:root{--color-primary: #87CEEB;--color-primary-light: #B0E0E6;--color-primary-dark: #5F9EA0;--color-black: #1A1A1A;--color-black-light: #2C2C2C;--color-white: #FFFFFF;--color-gray-50: #F9FAFB;--color-gray-100: #F3F4F6;--color-gray-200: #E5E7EB;--color-gray-300: #D1D5DB;--color-gray-400: #9CA3AF;--color-gray-500: #6B7280;--color-gray-600: #4B5563;--color-gray-700: #374151;--color-gray-800: #1F2937;--color-gray-900: #111827;--color-success: #10B981;--color-warning: #F59E0B;--color-error: #EF4444;--color-info: #3B82F6;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-xs: .75rem;--font-sm: .875rem;--font-base: 1rem;--font-lg: 1.125rem;--font-xl: 1.25rem;--font-2xl: 1.5rem;--font-3xl: 1.875rem;--font-4xl: 2.25rem;--font-5xl: 3rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--container-max-width: 1280px;--container-padding: 2rem}@media (max-width: 768px){:root{--container-padding: 1.5rem}}@media (max-width: 640px){:root{--container-padding: 1rem}}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-family);font-size:var(--font-base);color:var(--color-gray-900);background-color:var(--color-white);line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:var(--container-max-width);margin:0 auto;padding:0 var(--container-padding)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:var(--space-4);color:var(--color-black)}h1{font-size:var(--font-4xl)}h2{font-size:var(--font-3xl)}h3{font-size:var(--font-2xl)}h4{font-size:var(--font-xl)}h5{font-size:var(--font-lg)}h6{font-size:var(--font-base)}@media (min-width: 768px){h1{font-size:var(--font-5xl)}h2{font-size:var(--font-4xl)}h3{font-size:var(--font-3xl)}}p{margin-bottom:var(--space-4);color:var(--color-gray-600)}a{text-decoration:none;color:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);border:none;border-radius:var(--radius-full);font-weight:600;font-size:var(--font-base);cursor:pointer;transition:all var(--transition-base)}.btn-primary{background-color:var(--color-black);color:var(--color-white)}.btn-primary:hover{background-color:var(--color-black-light);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:var(--color-primary);color:var(--color-black)}.btn-secondary:hover{background-color:var(--color-primary-dark);transform:translateY(-2px)}.btn-outline{background-color:transparent;border:2px solid var(--color-black);color:var(--color-black)}.btn-outline:hover{background-color:var(--color-black);color:var(--color-white);transform:translateY(-2px)}.card{background:var(--color-white);border-radius:var(--radius-xl);overflow:hidden;transition:all var(--transition-base);box-shadow:var(--shadow-sm);text-decoration:none;display:block}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl)}.card-image{width:100%;height:200px;background-color:var(--color-gray-100);display:flex;align-items:center;justify-content:center;font-size:4rem}.card-content{padding:var(--space-5)}.card-title{font-weight:600;font-size:var(--font-lg);margin-bottom:var(--space-2);color:var(--color-black)}.card-seller{font-size:var(--font-sm);color:var(--color-gray-500);margin-bottom:var(--space-2)}.card-price{font-size:var(--font-xl);font-weight:700;color:var(--color-black)}.card-old-price{font-size:var(--font-sm);color:var(--color-gray-400);text-decoration:line-through;margin-left:var(--space-2)}.grid{display:grid;gap:var(--space-6)}.grid-cols-1{grid-template-columns:repeat(1,1fr)}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}.grid-cols-5{grid-template-columns:repeat(5,1fr)}@media (max-width: 1024px){.grid-cols-4,.grid-cols-5{grid-template-columns:repeat(3,1fr)}}@media (max-width: 768px){.grid-cols-3,.grid-cols-4,.grid-cols-5{grid-template-columns:repeat(2,1fr)}}@media (max-width: 