:root{font-family:Plus Jakarta Sans,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--primary-color: #6366f1;--primary-hover: #4f46e5;--danger-color: #ef4444;--danger-hover: #dc2626;--success-color: #22c55e;--warning-color: #f59e0b;--gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--gradient-accent: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);--gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);--gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);--gradient-success: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);--glow-primary: 0 0 20px rgba(99, 102, 241, .35);--glow-accent: 0 0 20px rgba(6, 182, 212, .3);--glow-danger: 0 0 20px rgba(239, 68, 68, .35);--shadow-xs: 0 1px 2px rgba(0, 0, 0, .05);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08), 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .1), 0 2px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .12), 0 4px 12px rgba(0, 0, 0, .08);--shadow-xl: 0 20px 50px rgba(0, 0, 0, .16), 0 8px 20px rgba(0, 0, 0, .1);--border-radius-xs: 4px;--border-radius-sm: 8px;--border-radius-md: 12px;--border-radius-lg: 16px;--border-radius-xl: 24px;--border-radius-full: 9999px;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--transition: all .25s cubic-bezier(.4, 0, .2, 1);--transition-fast: all .15s cubic-bezier(.4, 0, .2, 1);--transition-slow: all .4s cubic-bezier(.4, 0, .2, 1);--transition-bounce: all .3s cubic-bezier(.34, 1.56, .64, 1)}:root,:root.theme-light{--bg-color: #f5f5f7;--bg-secondary: #ffffff;--bg-tertiary: #f0f0f4;--text-primary: #213547;--text-secondary: #555555;--text-muted: #888888;--border-color: #e0e0e8;--card-bg: #ffffff;--card-shadow: rgba(0, 0, 0, .08);--input-bg: #ffffff;--input-border: #d8d8e8;--nav-bg: rgba(255, 255, 255, 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rgba(0, 0, 0, .35), 0 2px 6px rgba(0, 0, 0, .25);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .45), 0 4px 12px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 50px rgba(0, 0, 0, .55), 0 8px 20px rgba(0, 0, 0, .4)}@media(prefers-color-scheme:dark){:root:not(.theme-light){--bg-color: #0f0f13;--bg-secondary: #161620;--bg-tertiary: #1a1a26;--text-primary: #e8e8f0;--text-secondary: #b0b0c8;--text-muted: #6e6e88;--border-color: #2a2a3a;--card-bg: #1c1c28;--card-shadow: rgba(0, 0, 0, .4);--input-bg: #22222e;--input-border: #32323f;--nav-bg: rgba(22, 22, 32, .9);--nav-text: #b0b0c8;--primary-color: #818cf8;--primary-hover: #6366f1;--warning-bg: #332b00;--warning-text: #fbbf24;--success-bg: #0f2e1b;--success-text: #4ade80;--surface-elevated: rgba(255, 255, 255, .06);--border-subtle: rgba(99, 102, 241, .15);--scrollbar-thumb: rgba(99, 102, 241, .3);--scrollbar-track: transparent;--glow-primary: 0 0 24px rgba(99, 102, 241, .45);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .25), 0 1px 3px rgba(0, 0, 0, .2);--shadow-md: 0 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infinite;border-radius:var(--border-radius-xs)}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.landing-page{background-color:var(--bg-secondary);color:var(--text-primary)}.btn-secondary{background-color:var(--bg-secondary);color:var(--primary-color);border:2px solid var(--primary-color);padding:.875rem 2rem;border-radius:var(--border-radius-sm);font-size:1.1rem;font-weight:500;cursor:pointer;transition:var(--transition)}.btn-secondary:hover:not(:disabled){background-color:var(--bg-color);border-color:var(--primary-hover);color:var(--primary-hover)}.error-message{color:var(--danger-color);background-color:var(--warning-bg);padding:.75rem 1rem;border-radius:var(--border-radius-sm);margin-top:1rem;font-size:.875rem}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.landing-header{background-color:#ffffffb8;backdrop-filter:blur(12px) saturate(180%);-webkit-backdrop-filter:blur(12px) saturate(180%);border-bottom:1px solid rgba(0,0,0,.06);padding:1rem 0;position:sticky;top:0;z-index:100}:root.theme-dark .landing-header{background-color:#1e1e1eb8;border-bottom:1px solid rgba(255,255,255,.05)}.landing-header .container{display:flex;justify-content:space-between;align-items:center}.logo{font-weight:700;font-size:1.25rem;color:var(--text-primary);text-decoration:none}.landing-header nav{display:flex;align-items:center;gap:1.5rem}.landing-header nav a{text-decoration:none;color:var(--text-secondary);font-weight:500;transition:var(--transition)}.landing-header nav a:hover{color:var(--primary-color)}.btn-signin{background-color:var(--primary-color);color:#fff;border:none;padding:.5rem 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h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem}.section-description{font-size:1.1rem;color:var(--text-secondary);margin-bottom:3rem;max-width:600px;margin-left:auto;margin-right:auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;text-align:left}.feature-card{background-color:var(--bg-color);padding:2rem;border-radius:var(--border-radius-md);border:1px