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16px;font-weight:800;text-decoration:none;display:inline-flex}.hero-primary{background:var(--primary-color);color:var(--primary-foreground)}.hero-secondary{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-color)}.hero-welcome{color:var(--text-secondary);margin-top:22px}.quick-action-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:18px;display:grid}.quick-action-card{border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-secondary);min-height:132px;color:var(--text-primary);box-shadow:var(--shadow-sm);padding:16px;text-decoration:none;transition:transform .15s,border-color .15s;position:relative}.quick-action-card:hover{border-color:var(--primary-color);transform:translateY(-2px)}.quick-action-icon{border-radius:var(--radius-md);background:var(--primary-color);place-items:center;width:36px;height:36px;display:grid}@supports (color:color-mix(in lab, red, red)){.quick-action-icon{background:color-mix(in srgb, var(--primary-color) 12%, transparent)}}.quick-action-icon{color:var(--primary-color);margin-bottom:12px}.field-label{color:var(--text-primary);flex-direction:column;gap:7px;font-size:14px;font-weight:700;display:flex}.quick-action-card h2{margin:0 0 8px;font-size:16px}.quick-action-card p{color:var(--text-secondary);margin:0;font-size:14px;line-height:1.5}.quick-action-arrow{color:var(--text-secondary);position:absolute;top:20px;right:18px}.filter-bar{border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-secondary);gap:12px;margin-bottom:18px;padding:12px;display:flex}.search-input{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);color:var(--text-secondary);flex:1;align-items:center;gap:10px;padding:0 12px;display:flex}.search-input input,.filter-bar select{width:100%;height:42px;color:var(--text-primary);background:0 0;border:none;outline:none}.filter-bar select{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);max-width:180px;padding:0 12px}.status-dot{width:30px;height:30px;color:var(--success);background:var(--success);border-radius:999px;place-items:center;display:grid}@supports (color:color-mix(in lab, red, red)){.status-dot{background:color-mix(in srgb, var(--success) 12%, transparent)}}.tag-list,.table-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.tag-pill{color:var(--text-secondary);background:var(--muted);border-radius:999px;padding:4px 8px;font-size:12px}.profile-card{background:var(--bg-secondary);border-radius:var(--radius-lg);max-width:600px;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);margin:40px auto;padding:32px}.profile-info{flex-direction:column;gap:12px;margin-top:24px;display:flex}.profile-info p{color:var(--text-secondary);margin:0;font-size:16px}.profile-info strong{color:var(--text-primary);width:100px;display:inline-block}.admin-actions{gap:10px;display:flex}.edit-btn{color:#fff;background:#2563eb;border-radius:6px;padding:6px 12px;font-size:14px;text-decoration:none}.edit-btn:hover{background:#1d4ed8}.delete-btn{color:#fff;cursor:pointer;background:#dc2626;border:none;border-radius:6px;padding:6px 12px;font-size:14px}.add-problem-container{max-width:1400px;margin:auto;padding:30px}.form-header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:25px;display:flex}.problem-form-grid{grid-template-columns:1fr 1fr;gap:25px;display:grid}.left-panel,.right-panel{flex-direction:column;gap:20px;display:flex}.form-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;padding:20px;box-shadow:0 1px 3px #0000000f}.form-card h2{align-items:center;gap:8px;margin-bottom:15px;display:flex}.form-card input,.form-card textarea,.form-card select{border:1px solid var(--input);box-sizing:border-box;background:var(--bg-primary);width:100%;color:var(--text-primary);border-radius:8px;margin-bottom:15px;padding:12px;font-size:14px}.form-card textarea{resize:vertical}.form-card input:focus,.form-card textarea:focus,.form-card select:focus{border-color:#2563eb;outline:none}.section-header{justify-content:space-between;align-items:center;margin-bottom:15px;display:flex}.example-card,.testcase-card{border:1px solid var(--border-color);background:var(--bg-primary);border-radius:10px;margin-bottom:15px;padding:15px}.add-btn{color:#fff;cursor:pointer;background:#16a34a;border:none;border-radius:8px;padding:8px 14px}.add-btn:hover{background:#15803d}.delete-btn{color:#fff;cursor:pointer;background:#dc2626;border:none;border-radius:8px;padding:8px 14px}.delete-btn:hover{background:#b91c1c}.submit-btn{background:var(--primary-color);color:var(--primary-foreground);cursor:pointer;border:none;border-radius:8px;padding:12px 