/* ========== RESET & BASE ========== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
:root{
  --bg:#0a0e1a;--bg2:#111827;--bg3:#1e293b;--card:#151c2f;
  --border:#2a3350;--text:#e2e8f0;--text2:#94a3b8;--text3:#64748b;
  --primary:#6366f1;--primary2:#818cf8;--primary-glow:rgba(99,102,241,.25);
  --green:#22c55e;--red:#ef4444;--yellow:#eab308;--orange:#f97316;
  --cyan:#06b6d4;--radius:12px;--radius-sm:8px;
}
html{font-size:15px;scroll-behavior:smooth;}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;}
.hidden{display:none!important;}
button{cursor:pointer;font-family:inherit;border:none;outline:none;}
/* ========== BUTTONS ========== */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:.875rem;transition:all .2s;}
.btn-primary{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;box-shadow:0 4px 15px var(--primary-glow);}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px var(--primary-glow);}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);}
.btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;}
.btn-danger:hover{transform:translateY(-1px);}
.btn-submit{width:100%;padding:14px;background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;border-radius:var(--radius-sm);font-weight:700;font-size:.95rem;margin-top:16px;transition:all .25s;}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(239,68,68,.3);}
.btn-review{color:var(--yellow)!important;border-color:var(--yellow)!important;}
.btn-review:hover{background:rgba(234,179,8,.1)!important;}