solid var(--border-color)}.feature-icon{font-size:2.5rem;margin-bottom:1rem}.feature-card h3{font-size:1.25rem;margin-bottom:.5rem}.feature-card p{color:var(--text-secondary);line-height:1.6}.how-it-works{padding:5rem 0;background-color:var(--bg-color);text-align:center}.how-it-works h2{font-size:2.5rem;font-weight:700;margin-bottom:3rem}.steps-container{display:flex;justify-content:space-between;gap:2rem;text-align:center}.step{flex:1}.step-number{width:50px;height:50px;border-radius:50%;background-color:var(--primary-color);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 1.5rem}.step h3{font-size:1.25rem;margin-bottom:.5rem}.step p{color:var(--text-secondary);line-height:1.6}.cta-section{padding:5rem 0;text-align:center;background-color:var(--bg-secondary);color:var(--text-primary);border-top:1px solid var(--border-color)}.cta-section h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem}.cta-section p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:2rem}.maintenance-types{padding:5rem 0;background-color:var(--bg-secondary);text-align:center}.maintenance-types h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem}.types-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;text-align:center;max-width:900px;margin:0 auto}.type-card{background-color:var(--bg-color);padding:1.75rem 1.5rem;border-radius:var(--border-radius-md);border:1px solid var(--border-color);transition:var(--transition)}.type-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--border-subtle)}.type-icon{font-size:2.5rem;display:block;margin-bottom:.75rem}.type-card h3{font-size:1.1rem;margin-bottom:.5rem}.type-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.5}.faq-section{padding:5rem 0;background-color:var(--bg-color);text-align:center}.faq-section h2{font-size:2.5rem;font-weight:700;margin-bottom:2.5rem}.faq-grid{max-width:750px;margin:0 auto;text-align:left}.faq-item{border:1px solid var(--border-color);border-radius:var(--border-radius-md);margin-bottom:.75rem;overflow:hidden;background-color:var(--bg-secondary)}.faq-item summary{padding:1.125rem 1.25rem;font-weight:600;font-size:1rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--text-primary)}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:1.25rem;font-weight:400;color:var(--text-muted);transition:var(--transition)}.faq-item[open] summary:after{content:"−"}.faq-item p{padding:0 1.25rem 1.125rem;color:var(--text-secondary);line-height:1.6;margin:0}.landing-footer{background-color:var(--bg-secondary);border-top:1px solid var(--border-color);padding:2rem 0;text-align:center}.landing-footer p{color:var(--text-muted);font-size:.875rem}@media(max-width:768px){.hero h1{font-size:2.5rem}.hero .subtitle{font-size:1.1rem}.features h2,.how-it-works h2,.cta-section h2,.maintenance-types h2,.faq-section 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.stats-grid{grid-template-columns:repeat(2,1fr);gap:.75rem}.stat-card{padding:1rem;gap:.75rem}.stat-icon{font-size:1.5rem;width:40px;height:40px;border-radius:10px}.stat-value{font-size:1.5rem}.stat-label{font-size:.75rem}}@media(max-width:360px){.stat-card{padding:.75rem;gap:.5rem}.stat-icon{font-size:1.25rem;width:36px;height:36px}.stat-value{font-size:1.25rem}}@media(prefers-reduced-motion:reduce){.stat-card{transition:none}.dashboard-stats.loading .stats-skeleton{animation:none;background:var(--border-color)}}.stats-trend-chart{background:var(--card-bg);border-radius:var(--border-radius-md);border:1px solid var(--border-color);padding:1.25rem 1.5rem;margin-top:1.5rem;box-shadow:var(--shadow-sm);text-align:left}.stats-trend-chart .chart-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.25rem}.stats-trend-chart h4{font-size:1.1rem;margin:0;color:var(--text-primary)}.stats-trend-chart .chart-info-tag{font-size:.75rem;color:var(--text-muted);background-color:var(--bg-color);padding:.25rem .5rem;border-radius:var(--border-radius-xs);border:1px solid var(--border-color)}.mini-bar-chart{display:flex;justify-content:space-around;align-items:flex-end;height:90px;padding:.5rem 0;gap:.5rem}.mini-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;height:100%}.mini-bar-wrapper{flex:1;width:100%;display:flex;align-items:flex-end;justify-content:center;position:relative}.mini-bar-fill{width:40%;max-width:24px;background:linear-gradient(180deg,var(--primary-color) 0%,rgba(99,102,241,.4) 100%);border-radius:var(--border-radius-xs) var(--border-radius-xs) 0 0;transition:var(--transition)}.mini-bar-col:hover .mini-bar-fill{background:linear-gradient(180deg,var(--primary-hover) 