.exam-mode-card{background:var(--color-glass-card-bg,rgba(255,255,255,0.7));backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--color-glass-card-border,rgba(255,255,255,0.3));border-radius:1.5rem;padding:3rem 2.5rem;text-align:center;margin-bottom:3rem;position:relative;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,0.06)}.exam-mode-card::before{content:'';position:absolute;top:-60%;right:-30%;width:400px;height:400px;background:radial-gradient(circle,rgba(20,184,166,0.12) 0%,transparent 70%);border-radius:50%;pointer-events:none}.exam-mode-card::after{content:'';position:absolute;bottom:-40%;left:-20%;width:300px;height:300px;background:radial-gradient(circle,rgba(99,102,241,0.08) 0%,transparent 70%);border-radius:50%;pointer-events:none}.exam-mode-card__icon{margin-bottom:1rem;display:flex;justify-content:center;align-items:center}.exam-mode-card__title{font-size:1.8rem;font-weight:800;margin-bottom:0.5rem;color:var(--color-navy,#0f172a);letter-spacing:-0.02em}.exam-mode-card__desc{color:#64748b;font-size:0.95rem;max-width:480px;margin:0 auto 1.75rem;line-height:1.6}.exam-mode-card__subtitle{font-size:0.78rem;color:#94a3b8;margin:0.75rem auto 0;text-align:center;letter-spacing:0.02em}.exam-mode-btn{display:inline-flex;align-items:center;gap:0.6rem;background:linear-gradient(135deg,#14b8a6,#0d9488);color:#fff;border:none;padding:0.9rem 2.2rem;border-radius:0.75rem;font-size:1.05rem;font-weight:700;cursor:pointer;transition:all 0.25s;box-shadow:0 4px 20px rgba(20,184,166,0.35);font-family:inherit}.exam-mode-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(20,184,166,0.45)}.exam-mode-btn svg{width:18px;height:18px}.exam-hub-nav{display:flex;justify-content:center;gap:0.5rem;margin-bottom:2.5rem;position:sticky;top:5rem;z-index:50;padding:0.5rem;background:rgba(241,245,249,0.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:2.5rem;width:fit-content;margin-left:auto;margin-right:auto;border:1px solid rgba(15,23,42,0.06)}.exam-hub-tab{padding:0.65rem 1.5rem;border-radius:2rem;background:transparent;border:none;color:#64748b;font-weight:700;cursor:pointer;text-decoration:none;transition:all 0.2s;font-size:0.9rem}.exam-hub-tab:hover{color:var(--color-navy,#0f172a);background:rgba(255,255,255,0.6)}.exam-hub-tab.active{background:var(--color-navy,#0f172a);color:#fff;box-shadow:0 2px 10px rgba(15,23,42,0.2)}.exam-section-header{position:relative;padding-left:1rem;margin-bottom:2rem}.exam-section-header::before{content:'';position:absolute;left:0;top:0.25rem;bottom:0.25rem;width:4px;border-radius:2px}.exam-section-header--aqa::before{background:var(--color-blue,#3b82f6)}.exam-section-header--ib::before{background:var(--color-purple,#8b5cf6)}.exam-section-meta{display:inline-flex;align-items:center;gap:0.5rem;background:rgba(0,0,0,0.04);padding:0.25rem 0.75rem;border-radius:1rem;font-size:0.8rem;font-weight:600;color:#64748b;margin-top:0.5rem}.ib-sub-header{display:inline-block;background:rgba(139,92,246,0.1);color:#7c3aed;padding:0.25rem 0.85rem;border-radius:1rem;font-size:0.85rem;font-weight:700;margin:1.5rem 0 1rem;text-transform:uppercase;letter-spacing:0.05em}.exam-topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:0.75rem;margin-bottom:2.5rem}.exam-topic-card{padding:1rem 1.25rem;text-decoration:none;color:inherit;display:flex;align-items:center;gap:0.85rem;transition:all 