/* ========== LANDING PAGE ========== */
.landing-page{min-height:100vh;position:relative;overflow:hidden;}
.landing-bg-shapes{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden;}
.shape{position:absolute;border-radius:50%;filter:blur(120px);opacity:.12;}
.shape-1{width:500px;height:500px;background:#6366f1;top:-100px;right:-100px;}
.shape-2{width:400px;height:400px;background:#8b5cf6;bottom:10%;left:-80px;}
.shape-3{width:300px;height:300px;background:#06b6d4;bottom:-50px;right:30%;}
.landing-header{position:relative;z-index:1;padding:24px 40px;display:flex;align-items:center;}
.logo-group{display:flex;align-items:center;gap:14px;}
.logo-icon svg{width:44px;height:44px;}
.logo-title{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,#c7d2fe,#e0e7ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.logo-sub{font-size:.75rem;color:var(--text3);font-weight:500;}
.landing-main{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:40px 40px 60px;}
.hero-section{text-align:center;margin-bottom:60px;}
.hero-badge{display:inline-block;background:rgba(99,102,241,.15);color:var(--primary2);padding:8px 20px;border-radius:50px;font-size:.8rem;font-weight:600;margin-bottom:20px;border:1px solid rgba(99,102,241,.2);}
.hero-title{font-size:2.8rem;font-weight:900;line-height:1.15;margin-bottom:16px;}
.gradient-text{background:linear-gradient(135deg,#6366f1,#8b5cf6,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.hero-desc{color:var(--text2);font-size:1.05rem;max-width:600px;margin:0 auto 32px;line-height:1.7;}
.hero-stats{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 28px;text-align:center;min-width:120px;}
.stat-num{display:block;font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#22c55e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.stat-label{font-size:.75rem;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:1px;}
.sets-heading,.syllabus-heading{font-size:1.4rem;font-weight:700;margin-bottom:24px;text-align:center;}
/* Topic Cards */
.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-bottom:40px;}
.topic-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;cursor:pointer;transition:all .3s;position:relative;overflow:hidden;border-left:4px solid var(--tc);}
.topic-card:hover{transform:translateY(-4px);border-color:var(--tc);box-shadow:0 8px 30px rgba(0,0,0,.3);}
.tc-icon{font-size:2.2rem;margin-bottom:12px;}
.tc-name{font-size:1.05rem;font-weight:700;margin-bottom:6px;color:var(--text);}
.tc-desc{font-size:.78rem;color:var(--text3);line-height:1.5;margin-bottom:14px;}
.tc-stats{display:flex;gap:16px;}
.tc-stat{font-size:.75rem;color:var(--text2);}
.tc-stat strong{color:var(--tc);font-weight:800;}
.tc-badge{position:absolute;top:12px;right:12px;font-size:.6rem;padding:3px 10px;border-radius:20px;font-weight:700;background:rgba(34,197,94,.15);color:#22c55e;}
.tc-badge.coming{background:rgba(100,116,139,.15);color:#94a3b8;}
.sets-topic-header{display:flex;align-items:center;gap:12px;justify-content:center;margin-bottom:24px;}
.sets-topic-icon{font-size:1.8rem;}
.btn-back-topics{margin-bottom:20px;}
.sidebar-topic-label{padding:10px 16px;font-size:.72rem;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:1px;border-bottom:1px solid var(--border);margin-bottom:8px;}
.sets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:60px;}
.set-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center;cursor:pointer;transition:all .3s;position:relative;overflow:hidden;}
.set-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#6366f1,#8b5cf6);opacity:0;transition:opacity .3s;}
.set-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:0 8px 30px var(--primary-glow);}
.set-card:hover::before{opacity:1;}
.set-card.disabled{opacity:.4;cursor:not-allowed;pointer-events:none;}
.set-card .set-num{font-size:2rem;font-weight:900;background:linear-gradient(135deg,#6366f1,#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.set-card .set-label{display:block;font-size:.85rem;color:var(--text2);margin-top:4px;font-weight:500;}
.set-card .set-qs{font-size:.7rem;color:var(--text3);margin-top:8px;}
.set-card .set-category{display:inline-block;margin-top:10px;padding:5px 14px;border-radius:20px;font-size:.72rem;font-weight:700;background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(139,92,246,.15));color:var(--primary2);border:1px solid rgba(99,102,241,.2);}
.set-card .set-badge{position:absolute;top:10px;right:10px;font-size:.6rem;padding:3px 8px;border-radius:20px;font-weight:700;}
.set-badge.available{background:rgba(34,197,94,.15);color:#22c55e;}
.set-badge.coming{background:rgba(100,116,139,.15);color:#94a3b8;}
/* Attempted set cards */
.set-card.attempted{border-color:rgba(34,197,94,.3);}
.set-card.attempted::before{opacity:1;background:linear-gradient(90deg,#22c55e,#10b981);}
.set-attempts-header{margin-top:10px;font-size:.68rem;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:.5px;text-align:center;}
.set-attempts-list{margin-top:6px;max-height:120px;overflow-y:auto;display:flex;flex-direction:column;gap:4px;scrollbar-width:thin;}
.set-attempts-list::-webkit-scrollbar{width:3px;}
.set-attempts-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px;}
.attempt-row{display:flex;align-items:center;gap:6px;padding:5px 8px;border-radius:6px;font-size:.68rem;cursor:pointer;transition:all .2s;border:1px solid transparent;}
.attempt-row:hover{transform:translateX(2px);border-color:var(--primary);background:rgba(99,102,241,.08);}
.attempt-row.good{background:rgba(34,197,94,.06);}
.attempt-row.avg{background:rgba(234,179,8,.06);}
.attempt-row.poor{background:rgba(239,68,68,.06);}
.ar-num{font-weight:700;color:var(--text3);min-width:20px;}
.ar-score{font-weight:800;flex:1;}
.attempt-row.good .ar-score{color:#22c55e;}
.attempt-row.avg .ar-score{color:#eab308;}
.attempt-row.poor .ar-score{color:#ef4444;}
.ar-pct{font-weight:600;color:var(--text2);min-width:30px;text-align:right;}
.ar-time{color:var(--text3);font-size:.62rem;min-width:40px;text-align:right;}
.ar-best{color:#eab308;font-size:.75rem;margin-left:2px;}
.attempt-row.best{border-color:rgba(234,179,8,.3);background:rgba(234,179,8,.08);}
.tc-attempted strong{color:#22c55e!important;}

