/* ============================================================
   INTRADOS DESIGN STUDIO – Candidate Assessment Portal
   style.css – Complete UI Stylesheet
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700&family=DM+Sans:wght@300;400;500;600&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --primary:       #6C3FC5;
  --primary-dark:  #4E2E9A;
  --primary-light: #8B5CF6;
  --accent:        #C084FC;
  --accent-soft:   #EDE9FE;
  --surface:       #FFFFFF;
  --surface-2:     #F8F5FF;
  --surface-3:     #F1EBFF;
  --border:        #DDD6FE;
  --text-primary:  #1A1035;
  --text-secondary:#4B5563;
  --text-muted:    #9CA3AF;
  --success:       #059669;
  --warning:       #D97706;
  --danger:        #DC2626;
  --shadow-sm:     0 1px 3px rgba(108,63,197,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:     0 4px 16px rgba(108,63,197,0.12), 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg:     0 12px 40px rgba(108,63,197,0.18), 0 4px 16px rgba(0,0,0,0.08);
  --radius-sm:     8px;
  --radius-md:     14px;
  --radius-lg:     20px;
  --radius-xl:     28px;
  --transition:    all 0.22s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 15px;
  background: var(--surface-2);
  color: var(--text-primary);
  min-height: 100vh;
  /* Subtle geometric background */
  background-image:
    radial-gradient(ellipse 80% 60% at 70% -10%, rgba(140,92,246,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at -10% 80%, rgba(108,63,197,0.06) 0%, transparent 60%);
  -webkit-font-smoothing: antialiased;
}

/* Security: disable selection and drag */
body { user-select: none; -webkit-user-select: none; }
img  { -webkit-user-drag: none; user-drag: none; }

/* ── Typography ────────────────────────────────────────────── */
h1,h2,h3 { font-family: 'Playfair Display', serif; letter-spacing: -0.02em; }

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 84px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

/* Logo lockup — centered column of the grid */
.logo-lockup {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  grid-column: 2;
}

.reviewer-login-link {
  grid-column: 3;
  justify-self: end;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 4px;
  transition: var(--transition);
}
.reviewer-login-link:hover { color: var(--primary); }

.logo-image {
  height: 56px;
  width: auto;
  display: block;
  /* Image was authored on black; this keeps it crisp on the white header */
  -webkit-user-drag: none;
  user-drag: none;
}

/* Timer in header — pinned to the right-hand grid column */
#timer-display {
  grid-column: 3;
  justify-self: end;
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--surface-3);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-weight: 600;
  font-size: 15px;
  color: var(--primary);
  letter-spacing: 0.04em;
  transition: var(--transition);
}

#timer-display.warning {
  background: #FEF3C7;
  border-color: #FCD34D;
  color: var(--warning);
  animation: pulse-warn 1s ease infinite;
}
#timer-display.danger {
  background: #FEE2E2;
  border-color: #FCA5A5;
  color: var(--danger);
  animation: pulse-warn 0.5s ease infinite;
}

.timer-icon { font-size: 14px; }

@keyframes pulse-warn {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.65; }
}

/* ── Page Layout ───────────────────────────────────────────── */
.page-wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* ── Page Sections (JS toggles display) ───────────────────── */
#registration-section { display: block; }
#assessment-section   { display: none; }
#confirmation-section { display: none; }

/* ── Card Component ────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(221,214,254,0.6);
  overflow: hidden;
}

.card-header {
  padding: 32px 36px 28px;
  border-bottom: 1px solid var(--surface-3);
  background: linear-gradient(135deg, var(--surface) 60%, var(--surface-3) 100%);
}

.card-body { padding: 32px 36px; }

/* ── Registration Page ─────────────────────────────────────── */
.reg-intro {
  text-align: center;
  margin-bottom: 12px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 14px;
}

.reg-title {
  font-size: clamp(22px, 4vw, 28px);
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.reg-sub {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Meta pills */
.assessment-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 22px;
}

.meta-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}
.meta-pill .icon { font-size: 13px; }

/* Form */
.form-grid { display: grid; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-label .req { color: var(--danger); margin-left: 2px; }

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--surface);
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(108,63,197,0.1);
}

.form-input.error   { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(220,38,38,0.08); }
.form-input.success { border-color: var(--success); }

.field-error {
  font-size: 12px;
  color: var(--danger);
  display: none;
  align-items: center;
  gap: 4px;
}
.field-error.show { display: flex; }

/* Start button */
.btn-start {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 15px 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(108,63,197,0.3);
  margin-top: 8px;
  letter-spacing: 0.01em;
}

.btn-start:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(108,63,197,0.4);
}

.btn-start:active:not(:disabled) { transform: translateY(0); }

.btn-start:disabled {
  opacity: 1;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  background: #D1D5DB;
  color: #9CA3AF;
  pointer-events: none;
}

/* ── Assessment Page ───────────────────────────────────────── */

/* Progress bar */
.progress-wrap {
  margin-bottom: 24px;
}

.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.progress-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.progress-count {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
}

.progress-track {
  height: 6px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 100px;
  transition: width 0.4s cubic-bezier(0.4,0,0.2,1);
}

/* Section label strip */
.section-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  margin-bottom: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-light);
}