0.2s;position:relative;overflow:hidden;background:#fff;border:1px solid rgba(15,23,42,0.08);border-radius:var(--radius-lg,1rem);box-shadow:0 2px 8px rgba(0,0,0,0.04)}.exam-topic-card:hover{border-color:var(--color-teal,#14b8a6);transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,0,0,0.08)}.exam-topic-card::after{content:'\2192';position:absolute;right:1rem;opacity:0;transform:translateX(-10px);transition:all 0.2s;color:var(--color-teal,#14b8a6);font-weight:bold}.exam-topic-card:hover::after{opacity:1;transform:translateX(0)}.exam-topic-card:hover .exam-topic-text{transform:translateX(-5px)}.exam-topic-text{transition:transform 0.2s;flex:1}.exam-topic-number{font-weight:800;color:var(--color-teal,#14b8a6);font-size:1.15rem;width:2.2rem;flex-shrink:0}.exam-topic-title{display:block;font-size:0.9rem;line-height:1.3}.exam-topic-title strong{color:var(--color-navy,#0f172a)}.exam-topic-count{font-size:0.75rem;color:#94a3b8;display:block;margin-top:0.25rem}.exam-back-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--color-navy,#0f172a);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(0,0,0,0.15);opacity:0;transform:translateY(10px);transition:all 0.3s;z-index:40}.exam-back-top.visible{opacity:1;transform:translateY(0)}.exam-back-top:hover{background:var(--color-teal,#14b8a6);transform:translateY(-2px)}[data-theme="dark"] .exam-mode-card{background:rgba(30,41,59,0.6);border-color:rgba(255,255,255,0.06);box-shadow:0 8px 32px rgba(0,0,0,0.3)}[data-theme="dark"] .exam-mode-card__title{color:#e2e8f0}[data-theme="dark"] .exam-mode-card__desc{color:#94a3b8}[data-theme="dark"] .exam-hub-nav{background:rgba(15,23,42,0.85);border-color:rgba(255,255,255,0.06)}[data-theme="dark"] .exam-hub-tab{color:#94a3b8}[data-theme="dark"] .exam-hub-tab:hover{color:#e2e8f0;background:rgba(255,255,255,0.05)}[data-theme="dark"] .exam-hub-tab.active{background:#38bdf8;color:#0f172a}[data-theme="dark"] .exam-section-meta{background:rgba(255,255,255,0.05);color:#94a3b8}[data-theme="dark"] .ib-sub-header{background:rgba(139,92,246,0.15);color:#a78bfa}[data-theme="dark"] .exam-topic-card{background:rgba(30,41,59,0.6);border-color:rgba(255,255,255,0.06)}[data-theme="dark"] .exam-topic-card:hover{border-color:rgba(45,212,191,0.5);background:rgba(30,41,59,0.8)}[data-theme="dark"] .exam-topic-title strong{color:#e2e8f0}.exam-mode-start{max-width:680px;margin:1.5rem auto;background:var(--color-glass-card-bg,rgba(255,255,255,0.85));backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--color-glass-card-border,rgba(255,255,255,0.3));border-radius:1rem;padding:1.25rem 1.5rem;box-shadow:0 4px 20px rgba(0,0,0,0.04)}.exam-mode-start__inner{display:flex;align-items:center;gap:1rem}.exam-mode-start__icon{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,rgba(20,184,166,0.12),rgba(13,148,136,0.08));display:flex;align-items:center;justify-content:center;color:#14b8a6;flex-shrink:0}.exam-mode-start__text{flex:1;display:flex;flex-direction:column;gap:0.15rem}.exam-mode-start__text strong{font-size:1.05rem;color:var(--color-navy,#0f172a)}.exam-mode-start__text span{font-size:0.82rem;color:var(--color-text-muted,#64748b)}.exam-mode-start__auth{display:inline-flex;align-items:center;gap:0.3rem;font-size:0.72rem;font-weight:600;color:#f59e0b;margin-top:0.15rem}.exam-mode-start__btn{display:inline-flex;align-items:center;gap:0.5rem;background:linear-gradient(135deg,#14b8a6,#0d9488);color:#fff;padding:0.65rem 