/**
 * BestSEOTool - Production Stylesheet
 * High-performance, responsive modern UI inspired by Tailwind CSS
 */

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, ::before, ::after {
  box-sizing: border-box;
  border-width: 0;
  border-style: solid;
  border-color: #E2E8F0;
}

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #0F172A;
  background-color: #F8FAFC;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  line-height: inherit;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1 0 auto;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
  margin: 0;
  color: #0F172A;
}

p {
  margin: 0;
}

a {
  color: inherit;
  text-decoration: inherit;
}

button, input, optgroup, select, textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}

button, [type='button'], [type='reset'], [type='submit'] {
  -webkit-appearance: button;
  background-color: transparent;
  background-image: none;
  cursor: pointer;
}

img, svg, video {
  display: block;
  vertical-align: middle;
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Layout Containers & Grid
   ========================================================================== */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: 1rem;
  padding-left: 1rem;
}

@media (min-width: 640px) { .container { max-width: 640px; } }
@media (min-width: 768px) { .container { max-width: 768px; padding-right: 1.5rem; padding-left: 1.5rem; } }
@media (min-width: 1024px) { .container { max-width: 1024px; padding-right: 2rem; padding-left: 2rem; } }
@media (min-width: 1280px) { .container { max-width: 1240px; } }

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-start { justify-content: flex-start; }
.flex-1 { flex: 1 1 0%; }
.flex-shrink-0 { flex-shrink: 0; }

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-10 { gap: 2.5rem; }

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

/* ==========================================================================
   Spacing & Sizing
   ========================================================================== */
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.p-10 { padding: 2.5rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }

.m-0 { margin: 0; }
.my-auto { margin-top: auto; margin-bottom: auto; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.mr-2 { margin-right: 0.5rem; }

.w-full { width: 100%; }
.w-auto { width: auto; }
.min-w-0 { min-width: 0px; }
.w-3 { width: 0.75rem; }
.h-3 { height: 0.75rem; }
.w-3\.5 { width: 0.875rem; }
.h-3\.5 { height: 0.875rem; }
.w-4 { width: 1rem; }
.h-4 { height: 1rem; }
.w-5 { width: 1.25rem; }
.h-5 { height: 1.25rem; }
.w-6 { width: 1.5rem; }
.h-6 { height: 1.5rem; }
.w-7 { width: 1.75rem; }
.h-7 { height: 1.75rem; }
.w-8 { width: 2rem; }
.h-8 { height: 2rem; }
.w-9 { width: 2.25rem; }
.h-9 { height: 2.25rem; }
.w-10 { width: 2.5rem; }
.h-10 { height: 2.5rem; }
.w-11 { width: 2.75rem; }
.h-11 { height: 2.75rem; }
.w-12 { width: 3rem; }
.h-12 { height: 3rem; }
.w-14 { width: 3.5rem; }
.h-14 { height: 3.5rem; }
.w-16 { width: 4rem; }
.h-16 { height: 4rem; }
.w-20 { width: 5rem; }
.h-20 { height: 5rem; }
.w-44 { width: 11rem; }
.w-64 { width: 16rem; }
.w-72 { width: 18rem; }
.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }

/* SVG and Icon constraints: Prevent icons from expanding into giant boxes */
.btn svg, button svg, a svg, .badge svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  max-width: 1.5rem;
  max-height: 1.5rem;
}

/* ==========================================================================
   Colors & Backgrounds
   ========================================================================== */
.bg-white { background-color: #FFFFFF; }
.bg-slate-50 { background-color: #F8FAFC; }
.bg-slate-100 { background-color: #F1F5F9; }
.bg-slate-200 { background-color: #E2E8F0; }
.bg-slate-800 { background-color: #1E293B; }
.bg-slate-900 { background-color: #0F172A; }
.bg-indigo-50 { background-color: #EEF2FF; }
.bg-indigo-100 { background-color: #E0E7FF; }
.bg-indigo-600 { background-color: #4F46E5; }
.bg-indigo-700 { background-color: #4338CA; }
.bg-emerald-50 { background-color: #ECFDF5; }
.bg-emerald-100 { background-color: #D1FAE5; }
.bg-emerald-600 { background-color: #059669; }
.bg-amber-50 { background-color: #FFFBEB; }
.bg-amber-100 { background-color: #FEF3C7; }
.bg-amber-500 { background-color: #F59E0B; }
.bg-rose-50 { background-color: #FFF1F2; }
.bg-rose-100 { background-color: #FFE4E6; }
.bg-rose-600 { background-color: #E11D48; }

.text-white { color: #FFFFFF; }
.text-slate-400 { color: #94A3B8; }
.text-slate-500 { color: #64748B; }
.text-slate-600 { color: #475569; }
.text-slate-700 { color: #334155; }
.text-slate-800 { color: #1E293B; }
.text-slate-900 { color: #0F172A; }
.text-indigo-600 { color: #4F46E5; }
.text-indigo-700 { color: #4338CA; }
.text-emerald-600 { color: #059669; }
.text-emerald-700 { color: #047857; }
.text-amber-600 { color: #D97706; }
.text-amber-700 { color: #B45309; }
.text-rose-600 { color: #E11D48; }

/* Borders & Radius */
.border { border-width: 1px; }
.border-2 { border-width: 2px; }
.border-b { border-bottom-width: 1px; }
.border-t { border-top-width: 1px; }
.border-slate-100 { border-color: #F1F5F9; }
.border-slate-200 { border-color: #E2E8F0; }
.border-slate-300 { border-color: #CBD5E1; }
.border-indigo-100 { border-color: #E0E7FF; }
.border-indigo-200 { border-color: #C7D2FE; }
.border-indigo-500 { border-color: #6366F1; }
.border-emerald-200 { border-color: #A7F3D0; }
.border-amber-200 { border-color: #FDE68A; }
.border-rose-200 { border-color: #FECDD3; }

.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: 0.125rem; }
.rounded { border-radius: 0.25rem; }
.rounded-md { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

/* Shadows */
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
.shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1); }

/* Font Styles */
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.uppercase { text-transform: uppercase; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }

/* Transitions & Interactivity */
.transition { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.duration-150 { transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.hover\:bg-slate-50:hover { background-color: #F8FAFC; }
.hover\:bg-slate-100:hover { background-color: #F1F5F9; }
.hover\:bg-indigo-50:hover { background-color: #EEF2FF; }
.hover\:bg-indigo-700:hover { background-color: #4338CA; }
.hover\:text-indigo-600:hover { color: #4F46E5; }
.hover\:text-indigo-700:hover { color: #4338CA; }
.hover\:border-indigo-300:hover { border-color: #A5B4FC; }
.hover\:shadow-md:hover { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1); }
.hover\:-translate-y-0\.5:hover { transform: translateY(-2px); }

/* Forms & Inputs */
.form-input, .form-select, .form-textarea {
  width: 100%;
  border-radius: 0.5rem;
  border: 1px solid #CBD5E1;
  background-color: #FFFFFF;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  color: #0F172A;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: #6366F1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 0.375rem;
}

.form-hint {
  font-size: 0.75rem;
  color: #64748B;
  margin-top: 0.25rem;
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.5rem;
  transition: all 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  border-radius: 0.375rem;
}

.btn-lg {
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  border-radius: 0.625rem;
}

.btn-primary {
  background-color: #4F46E5;
  color: #FFFFFF;
  border-color: #4F46E5;
}
.btn-primary:hover {
  background-color: #4338CA;
  border-color: #4338CA;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: #334155;
  border-color: #CBD5E1;
}
.btn-secondary:hover {
  background-color: #F8FAFC;
  border-color: #94A3B8;
  color: #0F172A;
}

.btn-success {
  background-color: #059669;
  color: #FFFFFF;
  border-color: #059669;
}
.btn-success:hover {
  background-color: #047857;
}

.btn-danger {
  background-color: #E11D48;
  color: #FFFFFF;
  border-color: #E11D48;
}
.btn-danger:hover {
  background-color: #BE123C;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  line-height: 1.25;
}

.badge-indigo { background-color: #EEF2FF; color: #4338CA; }
.badge-emerald { background-color: #ECFDF5; color: #047857; }
.badge-amber { background-color: #FFFBEB; color: #B45309; }
.badge-rose { background-color: #FFF1F2; color: #BE123C; }
.badge-slate { background-color: #F1F5F9; color: #475569; }

