@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--bg: #f0f4f8;--surface: #ffffff;--primary: #1a3a6e;--primary-light: #2352a0;--accent: #e8a020;--success: #22aa66;--danger: #e04040;--warning: #e8a020;--purple: #6940c4;--cyan: #0891b2;--text: #1a1a1a;--muted: #888;--border: #dde3ea;--light-bg: #f7f9fc}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,Segoe UI,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}button,input,select{font:inherit}button{cursor:pointer}.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1a3a6e,#2352a0,#1a3a6e);background-size:200% 200%;animation:gradientShift 8s ease infinite}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.login-card{background:#fff;border-radius:16px;padding:40px 36px;width:460px;max-width:95vw;text-align:center;box-shadow:0 20px 60px #0000004d;animation:slideUp .5s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-logo{background:var(--primary);color:#fff;font-weight:700;font-size:16px;padding:8px 20px;border-radius:6px;display:inline-block;margin-bottom:8px;letter-spacing:1px}.login-exam{font-size:12px;color:#666;margin-bottom:20px;line-height:1.6;border-bottom:1px solid #eee;padding-bottom:16px}.login-title{font-size:18px;font-weight:700;color:var(--text);margin-bottom:4px}.login-sub{font-size:13px;color:var(--muted);margin-bottom:22px}.field{margin-bottom:16px;text-align:left}.field label{font-size:12px;color:#555;display:block;margin-bottom:5px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.field input,.field select{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;color:var(--text);outline:none;transition:border .15s,box-shadow .15s;background:#fff}.field input:focus,.field select:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px #2352a01a}.pw-wrap{position:relative}.pw-wrap input{padding-right:42px}.pw-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);cursor:pointer;background:none;border:none;font-size:16px;color:#aaa}.lang-selector,.diff-selector{display:flex;gap:8px;margin-bottom:0}.lang-btn,.diff-btn{flex:1;padding:10px;border:2px solid var(--border);border-radius:8px;background:#fff;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.lang-btn.active{background:var(--primary-light);border-color:var(--primary-light);color:#fff}.lang-btn:hover:not(.active){background:#f0f6ff}.diff-btn.active.easy{background:var(--success);border-color:var(--success);color:#fff}.diff-btn.active.medium{background:var(--warning);border-color:var(--warning);color:#fff}.diff-btn.active.hard{background:var(--danger);border-color:var(--danger);color:#fff}.diff-btn:hover:not(.active){background:#f0f6ff}.login-btn{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:700;cursor:pointer;margin-top:4px;transition:background .15s;letter-spacing:.5px}.login-btn:hover{background:var(--primary-light)}.login-btn:disabled{opacity:.5;cursor:not-allowed}.login-error{font-size:12px;color:#c0392b;margin-top:10px;min-height:16px;font-weight:500}.hint-box{font-size:11px;color:var(--muted);margin-top:16px;background:var(--light-bg);padding:10px 14px;border-radius:8px;text-align:left;line-height:1.9;border:1px solid #e8edf3}.hint-box code{background:#e8edf3;padding:1px 5px;border-radius:3px;font-size:11px;color:#333}.exam-wrap{display:flex;flex-direction:column;min-height:100vh;background:var(--bg)}.top-bar{background:var(--primary);color:#fff;padding:8px 20px;display:flex;align-items:center;gap:12px;box-shadow:0 2px 10px #0003}.top-bar-left{display:flex;align-items:center;gap:12px;flex:1}.logo-sm{background:var(--accent);color:#fff;font-weight:700;font-size:12px;padding:4px 12px;border-radius:4px;letter-spacing:.5px}.exam-nm{color:#fff;font-size:13px;font-weight:500}.top-bar-right{display:flex;align-items:center;gap:8px}.timer-box{background:#ffffff26;border-radius:6px;padding:5px 12px;font-size:14px;color:#ffd166;font-weight:700;min-width:90px;text-align:center}.ubadge{background:#ffffff2e;border-radius:4px;padding:4px 12px;font-size:12px;color:#fff;font-weight:500}.tbtn{padding:6px 14px;border-radius:6px;font-size:12px;cursor:pointer;border:1.5px solid;transition:all .15s;font-weight:600}.tbtn-sub{background:#c0392b;border-color:#c0392b;color:#fff}.tbtn-sub:hover{background:#96281b}.tbtn-pause{background:transparent;border-color:#fff6;color:#fff}.tbtn-pause:hover{background:#ffffff1a}.sec-bar{background:var(--primary-light);padding:6px 16px;display:flex;gap:5px;flex-wrap:wrap;border-bottom:2px solid var(--primary)}.sec-btn{padding:5px 14px;border-radius:4px;font-size:12px;cursor:pointer;border:none;color:#fffc;background:transparent;transition:all .15s;font-weight:500}.sec-btn:hover:not(.active){background:#fff3;color:#fff}.sec-btn.active{font-weight:700;color:#fff}.main-area{display:flex;flex:1;height:calc(100vh - 110px)}.q-panel{flex:1;padding:20px;background:#fff;border-right:1px solid #e8edf3;display:flex;flex-direction:column;overflow-y:auto}.marks-row{font-size:12px;color:var(--muted);margin-bottom:14px;padding:6px 12px;background:var(--light-bg);border-radius:6px;display:flex;gap:16px}.marks-row .pos{color:var(--success);font-weight:700}.marks-row .neg{color:var(--danger);font-weight:700}.q-num{font-size:12px;font-weight:700;color:var(--primary-light);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.q-text{font-size:14.5px;color:var(--text);line-height:1.75;margin-bottom:20px}.passage-box{background:#fffdf0;border:1px solid #f0d060;border-radius:8px;padding:14px;font-size:13px;line-height:1.8;color:#333;margin-bottom:16px;max-height:180px;overflow-y:auto}.opts{display:flex;flex-direction:column;gap:8px}.opt{display:flex;align-items:flex-start;gap:12px;padding:10px 14px;border:1.5px solid #e0e7ef;border-radius:8px;cursor:pointer;transition:all .15s;background:#fff}.opt:hover{background:#f0f6ff;border-color:#b0c4e0}.opt.selected{border-color:var(--primary-light);background:#eaf1fb}.opt-circle{width:20px;height:20px;border-radius:50%;border:2px solid #c0cdd8;flex-shrink:0;margin-top:1px;display:flex;align-items:center;justify-content:center;transition:all .15s}.opt.selected .opt-circle{background:var(--primary-light);border-color:var(--primary-light)}.opt.selected .opt-circle:after{content:"";width:8px;height:8px;background:#fff;border-radius:50%}.opt-lbl{font-size:13.5px;color:var(--text);line-height:1.5}.act-bar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:#fff;border-top:1px solid #e8edf3;box-shadow:0 -2px 8px #0000000d}.side{width:210px;background:var(--light-bg);padding:14px;overflow-y:auto;flex-shrink:0;border-left:1px solid #e8edf3}.legend{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}.leg{display:flex;align-items:center;gap:5px;font-size:11px;color:#666;width:calc(50% - 3px)}.ldot{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0;color:#fff}.prog-bar{height:5px;background:#e0e7ef;border-radius:3px;margin-bottom:6px;overflow:hidden}.prog-fill{height:100%;background:linear-gradient(90deg,#2a6,#27c77b);border-radius:3px;transition:width .3s}.stat-r{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:12px}.side-sec-title{font-size:10px;font-weight:700;color:var(--primary-light);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;margin-bottom:12px}.qdot{width:30px;height:30px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:10px;cursor:pointer;font-weight:700;color:#fff;transition:all .12s}.qdot:hover{transform:scale(1.1);box-shadow:0 2px 6px #0003}.qdot.cur{box-shadow:0 0 0 3px var(--primary),0 0 0 5px #1a3a6e4d}.btn{padding:8px 16px;border-radius:7px;font-size:12px;cursor:pointer;border:1.5px solid;transition:all .15s;font-weight:600}.btn-outline{background:transparent;border-color:#c0cdd8;color:#444}.btn-outline:hover{background:var(--bg)}.btn-primary{background:var(--primary-light);border-color:var(--primary-light);color:#fff}.btn-primary:hover{background:var(--primary)}.btn-warn{background:var(--warning);border-color:var(--warning);color:#fff}.btn-warn:hover{background:#c88010}.result-wrap{padding:24px;background:#fff;min-height:calc(100vh - 50px);overflow-y:auto}.r-head{text-align:center;margin-bottom:24px;padding-bottom:20px;border-bottom:2px solid #e8edf3}.r-score{font-size:42px;font-weight:800;color:var(--primary);line-height:1}.r-sub{font-size:14px;color:var(--muted);margin-top:8px}.r-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}.r-card{background:var(--light-bg);border-radius:10px;padding:14px;text-align:center;border:1px solid #e0e7ef}.r-num{font-size:26px;font-weight:800;margin-bottom:4px}.r-lbl{font-size:11px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}.r-table{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:20px}.r-table th{background:var(--bg);padding:9px 12px;text-align:left;font-weight:700;border:1px solid #e0e7ef;color:#555;font-size:11px;text-transform:uppercase;letter-spacing:.5px}.r-table td{padding:9px 12px;border:1px solid #e0e7ef;color:var(--text)}.bc{background:#eaf3de;color:#27500a;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:700}.bw{background:#fcebeb;color:#791f1f;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:700}.bs{background:#f5f5f0;color:#666;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:700}.rev-sec-head{font-size:13px;font-weight:700;color:#fff;padding:6px 14px;border-radius:6px;margin:16px 0 10px;display:inline-block}.rev-q{border:1.5px solid #e0e7ef;border-radius:10px;padding:12px;margin-bottom:10px;background:#fafbfc}.rev-q-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:10px}.rev-opts{display:flex;flex-wrap:wrap;gap:6px}.rev-opt{padding:5px 12px;border-radius:20px;font-size:12px;border:1px solid}.bottom-btns{display:flex;gap:10px;justify-content:center;margin-top:20px;padding-top:20px;border-top:1px solid #e8edf3}.loading{display:flex;align-items:center;justify-content:center;padding:40px}.spinner{border:4px solid #f3f3f3;border-top:4px solid var(--primary-light);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.main-area{flex-direction:column}.side{width:100%;height:auto;border-left:none;border-top:1px solid #e8edf3}.r-cards{grid-template-columns:repeat(2,1fr)}}