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

:root {
  --bg-primary: #0f0a1a;
  --bg-secondary: #1a1230;
  --bg-card: rgba(30, 22, 54, 0.7);
  --bg-card-hover: rgba(40, 30, 70, 0.8);
  --bg-input: rgba(255,255,255,0.06);
  --bg-input-focus: rgba(255,255,255,0.1);
  --text-primary: #f0ecf7;
  --text-secondary: #a89cc8;
  --text-muted: #6b5f8a;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --accent-glow: rgba(124,58,237,0.3);
  --success: #34d399;
  --success-bg: rgba(52,211,153,0.15);
  --danger: #f87171;
  --danger-bg: rgba(248,113,113,0.15);
  --warning: #fbbf24;
  --border: rgba(255,255,255,0.08);
  --border-active: rgba(124,58,237,0.5);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(124,58,237,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(59,130,246,0.06) 0%, transparent 50%);
  z-index: -1;
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0% { transform: translate(0,0) rotate(0deg); }
  100% { transform: translate(-5%,3%) rotate(3deg); }
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }

/* ─── Layout ─── */
.container { max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

/* ─── Header ─── */
.app-header {
  padding: 1.5rem 2rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
}
.app-header .logo {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 1.25rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  text-decoration: none;
}
.app-header .logo-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #3b82f6);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; -webkit-text-fill-color: white;
}

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-2px);
}
.card-static { composes: card; }
.card-static:hover { transform: none; box-shadow: var(--shadow); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border: none; border-radius: var(--radius);
  font-family: inherit; font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  text-decoration: none; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #6d28d9);
  color: white; box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 25px var(--accent-glow); }
.btn-secondary {
  background: var(--bg-input); color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-input-focus); border-color: var(--border-active); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(248,113,113,0.2); }
.btn-danger:hover { background: rgba(248,113,113,0.25); }
.btn-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(52,211,153,0.2); }
.btn-success:hover { background: rgba(52,211,153,0.25); }
.btn-ghost { background: transparent; color: var(--text-secondary); padding: 0.5rem; }
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-input); }
.btn-sm { padding: 0.45rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: 10px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ─── Form Elements ─── */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block; margin-bottom: 0.4rem;
  font-size: 0.8rem; font-weight: 600;
  color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em;
}
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 0.7rem 1rem;
  background: var(--bg-input); color: var(--text-primary);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-family: inherit; font-size: 0.95rem;
  transition: all var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; background: var(--bg-input-focus);
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a89cc8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-select option { background: var(--bg-secondary); color: var(--text-primary); }

/* ─── Toggle ─── */
.toggle-wrap { display: flex; align-items: center; gap: 0.75rem; cursor: pointer; }
.toggle-track {
  width: 44px; height: 24px; border-radius: 12px;
  background: var(--bg-input); border: 1px solid var(--border);
  position: relative; transition: all var(--transition); flex-shrink: 0;
}
.toggle-track::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--text-muted); transition: all var(--transition);
}
.toggle-input { display: none; }
.toggle-input:checked + .toggle-track {
  background: var(--accent); border-color: var(--accent);
}
.toggle-input:checked + .toggle-track::after {
  transform: translateX(20px); background: white;
}
.toggle-label { font-size: 0.9rem; color: var(--text-secondary); user-select: none; }

/* ─── Survey List ─── */
.survey-grid { display: flex; flex-direction: column; gap: 1rem; }
.survey-item {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.survey-info { flex: 1; min-width: 200px; }
.survey-info h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.25rem; }
.survey-info p { font-size: 0.85rem; color: var(--text-muted); }
.survey-meta { display: flex; gap: 1rem; font-size: 0.75rem; color: var(--text-muted); margin-top: 0.4rem; }
.survey-meta span { display: flex; align-items: center; gap: 0.3rem; }
.survey-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }

/* ─── Builder ─── */
.builder-toolbar {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  padding: 1rem; margin-bottom: 1.5rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); backdrop-filter: blur(12px);
}
.toolbar-btn {
  display: flex; flex-direction: column; align-items: center; gap: 0.3rem;
  padding: 0.6rem 0.8rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-input);
  color: var(--text-secondary); cursor: pointer;
  font-size: 0.7rem; font-family: inherit;
  transition: all var(--transition); min-width: 72px;
}
.toolbar-btn:hover {
  background: var(--bg-input-focus); border-color: var(--accent);
  color: var(--text-primary); transform: translateY(-2px);
}
.toolbar-btn .icon { font-size: 1.2rem; }

.field-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.25rem;
  margin-bottom: 1rem; transition: all var(--transition);
  position: relative;
}
.field-card:hover { border-color: var(--border-active); }
.field-card.dragging { opacity: 0.5; border-color: var(--accent); }
.field-card.drag-over { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }
.field-header {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem;
  cursor: grab;
}
.field-header:active { cursor: grabbing; }
.drag-handle { color: var(--text-muted); font-size: 1.1rem; cursor: grab; }
.field-type-badge {
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  padding: 0.2rem 0.6rem; border-radius: 6px;
  background: var(--accent-glow); color: var(--accent-light);
  letter-spacing: 0.05em;
}
.field-actions { margin-left: auto; display: flex; gap: 0.25rem; }
.field-body { padding-left: 1.75rem; }

.options-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem; }
.option-row { display: flex; align-items: center; gap: 0.5rem; }
.option-row .form-input { flex: 1; }
.add-option-btn {
  background: none; border: 1px dashed var(--border);
  color: var(--text-muted); padding: 0.5rem;
  border-radius: var(--radius); cursor: pointer;
  font-size: 0.85rem; font-family: inherit;
  transition: all var(--transition); margin-top: 0.5rem;
}
.add-option-btn:hover { border-color: var(--accent); color: var(--accent-light); }

