/* ===== 庆尘Src漏洞挖掘课 - 共享样式 ===== */
/* 替代 Tailwind CDN JIT，性能提升 10x+ */

/* --- 颜色变量 --- */
:root {
  --primary: #165DFF; --primary-hover: #0040C9;
  --secondary: #FF7D00;
  --success: #00B42A; --success-hover: #059669;
  --danger: #F53F3F;
  --warning: #FF7D00;
  --info: #86909C;
  --dark: #1D2129;
  --light: #F2F3F5;
  --gray-50: #f9fafb; --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;
  --blue-50: #eff6ff; --blue-100: #dbeafe; --blue-500: #3b82f6; --blue-600: #2563eb;
  --blue-700: #1d4ed8; --blue-800: #1e40af;
  --green-50: #f0fdf4; --green-100: #dcfce7; --green-500: #22c55e; --green-600: #16a34a;
  --orange-50: #fff7ed; --orange-100: #ffedd5; --orange-500: #f97316; --orange-600: #ea580c;
  --purple-50: #faf5ff; --purple-100: #f3e8ff; --purple-500: #a855f7; --purple-600: #9333ea;
  --cyan-50: #ecfeff; --cyan-100: #cffafe; --cyan-500: #06b6d4; --cyan-600: #0891b2;
  --red-50: #fef2f2; --red-600: #dc2626; --red-700: #b91c1c;
  --yellow-50: #fefce8; --yellow-100: #fef9c3; --yellow-400: #facc15; --yellow-500: #eab308; --yellow-700: #a16207;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; line-height: 1.6; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
button { border: none; cursor: pointer; }

/* --- Layout --- */
.container { max-width: 800px; margin: 0 auto; }
.max-w-2xl { max-width: 672px; }
.max-w-4xl { max-width: 896px; }
.max-w-7xl { max-width: 1280px; }
.max-w-sm { max-width: 384px; }
.max-w-md { max-width: 448px; }
.max-w-lg { max-width: 512px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.w-full { width: 100%; }
.h-16 { height: 64px; }
.h-40 { height: 160px; }
.min-h-96 { min-height: 384px; }
.fixed { position: fixed; }
.relative { position: relative; }
.absolute { position: absolute; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* --- Flex --- */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-1 { flex: 1 1 0%; }
.space-x-8 > * + * { margin-left: 32px; }
.space-x-6 > * + * { margin-left: 24px; }
.space-y-4 > * + * { margin-top: 16px; }

/* --- Grid --- */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.col-span-2 { grid-column: span 2; }
.gap-6 { gap: 24px; }

/* --- Display --- */
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* --- Typo --- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-xs { font-size: 12px; }
.text-sm { font-size: 14px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.text-3xl { font-size: 30px; }
.text-4xl { font-size: 36px; }
.text-5xl { font-size: 48px; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.uppercase { text-transform: uppercase; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* --- Colors --- */
.text-white { color: #fff; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-dark { color: var(--dark); }
.text-gray-400 { color: var(--gray-400); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-gray-800 { color: var(--gray-800); }
.text-blue-600 { color: var(--blue-600); }
.text-blue-700 { color: var(--blue-700); }
.text-blue-800 { color: var(--blue-800); }
.text-green-600 { color: var(--green-600); }
.text-orange-600 { color: var(--orange-600); }
.text-purple-600 { color: var(--purple-600); }
.text-cyan-600 { color: var(--cyan-600); }
.text-red-600 { color: var(--red-600); }
.text-red-500 { color: #ef4444; }

/* --- Backgrounds --- */
.bg-white { background-color: #fff; }
.bg-black { background-color: #000; }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-gray-800 { background-color: #1f2937; }
.bg-primary { background-color: var(--primary); }
.bg-success { background-color: var(--success); }
.bg-danger { background-color: var(--danger); }
.bg-blue-50 { background-color: #eff6ff; }
.bg-blue-100 { background-color: #dbeafe; }
.bg-green-50 { background-color: #f0fdf4; }
.bg-green-100 { background-color: #dcfce7; }
.bg-red-50 { background-color: #fef2f2; }
.bg-yellow-50 { background-color: #fefce8; }
.bg-orange-100 { background-color: #ffedd5; }
.bg-purple-100 { background-color: #f3e8ff; }
.bg-cyan-100 { background-color: #cffafe; }
.bg-success\/10 { background-color: rgba(0,180,42,0.1); }
.bg-danger\/10 { background-color: rgba(245,63,63,0.1); }
.bg-black\/50 { background-color: rgba(0,0,0,0.5); }
.bg-black\/75 { background-color: rgba(0,0,0,0.75); }
.bg-primary\/5 { background-color: rgba(22,93,255,0.05); }
.bg-primary\/10 { background-color: rgba(22,93,255,0.10); }
.bg-primary\/90 { background-color: rgba(22,93,255,0.90); }
.bg-secondary\/10 { background-color: rgba(255,125,0,0.10); }
.hover\:bg-primary\/90:hover { background-color: rgba(22,93,255,0.90); }