/* Quick Mix Card (Set 100) */
.quick-mix-card{border:1px solid rgba(6,182,212,.3)!important;background:linear-gradient(135deg,rgba(6,182,212,.06),rgba(99,102,241,.06))!important;}
.quick-mix-card::before{opacity:1!important;background:linear-gradient(90deg,#06b6d4,#6366f1,#8b5cf6)!important;height:3px!important;}
.quick-mix-card:hover{border-color:rgba(6,182,212,.6)!important;box-shadow:0 8px 30px rgba(6,182,212,.2)!important;}
.quick-mix-card .set-num{font-size:2.2rem;-webkit-text-fill-color:unset;background:none;color:var(--text);}
.quick-mix-badge{background:linear-gradient(135deg,rgba(6,182,212,.2),rgba(99,102,241,.2))!important;color:#06b6d4!important;border:1px solid rgba(6,182,212,.3);}
.sidebar-separator{height:1px;background:var(--border);margin:10px 0;}
.quick-mix-sidebar{border:1px solid rgba(6,182,212,.2)!important;}
.quick-mix-sidebar:hover{background:rgba(6,182,212,.1)!important;border-color:rgba(6,182,212,.4)!important;}
.quick-mix-sidebar.active{background:linear-gradient(135deg,rgba(6,182,212,.2),rgba(99,102,241,.15))!important;color:#06b6d4!important;border-color:rgba(6,182,212,.4)!important;}

.syllabus-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;}
.syllabus-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .3s;}
.syllabus-card:hover{border-color:var(--primary);transform:translateY(-2px);}
.syllabus-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(99,102,241,.1);color:var(--accent);margin-bottom:14px;}
.syllabus-card h4{font-size:1rem;margin-bottom:6px;}
.syllabus-card p{font-size:.8rem;color:var(--text3);line-height:1.5;}
.landing-footer{position:relative;z-index:1;text-align:center;padding:24px;color:var(--text3);font-size:.75rem;border-top:1px solid var(--border);}

/* ========== EXAM PAGE LAYOUT ========== */
.exam-page{display:flex;height:100vh;overflow:hidden;}
/* Sidebar */
.sidebar{width:240px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;transition:transform .3s;z-index:20;}
.sidebar.collapsed{transform:translateX(-100%);}
.sidebar-header{padding:16px 20px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border);}
.sidebar-header svg{width:32px;height:32px;}
.sidebar-title{font-weight:700;font-size:.9rem;}
.sidebar-nav{flex:1;overflow-y:auto;padding:12px;}
.sidebar-nav button{width:100%;display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--radius-sm);background:transparent;color:var(--text2);font-size:.85rem;font-weight:500;transition:all .2s;margin-bottom:4px;}
.sidebar-nav button:hover{background:rgba(99,102,241,.1);color:var(--text);}
.sidebar-nav button.active{background:linear-gradient(135deg,rgba(99,102,241,.2),rgba(139,92,246,.15));color:var(--primary2);font-weight:700;border:1px solid rgba(99,102,241,.3);}
.sidebar-nav button .set-indicator{width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.75rem;background:var(--bg3);color:var(--text3);}
.sidebar-nav button.active .set-indicator{background:var(--primary);color:#fff;}
.sidebar-footer{padding:12px;border-top:1px solid var(--border);}
.btn-back-home{width:100%;display:flex;align-items:center;gap:8px;justify-content:center;padding:10px;border-radius:var(--radius-sm);background:rgba(239,68,68,.1);color:#f87171;font-size:.82rem;font-weight:600;transition:all .2s;}
.btn-back-home:hover{background:rgba(239,68,68,.2);}
/* Exam Content */
.exam-content{flex:1;display:flex;flex-direction:column;overflow:hidden;}
.exam-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:var(--bg2);border-bottom:1px solid var(--border);flex-shrink:0;gap:12px;}
.exam-header-left{display:flex;align-items:center;gap:12px;}
.sidebar-toggle{background:var(--bg3);color:var(--text2);padding:8px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all .2s;}
.sidebar-toggle:hover{color:var(--primary);}
.exam-title{font-size:1.05rem;font-weight:700;white-space:nowrap;}
.exam-header-center{flex:1;display:flex;justify-content:center;}
.subject-tabs{display:flex;gap:4px;background:var(--bg);padding:4px;border-radius:var(--radius-sm);}
.subject-tab{padding:8px 14px;border-radius:6px;background:transparent;color:var(--text3);font-size:.75rem;font-weight:600;transition:all .2s;}
.subject-tab:hover{color:var(--text2);}
.subject-tab.active{background:var(--primary);color:#fff;}
.timer-box{display:flex;align-items:center;gap:8px;background:var(--bg);padding:8px 16px;border-radius:var(--radius-sm);font-size:1rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--cyan);border:1px solid rgba(6,182,212,.2);}
.timer-box.warning{color:var(--yellow);border-color:rgba(234,179,8,.3);animation:pulse 1s infinite;}
.timer-box.danger{color:var(--red);border-color:rgba(239,68,68,.3);animation:pulse .5s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.6;}}

