:root{--saffron: #FF9933;--saffron-dark: #E68A00;--saffron-light: #FFF5E6;--navy: #000080;--navy-light: #E8E8FF;--india-green: #138808;--india-green-light: #E6F5E6;--history: #8B4513;--geography: #228B22;--polity: #000080;--economics: #B8860B;--environment: #32CD32;--current-affairs: #FF4500;--pyq: #9C27B0;--bg: #F7F7FA;--surface: #FFFFFF;--surface-variant: #F0F0F5;--surface-hover: #F5F5FA;--text: #1A1A2E;--text-secondary: #6B7280;--text-tertiary: #9CA3AF;--error: #DC2626;--error-light: #FEE2E2;--border: #E5E7EB;--border-light: #F3F4F6;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 12px rgba(0,0,0,.08);--shadow-lg: 0 8px 24px rgba(0,0,0,.12);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s cubic-bezier(.4, 0, .2, 1)}.app{max-width:900px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.app-content{flex:1;overflow-y:auto;padding-bottom:80px}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:900px;display:flex;background:var(--surface);border-top:1px solid var(--border);padding:4px 8px env(safe-area-inset-bottom,8px);z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffeb}.nav-tab{flex:1;display:flex;flex-direction:column;align-items:center;padding:6px 0;text-decoration:none;color:var(--text-tertiary);font-size:10px;font-weight:500;transition:color var(--transition-fast);position:relative}.nav-tab.active{color:var(--saffron)}.nav-tab.active:before{content:"";position:absolute;top:-4px;left:50%;transform:translate(-50%);width:20px;height:3px;background:var(--saffron);border-radius:0 0 3px 3px}.nav-icon{font-size:22px;margin-bottom:2px;display:flex;align-items:center;justify-content:center;width:24px;height:24px}.nav-label{font-weight:600;letter-spacing:.2px}.screen{padding:20px 16px;animation:pageEnter .3s ease}@keyframes pageEnter{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.screen-title{font-size:28px;font-weight:800;color:var(--text);margin-bottom:2px;letter-spacing:-.5px}.screen-subtitle{font-size:14px;color:var(--text-secondary);margin-bottom:16px;font-weight:400}.card{background:var(--surface);border-radius:var(--radius-lg);padding:16px;margin-bottom:12px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);transition:box-shadow var(--transition-fast),transform var(--transition-fast)}.card-clickable{cursor:pointer}.card-clickable:hover{box-shadow:var(--shadow-md)}.card-clickable:active{transform:scale(.985)}.subject-card{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:var(--radius-md);background:var(--surface);margin-bottom:10px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);cursor:pointer;transition:all var(--transition-fast);border-left:4px solid}.subject-card:hover{box-shadow:var(--shadow-md);transform:translate(2px)}.subject-card:active{transform:scale(.98)}.subject-icon{width:44px;height:44px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;flex-shrink:0}.subject-info{flex:1}.subject-name{font-weight:600;font-size:15px;color:var(--text)}.subject-hindi{font-size:12px;color:var(--text-secondary);margin-top:1px}.subject-count{font-size:12px;color:var(--text-tertiary);margin-top:2px}.subject-arrow{color:var(--text-tertiary);font-size:18px;transition:transform var(--transition-fast)}.subject-card:hover .subject-arrow{transform:translate(2px)}.action-card{display:flex;align-items:center;gap:14px;padding:18px 16px;border-radius:var(--radius-lg);cursor:pointer;margin-bottom:12px;color:#fff;transition:all var(--transition-fast);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.action-card:after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.1) 0%,transparent 50%);pointer-events:none}.action-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.action-card:active{transform:scale(.98)}.action-icon{font-size:28px;display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:#ffffff26;border-radius:var(--radius-sm);flex-shrink:0}.action-title{font-weight:700;font-size:15px}.action-desc{font-size:12px;opacity:.85;margin-top:2px}.flashcard-container{margin:16px 0;perspective:1200px;cursor:pointer}.flashcard-inner{position:relative;width:100%;min-height:300px;transition:transform .6s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.flashcard-inner.flipped{transform:rotateY(180deg)}.flashcard-face{width:100%;min-height:300px;border-radius:var(--radius-xl);padding:28px 24px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;backface-visibility:hidden;-webkit-backface-visibility:hidden}.flashcard-front{background:linear-gradient(145deg,var(--saffron),var(--saffron-dark));color:#fff;box-shadow:0 8px 32px #ff99334d}.flashcard-back{background:var(--surface);border:2px solid var(--saffron);color:var(--text);position:absolute;top:0;left:0;right:0;transform:rotateY(180deg);box-shadow:var(--shadow-lg)}.flashcard-label{font-size:11px;text-transform:uppercase;letter-spacing:2px;opacity:.7;margin-bottom:16px;font-weight:600}.flashcard-text{font-size:18px;line-height:1.6;font-weight:600}.flashcard-hindi{font-size:14px;opacity:.8;margin-top:12px}.flashcard-meta{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.tag{font-size:11px;padding:4px 10px;border-radius:var(--radius-full);background:#fff3;font-weight:500;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.flashcard-back .tag{background:var(--surface-variant);color:var(--text-secondary)}.rating-buttons{display:flex;gap:8px;margin-top:16px}.rating-btn{flex:1;padding:12px 8px;border:none;border-radius:var(--radius-md);font-size:13px;font-weight:600;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;transition:all var(--transition-fast)}.rating-btn:active{transform:scale(.92)}.rating-emoji{font-size:24px}.btn-again{background:var(--error-light);color:#dc2626}.btn-hard{background:#fff3e0;color:#e65100}.btn-good{background:var(--india-green-light);color:#2e7d32}.btn-easy{background:#e3f2fd;color:#1565c0}.study-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--border)}.study-progress{font-size:14px;color:var(--text-secondary);font-weight:500}.study-back{background:none;border:none;font-size:15px;cursor:pointer;color:var(--text-secondary);padding:6px 10px;border-radius:var(--radius-sm);transition:background var(--transition-fast);font-weight:500}.study-back:hover{background:var(--surface-variant)}.stat-row{display:flex;gap:10px;margin-bottom:16px}.stat-box{flex:1;background:var(--surface);border-radius:var(--radius-md);padding:16px 12px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);transition:all var(--transition-fast)}.stat-box:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.stat-value{font-size:24px;font-weight:800;color:var(--saffron);letter-spacing:-.5px}.stat-label{font-size:11px;color:var(--text-tertiary);margin-top:4px;font-weight:500;text-transform:uppercase;letter-spacing:.5px}.pib-card{background:var(--surface);border-radius:var(--radius-md);padding:16px;margin-bottom:12px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);cursor:pointer;transition:all var(--transition-fast)}.pib-card:hover{box-shadow:var(--shadow-md)}.pib-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.pib-ministry{font-size:11px;padding:3px 10px;border-radius:var(--radius-full);background:#ff450014;color:var(--current-affairs);font-weight:600}.pib-date{font-size:11px;color:var(--text-tertiary)}.pib-question{font-size:15px;font-weight:600;line-height:1.5;color:var(--text)}.pib-tap{font-size:12px;color:var(--saffron);margin-top:8px;font-weight:500}.pib-answer{margin-top:12px;padding-top:12px;border-top:1px solid var(--border-light);font-size:14px;color:var(--text-secondary);line-height:1.6;animation:fadeSlideIn .3s ease}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.info-banner{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:var(--radius-md);margin-bottom:12px}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 0;color:var(--text-secondary)}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--saffron);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.skeleton{background:linear-gradient(90deg,var(--surface-variant) 25%,#E8E8ED 50%,var(--surface-variant) 75%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-card{height:80px;margin-bottom:12px;border-radius:var(--radius-md)}.skeleton-stat{height:72px;flex:1;border-radius:var(--radius-md)}.skeleton-text{height:14px;margin-bottom:8px;width:60%}.skeleton-text-full{height:14px;margin-bottom:8px;width:100%}.btn-primary{width:100%;padding:14px;background:linear-gradient(135deg,var(--saffron),var(--saffron-dark));color:#fff;border:none;border-radius:var(--radius-md);font-size:16px;font-weight:700;cursor:pointer;transition:all var(--transition-fast);box-shadow:0 2px 8px #ff99334d;position:relative;overflow:hidden}.btn-primary:hover{box-shadow:0 4px 16px #f936;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0) scale(.98)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-outline{width:100%;padding:14px;background:transparent;color:var(--saffron);border:2px solid var(--saffron);border-radius:var(--radius-md);font-size:16px;font-weight:700;cursor:pointer;transition:all var(--transition-fast)}.btn-outline:hover{background:var(--saffron-light)}.section-header{font-size:18px;font-weight:700;margin:24px 0 12px;color:var(--text);letter-spacing:-.3px}.profile-card{display:flex;align-items:center;gap:16px;padding:20px;background:var(--surface);border-radius:var(--radius-lg);margin-bottom:16px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light)}.profile-avatar{width:56px;height:56px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--saffron),var(--saffron-dark));display:flex;align-items:center;justify-content:center;font-size:24px;color:#fff;font-weight:700;box-shadow:0 4px 12px #ff99334d}.profile-name{font-size:18px;font-weight:700;color:var(--text)}.profile-tier{font-size:12px;padding:3px 10px;border-radius:var(--radius-full);display:inline-block;margin-top:4px;font-weight:600}.tier-free{background:var(--surface-variant);color:var(--text-secondary)}.tier-pro{background:#ff99331f;color:var(--saffron-dark)}.tier-lifetime{background:#1388081f;color:var(--india-green)}.empty-state{text-align:center;padding:48px 24px;color:var(--text-secondary)}.empty-icon{font-size:48px;margin-bottom:12px}.chip{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;border-radius:var(--radius-full);font-size:12px;font-weight:600;background:var(--surface);color:var(--text-secondary);border:1px solid var(--border);transition:all var(--transition-fast);cursor:pointer}.chip:hover{background:var(--surface-variant)}.chip.active{background:#ff99331a;color:var(--saffron);border-color:var(--saffron)}.install-banner{background:linear-gradient(135deg,var(--saffron),var(--saffron-dark));color:#fff;padding:14px 16px;display:flex;flex-direction:column;gap:10px;animation:slideDown .4s cubic-bezier(.4,0,.2,1)}@keyframes slideDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}.install-banner-content{display:flex;align-items:center;gap:12px}.install-banner-icon{font-size:28px}.install-banner-title{font-weight:700;font-size:15px}.install-banner-desc{font-size:12px;opacity:.9}.install-banner-actions{display:flex;gap:8px;justify-content:flex-end}.install-btn-primary{background:#fff;color:var(--saffron-dark);border:none;border-radius:var(--radius-sm);padding:8px 20px;font-size:13px;font-weight:700;cursor:pointer}.install-btn-dismiss{background:transparent;color:#ffffffd9;border:1px solid rgba(255,255,255,.4);border-radius:var(--radius-sm);padding:8px 16px;font-size:13px;cursor:pointer}.trust-badge{display:flex;align-items:center;justify-content:center;gap:6px;font-size:11px;color:var(--text-tertiary);letter-spacing:.3px;margin-bottom:16px;font-weight:500}.trust-badge-icon{font-size:13px}.about-heading{font-size:20px;font-weight:800;color:var(--text);margin-bottom:8px}.about-credentials{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--text-secondary);font-weight:500;margin-bottom:8px}.about-mission{font-size:13px;color:var(--text-tertiary);line-height:1.5}.about-version{font-size:11px;color:var(--text-tertiary);margin-top:12px}.streak-card{background:var(--surface);border-radius:var(--radius-lg);padding:16px;margin-bottom:16px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light)}.streak-counter{display:flex;align-items:center;gap:8px;margin-bottom:12px}.streak-fire{font-size:28px}.streak-number{font-size:28px;font-weight:800;color:var(--saffron);letter-spacing:-1px}.streak-label{font-size:13px;color:var(--text-secondary);font-weight:500}.streak-muted{opacity:.4}.progress-bar-container{height:8px;background:var(--surface-variant);border-radius:var(--radius-full);overflow:hidden;margin-bottom:4px}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--saffron),var(--saffron-dark));border-radius:var(--radius-full);transition:width .5s cubic-bezier(.4,0,.2,1)}.progress-text{font-size:12px;color:var(--text-secondary);margin-bottom:12px;font-weight:500}.heatmap-row{display:flex;gap:6px;justify-content:center}.heatmap-day{display:flex;flex-direction:column;align-items:center;gap:4px}.heatmap-cell{width:28px;height:28px;border-radius:6px;transition:background var(--transition-fast)}.heatmap-none{background:var(--surface-variant)}.heatmap-some{background:#ffd4a3}.heatmap-high{background:var(--saffron)}.heatmap-label{font-size:10px;color:var(--text-tertiary);font-weight:500}.celebration-banner{padding:12px;border-radius:var(--radius-sm);text-align:center;margin-top:12px;font-size:14px;font-weight:600;animation:fadeSlideIn .3s ease}.celebration-milestone{background:linear-gradient(135deg,gold,orange);color:#fff}.celebration-goal{background:linear-gradient(135deg,var(--india-green),#0e6606);color:#fff}.celebration-dismiss{background:none;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:6px;padding:4px 12px;font-size:12px;cursor:pointer;margin-top:8px}.mode-toggle{display:flex;background:var(--surface-variant);border-radius:var(--radius-sm);padding:3px;margin-bottom:16px}.mode-toggle-btn,.mode-btn{flex:1;padding:10px;border:none;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;background:transparent;color:var(--text-secondary);transition:all var(--transition-fast)}.mode-toggle-btn.active,.mode-btn.active{background:var(--saffron);color:#fff;box-shadow:0 2px 8px #ff99334d}.mcq-config{padding:0}.mcq-config-section{margin-bottom:16px}.mcq-config-label{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--text)}.mcq-options-row{display:flex;gap:8px;flex-wrap:wrap}.mcq-option-chip{padding:8px 16px;border-radius:var(--radius-full);border:2px solid var(--border);background:var(--surface);font-size:13px;font-weight:600;cursor:pointer;transition:all var(--transition-fast);color:var(--text-secondary)}.mcq-option-chip:hover{border-color:var(--saffron)}.mcq-option-chip.active{border-color:var(--saffron);background:#ff993314;color:var(--saffron)}.mcq-question-card{background:var(--surface);border-radius:var(--radius-lg);padding:20px;margin-bottom:16px;box-shadow:var(--shadow-md);border:1px solid var(--border-light)}.mcq-question-text{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:16px;color:var(--text)}.mcq-answer-btn{width:100%;padding:14px 16px;border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);font-size:14px;text-align:left;cursor:pointer;margin-bottom:8px;display:flex;align-items:center;gap:12px;transition:all var(--transition-fast);color:var(--text)}.mcq-answer-btn:hover:not(:disabled){border-color:var(--saffron);background:var(--saffron-light)}.mcq-answer-btn:disabled{cursor:default}.mcq-answer-label{width:28px;height:28px;border-radius:50%;background:var(--surface-variant);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;color:var(--text-secondary)}.mcq-correct{border-color:var(--india-green);background:#1388080f}.mcq-correct .mcq-answer-label{background:var(--india-green);color:#fff}.mcq-incorrect{border-color:var(--error);background:#dc26260f}.mcq-incorrect .mcq-answer-label{background:var(--error);color:#fff}.mcq-explanation{background:var(--surface-variant);border-radius:var(--radius-sm);padding:12px;margin-top:12px;font-size:13px;line-height:1.6;color:var(--text-secondary)}.mcq-timer{font-size:18px;font-weight:800;text-align:center;margin-bottom:12px;color:var(--text)}.mcq-timer-warning{color:var(--error);animation:pulse 1s ease infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.mcq-score-circle{width:120px;height:120px;border-radius:50%;border:6px solid var(--saffron);display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 16px;box-shadow:0 4px 20px #f933}.mcq-score-value{font-size:32px;font-weight:800;color:var(--saffron)}.mcq-score-label{font-size:12px;color:var(--text-secondary)}.mcq-review-item{padding:12px;border-radius:var(--radius-sm);margin-bottom:8px;cursor:pointer;background:var(--surface);border:1px solid var(--border);transition:all var(--transition-fast)}.mcq-review-item:hover{box-shadow:var(--shadow-sm)}.mcq-review-correct{border-left:4px solid var(--india-green)}.mcq-review-wrong{border-left:4px solid var(--error)}.paper-chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;margin-bottom:16px;-webkit-overflow-scrolling:touch;scrollbar-width:none}.paper-chips::-webkit-scrollbar{display:none}.paper-chip{padding:8px 16px;border-radius:var(--radius-full);border:2px solid var(--border);background:var(--surface);font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);color:var(--text-secondary)}.paper-chip:hover{border-color:var(--saffron)}.paper-chip.active{border-color:var(--saffron);background:#ff993314;color:var(--saffron)}.topic-list{margin-bottom:16px}.topic-item{padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:6px;font-size:13px;cursor:pointer;background:var(--surface);border:1px solid var(--border);transition:all var(--transition-fast);color:var(--text)}.topic-item:hover{border-color:var(--saffron);background:var(--saffron-light)}.topic-item.active{border-color:var(--saffron);background:#ff99330f;color:var(--saffron);font-weight:600}.mains-textarea{width:100%;min-height:200px;padding:14px;border:2px solid var(--border);border-radius:var(--radius-md);font-size:14px;font-family:inherit;line-height:1.6;resize:vertical;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);color:var(--text);background:var(--surface)}.mains-textarea:focus{border-color:var(--saffron);box-shadow:0 0 0 3px #ff99331a}.mains-textarea:disabled{background:var(--surface-variant);opacity:.6}.word-count{font-size:12px;color:var(--text-tertiary);text-align:right;margin-top:4px;margin-bottom:12px;font-weight:500}.score-display{text-align:center;margin-bottom:20px}.score-big{font-size:48px;font-weight:800;color:var(--saffron)}.score-max{font-size:20px;color:var(--text-tertiary)}.dimension-row{margin-bottom:14px}.dimension-header{display:flex;justify-content:space-between;margin-bottom:6px}.dimension-name{font-size:13px;font-weight:700;color:var(--text)}.dimension-score{font-size:13px;color:var(--saffron);font-weight:700}.dimension-bar{height:6px;background:var(--surface-variant);border-radius:var(--radius-full);overflow:hidden}.dimension-fill{height:100%;background:linear-gradient(90deg,var(--saffron),var(--saffron-dark));border-radius:var(--radius-full);transition:width .5s 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