/* Question card */
.question-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(221,214,254,0.6);
  padding: 36px;
  margin-bottom: 24px;
  animation: fadeSlide 0.28s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.question-number {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.question-text {
  font-size: clamp(16px, 2.5vw, 18px);
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 28px;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
}

/* Answer options */
.options-list {
  list-style: none;
  display: grid;
  gap: 12px;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
}

.option-item {
  pointer-events: auto;
}

.option-label {
  /* Reset <button> default styles */
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: inherit;
  outline: none;
  /* Layout */
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer !important;
  pointer-events: auto !important;
  transition: var(--transition);
  background: var(--surface);
  position: relative;
  overflow: hidden;
  /* Override body user-select:none so text is readable */
  user-select: none;
  -webkit-user-select: none;
}

.option-label::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity 0.18s;
}

.option-label:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}
.option-label:hover::before { opacity: 1; }

.option-indicator {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border);
  flex-shrink: 0;
  margin-top: 1px;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.option-indicator::after {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%) scale(0);
  transition: transform 0.18s;
}

/* ── Selected state — driven by JS classList.add('selected') ──── */
.option-label.selected {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(108,63,197,0.1);
}

.option-label.selected::before { opacity: 1; }

.option-label.selected .option-indicator {
  border-color: var(--primary);
}
.option-label.selected .option-indicator::after {
  transform: translate(-50%,-50%) scale(1);
}

.option-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
  transition: color 0.18s;
}

.option-label.selected .option-text {
  color: var(--primary-dark);
  font-weight: 500;
}

/* Nav buttons */
.nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  letter-spacing: 0.01em;
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none !important;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--primary-light);
  color: var(--primary);
  background: var(--accent-soft);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 3px 10px rgba(108,63,197,0.28);
  margin-left: auto;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(108,63,197,0.36);
}

.btn-submit {
  background: linear-gradient(135deg, #059669 0%, #34D399 100%);
  color: #fff;
  box-shadow: 0 3px 10px rgba(5,150,105,0.28);
  margin-left: auto;
}

.btn-submit:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(5,150,105,0.36);
}

/* Shake animation for unanswered question */
@keyframes shake {
  0%,100% { transform: translateX(0); }
  15%      { transform: translateX(-7px); }
  30%      { transform: translateX(7px); }
  45%      { transform: translateX(-5px); }
  60%      { transform: translateX(5px); }
  75%      { transform: translateX(-3px); }
  90%      { transform: translateX(3px); }
}

.question-card.shake {
  animation: shake 0.45s cubic-bezier(0.36,0.07,0.19,0.97) both;
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12) !important;
}

/* Unanswered hint */
.unanswered-hint {
  font-size: 12.5px;
  color: var(--danger);
  text-align: center;
  margin-top: 14px;
  display: none;
  font-weight: 500;
  background: #FEE2E2;
  border: 1px solid #FCA5A5;
  border-radius: var(--radius-sm);
  padding: 8px 14px;
}
.unanswered-hint.show { display: block; }

/* ── Confirmation Page ─────────────────────────────────────── */
#confirmation-section .card { text-align: center; }

.confirm-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #059669 0%, #34D399 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 8px 24px rgba(5,150,105,0.3);
  animation: popIn 0.5s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes popIn {
  from { transform: scale(0.4); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.confirm-icon svg { width: 40px; height: 40px; fill: #fff; }

.confirm-title {
  font-size: clamp(22px, 4vw, 28px);
  color: var(--text-primary);
  margin-bottom: 12px;
}

.confirm-sub {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin: 0 auto 28px;
}

.ref-id-block {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--surface-3);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 32px;
  margin-bottom: 24px;
}

.ref-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.ref-id {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  color: var(--primary);
  letter-spacing: 0.08em;
}

.confirm-note {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.6;
  border-top: 1px solid var(--surface-3);
  padding-top: 20px;
  margin-top: 4px;
}

/* ── Modal overlay (submit confirmation) ───────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26,16,53,0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 420px;
  width: 100%;
  padding: 36px 32px;
  text-align: center;
  transform: scale(0.92);
  transition: transform 0.22s cubic-bezier(0.34,1.3,0.64,1);
}

.modal-overlay.open .modal-box { transform: scale(1); }

.modal-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.modal-title {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.modal-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 26px;
}

.modal-actions { display: flex; gap: 12px; justify-content: center; }

.btn-modal-cancel {
  padding: 11px 22px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}
.btn-modal-cancel:hover { border-color: var(--primary-light); color: var(--primary); }

.btn-modal-confirm {
  padding: 11px 22px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 3px 10px rgba(108,63,197,0.28);
  transition: var(--transition);
}
.btn-modal-confirm:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(108,63,197,0.36); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
  .page-wrapper { padding: 20px 14px 50px; }
  .card-header  { padding: 24px 20px 20px; }
  .card-body    { padding: 20px; }
  .question-card { padding: 24px 20px; }
  .header-inner { padding: 0 16px; height: 72px; }
  .logo-image { height: 42px; }
  .assessment-meta { gap: 8px; }
  .meta-pill { font-size: 11px; padding: 5px 10px; }
  .nav-buttons { flex-wrap: wrap; }
  .btn { padding: 12px 18px; font-size: 13px; }
  .btn-primary, .btn-submit { width: 100%; justify-content: center; }
  .modal-box { padding: 28px 20px; }
}