/* Exam Body */
.exam-body{flex:1;display:flex;overflow:hidden;}
.question-panel{flex:1;padding:28px 36px;overflow-y:auto;}
.question-meta{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap;}
.q-number{font-weight:800;font-size:1.05rem;color:var(--primary2);}
.q-topic{background:rgba(99,102,241,.12);color:var(--primary2);padding:4px 12px;border-radius:20px;font-size:.72rem;font-weight:600;}
.q-marks{margin-left:auto;font-size:.75rem;color:var(--text3);background:var(--bg3);padding:4px 10px;border-radius:20px;}
.question-text{font-size:1.05rem;line-height:1.75;margin-bottom:28px;color:var(--text);font-weight:500;}
.options-list{display:flex;flex-direction:column;gap:12px;margin-bottom:32px;}
.option-item{display:flex;align-items:flex-start;gap:14px;padding:16px 20px;background:var(--card);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all .25s;position:relative;}
.option-item:hover{border-color:var(--primary);background:rgba(99,102,241,.05);}
.option-item.selected{border-color:var(--primary);background:rgba(99,102,241,.1);box-shadow:0 0 0 3px var(--primary-glow);}
.option-letter{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem;background:var(--bg3);color:var(--text3);flex-shrink:0;transition:all .25s;}
.option-item.selected .option-letter{background:var(--primary);color:#fff;}
.option-text{padding-top:5px;font-size:.95rem;line-height:1.5;}
/* Review mode styles */
.option-item.correct-answer{border-color:var(--green)!important;background:rgba(34,197,94,.08)!important;}
.option-item.correct-answer .option-letter{background:var(--green);color:#fff;}
.option-item.wrong-answer{border-color:var(--red)!important;background:rgba(239,68,68,.08)!important;}
.option-item.wrong-answer .option-letter{background:var(--red);color:#fff;}
.question-actions{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;padding-top:20px;border-top:1px solid var(--border);}
.actions-left{display:flex;gap:10px;flex-wrap:wrap;}

/* ========== PALETTE PANEL ========== */
.palette-panel{width:280px;background:var(--bg2);border-left:1px solid var(--border);padding:20px;display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto;}
.palette-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.palette-header h3{font-size:.95rem;font-weight:700;}
.palette-toggle-btn{background:var(--bg3);color:var(--text2);padding:6px;border-radius:6px;display:none;}
.palette-legend{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px;}
.legend-item{display:flex;align-items:center;gap:5px;font-size:.68rem;color:var(--text3);font-weight:500;}
.legend-dot{width:14px;height:14px;border-radius:4px;}
.dot-answered{background:var(--green);}
.dot-skipped{background:var(--red);}
.dot-review{background:var(--yellow);}
.dot-default{background:var(--bg3);border:1px solid var(--border);}
.palette-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-bottom:auto;overflow-y:auto;max-height:calc(100vh - 340px);}
.palette-btn{width:100%;aspect-ratio:1;border-radius:6px;font-size:.75rem;font-weight:700;background:var(--bg3);color:var(--text3);border:1px solid var(--border);transition:all .2s;position:relative;}
.palette-btn:hover{border-color:var(--primary);color:var(--text);}
.palette-btn.current{box-shadow:0 0 0 2px var(--primary);border-color:var(--primary);color:var(--primary2);}
.palette-btn.answered{background:var(--green);color:#fff;border-color:var(--green);}
.palette-btn.skipped{background:var(--red);color:#fff;border-color:var(--red);}
.palette-btn.review{background:var(--yellow);color:#000;border-color:var(--yellow);}

