/* ============================================
   MODERN MINIMAL DESIGN SYSTEM - TW STUDIO
   ============================================ */

:root {
  /* Colors */
  --primary: #667eea;
  --primary-dark: #764ba2;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #10b981;
  --info: #3b82f6;

  /* Neutrals */
  --gray-50: #fafafa;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 48px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans Gujarati', sans-serif;
  --font-mono: 'Menlo', 'Monaco', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  color: var(--gray-900);
  line-height: 1.6;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: 32px; }
h2 { font-size: 28px; }
h3 { font-size: 24px; }
h4 { font-size: 20px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
}

small {
  font-size: 12px;
  color: var(--gray-500);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-50);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 12px 28px;
  font-size: 15px;
}

/* ============================================
   CONTAINERS & LAYOUT
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-lg {
  max-width: 1400px;
}

.container-sm {
  max-width: 800px;
}

.header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: var(--spacing-xl) var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xl);
}

.logo {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: color var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.card {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  transition: all var(--transition-base);
  background: var(--gray-50);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input::placeholder {
  color: var(--gray-400);
}

/* ============================================
   GRID & LAYOUT
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.flex {
  display: flex;
  gap: var(--spacing-lg);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  flex-direction: column;
}

/* ============================================
   MODALS & OVERLAYS
   ============================================ */

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-400);
  transition: color var(--transition-base);
}

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

/* ============================================
   ALERTS & BADGES
   ============================================ */

.alert {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--spacing-lg);
  animation: slideDown 0.3s ease;
}

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

.alert-success {
  background: #ecfdf5;
  border-color: var(--success);
  color: #065f46;
}

.alert-danger {
  background: #fef2f2;
  border-color: var(--danger);
  color: #7f1d1d;
}

.alert-warning {
  background: #fffbeb;
  border-color: var(--warning);
  color: #78350f;
}

.alert-info {
  background: #eff6ff;
  border-color: var(--info);
  color: #0c2d6b;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* ============================================
   PROGRESS & LOADING
   ============================================ */

.progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
  width: 0%;
  transition: width 0.3s ease;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(102, 126, 234, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ============================================
   UTILITIES
   ============================================ */

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-muted {
  color: var(--gray-500);
}

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

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ============================================
   NAVBAR & PAGE HEADER
   ============================================ */

.navbar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.navbar-brand {
  font-size: 24px;
  font-weight: 800;
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.navbar-brand:hover {
  opacity: 0.9;
}

.navbar-title {
  font-size: 20px;
  font-weight: 600;
  color: white;
}

.navbar-subtitle {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 4px;
}

.navbar-actions {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  flex-wrap: wrap;
}

.navbar-actions .btn {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.navbar-actions .btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

.navbar-actions .btn-secondary {
  background: white;
  color: var(--primary);
  border: none;
}

.page-title {
  margin-bottom: var(--spacing-2xl);
}

.page-title h1 {
  margin-bottom: var(--spacing-sm);
}

.page-title p {
  color: var(--gray-500);
  font-size: 15px;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-900);
  font-size: 14px;
}

.form-group label.required::after {
  content: ' *';
  color: var(--danger);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="time"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  color: var(--gray-900);
  background: white;
  transition: all var(--transition-base);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="datetime-local"]:focus,
input[type="time"]:focus,
input[type="search"]:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input[type="checkbox"],
input[type="radio"] {
  margin-right: var(--spacing-sm);
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.form-row.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.form-row.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.form-helper-text {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: var(--spacing-xs);
}

.form-error-text {
  font-size: 12px;
  color: var(--danger);
  margin-top: var(--spacing-xs);
}

/* ============================================
   STEPPER & PROGRESS
   ============================================ */

.stepper {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.stepper::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gray-200);
  z-index: 0;
}

.stepper-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
  flex: 1;
}

.stepper-step:not(:last-child) {
  margin-right: var(--spacing-lg);
}

.stepper-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--gray-500);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-base);
}

.stepper-step.active .stepper-circle {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

.stepper-step.completed .stepper-circle {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.stepper-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  text-align: center;
}

.stepper-step.active .stepper-label {
  color: var(--primary);
  font-weight: 600;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  h1 { font-size: 24px; }
  h2 { font-size: 20px; }
  h3 { font-size: 18px; }

  .card {
    padding: var(--spacing-lg);
  }

  .modal-content {
    padding: var(--spacing-xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .flex {
    flex-direction: column;
  }

  h1 { font-size: 20px; }
  h2 { font-size: 18px; }
}