/* --- Gradients --- */
.bg-gradient-blue { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%); }
.bg-gradient-to-r { background-image: linear-gradient(to right, var(--tw-gradient-stops)); }
.from-blue-50 { --tw-gradient-from: #eff6ff; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(239,246,255,0)); }
.to-blue-100 { --tw-gradient-to: #dbeafe; }
.from-green-50 { --tw-gradient-from: #f0fdf4; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(240,253,244,0)); }
.to-green-100 { --tw-gradient-to: #dcfce7; }
.from-orange-50 { --tw-gradient-from: #fff7ed; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(255,247,237,0)); }
.to-orange-100 { --tw-gradient-to: #ffedd5; }
.from-purple-50 { --tw-gradient-from: #faf5ff; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(250,245,255,0)); }
.to-purple-100 { --tw-gradient-to: #f3e8ff; }
.from-cyan-50 { --tw-gradient-from: #ecfeff; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(236,254,255,0)); }
.to-cyan-100 { --tw-gradient-to: #cffafe; }
.from-gray-100 { --tw-gradient-from: #f3f4f6; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(243,244,246,0)); }
.to-gray-200 { --tw-gradient-to: #e5e7eb; }
.bg-gradient-to-br { background-image: linear-gradient(to bottom right, var(--tw-gradient-stops)); }
.from-primary\/5 { --tw-gradient-from: rgba(22,93,255,0.05); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(22,93,255,0)); }
.to-primary\/10 { --tw-gradient-to: rgba(22,93,255,0.10); }

/* --- Borders --- */
.border { border: 1px solid var(--gray-200); }
.border-t { border-top: 1px solid var(--gray-200); }
.border-b { border-bottom: 1px solid var(--gray-200); }
.border-gray-100 { border-color: var(--gray-100); }
.border-gray-200 { border-color: var(--gray-200); }
.border-gray-300 { border-color: var(--gray-300); }
.border-blue-200 { border-color: #bfdbfe; }
.border-primary { border-color: var(--primary); }
.border-success { border-color: var(--success); }
.border-danger { border-color: var(--danger); }
.border-transparent { border-color: transparent; }
.border-l-4 { border-left-width: 4px; }
.border-l { border-left: 1px solid var(--gray-200); }
.border-yellow-400 { border-color: #facc15; }

/* --- Rounded --- */
.rounded { border-radius: 4px; }
.rounded-lg { border-radius: 8px; }
.rounded-xl { border-radius: 12px; }
.rounded-2xl { border-radius: 16px; }
.rounded-full { border-radius: 9999px; }

/* --- Shadows --- */
.shadow-sm { box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1); }
.hover\:shadow-xl:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1); }

/* --- Spacing: Padding --- */
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.px-1 { padding-left: 4px; padding-right: 4px; }
.px-2 { padding-left: 8px; padding-right: 8px; }
.px-3 { padding-left: 12px; padding-right: 12px; }
.px-4 { padding-left: 16px; padding-right: 16px; }
.px-6 { padding-left: 24px; padding-right: 24px; }
.py-1 { padding-top: 4px; padding-bottom: 4px; }
.py-2 { padding-top: 8px; padding-bottom: 8px; }
.py-2\.5 { padding-top: 10px; padding-bottom: 10px; }
.py-6 { padding-top: 24px; padding-bottom: 24px; }
.py-8 { padding-top: 32px; padding-bottom: 32px; }
.pt-1 { padding-top: 4px; }
.pt-2 { padding-top: 8px; }
.pt-8 { padding-top: 32px; }
.pt-16 { padding-top: 64px; }
.pt-24 { padding-top: 96px; }
.pb-4 { padding-bottom: 16px; }
.pb-16 { padding-bottom: 64px; }
.pr-4 { padding-right: 16px; }
.pl-4 { padding-left: 16px; }