/* ========== MODAL ========== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:100;}
.modal-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;max-width:440px;width:90%;text-align:center;}
.modal-icon{margin-bottom:16px;}
.modal-card h3{font-size:1.3rem;margin-bottom:16px;}
.modal-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px;}
.modal-stat{background:var(--bg3);padding:12px;border-radius:var(--radius-sm);}
.modal-stat span:first-child{display:block;font-size:1.4rem;font-weight:800;}
.modal-stat span:last-child{font-size:.7rem;color:var(--text3);}
.modal-warn{color:var(--text3);font-size:.82rem;margin-bottom:20px;}
.modal-actions{display:flex;gap:12px;justify-content:center;}

/* ========== RESULT PAGE ========== */
.result-page{min-height:100vh;padding:40px;overflow-y:auto;}
.result-container{max-width:800px;margin:0 auto;}
.result-header{text-align:center;margin-bottom:36px;}
.result-title{font-size:2rem;font-weight:900;background:linear-gradient(135deg,#6366f1,#22c55e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.result-set-name{color:var(--text3);margin-top:6px;}
.result-score-card{display:flex;justify-content:center;margin-bottom:36px;}
.score-circle{position:relative;width:160px;height:160px;}
.score-circle svg{width:100%;height:100%;transform:rotate(-90deg);}
.score-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.score-value{font-size:2.2rem;font-weight:900;color:var(--text);}
.score-total{font-size:.85rem;color:var(--text3);}
.result-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:36px;}
.result-stat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;}
.result-stat .rs-value{display:block;font-size:1.6rem;font-weight:800;}
.result-stat .rs-label{font-size:.72rem;color:var(--text3);text-transform:uppercase;letter-spacing:.5px;font-weight:600;}
.result-stat.correct .rs-value{color:var(--green);}
.result-stat.wrong .rs-value{color:var(--red);}
.result-stat.unattempted .rs-value{color:var(--yellow);}
.result-stat.negative .rs-value{color:var(--orange);}
.result-topicwise{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:28px;}
.result-topicwise h3{font-size:1.05rem;font-weight:700;margin-bottom:20px;}
.topic-bar-item{margin-bottom:18px;}
.topic-bar-item:last-child{margin-bottom:0;}
.topic-bar-header{display:flex;justify-content:space-between;margin-bottom:6px;font-size:.82rem;}
.topic-bar-name{font-weight:600;}
.topic-bar-pct{color:var(--primary2);font-weight:700;}
.topic-bar-track{height:10px;background:var(--bg3);border-radius:20px;overflow:hidden;}
.topic-bar-fill{height:100%;border-radius:20px;transition:width 1s ease;background:linear-gradient(90deg,#6366f1,#8b5cf6);}
.topic-bar-detail{display:flex;gap:16px;margin-top:4px;font-size:.7rem;color:var(--text3);}
.result-actions{display:flex;gap:16px;justify-content:center;}