20px;font-weight:600}.submit-btn:hover{background:var(--primary-hover)}@media (width<=900px){.problem-form-grid{grid-template-columns:1fr}.quick-action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-section{padding:34px 22px}}@media (width<=640px){.quick-action-grid{grid-template-columns:1fr}.page-heading-row,.filter-bar,.form-header{flex-direction:column;align-items:stretch}.filter-bar select{max-width:none}}.page-header{flex-direction:column;justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.add-problem-btn{color:#fff;background:#2563eb;border-radius:8px;padding:10px 18px;font-weight:600;text-decoration:none;transition:all .2s}.add-problem-btn:hover{background:#1d4ed8;transform:translateY(-1px)}.add-problem-btn:active{transform:translateY(0)}.submission-table-container{width:100%;padding:20px;overflow-x:auto}.submission-table{border-collapse:collapse;background:#fff;border-radius:12px;width:100%;overflow:hidden;box-shadow:0 2px 10px #0000001a}.submission-table thead{color:#fff;background:#1f2937}.submission-table th,.submission-table td{text-align:left;padding:14px 18px}.submission-table th{font-weight:600}.accepted{color:#16a34a;font-weight:600}.rejected{color:#dc2626;font-weight:600}.easy{color:#22c55e;font-weight:600}.medium{color:#f59e0b;font-weight:600}.hard{color:#ef4444;font-weight:600}.submission-table{color:#e2e8f0;background:#1e293b}.submission-table thead{background:#0f172a}.submission-table tbody tr{border-bottom:1px solid #334155}.submission-table tbody tr:hover{background:#293548}.email-verification-banner{color:#5c4300;text-align:center;box-sizing:border-box;background:#fff4cc;border-bottom:1px solid #e3c869;flex-wrap:wrap;justify-content:center;gap:12px;width:100%;padding:10px 16px;font-size:14px;display:flex}.email-verification-banner a{color:#1d4ed8;font-weight:700}.state-box{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);margin:16px 0;padding:16px}.state-error{color:#991b1b;background:#fee2e2;border-color:#fecaca}.state-success{color:#166534;background:#dcfce7;border-color:#bbf7d0}.stack{flex-direction:column;gap:12px;display:flex}.list-card,.comment-card,.mini-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:16px}.list-card{justify-content:space-between;align-items:center;gap:16px;display:flex}.vertical{flex-direction:column;align-items:stretch}.card-title{color:var(--text-primary);font-weight:700;text-decoration:none}.card-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.muted{color:var(--text-secondary);font-size:14px}.inline-form{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;gap:12px;margin-bottom:20px;padding:16px;display:flex}.pagination{justify-content:center;align-items:center;gap:12px;margin:20px 0;display:flex}.pagination button,.question-nav button{border:1px solid var(--border-color);background:var(--bg-secondary);border-radius:var(--radius-sm);cursor:pointer;padding:8px 12px}.pagination button:disabled{opacity:.5;cursor:not-allowed}.section-block{margin-top:24px}.tag-row{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;display:grid}.mock-layout{padding:12px}.mock-header{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;padding:12px;display:flex}.question-nav{gap:8px;display:flex}.question-nav button.active{background:var(--primary-color);color:#fff}.question-nav button.accepted{background:var(--success);color:#fff;border-color:var(--success)}.question-nav button.partial{background:var(--warning);color:#fff;border-color:var(--warning)}.question-nav button.rejected{background:var(--destructive);color:#fff;border-color:var(--destructive)}.timer{color:var(--diff-hard);font-size:18px;font-weight:800}.modal-overlay{z-index:9999;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-lg);flex-direction:column;width:90%;max-width:600px;max-height:90vh;animation:.2s ease-out modal-fade-in;display:flex;box-shadow:0 25px 50px -12px #00000080}@keyframes modal-fade-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.modal-header h2{margin:0;font-size:1.25rem;font-weight:600}.modal-body{flex:1;padding:24px;overflow-y:auto}.modal-footer{border-top:1px solid var(--border-color);justify-content:flex-end;gap:12px;padding:16px 24px;display:flex}.ai-stat-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;display:grid}.ai-stat-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:center;padding:12px}.ai-stat-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.8rem}.ai-stat-value{color:var(--primary-color);font-size:1.1rem;font-weight:600}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}