/* ══════════════════════════════════════════════════════════════
   ARNIX RESEARCH FORMS — STYLESHEET
   Design: Modern SaaS Survey, Clean Glassmorphism & High Usability
   ══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@600;700;800&display=swap');

:root {
  --violet-600: #6c3ce1;
  --violet-700: #5025c4;
  --violet-lt:  #8b5cf6;
  --blue-600:   #2563eb;
  --emerald-500:#10b981;
  --amber-500:  #f59e0b;
  --rose-500:   #f43f5e;

  --grad-primary: linear-gradient(135deg, #6c3ce1 0%, #2563eb 100%);
  --grad-surface: linear-gradient(145deg, #ffffff 0%, #f8faff 100%);

  --bg-page:        #0c0f17;
  --bg-card:        rgba(20, 26, 42, 0.85);
  --bg-card-hover:  rgba(28, 36, 58, 0.95);
  --bg-input:       rgba(12, 16, 26, 0.9);
  --bg-choice:      rgba(25, 33, 52, 0.6);
  --bg-choice-active: rgba(108, 60, 225, 0.18);

  --border:         rgba(255, 255, 255, 0.08);
  --border-strong:  rgba(255, 255, 255, 0.16);
  --border-active:  #8b5cf6;

  --text-main:      #f8fafc;
  --text-muted:     #94a3b8;
  --text-faint:     #64748b;

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  22px;
  --radius-xl:  30px;
  --radius-full:9999px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 12px 36px rgba(0,0,0,0.5);
  --shadow-glow:0 8px 32px rgba(108, 60, 225, 0.35);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, sans-serif;
}

[data-theme="light"] {
  --bg-page:        #f4f6fb;
  --bg-card:        rgba(255, 255, 255, 0.92);
  --bg-card-hover:  #ffffff;
  --bg-input:       #ffffff;
  --bg-choice:      #f8fafd;
  --bg-choice-active: rgba(108, 60, 225, 0.08);

  --border:         rgba(226, 232, 240, 0.9);
  --border-strong:  rgba(203, 213, 225, 0.95);
  --border-active:  #6c3ce1;

  --text-main:      #0f172a;
  --text-muted:     #475569;
  --text-faint:     #94a3b8;

  --shadow-sm:  0 1px 3px rgba(15,23,42,0.06);
  --shadow-md:  0 10px 30px rgba(15,23,42,0.08);
  --shadow-glow:0 8px 24px rgba(108, 60, 225, 0.2);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  overflow-x: hidden;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

/* Ambient glow */
.ambient-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.ambient-glow::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -80px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 60, 225, 0.15), transparent 70%);
  filter: blur(80px);
}
.ambient-glow::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -80px;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 70%);
  filter: blur(80px);
}

/* Container */
.form-container {
  width: 100%;
  max-width: 680px;
  position: relative;
  z-index: 1;
  margin: auto;
}

/* Top bar with Brand & Theme toggle */
.form-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 900;
  box-shadow: var(--shadow-glow);
}

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s var(--ease);
}
.theme-toggle-btn:hover {
  color: var(--text-main);
  border-color: var(--border-active);
}

/* Progress Bar Container */
.progress-section {
  margin-bottom: 20px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--grad-primary);
  border-radius: var(--radius-full);
  transition: width 0.4s var(--ease);
}

/* Form Card */
.form-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s var(--ease);
}

/* Steps Animation */
.step-pane {
  display: none;
  animation: stepFadeIn 0.35s var(--ease) forwards;
}

.step-pane.active {
  display: block;
}

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

/* Typography */
.step-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--violet-lt);
  margin-bottom: 12px;
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 10px;
}

.step-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 28px;
}

/* Badges on Welcome Screen */
.welcome-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 28px;
}

.pill-feature {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-choice);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* Choice Cards (Radio & Checkbox) */
.choices-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.choice-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-choice);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  user-select: none;
}

.choice-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.choice-card.selected {
  background: var(--bg-choice-active);
  border-color: var(--border-active);
  box-shadow: 0 4px 16px rgba(108, 60, 225, 0.15);
}

.choice-radio, .choice-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s var(--ease);
}

.choice-checkbox {
  border-radius: 6px;
}

.choice-card.selected .choice-radio {
  border-color: var(--border-active);
  background: var(--violet-600);
}

.choice-card.selected .choice-radio::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ffffff;
}

.choice-card.selected .choice-checkbox {
  border-color: var(--border-active);
  background: var(--violet-600);
}

.choice-card.selected .choice-checkbox::after {
  content: '✓';
  color: #fff;
  font-size: 0.75rem;
  font-weight: 900;
}

.choice-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  flex: 1;
}

/* 1 to 5 Rating Scale */
.rating-scale-wrap {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin: 24px 0 16px;
}

.rating-btn {
  flex: 1;
  height: 54px;
  border-radius: var(--radius-md);
  background: var(--bg-choice);
  border: 1.5px solid var(--border);
  color: var(--text-main);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--ease);
}

.rating-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.rating-btn.selected {
  background: var(--grad-primary);
  border-color: transparent;
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.rating-scale-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 24px;
}

/* Solution Presentation Showcase (Step 5 - O Pulo do Gato) */
.solution-showcase-box {
  background: linear-gradient(145deg, rgba(108,60,225,0.12), rgba(37,99,235,0.08));
  border: 1.5px solid rgba(108, 60, 225, 0.3);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
}

.solution-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--violet-600);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.solution-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.solution-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
}

.solution-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.solution-feat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
}

.solution-feat-item span {
  color: var(--emerald-500);
}

/* Form Action Buttons */
.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
  flex: 1;
}

.btn-primary:hover {
  opacity: 0.94;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(108, 60, 225, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text-main);
  background: var(--bg-choice);
}

.btn-link {
  color: var(--text-faint);
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
  background: none;
  border: none;
}

/* Form Inputs */
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: all 0.2s var(--ease);
  margin-top: 8px;
}

.form-input:focus {
  border-color: var(--border-active);
  box-shadow: 0 0 0 3px rgba(108, 60, 225, 0.15);
}

/* Confirmation / Success Screen */
.success-screen {
  text-align: center;
  padding: 20px 0;
}

.success-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald-500);
  font-size: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.success-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.success-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto 28px;
}

.success-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 380px;
  margin: 0 auto;
}

/* Footer info */
.form-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* Responsive Breakpoints */
@media (max-width: 600px) {
  body { padding: 16px 12px; }
  .form-card { padding: 24px 18px; border-radius: var(--radius-lg); }
  .step-title { font-size: 1.4rem; }
  .solution-features { grid-template-columns: 1fr; }
  .rating-btn { height: 46px; font-size: 1rem; }
  .form-actions { flex-direction: column-reverse; gap: 10px; }
  .btn { width: 100%; }
}