/* ========== REVIEW PAGE ========== */
.review-page{min-height:100vh;padding:24px 40px;overflow-y:auto;}
.review-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.review-header h2{font-size:1.4rem;font-weight:800;}
.review-filters{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap;}
.review-filter{padding:8px 16px;border-radius:20px;background:var(--card);color:var(--text2);font-size:.8rem;font-weight:600;border:1px solid var(--border);transition:all .2s;}
.review-filter:hover{border-color:var(--primary);}
.review-filter.active{background:var(--primary);color:#fff;border-color:var(--primary);}
.review-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:16px;}
.review-item.review-unattempted{border-color:rgba(234,179,8,.4);background:rgba(234,179,8,.06);border-left:4px solid var(--yellow);}
.review-item.review-correct{border-color:rgba(34,197,94,.3);background:rgba(34,197,94,.04);border-left:4px solid var(--green);}
.review-item.review-wrong{border-color:rgba(239,68,68,.3);background:rgba(239,68,68,.04);border-left:4px solid var(--red);}
.review-item-header{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap;}
.review-q-num{font-weight:800;color:var(--primary2);}
.review-q-topic{font-size:.72rem;background:rgba(99,102,241,.12);color:var(--primary2);padding:3px 10px;border-radius:20px;font-weight:600;}
.review-q-status{margin-left:auto;font-size:.72rem;padding:3px 10px;border-radius:20px;font-weight:700;}
.review-q-status.correct{background:rgba(34,197,94,.15);color:var(--green);}
.review-q-status.wrong{background:rgba(239,68,68,.15);color:var(--red);}
.review-q-status.unattempted{background:rgba(234,179,8,.15);color:var(--yellow);}
.review-q-text{font-size:.95rem;line-height:1.6;margin-bottom:14px;}

/* ========== LOGIN PAGE ========== */
.login-page{min-height:100vh;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--bg);}
.login-page .landing-bg-shapes{position:absolute;inset:0;z-index:0;pointer-events:none;}
.login-container{position:relative;z-index:2;width:100%;max-width:420px;padding:20px;margin:0 auto;}
.login-card{background:rgba(21,28,47,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(99,102,241,.2);border-radius:20px;padding:48px 36px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.4),0 0 80px rgba(99,102,241,.08);}
.login-logo{margin-bottom:20px;display:flex;justify-content:center;}
.login-logo svg{width:64px;height:64px;max-width:64px;max-height:64px;display:block;filter:drop-shadow(0 4px 15px rgba(99,102,241,.4));}
.login-title{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,#c7d2fe,#e0e7ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:4px;}
.login-subtitle{color:var(--text3);font-size:.82rem;margin-bottom:32px;}
.login-form{display:flex;flex-direction:column;gap:12px;margin-bottom:20px;}
.login-label{text-align:left;font-size:.78rem;font-weight:600;color:var(--text2);margin-bottom:-4px;}
.login-input{width:100%;padding:14px 18px;background:var(--bg);border:2px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:1rem;font-family:inherit;outline:none;transition:all .3s;}
.login-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-glow);}
.login-input::placeholder{color:var(--text3);}
.login-btn{width:100%;padding:14px;font-size:1rem;justify-content:center;}
.login-hint{font-size:.72rem;color:var(--text3);opacity:.7;margin-top:4px;}

/* ========== HEADER USER ========== */
.landing-header{justify-content:space-between;}
.header-user{display:flex;align-items:center;gap:12px;}
.user-greeting{font-size:.88rem;font-weight:600;color:var(--text2);}
.btn-logout{padding:6px 14px;font-size:.75rem;}

/* ========== PERFORMANCE DASHBOARD ========== */
.perf-dashboard{margin-bottom:40px;}
.perf-welcome{text-align:center;margin-bottom:28px;}
.perf-welcome h2{font-size:1.5rem;font-weight:800;color:var(--text);}
.perf-welcome span{background:linear-gradient(135deg,#6366f1,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.perf-welcome p{color:var(--text3);font-size:.88rem;margin-top:4px;}
.perf-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .3s;}
.perf-card:hover{border-color:rgba(99,102,241,.3);box-shadow:0 4px 20px rgba(0,0,0,.2);}
.perf-card-title{font-size:.95rem;font-weight:700;margin-bottom:18px;color:var(--text);}
.perf-card-title .trend-sub{font-weight:400;font-size:.72rem;color:var(--text3);}

/* Top Row: Readiness + Stats */
.perf-top-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px;}
.readiness-gauge{position:relative;width:180px;height:180px;margin:0 auto 12px;}
.readiness-svg{width:100%;height:100%;transform:rotate(-90deg);}
.readiness-arc{transition:stroke-dashoffset 1.5s cubic-bezier(.4,0,.2,1),stroke .3s;}
.readiness-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.readiness-pct{font-size:2.2rem;font-weight:900;color:var(--text);}
.readiness-label{font-size:.75rem;font-weight:600;color:var(--text2);margin-top:2px;}
.readiness-target{text-align:center;font-size:.8rem;font-weight:600;color:var(--text3);}

