:root{--color-primary:#0a2540;--color-primary-light:#1e3a5f;--color-primary-dark:#061829;--color-accent:#00c389;--color-accent-light:#2edba3;--color-accent-dark:#00a775;--gradient-primary:linear-gradient(135deg,#00c389 0%,#1e3a5f 100%);--gradient-accent:linear-gradient(135deg,#00c389 0%,#00a775 100%);--icon-color:#1e3a5f;--bg-primary:#f8f9fa;--bg-secondary:#fff;--bg-tertiary:#e9ecef;--bg-card:#fff;--text-primary:#1a1a2e;--text-secondary:#4a5568;--text-muted:#718096;--text-inverse:#fff;--post-swap:#3b82f6;--post-swap-bg:#3b82f61a;--post-giveaway:#10b981;--post-giveaway-bg:#10b9811a;--post-request:#f59e0b;--post-request-bg:#f59e0b1a;--status-active:#10b981;--status-pending:#f59e0b;--status-completed:#6b7280;--status-expired:#ef4444;--border-color:#e2e8f0;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px #00000012;--shadow-lg:0 10px 25px #0000001a;--shadow-accent:0 4px 14px #00c3894d;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--transition-fast:.15s ease;--transition-normal:.25s ease;--nav-height:64px}[data-theme=dark]{--color-primary:#1e3a5f;--color-primary-light:#2d4a6f;--color-primary-dark:#0a2540;--color-accent:#2edba3;--color-accent-light:#5ee8ba;--color-accent-dark:#00c389;--icon-color:#fff;--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--text-inverse:#0f172a;--post-swap-bg:#3b82f626;--post-giveaway-bg:#10b98126;--post-request-bg:#f59e0b26;--border-color:#334155;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 6px #0006;--shadow-lg:0 10px 25px #00000080;--shadow-accent:0 4px 14px #2edba340}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;transition:background-color var(--transition-normal),color var(--transition-normal);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}h1,h2,h3,h4,h5,h6{color:var(--text-primary);font-weight:600;line-height:1.3}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.125rem}p{color:var(--text-secondary)}a{color:var(--color-accent);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-accent-light)}.container{max-width:480px;margin:0 auto;padding:0 16px}.page{padding-top:16px;padding-bottom:calc(var(--nav-height) + 24px);min-height:100vh}.btn{border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:1rem;font-weight:500;text-decoration:none;display:inline-flex}.btn-primary{background:linear-gradient(135deg,var(--color-primary)0%,var(--color-primary-light)100%);color:var(--text-inverse);box-shadow:var(--shadow-md)}.btn-primary:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--border-color)}.btn-accent{background:linear-gradient(135deg,var(--color-accent)0%,var(--color-accent-light)100%);color:var(--text-inverse);box-shadow:var(--shadow-md)}.btn-accent:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-ghost{color:var(--text-secondary);background:0 0}.btn-ghost:hover{background:var(--bg-tertiary);color:var(--text-primary)}.btn-sm{padding:8px 16px;font-size:.875rem}.btn-block{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.form-group{margin-bottom:20px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:.875rem;font-weight:500;display:block}.form-input{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-primary);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);padding:12px 16px;font-size:1rem}.form-input:focus{border-color:var(--color-accent);outline:none;box-shadow:0 0 0 3px #c9a22726}.form-input::placeholder{color:var(--text-muted)}.form-input:disabled{background:var(--bg-tertiary);cursor:not-allowed}.form-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:36px}.form-error{color:var(--status-expired);margin-top:6px;font-size:.875rem}.card{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);transition:transform var(--transition-fast),box-shadow var(--transition-fast);padding:20px}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.card-body{margin-bottom:12px}.card-footer{border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;padding-top:12px;display:flex}.badge{border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:4px;padding:4px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.badge-swap{background:var(--post-swap-bg);color:var(--post-swap)}.badge-giveaway{background:var(--post-giveaway-bg);color:var(--post-giveaway)}.badge-request{background:var(--post-request-bg);color:var(--post-request)}.status-dot{border-radius:50%;width:8px;height:8px;display:inline-block}.status-dot-active{background:var(--status-active);box-shadow:0 