/* ============================================================
   ClinicOS – Main CSS (Design System & Shared Styles)
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #4F8EF7;
  --color-primary-dark: #3a77e0;
  --color-primary-light: #e8f0fe;
  --color-secondary: #6366f1;
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;
  --color-purple: #8b5cf6;
  --color-purple-light: #ede9fe;

  /* Neutral */
  --color-bg: #f0f4ff;
  --color-surface: #ffffff;
  --color-surface-2: #f8faff;
  --color-border: #e2e8f0;
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;

  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --sidebar-bg: #1e2a3b;
  --sidebar-hover: rgba(79, 142, 247, 0.12);
  --sidebar-active: rgba(79, 142, 247, 0.18);
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;

  /* Spacing */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select {
  font-family: inherit;
  font-size: var(--font-size-base);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
input::placeholder, textarea::placeholder { color: var(--color-text-muted); }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
textarea { resize: vertical; min-height: 80px; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Global Loader ---------- */
.global-loader {
  position: fixed;
  inset: 0;
  background: var(--sidebar-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}
.global-loader.hidden {
  opacity: 0;
  visibility: hidden;
}
.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: white;
}
.loader-content p { font-size: var(--font-size-md); color: var(--sidebar-text); }
.loader-ring {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(79, 142, 247, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Toast Notifications ---------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  font-size: var(--font-size-sm);
  font-weight: 500;
  pointer-events: all;
  min-width: 280px;
  max-width: 380px;
  border-left: 4px solid;
  animation: toast-in 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  transition: opacity var(--transition-base), transform var(--transition-base);
}
.toast.toast-exit { animation: toast-out 0.3s ease forwards; }
.toast--success { border-color: var(--color-success); }
.toast--error   { border-color: var(--color-danger); }
.toast--info    { border-color: var(--color-primary); }
.toast--warning { border-color: var(--color-warning); }
.toast-icon { font-size: 16px; flex-shrink: 0; }
.toast-text { flex: 1; color: var(--color-text-primary); }
.toast-close { color: var(--color-text-muted); font-size: 16px; cursor: pointer; padding: 2px 6px; border-radius: 4px; }
.toast-close:hover { background: var(--color-bg); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(120%); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1.5px solid transparent;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 15px rgba(79, 142, 247, 0.4);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-bg); color: var(--color-text-primary); }
.btn-success {
  background: var(--color-success);
  color: white;
  border-color: var(--color-success);
}
.btn-success:hover:not(:disabled) { background: #059669; }
.btn-danger {
  background: var(--color-danger);
  color: white;
  border-color: var(--color-danger);
}
.btn-danger:hover:not(:disabled) { background: #dc2626; }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover:not(:disabled) { background: var(--color-primary-light); }
.btn-sm { padding: 6px 14px; font-size: var(--font-size-xs); }
.btn-icon {
  padding: 7px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.btn-icon:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }

.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ---------- Form Styles ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}
.form-group--full { grid-column: 1 / -1; }
.form-grid {
  display: grid;
  gap: 20px;
}
.form-grid--2 { grid-template-columns: repeat(2, 1fr); }
.form-grid--3 { grid-template-columns: repeat(3, 1fr); }
.form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  margin-top: 20px;
}
.field-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  min-height: 16px;
}
.form-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.input-wrapper input { padding-left: 40px; }
.input-icon {
  position: absolute;
  left: 12px;
  color: var(--color-text-muted);
  pointer-events: none;
}
.toggle-password {
  position: absolute;
  right: 12px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding: 4px;
}
.toggle-password:hover { color: var(--color-primary); }

/* ---------- Table Styles ---------- */
.table-wrapper {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}
.data-table thead tr {
  background: var(--color-surface-2);
  border-bottom: 2px solid var(--color-border);
}
.data-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr {
  transition: background var(--transition-fast);
}
.data-table tbody tr:hover { background: var(--color-surface-2); }
.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  padding: 40px !important;
  font-size: var(--font-size-sm);
}

/* ---------- Badge / Status Chips ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  white-space: nowrap;
}
.badge--paid   { background: var(--color-success-light); color: #065f46; }
.badge--unpaid { background: var(--color-warning-light); color: #92400e; }
.badge--blue   { background: var(--color-primary-light); color: #1e40af; }
.badge--purple { background: var(--color-purple-light); color: #5b21b6; }
.badge--red    { background: var(--color-danger-light); color: #991b1b; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadein 0.2s ease;
}
.modal-overlay.open { display: flex; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: modal-slide-in 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal--large { max-width: 720px; }
@keyframes modal-slide-in {
  from { opacity: 0; transform: translateY(-20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px 20px;
  border-bottom: 1px solid var(--color-border);
}
.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}
.modal-close {
  font-size: 22px;
  color: var(--color-text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.modal-close:hover { background: var(--color-danger-light); color: var(--color-danger); }
.modal-body { padding: 24px 28px; }
.modal-footer {
  padding: 16px 28px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ---------- Filter Bar ---------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filter-input {
  max-width: 360px;
  font-size: var(--font-size-sm);
}

/* ---------- Search Box ---------- */
.search-box-large {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.search-box-large:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.search-box-large svg { color: var(--color-text-muted); flex-shrink: 0; }
.search-box-large input {
  border: none;
  padding: 0;
  flex: 1;
  font-size: var(--font-size-md);
  background: transparent;
  box-shadow: none;
}
.search-box-large input:focus { box-shadow: none; }
.search-results { display: flex; flex-direction: column; gap: 12px; }

/* ---------- Utility ---------- */
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.fw-600 { font-weight: 600; }
.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }

/* ---------- Print Styles ---------- */
@media print {
  .sidebar, .topbar, .modal-footer, .btn, .form-actions { display: none !important; }
  .main-content { margin: 0 !important; padding: 0 !important; }
  body { background: white; }
  .modal, .modal-overlay { position: static !important; box-shadow: none !important; }
  .modal-overlay.open { background: transparent !important; backdrop-filter: none !important; }
  .modal-body { padding: 0 !important; }
}

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

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .form-grid--2, .form-grid--3 { grid-template-columns: 1fr; }
  .form-actions { flex-direction: column-reverse; }
  .form-actions .btn { width: 100%; justify-content: center; }
}