/* Quick Stats */
.perf-stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.perf-stat{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 12px;text-align:center;transition:all .3s;}
.perf-stat:hover{border-color:var(--primary);transform:translateY(-2px);}
.ps-icon{font-size:1.6rem;display:block;margin-bottom:6px;}
.ps-value{display:block;font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,#6366f1,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.ps-label{display:block;font-size:.68rem;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-top:2px;}

/* Topic Strength Bars */
.perf-topics{margin-bottom:20px;}
.ptb-item{margin-bottom:18px;}
.ptb-item:last-child{margin-bottom:0;}
.ptb-header{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.ptb-name{font-size:.85rem;font-weight:600;flex:1;}
.ptb-pct{font-size:.88rem;font-weight:800;}
.ptb-badge{font-size:.65rem;padding:2px 10px;border-radius:20px;font-weight:700;}
.ptb-strong{background:rgba(34,197,94,.15);color:#22c55e;}
.ptb-moderate{background:rgba(234,179,8,.15);color:#eab308;}
.ptb-weak{background:rgba(239,68,68,.15);color:#ef4444;}
.ptb-track{height:10px;background:var(--bg3);border-radius:20px;overflow:visible;position:relative;}
.ptb-fill{height:100%;border-radius:20px;transition:width 1.2s cubic-bezier(.4,0,.2,1);}
.ptb-target-line{position:absolute;top:-3px;bottom:-3px;width:2px;background:var(--text3);border-radius:2px;opacity:.5;}
.ptb-detail{display:flex;gap:16px;margin-top:5px;font-size:.7rem;color:var(--text3);}

/* Score Trend Chart */
.perf-bottom-row{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;}
.trend-chart{min-height:160px;display:flex;align-items:center;justify-content:center;}
.trend-svg{width:100%;height:auto;}
.trend-empty{color:var(--text3);font-size:.85rem;text-align:center;padding:40px 0;}

/* Weak Topics */
.weak-list{display:flex;flex-direction:column;gap:14px;}
.weak-item{background:var(--bg);border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-sm);padding:14px;}
.weak-item-header{display:flex;align-items:center;gap:8px;margin-bottom:8px;}
.weak-icon{font-size:1.2rem;}
.weak-name{flex:1;font-size:.82rem;font-weight:600;}
.weak-gap{font-size:.72rem;font-weight:700;color:var(--red);background:rgba(239,68,68,.1);padding:2px 10px;border-radius:20px;}
.weak-bar{height:6px;background:var(--bg3);border-radius:10px;overflow:hidden;}
.weak-bar-fill{height:100%;background:linear-gradient(90deg,#ef4444,#f97316);border-radius:10px;transition:width 1s ease;}
.weak-tip{font-size:.7rem;color:var(--text3);margin-top:6px;}
.weak-none{text-align:center;padding:20px 10px;}
.weak-none-icon{font-size:2.5rem;display:block;margin-bottom:8px;}
.weak-none p{font-size:.88rem;font-weight:600;color:var(--green);}
.weak-none-sub{font-size:.75rem;color:var(--text3);font-weight:400!important;margin-top:2px;}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:10px;}
::-webkit-scrollbar-thumb:hover{background:var(--border);}

/* ========== SIDEBAR CLOSE BUTTON ========== */
.sidebar-close-btn{display:none;margin-left:auto;background:rgba(239,68,68,.15);color:#f87171;padding:6px;border-radius:8px;transition:all .2s;}
.sidebar-close-btn:hover{background:rgba(239,68,68,.3);}

/* ========== MOBILE BOTTOM BAR ========== */
.mobile-bottom-bar{display:none;}

/* ========== RESPONSIVE ========== */
@media(max-width:900px){
  /* Sidebar as overlay */
  .sidebar{position:fixed;top:0;left:0;height:100%;z-index:50;transform:translateX(-100%);}
  .sidebar.open{transform:translateX(0);}
  .sidebar-close-btn{display:flex!important;align-items:center;justify-content:center;}
  .sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:49;display:none;}
  .sidebar-overlay.active{display:block;}