0 8px var(--status-active)}.status-dot-pending{background:var(--status-pending);animation:2s infinite pulse}.status-dot-completed{background:var(--status-completed)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.post-card{position:relative;overflow:hidden}.post-card-swap{border-left:4px solid var(--post-swap)}.post-card-giveaway{border-left:4px solid var(--post-giveaway)}.post-card-request{border-left:4px solid var(--post-request)}.post-course-id{color:var(--text-primary);font-family:JetBrains Mono,monospace;font-size:1.25rem;font-weight:700}.post-course-name{color:var(--text-secondary);margin-top:2px;font-size:.875rem}.post-section-info{background:var(--bg-tertiary);border-radius:var(--radius-md);align-items:center;gap:8px;margin-top:12px;padding:12px;display:flex}.post-section-label{text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:600}.post-section-value{color:var(--text-primary);font-size:1rem;font-weight:600}.post-arrow{color:var(--color-accent);font-size:1.25rem}.post-meta{color:var(--text-muted);align-items:center;gap:12px;font-size:.875rem;display:flex}.bottom-nav{height:var(--nav-height);background:var(--bg-secondary);border-top:1px solid var(--border-color);z-index:100;justify-content:space-around;align-items:center;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 10px #0000000d}.nav-item{color:var(--text-muted);transition:color var(--transition-fast);flex-direction:column;align-items:center;gap:4px;padding:8px 16px;font-size:.75rem;text-decoration:none;display:flex}.nav-item:hover,.nav-item.active{color:var(--color-accent)}.nav-icon{font-size:1.5rem}.search-container{margin-bottom:20px;position:relative}.search-input{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;color:var(--text-primary);transition:all var(--transition-fast);padding:14px 16px 14px 44px;font-size:1rem}.search-input:focus{border-color:var(--color-accent);outline:none;box-shadow:0 0 0 3px #c9a22726}.search-icon{color:var(--text-muted);font-size:1.25rem;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.filter-tabs{gap:8px;margin-bottom:20px;padding-bottom:4px;display:flex;overflow-x:auto}.filter-tab{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-full);color:var(--text-secondary);cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);padding:8px 16px;font-size:.875rem;font-weight:500}.filter-tab:hover{border-color:var(--color-accent);color:var(--color-accent)}.filter-tab.active{background:var(--color-accent);border-color:var(--color-accent);color:var(--text-inverse)}.empty-state{text-align:center;padding:48px 24px}.empty-state-icon{opacity:.5;margin-bottom:16px;font-size:4rem}.empty-state-title{margin-bottom:8px;font-size:1.25rem;font-weight:600}.empty-state-text{color:var(--text-muted);margin-bottom:24px}.loading-spinner{border:2px solid var(--border-color);border-top-color:var(--color-accent);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary)25%,var(--border-color)50%,var(--bg-tertiary)75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.toast{bottom:calc(var(--nav-height) + 16px);background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);z-index:200;padding:12px 24px;animation:.3s slideUp;position:fixed;left:50%;transform:translate(-50%)}@keyframes slideUp{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}.toast-success{border-left:4px solid var(--status-active)}.toast-error{border-left:4px solid var(--status-expired)}.toast-warning{border-left:4px solid var(--status-pending)}.theme-toggle{background:var(--bg-tertiary);border-radius:var(--radius-full);cursor:pointer;width:48px;height:24px;transition:background var(--transition-fast);position:relative}.theme-toggle-thumb{background:var(--color-accent);width:20px;height:20px;transition:transform var(--transition-fast);border-radius:50%;justify-content:center;align-items:center;font-size:12px;display:flex;position:absolute;top:2px;left:2px}[data-theme=dark] .theme-toggle-thumb{transform:translate(24px)}@media (min-width:768px){.container{max-width:600px}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:4px}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.text-center{text-align:center}.text-sm{font-size:.875rem}.text-xs{font-size:.75rem}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}.text-muted{color:var(--text-muted)}.hidden{display:none}