/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.05);

  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(
    135deg,
    #6366f1 0%,
    #8b5cf6 50%,
    #a855f7 100%
  );

  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);

  --success: #10b981;
  --error: #ef4444;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);

  --font-family:
    "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(
      ellipse at 20% 0%,
      rgba(99, 102, 241, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 100%,
      rgba(139, 92, 246, 0.1) 0%,
      transparent 50%
    );
}

/* ===== Container ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ===== Header ===== */
.header {
  text-align: center;
  margin-bottom: 48px;
  animation: fadeInDown 0.6s ease;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ===== Form Sections ===== */
.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
  animation: fadeInUp 0.6s ease backwards;
}

.form-section:nth-child(1) {
  animation-delay: 0.1s;
}
.form-section:nth-child(2) {
  animation-delay: 0.15s;
}
.form-section:nth-child(3) {
  animation-delay: 0.2s;
}
.form-section:nth-child(4) {
  animation-delay: 0.25s;
}
.form-section:nth-child(5) {
  animation-delay: 0.3s;
}
.form-section:nth-child(6) {
  animation-delay: 0.35s;
}

.form-section:hover {
  border-color: rgba(99, 102, 241, 0.2);
  background: var(--bg-card-hover);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.section-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}

.section-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== Form Groups ===== */
.form-group {
  margin-bottom: 24px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group > label {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

/* ===== Input & Textarea ===== */
input[type="text"],
textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input[type="text"]::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

/* ===== Radio & Checkbox Groups ===== */
.radio-group,
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.radio-group.vertical {
  flex-direction: column;
}

.radio-option,
.checkbox-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.radio-option:hover,
.checkbox-option:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.radio-option input,
.checkbox-option input {
  display: none;
}

.radio-option input:checked + .radio-label,
.checkbox-option input:checked + .checkbox-label {
  color: var(--accent-primary);
}

.radio-option:has(input:checked),
.checkbox-option:has(input:checked) {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.12);
}

.radio-label,
.checkbox-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.radio-option:has(input:checked)::before,
.checkbox-option:has(input:checked)::before {
  content: "✓";
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--accent-primary);
  border-radius: 50%;
  font-size: 0.7rem;
  color: white;
  margin-right: -4px;
}

/* ===== Range Slider ===== */
.range-container {
  padding: 8px 0;
}

input[type="range"] {
  width: 100%;
  height: 8px;
  appearance: none;
  background: var(--bg-secondary);
  border-radius: 4px;
  outline: none;
  margin-bottom: 12px;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--accent-gradient);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--accent-gradient);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-glow);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.range-value {
  text-align: center;
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 600;
}

/* ===== Submit Button ===== */
.form-actions {
  margin-top: 32px;
  animation: fadeInUp 0.6s ease 0.4s backwards;
}

.submit-btn {
  width: 100%;
  padding: 18px 32px;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.submit-btn:hover::before {
  left: 100%;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.submit-btn:active {
  transform: translateY(0);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.spinner {
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  max-width: 400px;
  width: 100%;
  animation: scaleIn 0.3s ease;
}

.modal-content.error {
  border-color: rgba(239, 68, 68, 0.3);
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 20px;
}

.modal-content h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.modal-content p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.modal-btn {
  padding: 14px 40px;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.modal-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .container {
    padding: 24px 16px 60px;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .logo {
    font-size: 1.75rem;
  }

  .form-section {
    padding: 20px;
  }

  .section-header h2 {
    font-size: 1.1rem;
  }

  .radio-group:not(.vertical),
  .checkbox-group {
    flex-direction: column;
  }

  .radio-option,
  .checkbox-option {
    width: 100%;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Required Field ===== */
.required {
  color: var(--error);
  font-weight: 600;
}

/* ===== View Results Button ===== */
.view-results-wrapper {
  margin-top: 24px;
  text-align: center;
}

.view-results-btn {
  padding: 14px 28px;
  background: transparent;
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.view-results-btn:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Results Section ===== */
.results-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 32px;
  backdrop-filter: blur(20px);
  animation: fadeInUp 0.4s ease;
}

.results-section .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.results-section .section-header h2 {
  margin: 0;
}

.close-results-btn {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.close-results-btn:hover {
  border-color: var(--error);
  color: var(--error);
}

.results-container {
  max-height: 600px;
  overflow-y: auto;
}

.loading-text,
.no-data,
.error-text {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.error-text {
  color: var(--error);
}

.total-responses {
  margin-bottom: 16px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.total-responses strong {
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.result-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.result-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: rgba(99, 102, 241, 0.1);
  border-bottom: 1px solid var(--border-color);
}

.result-number {
  background: var(--accent-gradient);
  color: white;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
}

.result-name {
  flex: 1;
  font-weight: 600;
  color: var(--text-primary);
}

.result-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.result-body {
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-item.full-width {
  grid-column: 1 / -1;
}

.result-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-value {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pain-level-1 {
  color: var(--success);
}
.pain-level-2 {
  color: #84cc16;
}
.pain-level-3 {
  color: #eab308;
}
.pain-level-4 {
  color: #f97316;
}
.pain-level-5 {
  color: var(--error);
}

/* Custom scrollbar for results */
.results-container::-webkit-scrollbar {
  width: 8px;
}

.results-container::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 4px;
}

.results-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.results-container::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}