/* ─── Settings Panel ─── */
.settings-panel {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.25rem;
  margin-bottom: 1.5rem; backdrop-filter: blur(12px);
}
.settings-panel h3 {
  font-size: 0.9rem; font-weight: 600; margin-bottom: 1rem;
  color: var(--text-secondary); display: flex; align-items: center; gap: 0.5rem;
}
.settings-row { display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 0; border-bottom: 1px solid var(--border);
}
.settings-row:last-child { border-bottom: none; }
.settings-row .info { flex: 1; }
.settings-row .info h4 { font-size: 0.9rem; font-weight: 500; }
.settings-row .info p { font-size: 0.8rem; color: var(--text-muted); }

/* ─── Public Form ─── */
.form-page { max-width: 680px; margin: 0 auto; padding: 2rem 1.5rem; }
.form-banner {
  background: linear-gradient(135deg, var(--accent), #3b82f6);
  border-radius: var(--radius-xl); padding: 2rem;
  margin-bottom: 1.5rem; position: relative; overflow: hidden;
}
.form-banner::after {
  content: ''; position: absolute; top: -50%; right: -30%;
  width: 300px; height: 300px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.form-banner h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; position: relative; z-index: 1; }
.form-banner p { color: rgba(255,255,255,0.8); font-size: 0.95rem; position: relative; z-index: 1; }

.form-field-group {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  margin-bottom: 1rem; backdrop-filter: blur(12px);
  transition: border-color var(--transition);
}
.form-field-group:focus-within { border-color: var(--border-active); }
.form-field-group .field-label {
  font-size: 1rem; font-weight: 500; margin-bottom: 0.5rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.required-star { color: var(--danger); font-weight: 700; }
.field-description { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.75rem; }

.radio-group, .checkbox-group { display: flex; flex-direction: column; gap: 0.6rem; }
.radio-option, .checkbox-option {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.6rem 0.8rem; border-radius: var(--radius);
  cursor: pointer; transition: background var(--transition);
}
.radio-option:hover, .checkbox-option:hover { background: var(--bg-input); }
.radio-option input[type="radio"], .checkbox-option input[type="checkbox"] {
  accent-color: var(--accent); width: 18px; height: 18px;
}

/* ─── Location ─── */
.location-widget {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  margin-bottom: 1rem;
}
.locate-btn {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1.5rem; border: 2px dashed var(--border);
  border-radius: var(--radius); background: var(--bg-input);
  color: var(--text-secondary); cursor: pointer;
  font-family: inherit; font-size: 0.95rem; font-weight: 500;
  transition: all var(--transition); width: 100%;
}
.locate-btn:hover { border-color: var(--accent); color: var(--accent-light); background: var(--accent-glow); }
.locate-btn.locating { pointer-events: none; }
.locate-btn .spinner {
  width: 18px; height: 18px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.location-result {
  margin-top: 0.75rem; padding: 0.75rem;
  border-radius: var(--radius); font-size: 0.85rem;
}
.location-result.success { background: var(--success-bg); color: var(--success); }
.location-result.error { background: var(--danger-bg); color: var(--danger); }

/* ─── Success Screen ─── */
.success-screen {
  text-align: center; padding: 3rem 1.5rem;
  animation: fadeInUp 0.5s ease;
}
.success-icon {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--success-bg); display: flex;
  align-items: center; justify-content: center;
  margin: 0 auto 1.5rem; font-size: 2.5rem;
  animation: popIn 0.5s cubic-bezier(0.175,0.885,0.32,1.275);
}
@keyframes popIn {
  0% { transform: scale(0); } 100% { transform: scale(1); }
}
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ─── Share Modal ─── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem; animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { 0% { opacity: 0; } 100% { opacity: 1; } }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 2rem;
  max-width: 500px; width: 100%; box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}
@keyframes slideUp {
  0% { transform: translateY(20px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}
.modal h2 { font-size: 1.25rem; margin-bottom: 1rem; }
.share-link-box {
  display: flex; gap: 0.5rem; margin-bottom: 1rem;
}
.share-link-box input { flex: 1; }

/* ─── Toast ─── */
.toast-container { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 2000; display: flex; flex-direction: column; gap: 0.5rem; }
.toast {
  padding: 0.75rem 1.25rem; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 500;
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  display: flex; align-items: center; gap: 0.5rem;
  box-shadow: var(--shadow);
}
.toast-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(52,211,153,0.3); }
.toast-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(248,113,113,0.3); }
@keyframes slideIn { 0% { transform: translateX(100%); opacity: 0; } 100% { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { 100% { opacity: 0; transform: translateY(10px); } }

/* ─── Empty State ─── */
.empty-state {
  text-align: center; padding: 4rem 2rem;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 0.5rem; }

/* ─── Loading ─── */
.loading { text-align: center; padding: 3rem; color: var(--text-muted); }
.loading .spinner-lg {
  width: 40px; height: 40px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

/* ─── Section Header (in form) ─── */
.section-header {
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem; margin-bottom: 1rem;
  background: var(--bg-card); border-radius: 0 var(--radius) var(--radius) 0;
}
.section-header h2 { font-size: 1.2rem; font-weight: 600; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .container, .container-wide { padding: 1rem; }
  .app-header { padding: 1rem; }
  .builder-toolbar { gap: 0.35rem; }
  .toolbar-btn { min-width: 60px; padding: 0.5rem 0.6rem; font-size: 0.65rem; }
  .survey-item { flex-direction: column; align-items: flex-start; }
  .survey-actions { width: 100%; }
  .form-banner { padding: 1.5rem; }
  .form-banner h1 { font-size: 1.35rem; }
  .modal { padding: 1.5rem; }
}