1.35rem;border-radius:0.6rem;border:none;font-family:inherit;font-weight:700;font-size:0.88rem;cursor:pointer;box-shadow:0 4px 15px rgba(20,184,166,0.3);transition:all 0.25s;white-space:nowrap;flex-shrink:0}.exam-mode-start__btn:hover{transform:translateY(-2px);box-shadow:0 6px 22px rgba(20,184,166,0.4)}@media (max-width:580px){.exam-mode-start__inner{flex-wrap:wrap}.exam-mode-start__btn{width:100%;justify-content:center}}.exam-mode-timer{position:fixed;top:0;left:0;right:0;z-index:10000;background:linear-gradient(135deg,#0c1929,#0f2942);color:#fff;box-shadow:0 4px 20px rgba(0,0,0,0.3)}.exam-mode-timer__inner{display:flex;align-items:center;justify-content:space-between;padding:0.75rem 1.5rem;max-width:1200px;margin:0 auto}.exam-mode-timer__left{display:flex;align-items:center;gap:0.75rem}.exam-mode-timer__right{display:flex;align-items:center;gap:1rem}.exam-mode-timer__label{font-size:0.72rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:rgba(255,255,255,0.6)}.exam-mode-timer__time{font-size:1.5rem;font-weight:800;font-variant-numeric:tabular-nums;color:#5eead4;letter-spacing:0.02em}.exam-mode-timer__marks{font-size:0.78rem;font-weight:600;color:rgba(255,255,255,0.5);border:1px solid rgba(255,255,255,0.15);padding:0.3rem 0.7rem;border-radius:999px}.exam-mode-timer__submit{background:#14b8a6;color:#fff;border:none;padding:0.5rem 1.25rem;border-radius:0.5rem;font-family:inherit;font-weight:700;font-size:0.82rem;cursor:pointer;transition:all 0.2s}.exam-mode-timer__submit:hover{background:#0d9488;transform:scale(1.03)}.exam-mode-timer__progress{height:3px;background:rgba(255,255,255,0.08)}.exam-mode-timer__bar{height:100%;background:linear-gradient(90deg,#14b8a6,#5eead4);width:0%;transition:width 1s linear}.exam-mode-timer--warning .exam-mode-timer__time{color:#fbbf24}.exam-mode-timer--warning .exam-mode-timer__bar{background:linear-gradient(90deg,#f59e0b,#fbbf24)}.exam-mode-timer--danger .exam-mode-timer__time{color:#f87171;animation:examTimerPulse 1s ease-in-out infinite}.exam-mode-timer--danger .exam-mode-timer__bar{background:linear-gradient(90deg,#ef4444,#f87171)}@keyframes examTimerPulse{0%,100%{opacity:1}50%{opacity:0.5}}.exam-mode-timer--grading{background:linear-gradient(135deg,#1e1b4b,#312e81);top:var(--nav-height,60px);z-index:1050}.exam-mode-timer__spinner{width:18px;height:18px;border:2.5px solid rgba(255,255,255,0.2);border-top-color:#818cf8;border-radius:50%;animation:examSpin 0.8s linear infinite;display:inline-block}@keyframes examSpin{to{transform:rotate(360deg)}}.exam-mode-timer--results{background:linear-gradient(135deg,#0c1929,#0f2942);top:var(--nav-height,60px);z-index:1050}.exam-mode-results__score{font-size:1.4rem;font-weight:800}.exam-mode-results__score--excellent{color:#10b981}.exam-mode-results__score--good{color:#14b8a6}.exam-mode-results__score--needs-work{color:#fbbf24}.exam-mode-results__score--retry{color:#f87171}.exam-mode-results__grade{font-size:0.82rem;font-weight:700;padding:0.2rem 0.8rem;border-radius:999px}.exam-mode-results__grade--excellent{background:rgba(16,185,129,0.15);color:#10b981}.exam-mode-results__grade--good{background:rgba(20,184,166,0.15);color:#5eead4}.exam-mode-results__grade--needs-work{background:rgba(245,158,11,0.15);color:#fbbf24}.exam-mode-results__grade--retry{background:rgba(248,113,113,0.15);color:#f87171}.exam-mode-answer{display:block;width:100%;padding:0.85rem 1rem;border:2px solid var(--color-border,#e2e8f0);border-radius:0.6rem;font-family:inherit;font-size:0.92rem;line-height:1.6;resize:vertical;margin:0.75rem 0;background:var(--color-surface-raised,#fff);color:var(--color-navy,#0f172a);transition:border-color 0.25s}.exam-mode-answer:focus{outline:none;border-color:#14b8a6;box-shadow:0 0 0 3px rgba(20,184,166,0.12)}.exam-mode-answer--locked{background:var(--color-surface-sunken,#f1f5f9);opacity:0.7;cursor:not-allowed}.exam-mode-feedback{margin:0.5rem 0 1.25rem;padding:1rem 1.25rem;border-radius:0.6rem;border-left:4px solid #94a3b8;background:var(--color-surface-sunken,#f8fafc)}.exam-mode-feedback__head{display:flex;align-items:center;gap:0.5rem;margin-bottom:0.5rem}.exam-mode-feedback__score{font-weight:800;font-size:0.95rem;padding:0.15rem 0.6rem;border-radius:6px}.exam-mode-feedback__text{font-size:0.88rem;line-height:1.65;color:var(--color-text,#334155)}.exam-mode-feedback__text strong{color:var(--color-navy,#0f172a)}.exam-mode-feedback--great{border-left-color:#10b981;background:rgba(16,185,129,0.05)}.exam-mode-feedback--great .exam-mode-feedback__score{background:rgba(16,185,129,0.12);color:#059669}.exam-mode-feedback--ok{border-left-color:#f59e0b;background:rgba(245,158,11,0.05)}.exam-mode-feedback--ok .exam-mode-feedback__score{background:rgba(245,158,11,0.12);color:#d97706}.exam-mode-feedback--poor{border-left-color:#ef4444;background:rgba(239,68,68,0.05)}.exam-mode-feedback--poor .exam-mode-feedback__score{background:rgba(239,68,68,0.12);color:#dc2626}.exam-mode-active{padding-top:60px !important}.exam-mode-active .navbar{top:55px}.exam-mode-active .ib-exam-q__answer-lines,.exam-mode-active .aqa-exam-q__answer-lines{display:none}.exam-mode-results-active{padding-top:120px !important}.exam-mode-mcq--selected{border-color:#14b8a6 !important;background:rgba(20,184,166,0.08) !important;box-shadow:0 0 0 2px rgba(20,184,166,0.25);color:var(--color-navy,#0f172a) !important}.exam-mode-mcq--locked{opacity:0.55;cursor:not-allowed !important;pointer-events:none}.exam-mode-mcq--locked.exam-mode-mcq--selected{opacity:1}.exam-mode-lock-tag{display:flex;align-items:center;gap:0.35rem;font-size:0.72rem;font-weight:600;color:#14b8a6;margin-top:0.5rem;padding:0.3rem 0.6rem;background:rgba(20,184,166,0.06);border-radius:6px;width:fit-content}.exam-mode-answer-wrap{margin:0.75rem 0}.exam-mode-answer-wrap .exam-mode-answer{margin:0 0 0.5rem}.exam-mode-lock-btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.45rem 1rem;border-radius:0.5rem;border:1px solid var(--color-border,#e2e8f0);background:var(--color-surface-raised,#fff);color:var(--color-text-muted,#64748b);font-family:inherit;font-size:0.78rem;font-weight:600;cursor:pointer;transition:all 0.2s}.exam-mode-lock-btn:hover{border-color:#14b8a6;color:#14b8a6;background:rgba(20,184,166,0.04)}.exam-mode-lock-btn--done{background:rgba(20,184,166,0.08) !important;border-color:#14b8a6 !important;color:#0d9488 !important;cursor:default !important;pointer-events:none}.exam-mode-results__breakdown{font-size:0.72rem;font-weight:600;color:rgba(255,255,255,0.45);border-left:1px