﻿.exchange-index-container{background:linear-gradient(135deg, #f0fdf4 0%, #f7fafc 100%);min-height:100vh}.exchange-header{background:linear-gradient(135deg, #188550 0%, #22c55e 100%);padding:32px;border-radius:16px;box-shadow:0 8px 24px rgba(24,133,80,0.2);margin-bottom:24px}.exchange-title{font-size:32px;font-weight:700;color:white;margin:0;text-shadow:0 2px 4px rgba(0,0,0,0.1)}.exchange-title i{color:#fef3c7}.exchange-subtitle{color:rgba(255,255,255,0.9);margin:8px 0 0 0;font-size:16px;font-weight:500}.nav-tabs{border-bottom:none;background:white;padding:8px;border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,0.08);margin-bottom:24px}.nav-tabs .nav-link{border:none;color:#64748b;font-weight:600;padding:14px 28px;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);border-radius:12px;margin:0 4px;position:relative}.nav-tabs .nav-link:hover{color:#188550;background:#f0fdf4;transform:translateY(-2px)}.nav-tabs .nav-link.active{color:white;background-color:#188550;box-shadow:0 4px 12px 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i{transform:translateX(3px)}.book-card{background:white;border-radius:16px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,0.06);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);cursor:pointer;border:2px solid transparent;position:relative}.book-card::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg, rgba(24,133,80,0.1) 0%, transparent 100%);opacity:0;transition:opacity 0.3s}.book-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 16px 40px rgba(24,133,80,0.2);border-color:#188550}.book-card:hover::after{opacity:1}.book-cover{width:100%;aspect-ratio:2/3;object-fit:cover}.book-info{padding:12px}.book-title{font-weight:600;color:#1a202c;font-size:14px;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.book-author{color:#718096;font-size:12px;margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-card{background:white;border-radius:16px;padding:24px;box-shadow:0 4px 16px 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-8px}.books-grid-mobile>div{padding:0 8px}.book-card-item{border-radius:12px}.book-card-image{height:180px}.book-card-body{padding:10px}.book-card-title{font-size:13px;min-height:36px}.book-card-author{font-size:12px}.book-card-meta{flex-wrap:wrap;gap:4px}.book-card-meta .condition-badge{font-size:10px;padding:3px 8px}.book-card-price{font-size:12px}.book-card-location{font-size:11px;padding:4px 8px}.book-card-post{padding-top:8px}.post-user-avatar{width:20px;height:20px}.post-user-name{font-size:11px}.book-detail-content{flex-direction:column}.book-detail-image{width:160px;margin:0 auto 20px}.book-detail-title{font-size:20px;text-align:center}.book-detail-author{font-size:14px;justify-content:center}.book-detail-meta{display:grid;grid-template-columns:repeat(2, 1fr);gap:0}.book-detail-meta .meta-item{flex-direction:column;align-items:flex-start;gap:6px;padding:10px 12px;border-bottom:1px solid #e5e7eb}.book-detail-meta .meta-item:nth-child(odd){border-right:1px solid 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i{color:white}.more-categories-dropdown{display:flex;flex-direction:column;gap:6px;margin-bottom:8px;animation:slideDown 0.3s ease-out}@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.btn-toggle-categories{width:100%;padding:10px;background:white;border:2px dashed #d1d5db;border-radius:8px;color:#6b7280;font-size:13px;font-weight:600;cursor:pointer;transition:all 0.2s;display:flex;align-items:center;justify-content:center;gap:8px}.btn-toggle-categories:hover{border-color:#188550;color:#188550;background:#f0fdf4}.btn-toggle-categories i{font-size:12px}.btn-reset-filters{width:100%;padding:12px;background:white;border:2px solid #ef4444;border-radius:10px;color:#ef4444;font-weight:600;cursor:pointer;transition:all 0.3s;display:flex;align-items:center;justify-content:center;gap:8px}.btn-reset-filters:hover{background:#ef4444;color:white;transform:translateY(-2px);box-shadow:0 4px 12px rgba(239,68,68,0.3)}.btn-outline-primary{border:2px solid #188550;color:#188550;font-weight:600;border-radius:10px;padding:10px 20px;transition:all 0.3s;text-decoration:none;display:inline-flex;align-items:center;gap:8px}.btn-outline-primary:hover{background:#188550;color:white !important;border-color:#188550;transform:translateY(-2px);box-shadow:0 4px 12px rgba(24,133,80,0.3);text-decoration:none}.btn-outline-primary:focus{outline:none;box-shadow:0 0 0 3px rgba(24,133,80,0.2)}.btn-outline-secondary{border:2px solid #e2e8f0;color:#64748b;font-weight:600;border-radius:10px;transition:all 0.3s}.btn-outline-secondary:hover{background:#f8fafc;border-color:#cbd5e1;transform:translateY(-1px)}.fa-spinner{color:#188550 !important}*{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f5f9;border-radius:4px}::-webkit-scrollbar-thumb{background:#188550;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#166d42}.exchange-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.6);display:flex;align-items:center;justify-content:center;z-index:9999;padding:20px;backdrop-filter:blur(4px)}.exchange-modal{background:white;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,0.3);max-width:600px;width:100%;max-height:90vh;display:flex;flex-direction:column;animation:modalSlideIn 0.3s ease-out}.exchange-modal-large{max-width:900px}@keyframes modalSlideIn{from{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}.exchange-modal-header{padding:24px 28px;border-bottom:2px solid 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