:root{--primary: #2563eb;--primary-dark: #1e40af;--secondary: #64748b;--accent: #f59e0b;--success: #10b981;--error: #ef4444;--bg: #f8fafc;--bg-dark: #1e293b;--card: #ffffff;--text: #1e293b;--text-light: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .1);--radius: 12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--card);border-bottom:1px solid var(--border);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}.app-header h1{color:var(--primary);font-size:1.5rem;font-weight:700}.user-info{display:flex;align-items:center;gap:1rem}.user-info span{font-weight:500}main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:2rem}.hero{background:linear-gradient(135deg,var(--primary) 0%,#3b82f6 100%);color:#fff;padding:3rem 2rem;border-radius:var(--radius);margin-bottom:2rem;text-align:center}.hero h2{font-size:2rem;margin-bottom:.5rem}.hero p{font-size:1.1rem;opacity:.9;margin-bottom:1.5rem}.hero-actions{display:flex;gap:1rem;justify-content:center}button{background:var(--primary);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s,transform .1s}button:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px)}button:disabled{opacity:.6;cursor:not-allowed}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;font-size:.9rem;color:var(--text)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit;transition:border-color .2s}.form-group 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a{color:var(--primary);text-decoration:none;font-weight:600}.auth-switch a:hover{text-decoration:underline}.feed h3{margin-bottom:1.5rem;color:var(--text)}.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.post-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;transition:box-shadow .2s}.post-card:hover{box-shadow:var(--shadow)}.post-card h4{margin-bottom:.75rem;color:var(--text)}.post-card p{color:var(--text-light);margin-bottom:1rem;font-size:.95rem}.post-meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--text-light)}.post-meta .tag{background:#eff6ff;color:var(--primary);padding:.2rem .5rem;border-radius:4px;font-size:.75rem}.search-header{text-align:center;margin-bottom:2rem}.search-header h1{color:var(--primary);margin-bottom:.5rem}.search-form{display:flex;gap:1rem;margin-bottom:2rem;max-width:600px;margin-left:auto;margin-right:auto}.search-form input{flex:1;padding:.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem}.destination-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.destination-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;cursor:pointer;transition:box-shadow .2s,transform .1s}.destination-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.destination-card h3{color:var(--text);margin-bottom:.5rem}.destination-card p{color:var(--text-light);margin-bottom:1rem;font-size:.9rem}.destination-meta{display:flex;flex-direction:column;gap:.25rem;font-size:.8rem;color:var(--text-light)}.destination-header{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:2rem}.destination-header h1{color:var(--text);margin-bottom:1rem}.destination-meta{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:1rem;font-size:.9rem;color:var(--text-light)}.destination-summary{color:var(--text);font-size:1.05rem}.destination-content{display:flex;flex-direction:column;gap:2rem}.quick-info{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-top:1rem}.info-item h3{color:var(--text);margin-bottom:.5rem;font-size:1rem}.info-item p{color:var(--text-light);font-size:.9rem}section h2{color:var(--text);margin-bottom:1rem;font-size:1.25rem}.profile-header{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:2rem;display:flex;align-items:center;gap:1.5rem}.profile-avatar{width:80px;height:80px;border-radius:50%;overflow:hidden;background:#eff6ff;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700;color:var(--primary)}.profile-avatar img{width:100%;height:100%;object-fit:cover}.profile-info h1{color:var(--text);margin-bottom:.5rem}.account-badge{background:#eff6ff;color:var(--primary);padding:.25rem .75rem;border-radius:12px;font-size:.8rem;font-weight:600}.profile-stats{display:flex;gap:2rem;margin-bottom:2rem}.stat-item{display:flex;flex-direction:column;align-items:center}.stat-count{font-size:1.5rem;font-weight:700;color:var(--primary)}.stat-label{font-size:.85rem;color:var(--text-light)}.profile-edit{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:2rem}.profile-edit h2{margin-bottom:1rem}.profile-form{margin-top:1rem}.profile-content{display:flex;flex-direction:column;gap:2rem}.profile-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}.profile-section h2{margin-bottom:1rem}.profile-actions{margin-top:2rem;text-align:center}.logout-btn{background:#fee2e2;color:#991b1b}.logout-btn:hover{background:#fecaca}.create-header{text-align:center;margin-bottom:2rem}.create-header h1{color:var(--primary);margin-bottom:.5rem}.create-header p{color:var(--text-light)}.create-post,.create-trip{max-width:600px;margin:0 auto}.post-form,.trip-form,.profile-form{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem}.auth-required{text-align:center;padding:2rem;color:var(--text-light)}.auth-required a{color:var(--primary);text-decoration:none;font-weight:600}.trips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.trip-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem}.trip-card h3{margin-bottom:.5rem;color:var(--text);font-size:1rem}.trip-card p{color:var(--text-light);font-size:.85rem;margin-bottom:.5rem}.trip-meta{font-size:.8rem;color:var(--text-light)}@media (max-width: 768px){.app-header{flex-direction:column;gap:1rem;padding:1rem}main{padding:1rem}.hero{padding:2rem 1rem}.hero h2{font-size:1.5rem}.form-row{grid-template-columns:1fr}.profile-header{flex-direction:column;text-align:center}.profile-stats{justify-content:center}.posts-grid,.destination-grid,.trips-grid{grid-template-columns:1fr}}