solid rgba(255,255,255,0.15);padding-left:0.75rem;margin-left:0.25rem}[data-theme="dark"] .exam-mode-start{background:rgba(15,23,42,0.8);border-color:rgba(255,255,255,0.08)}[data-theme="dark"] .exam-mode-start__text strong{color:#e2e8f0}[data-theme="dark"] .exam-mode-answer{background:#1e293b;border-color:#334155;color:#e2e8f0}[data-theme="dark"] .exam-mode-feedback{background:rgba(30,41,59,0.5)}[data-theme="dark"] .exam-mode-feedback__text{color:#cbd5e1}[data-theme="dark"] .exam-mode-feedback__text strong{color:#e2e8f0}.exam-modal-overlay{position:fixed;inset:0;z-index:10001;background:rgba(15,23,42,0.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:1.5rem;opacity:0;transition:opacity 0.2s ease}.exam-modal-overlay--visible{opacity:1}.exam-modal{background:var(--color-glass-card-bg,rgba(255,255,255,0.95));backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--color-glass-card-border,rgba(255,255,255,0.3));border-radius:1.25rem;padding:2rem 2.25rem;max-width:420px;width:100%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,0.15),0 0 0 1px rgba(255,255,255,0.1);transform:scale(0.95) translateY(8px);transition:transform 0.2s ease}.exam-modal-overlay--visible .exam-modal{transform:scale(1) translateY(0)}.exam-modal__icon{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,rgba(245,158,11,0.1),rgba(234,88,12,0.08));display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;color:#f59e0b}.exam-modal__title{font-size:1.15rem;font-weight:800;color:var(--color-navy,#0f172a);margin:0 0 0.5rem}.exam-modal__text{font-size:0.88rem;line-height:1.6;color:var(--color-text-muted,#64748b);margin:0 0 1.5rem}.exam-modal__text strong{color:var(--color-navy,#0f172a)}.exam-modal__actions{display:flex;gap:0.75rem}.exam-modal__btn{flex:1;padding:0.7rem 1rem;border-radius:0.6rem;font-family:inherit;font-weight:700;font-size:0.85rem;cursor:pointer;transition:all 0.2s;border:none;display:inline-flex;align-items:center;justify-content:center;gap:0.4rem}.exam-modal__btn--cancel{background:var(--color-surface-sunken,#f1f5f9);color:var(--color-text-muted,#64748b);border:1px solid var(--color-border,#e2e8f0)}.exam-modal__btn--cancel:hover{background:var(--color-surface-raised,#e2e8f0);color:var(--color-navy,#0f172a)}.exam-modal__btn--submit{background:linear-gradient(135deg,#14b8a6,#0d9488);color:#fff;box-shadow:0 4px 15px rgba(20,184,166,0.3)}.exam-modal__btn--submit:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(20,184,166,0.4)}[data-theme="dark"] .exam-modal{background:rgba(15,23,42,0.95);border-color:rgba(255,255,255,0.08);box-shadow:0 20px 60px rgba(0,0,0,0.4)}[data-theme="dark"] .exam-modal__title{color:#e2e8f0}[data-theme="dark"] .exam-modal__text strong{color:#e2e8f0}[data-theme="dark"] .exam-modal__btn--cancel{background:#1e293b;border-color:#334155;color:#94a3b8}@media (max-width:640px){.exam-mode-timer__inner{padding:0.6rem 1rem;flex-wrap:wrap;gap:0.5rem}.exam-mode-timer__time{font-size:1.2rem}.exam-mode-timer__marks{display:none}.exam-mode-results__score{font-size:1.15rem}.exam-mode-active,.exam-mode-results-active{padding-top:100px !important}.exam-modal{padding:1.5rem}.exam-modal__actions{flex-direction:column}.exam-mode-card{padding:2rem 1.5rem}.exam-mode-card__title{font-size:1.4rem}.exam-hub-nav{display:none}.exam-topic-grid{grid-template-columns:1fr}}