480px){.grid-cols-2,.grid-cols-3,.grid-cols-4,.grid-cols-5{grid-template-columns:1fr}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-1{gap:var(--space-1)}.gap-2{gap:var(--space-2)}.gap-3{gap:var(--space-3)}.gap-4{gap:var(--space-4)}.gap-6{gap:var(--space-6)}.mt-1{margin-top:var(--space-1)}.mt-2{margin-top:var(--space-2)}.mt-3{margin-top:var(--space-3)}.mt-4{margin-top:var(--space-4)}.mt-6{margin-top:var(--space-6)}.mt-8{margin-top:var(--space-8)}.mt-12{margin-top:var(--space-12)}.mt-16{margin-top:var(--space-16)}.mb-1{margin-bottom:var(--space-1)}.mb-2{margin-bottom:var(--space-2)}.mb-3{margin-bottom:var(--space-3)}.mb-4{margin-bottom:var(--space-4)}.mb-6{margin-bottom:var(--space-6)}.mb-8{margin-bottom:var(--space-8)}.mb-12{margin-bottom:var(--space-12)}.p-4{padding:var(--space-4)}.p-6{padding:var(--space-6)}.p-8{padding:var(--space-8)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-sm{font-size:var(--font-sm)}.text-base{font-size:var(--font-base)}.text-lg{font-size:var(--font-lg)}.text-xl{font-size:var(--font-xl)}.text-2xl{font-size:var(--font-2xl)}.text-3xl{font-size:var(--font-3xl)}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}.text-primary{color:var(--color-primary)}.text-black{color:var(--color-black)}.text-white{color:var(--color-white)}.text-gray{color:var(--color-gray-500)}.bg-primary{background-color:var(--color-primary)}.bg-black{background-color:var(--color-black)}.bg-white{background-color:var(--color-white)}.bg-gray-50{background-color:var(--color-gray-50)}.bg-gray-100{background-color:var(--color-gray-100)}.badge{display:inline-flex;padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);font-size:var(--font-xs);font-weight:600}.badge-primary{background:var(--color-primary);color:var(--color-black)}.badge-success{background:#D1FAE5;color:#065f46}.badge-warning{background:#FEF3C7;color:#92400e}.badge-error{background:#FEE2E2;color:#991b1b}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .5s ease-out}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-gray-100);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb{background:var(--color-primary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-primary-dark)}.navbar{position:fixed;top:0;left:0;right:0;background:white;box-shadow:var(--shadow-md);z-index:1000;padding:.75rem 0}.footer{background:var(--color-black);color:var(--color-gray-400);padding:3rem 0 1.5rem;margin-top:auto}.section{padding:var(--space-16) 0}.section-title{font-size:var(--font-3xl);font-weight:700;text-align:center;margin-bottom:var(--space-8)}.section-title span{color:var(--color-primary)}@media (max-width: 768px){.section{padding:var(--space-8) 0}.section-title{font-size:var(--font-2xl)}}.relative{position:relative}.absolute{position:absolute}.fixed{position:fixed}.sticky{position:sticky}.top-0{top:0}.left-0{left:0}.right-0{right:0}.z-10{z-index:10}.z-20{z-index:20}.z-30{z-index:30}.z-40{z-index:40}.z-50{z-index:50}.w-full{width:100%}.h-full{height:100%}.min-h-screen{min-height:100vh}.overflow-hidden{overflow:hidden}.overflow-x-auto{overflow-x:auto}.cursor-pointer{cursor:pointer}.sticky-top{position:sticky;top:100px}:root{--transition-fast: .15s ease;--transition-base: .3s ease;--transition-slow: .5s ease}.form-group{margin-bottom:1.25rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;font-size:.875rem;color:#374151}.form-input{width:100%;padding:.75rem 1rem;border:1px solid #e5e7eb;border-radius:.75rem;font-size:1rem;transition:all .2s ease;background:#ffffff}.form-input:focus{outline:none;border-color:#87ceeb;box-shadow:0 0 0 3px #87ceeb1a}.form-input.error{border-color:#ef4444}.form-error{color:#ef4444;font-size:.75rem;margin-top:.25rem}