/* Rank Badges */
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 9999px;
  font-weight: 800;
  font-size: 0.875rem;
}

.rank-gold {
  background: linear-gradient(135deg, #FDE68A 0%, #F59E0B 100%);
  color: #78350F;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
  border: 1px solid #FCD34D;
}

.rank-silver {
  background: linear-gradient(135deg, #F1F5F9 0%, #CBD5E1 100%);
  color: #334155;
  box-shadow: 0 2px 5px rgba(100, 116, 139, 0.25);
  border: 1px solid #E2E8F0;
}

.rank-bronze {
  background: linear-gradient(135deg, #FED7AA 0%, #EA580C 100%);
  color: #7C2D12;
  box-shadow: 0 2px 5px rgba(234, 88, 12, 0.25);
  border: 1px solid #FDBA74;
}

.rank-standard {
  background-color: #F8FAFC;
  color: #64748B;
  border: 1px solid #E2E8F0;
}

/* Card components */
.card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table th {
  background-color: #F8FAFC;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748B;
  border-bottom: 1px solid #E2E8F0;
}

.table td {
  padding: 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid #F1F5F9;
  vertical-align: middle;
}

.table tr:hover td {
  background-color: #F8FAFC;
}

/* Alert boxes */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.alert-success { background-color: #ECFDF5; border: 1px solid #A7F3D0; color: #065F46; }
.alert-error { background-color: #FFF1F2; border: 1px solid #FECDD3; color: #9F1239; }
.alert-info { background-color: #EEF2FF; border: 1px solid #C7D2FE; color: #3730A3; }
.alert-warning { background-color: #FFFBEB; border: 1px solid #FDE68A; color: #92400E; }

/* ==========================================================================
   Responsive Breakpoints & Layout Overrides (Cascade Priority)
   ========================================================================== */
@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .sm\:flex-row { flex-direction: row !important; }
  .sm\:flex-col { flex-direction: column !important; }
  .sm\:w-auto { width: auto !important; }
  .sm\:w-full { width: 100% !important; }
  .sm\:items-center { align-items: center !important; }
  .sm\:items-start { align-items: flex-start !important; }
  .sm\:justify-start { justify-content: flex-start !important; }
  .sm\:justify-between { justify-content: space-between !important; }
  .sm\:text-left { text-align: left !important; }
  .sm\:text-center { text-align: center !important; }
  .sm\:p-6 { padding: 1.5rem !important; }
  .sm\:gap-5 { gap: 1.25rem !important; }
  .sm\:inline { display: inline !important; }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }
  .md\:flex-row { flex-direction: row !important; }
  .md\:flex-col { flex-direction: column !important; }
  .md\:items-center { align-items: center !important; }
  .md\:justify-between { justify-content: space-between !important; }
  .md\:block { display: block !important; }
  .md\:hidden { display: none !important; }
  .md\:flex { display: flex !important; }
  .md\:w-auto { width: auto !important; }
  .md\:w-44 { width: 11rem !important; }
  .md\:w-64 { width: 16rem !important; }
  .md\:w-72 { width: 18rem !important; }
  .md\:w-full { width: 100% !important; }
  .md\:p-8 { padding: 2rem !important; }
  .md\:gap-6 { gap: 1.5rem !important; }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }
  .lg\:flex { display: flex !important; }
  .lg\:hidden { display: none !important; }
  .lg\:w-auto { width: auto !important; }
}

/* ==========================================================================
   Admin & Responsive Architecture
   ========================================================================== */
.admin-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #F8FAFC;
  width: 100%;
}

.admin-sidebar {
  width: 100%;
  background-color: #0F172A;
  color: #CBD5E1;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .admin-layout {
    flex-direction: row !important;
  }
  .admin-sidebar {
    width: 16rem !important;
    min-width: 16rem !important;
    max-width: 16rem !important;
    height: 100vh !important;
    position: sticky !important;
    top: 0 !important;
    overflow-y: auto;
  }
  .admin-main {
    flex: 1 1 0% !important;
    min-width: 0 !important;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #F8FAFC;
    overflow-x: hidden;
  }
}