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

/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --bg-primary: #f9fafb;
  --bg-secondary: #ffffff;
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --accent-color: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: #eef2ff;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --transition: 0.2s ease-in-out;
}

/* Dark mode variables */
html.dark {
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --text-primary: #f9fafb;
  --text-secondary: #e5e7eb;
  --text-muted: #9ca3af;
  --card-bg: #1f2937;
  --border-color: #374151;
  --accent-color: #6366f1;
  --accent-hover: #818cf8;
  --accent-light: #1e1b4b;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

/* ============================================================
   Base Styles
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans Devanagari', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color var(--transition), color var(--transition);
  line-height: 1.6;
}

.hindi-text {
  font-family: 'Noto Sans Devanagari', sans-serif;
}

/* ============================================================
   Custom Scrollbar
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-color) var(--bg-primary);
}

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

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

@keyframes pulseOnce {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}

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

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.fade-in {
  animation: fadeIn 0.4s ease-in-out both;
}

.slide-up {
  animation: slideUp 0.5s ease-out both;
}

.pulse-once {
  animation: pulseOnce 0.4s ease-in-out;
}

.slide-up-delay-1 { animation-delay: 0.1s; }
.slide-up-delay-2 { animation-delay: 0.2s; }
.slide-up-delay-3 { animation-delay: 0.3s; }

/* ============================================================
   Card Styles
   ============================================================ */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.tool-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
  transform: scaleX(0);
  transition: transform var(--transition);
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   Tool Form Styles
   ============================================================ */
.tool-form {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.375rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.15);
}

.form-input.error,
.form-select.error {
  border-color: var(--danger-color);
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.15);
}

.form-error-msg {
  font-size: 0.8125rem;
  color: var(--danger-color);
  margin-top: 0.25rem;
  display: none;
}

.form-error-msg.visible {
  display: block;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-primary);
  border-color: var(--accent-color);
}

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.result-box {
  background-color: var(--accent-light);
  border: 1px solid var(--accent-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.result-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
}

.result-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ============================================================
   FAQ Accordion
   ============================================================ */
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open {
  border-color: var(--accent-color);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  cursor: pointer;
  background-color: var(--card-bg);
  font-weight: 500;
  color: var(--text-primary);
  user-select: none;
  transition: background-color var(--transition);
  width: 100%;
  border: none;
  text-align: left;
  font-family: inherit;
  font-size: 0.9375rem;
}

.faq-question:hover {
  background-color: var(--accent-light);
}

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--accent-color);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding var(--transition);
  background-color: var(--card-bg);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  padding: 0 1.25rem;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 1rem 1.25rem;
  transition: max-height 0.45s ease-in, padding var(--transition);
}

/* ============================================================
   Loader / Spinner
   ============================================================ */
.spinner {
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

.spinner-lg {
  width: 3rem;
  height: 3rem;
  border-width: 3px;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(2px);
}

.skeleton {
  background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-secondary) 50%, var(--border-color) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ============================================================
   Modal
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn 0.2s ease;
}

.modal-box {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 42rem;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.modal-close {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition);
  background: none;
  border: none;
  font-size: 1.25rem;
}

.modal-close:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   AI Result
   ============================================================ */
.ai-result {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  white-space: pre-wrap;
  color: var(--text-secondary);
}

.ai-result h1, .ai-result h2, .ai-result h3 {
  color: var(--text-primary);
  font-weight: 600;
  margin: 1rem 0 0.5rem;
}

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

.ai-result ul, .ai-result ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0;
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  transition: background-color var(--transition), border-color var(--transition);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 16rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition);
  z-index: 200;
}

.nav-item:hover .nav-dropdown,
.nav-dropdown:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: all var(--transition);
  text-decoration: none;
}

.nav-dropdown-link:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
  padding-left: 1.25rem;
}

/* ============================================================
   Search
   ============================================================ */
.search-input {
  width: 100%;
  padding: 0.625rem 1rem 0.625rem 2.75rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.15);
}

.search-wrapper {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 0.75rem 0;
}

.breadcrumb a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--accent-hover);
}

.breadcrumb-sep {
  color: var(--border-color);
}

/* ============================================================
   Badges & Tags
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-accent {
  background-color: var(--accent-light);
  color: var(--accent-color);
}

