box.skipped { background: #fffde6; border-color: #ffeaa0; }
.stat-box.total   { background: var(--gray-100); border-color: var(--gray-200); }
.stat-box .s-num {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}
.stat-box.correct .s-num { color: var(--nts-green-dark); }
.stat-box.wrong   .s-num { color: #c0392b; }
.stat-box.skipped .s-num { color: #b8860b; }
.stat-box.total   .s-num { color: var(--gray-800); }
.stat-box .s-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--gray-400);
  margin-top: 5px;
}

/* Marks row */
.marks-row {
  margin-top: 20px;
  padding: 18px;
  background: var(--gray-50);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.marks-row .m-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-600);
}
.marks-row .m-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--nts-green-dark);
}

/* Restart button */
.btn-restart {
  display: block;
  width: 100%;
  margin-top: 28px;
  padding: 16px;
  background: linear-gradient(135deg, var(--nts-green), var(--nts-green-light));
  color: var(--white);
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 18px rgba(26,122,60,0.35);
  transition: all var(--transition);
  text-align: center;
}
.btn-restart:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(26,122,60,0.45);
}

/* ============================================================
   MODAL: Submit Confirmation
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.show { display: flex; }
.modal-box {
  background: var(--white);
  border-radius: 20px;
  padding: 36px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: cardFadeIn 0.3s ease;
}
.modal-box .modal-icon { font-size: 2.5rem; margin-bottom: 12px; }
.modal-box h3 { font-size: 1.3rem; font-weight: 800; color: var(--gray-800); margin-bottom: 8px; }
.modal-box p  { font-size: 0.9rem; color: var(--gray-600); margin-bottom: 24px; line-height: 1.5; }
.modal-actions { display: flex; gap: 12px; justify-content: center; }
.btn-modal-cancel {
  padding: 12px 28px;
  border: 2px solid var(--gray-200);
  border-radius: 10px;
  background: var(--white);
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-modal-cancel:hover { border-color: var(--gray-400); }
.btn-modal-confirm {
  padding: 12px 28px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #c0392b, #e74c3c);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(192,57,43,0.3);
  transition: all var(--transition);
}
.btn-modal-confirm:hover { filter: brightness(1.08); }

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

@media (max-width: 900px) {
  .quiz-body {
    grid-template-columns: 1fr;
  }
  .palette-panel {
    grid-column: 1;
    position: static;
  }
  .candidate-info { grid-column: 1; }
  .question-section { grid-column: 1; }
}

@media (max-width: 600px) {
  .quiz-header { padding: 0 16px; height: 60px; }
  .quiz-header-left img { height: 34px; }
  .quiz-header-left .portal-name { font-size: 0.95rem; }
  .timer-display { font-size: 1.1rem; }
  .quiz-body { padding: 16px; gap: 16px; }
  .question-card { padding: 22px 18px; }
  .login-card { padding: 32px 24px; }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
  .result-card { padding: 28px 20px; }
  .nav-buttons { flex-wrap: wrap; }
  .btn-submit { margin-left: 0; width: 100%; }
}