/* --- Spacing: Margin --- */
.m-0 { margin: 0; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mt-16 { margin-top: 64px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mb-10 { margin-bottom: 40px; }
.mb-12 { margin-bottom: 48px; }
.mr-1 { margin-right: 4px; }
.mr-2 { margin-right: 8px; }
.ml-1 { margin-left: 4px; }
.ml-2 { margin-left: 8px; }
.ml-3 { margin-left: 12px; }
.ml-4 { margin-left: 16px; }
.ml-auto { margin-left: auto; }

/* --- Buttons --- */
.btn, .btn-primary, .btn-danger, .btn-success, .btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 24px; border-radius: 8px; font-size: 14px;
  font-weight: 500; cursor: pointer; transition: all .2s;
  border: none; text-decoration: none; gap: 8px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: var(--success-hover); }
.btn-secondary { background: #e5e7eb; color: #374151; }
.btn-secondary:hover { background: #d1d5db; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* --- Form --- */
.form-input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--gray-300);
  border-radius: 8px; font-size: 15px; outline: none; transition: border-color .2s;
}
.form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22,93,255,.2); }

/* --- Cards --- */
.card {
  background: #fff; border-radius: 12px; box-shadow: 0 1px 3px rgba(0,0,0,.1);
  border: 1px solid var(--gray-100); overflow: hidden;
}
.card-hover { transition: all .3s; }
.card-hover:hover { transform: translateY(-5px); box-shadow: 0 10px 25px -5px rgba(0,0,0,.1); }

/* --- Badge --- */
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 9999px;
  font-size: 12px; font-weight: 500;
}

/* --- Alerts --- */
.alert { padding: 12px; border-radius: 8px; margin-top: 16px; }
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* --- Nav --- */
nav { background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.1); }
.nav-link { color: var(--gray-500); text-decoration: none; font-size: 14px; font-weight: 500; padding: 4px 4px 12px; }
.nav-link:hover { color: var(--gray-700); }
.nav-link.active { color: var(--primary); border-bottom: 2px solid var(--primary); }

/* --- Table --- */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--gray-200); }
thead { background: var(--gray-100); color: var(--gray-600); font-size: 13px; text-transform: uppercase; }
tbody tr:hover { background: var(--gray-50); }

/* --- Modal --- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex;
  align-items: center; justify-content: center; z-index: 50;
}
.modal-box {
  background: #fff; border-radius: 16px; box-shadow: 0 20px 25px -5px rgba(0,0,0,.2);
  width: 90%; max-width: 500px; padding: 24px; position: relative;
}
.modal-close { position: absolute; top: 16px; right: 16px; color: var(--gray-400); cursor: pointer; background: none; border: none; font-size: 20px; }
.modal-close:hover { color: var(--gray-600); }

/* --- Footer --- */
footer { background: #fff; border-top: 1px solid var(--gray-200); }

/* --- Utilities --- */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.transition-all { transition: all .2s; }
.transition-colors { transition: color .2s, background-color .2s; }
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.ring-1 { box-shadow: 0 0 0 1px rgba(0,0,0,.05); }
.ring-black { --tw-ring-color: rgba(0,0,0,1); }
.ring-opacity-5 { --tw-ring-opacity: .05; }
.object-cover { object-fit: cover; }

/* --- Responsive --- */
@media (min-width: 640px) {
  .sm\:flex { display: flex; }
  .sm\:ml-6 { margin-left: 24px; }
  .sm\:px-6 { padding-left: 24px; padding-right: 24px; }
}
@media (min-width: 768px) {
  .md\:w-auto { width: auto; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:text-4xl { font-size: 36px; }
  .md\:mb-0 { margin-bottom: 0; }
  .md\:flex-row { flex-direction: row; }
}
@media (min-width: 1024px) {
  .lg\:px-8 { padding-left: 32px; padding-right: 32px; }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* --- Animation --- */
@keyframes spin { to { transform: rotate(360deg); } }
.animate-spin { animation: spin 1s linear infinite; }

/* --- Custom scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }