/* Common styles - Modern AI-inspired design */

:root {
  /* Primary palette - Vibrant Blue/Purple */
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #6d28d9;
  --primary-50: #f5f3ff;
  --primary-100: #ede9fe;

  /* Accent - Hot Pink/Magenta */
  --accent: #ec4899;
  --accent-light: #f472b6;
  --accent-dark: #db2777;

  /* Secondary - Cyan/Teal */
  --secondary: #06b6d4;
  --secondary-light: #22d3ee;
  --secondary-dark: #0891b2;

  /* Status colors */
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;

  /* Neutrals - Cool slate */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

  /* Radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #faf5ff 0%, #ecfeff 50%, #fdf4ff 100%);
  color: var(--gray-800);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--gray-900);
  margin: 0;
}

/* Loading spinner */
.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

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

/* Loading overlay */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 9999;
}

.loading-overlay.hidden {
  display: none;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius);
  color: white;
  font-weight: 500;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  max-width: 380px;
}

.toast.success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.toast.error {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
}

.toast.warning {
  background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
}

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.45);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-outline {
  background: white;
  border: 1.5px solid var(--gray-200);
  color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--gray-300);
  background: var(--gray-50);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--gray-100);
  color: var(--gray-800);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

/* Icon button */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  border: none;
  background: transparent;
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--gray-100);
  color: var(--gray-700);
}

.icon-btn.danger:hover {
  background: var(--danger-light);
  color: var(--danger);
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  overflow: visible;
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-800);
}

.card-body {
  padding: 24px;
}

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: capitalize;
}

.badge-draft {
  background: var(--gray-100);
  color: var(--gray-600);
}

.badge-signed {
  background: var(--success-light);
  color: #065f46;
}

.badge-pending {
  background: var(--warning-light);
  color: #92400e;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  padding: 20px;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition);
}

.modal-backdrop.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--gray-400);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--gray-100);
  color: var(--gray-600);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-100);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 24px;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.empty-state h3 {
  margin-bottom: 8px;
  font-size: 18px;
  color: var(--gray-800);
}

.empty-state p {
  margin: 0 0 24px;
  color: var(--gray-500);
  font-size: 15px;
}

/* Form inputs */
.input, .select {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  background: white;
  color: var(--gray-800);
  transition: all var(--transition-fast);
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-50);
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  cursor: pointer;
}

/* Utility */
.text-muted { color: var(--gray-500); }
.text-sm { font-size: 13px; }

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in { animation: fadeIn 0.3s ease; }
.animate-slide-up { animation: slideUp 0.4s ease; }

/* Custom tooltips - positioned via JS */
.has-tooltip {
  position: relative;
  cursor: help;
}

.has-tooltip::after {
  content: attr(data-tooltip);
  position: fixed;
  top: var(--tooltip-top, 0);
  left: var(--tooltip-left, 0);
  transform: translateX(-50%) translateY(-100%);
  padding: 8px 12px;
  background: var(--gray-900);
  color: white;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius);
  white-space: nowrap;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease;
  z-index: 10000;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
}

.has-tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Allow wrapping for long tooltips */
.has-tooltip.wrap-tooltip::after {
  white-space: normal;
  max-width: 280px;
  text-align: left;
}