  /* Palette panel as overlay */
  .palette-panel{position:fixed;top:0;right:0;height:100%;z-index:40;transform:translateX(100%);width:260px;}
  .palette-panel.open{transform:translateX(0);}
  .palette-toggle-btn{display:flex!important;}

  /* Timer responsive */
  .timer-box{font-size:.82rem;padding:6px 10px;gap:5px;}
  .timer-box svg{width:14px;height:14px;}

  /* Exam header adjustments */
  .exam-header{padding:10px 12px;gap:8px;}
  .exam-title{font-size:.82rem;overflow:hidden;text-overflow:ellipsis;max-width:120px;}
  .exam-header-center{display:none;}

  /* Question panel */
  .question-panel{padding:16px 14px 100px;}
  .question-text{font-size:.95rem;}
  .option-item{padding:12px 14px;gap:10px;}
  .option-letter{width:28px;height:28px;font-size:.72rem;}
  .option-text{font-size:.85rem;padding-top:3px;}
  .question-actions{flex-direction:column;gap:8px;}
  .actions-left{flex-wrap:wrap;width:100%;}
  .actions-left .btn{flex:1;min-width:0;justify-content:center;font-size:.78rem;padding:8px 10px;}
  .actions-right{width:100%;}
  .actions-right .btn{width:100%;justify-content:center;}

  /* Mobile Bottom Bar */
  .mobile-bottom-bar{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:30;background:var(--bg2);border-top:1px solid var(--border);padding:8px 12px;gap:10px;box-shadow:0 -4px 20px rgba(0,0,0,.4);}
  .mbb-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:12px 16px;border-radius:var(--radius-sm);font-weight:700;font-size:.82rem;transition:all .2s;}
  .mbb-palette{background:var(--bg3);color:var(--text2);border:1px solid var(--border);}
  .mbb-palette:hover{border-color:var(--primary);color:var(--primary);}
  .mbb-submit{background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;box-shadow:0 4px 15px rgba(239,68,68,.3);}
  .mbb-submit:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(239,68,68,.4);}

  /* Results page */
  .result-stats-grid{grid-template-columns:repeat(2,1fr);}
  .result-page{padding:20px 14px;}

  /* Landing page */
  .hero-title{font-size:1.8rem;}
  .landing-main{padding:20px;}
  .landing-header{padding:16px 20px;flex-wrap:wrap;gap:12px;}
  .topics-grid{grid-template-columns:1fr;}
  .sets-grid{grid-template-columns:repeat(2,1fr);}

  /* Performance Dashboard responsive */
  .perf-top-row{grid-template-columns:1fr;}
  .perf-bottom-row{grid-template-columns:1fr;}
  .perf-welcome h2{font-size:1.2rem;}
  .header-user{gap:8px;}
  .user-greeting{font-size:.78rem;}

  /* Review page */
  .review-page{padding:16px 14px;}
  .review-header h2{font-size:1.1rem;}
  .review-filters{gap:6px;}
  .review-filter{font-size:.72rem;padding:6px 12px;}
}

@media(max-width:480px){
  .exam-title{max-width:90px;font-size:.75rem;}
  .timer-box{font-size:.75rem;padding:5px 8px;}
  .sets-grid{grid-template-columns:1fr 1fr;}
  .stat-card{min-width:90px;padding:14px 16px;}
  .stat-num{font-size:1.4rem;}
  .hero-title{font-size:1.5rem;}
  .hero-desc{font-size:.9rem;}
  .q-number{font-size:.9rem;}
  .q-topic{font-size:.65rem;}
  .login-card{padding:32px 24px;}
  .perf-stats-grid{grid-template-columns:1fr 1fr;}
  .readiness-gauge{width:150px;height:150px;}
  .readiness-pct{font-size:1.8rem;}
}