.badge-success {
  background-color: #d1fae5;
  color: #065f46;
}

.badge-warning {
  background-color: #fef3c7;
  color: #92400e;
}

html.dark .badge-success {
  background-color: #064e3b;
  color: #6ee7b7;
}

html.dark .badge-warning {
  background-color: #78350f;
  color: #fcd34d;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  transition: all var(--transition);
}

.sidebar-link:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
}

.sidebar-link.active {
  background-color: var(--accent-light);
  color: var(--accent-color);
  font-weight: 600;
}

.sidebar-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
  margin-top: 0.75rem;
}

/* ============================================================
   Table Styles
   ============================================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.data-table th {
  background-color: var(--bg-primary);
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: var(--accent-light);
}

/* ============================================================
   Responsive Utilities
   ============================================================ */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px)  { .container { max-width: 640px;  padding-left: 1.5rem; padding-right: 1.5rem; } }
@media (min-width: 768px)  { .container { max-width: 768px;  } }
@media (min-width: 1024px) { .container { max-width: 1024px; padding-left: 2rem;   padding-right: 2rem;   } }
@media (min-width: 1280px) { .container { max-width: 1280px; } }

.hide-mobile  { display: none; }
.hide-desktop { display: block; }

@media (min-width: 768px) {
  .hide-mobile  { display: block; }
  .hide-desktop { display: none;  }
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.alert-info {
  background-color: #eff6ff;
  border-color: #3b82f6;
  color: #1e40af;
}

.alert-success {
  background-color: #f0fdf4;
  border-color: var(--success-color);
  color: #166534;
}

.alert-warning {
  background-color: #fffbeb;
  border-color: var(--warning-color);
  color: #92400e;
}

.alert-danger {
  background-color: #fef2f2;
  border-color: var(--danger-color);
  color: #991b1b;
}

html.dark .alert-info    { background-color: #1e3a5f; color: #93c5fd; border-color: #3b82f6; }
html.dark .alert-success { background-color: #064e3b; color: #6ee7b7; border-color: var(--success-color); }
html.dark .alert-warning { background-color: #78350f; color: #fcd34d; border-color: var(--warning-color); }
html.dark .alert-danger  { background-color: #7f1d1d; color: #fca5a5; border-color: var(--danger-color); }

/* ============================================================
   Footer
   ============================================================ */
.footer-link {
  color: #9ca3af;
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition);
  display: block;
  margin-bottom: 0.5rem;
}

.footer-link:hover {
  color: #f9fafb;
}

/* ============================================================
   Misc helpers
   ============================================================ */
.text-gradient {
  background: linear-gradient(135deg, var(--accent-color), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 1.5rem 0;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.copy-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.copy-btn.copied {
  border-color: var(--success-color);
  color: var(--success-color);
}

/* ============================================================
   Blog Post Prose Styles
   ============================================================ */
.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.prose h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.prose p {
  margin-top: 1rem;
  margin-bottom: 1rem;
  line-height: 1.8;
}

.prose ul, .prose ol {
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding-left: 1.75rem;
}

.prose li {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.prose ul li {
  list-style-type: disc;
}

.prose ol li {
  list-style-type: decimal;
}

.prose a {
  color: var(--accent-color);
  text-decoration: underline;
  transition: color var(--transition);
}

.prose a:hover {
  color: var(--accent-hover);
}

.prose strong {
  font-weight: 600;
  color: var(--text-primary);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.prose thead {
  background-color: var(--bg-primary);
}

.prose th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

.prose td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.prose tr:last-child td {
  border-bottom: none;
}

.prose tr:hover td {
  background-color: var(--accent-light);
}

.prose blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 1rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-muted);
  background-color: var(--bg-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.prose details {
  margin-top: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.prose summary {
  cursor: pointer;
  padding: 1rem;
  background-color: var(--bg-primary);
  font-weight: 600;
  color: var(--text-primary);
  transition: background-color var(--transition);
}

.prose summary:hover {
  background-color: var(--accent-light);
}

.prose details[open] summary {
  border-bottom: 1px solid var(--border-color);
}

.prose details > *:not(summary) {
  padding: 1rem;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 1rem 0;
}

.prose code {
  background-color: var(--bg-primary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  color: var(--accent-color);
}

.prose pre {
  background-color: var(--bg-primary);
  padding: 1rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1rem 0;
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}