0%,rgba(99,102,241,.6) 100%);width:48%}.mini-bar-label{font-size:.75rem;color:var(--text-secondary);margin-top:.5rem}.mini-bar-tooltip{visibility:hidden;opacity:0;position:absolute;bottom:105%;left:50%;transform:translate(-50%);background-color:#1c1c28;color:#fff;text-align:center;padding:4px 8px;border-radius:var(--border-radius-xs);font-size:.75rem;white-space:nowrap;z-index:10;box-shadow:var(--shadow-md);transition:opacity .2s,visibility .2s}.mini-bar-col:hover .mini-bar-tooltip{visibility:visible;opacity:1}.animate-fade-in{animation:fadeIn .3s ease-out}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,to{transform:translateY(0);animation-timing-function:cubic-bezier(.8,0,1,1)}50%{transform:translateY(-15px);animation-timing-function:cubic-bezier(0,0,.2,1)}}@keyframes shimmer{0%{background-position:-200% center}to{background-position:200% center}}@keyframes pulseGlow{0%,to{box-shadow:0 4px 20px #6366f159}50%{box-shadow:0 8px 36px #6366f199}}.onboarding-container{max-width:900px;margin:2rem auto;padding:3rem 2.5rem;background:color-mix(in srgb,var(--card-bg) 92%,transparent);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);border-radius:var(--border-radius-lg);border:1px solid color-mix(in srgb,var(--primary-color) 12%,var(--border-color));box-shadow:0 0 0 1px #ffffff08,0 10px 40px #00000024,0 4px 16px #6366f114;text-align:center;position:relative;overflow:hidden;animation:fadeSlideIn .5s cubic-bezier(.2,.8,.2,1) both}.onboarding-container:before{content:"";position:absolute;top:-120px;left:50%;transform:translate(-50%);width:480px;height:280px;background:radial-gradient(ellipse at center,color-mix(in srgb,var(--primary-color) 12%,transparent) 0%,transparent 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span{color:var(--text-secondary);font-size:.82rem}.fuel-delete-btn{border:1px solid rgba(220,38,38,.25);border-radius:var(--border-radius-sm);padding:.5rem .75rem;background:#dc262614;color:#b91c1c;cursor:pointer;font-weight:700}.fuel-state,.fuel-empty-list{display:flex;min-height:280px;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:2rem}.fuel-empty-icon{font-size:4rem}@media(max-width:820px){.fuel-header{grid-template-columns:auto minmax(0,1fr)}.fuel-header select{grid-column:1 / -1;width:100%}.fuel-summary,.fuel-layout{grid-template-columns:1fr}.fuel-form{position:static}}@media(max-width:520px){.fuel-form-grid,.fuel-record-row{grid-template-columns:1fr}.fuel-record-metrics{text-align:left}}.parts-page{min-height:100vh;padding:20px 20px 110px;background:var(--bg-color);color:var(--text-primary)}.parts-header{max-width:1180px;margin:0 auto 20px;display:flex;align-items:center;gap:14px}.parts-header h1{margin:0;font-size:2rem}.parts-header 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1));padding:.625rem;min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;-webkit-tap-highlight-color:transparent;border-radius:var(--border-radius-sm, 8px);color:var(--danger-color, #ef4444)}.btn-delete:hover{opacity:1;transform:scale(1.1);background-color:#ef44441a}.btn-delete:active{transform:scale(.95)}.btn-edit{background:none;border:none;font-size:1.25rem;cursor:pointer;opacity:.55;transition:var(--transition, all .25s cubic-bezier(.4, 0, .2, 1));padding:.625rem;min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;-webkit-tap-highlight-color:transparent;border-radius:var(--border-radius-sm, 8px);color:var(--primary-color, #6366f1)}.btn-edit:hover{opacity:1;transform:scale(1.1);background-color:#6366f11a}.btn-edit:active{transform:scale(.95)}.back-btn{background:none;border:none;color:var(--primary-color, #6366f1);font-size:1rem;font-weight:600;cursor:pointer;padding:.5rem;transition:var(--transition-fast, all .15s cubic-bezier(.4, 0, .2, 1));border-radius:var(--border-radius-sm, 8px);display:inline-flex;align-items:center;gap:.375rem}.back-btn:hover{color:var(--primary-hover, #4f46e5);background-color:#6366f114;transform:translate(-2px)}.error-message{color:var(--danger-color, #ef4444);background:linear-gradient(135deg,#ef44441a,#dc26260f);border:1px solid rgba(239,68,68,.25);padding:.75rem 1rem;border-radius:var(--border-radius-sm, 8px);margin:1rem 0;font-size:.875rem;font-weight:500}.modal-overlay{position:fixed;inset:0;background-color:#00000073;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;animation:overlayFadeIn .2s ease-out}@keyframes overlayFadeIn{0%{opacity:0;-webkit-backdrop-filter:blur(0px);backdrop-filter:blur(0px)}to{opacity:1;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}}.modal{background-color:var(--card-bg, #ffffff);border-radius:var(--border-radius-lg, 16px);padding:2rem;max-width:500px;width:100%;box-shadow:var(--shadow-xl, 0 20px 50px rgba(0, 0, 0, .16));border:1px solid var(--border-subtle, rgba(99, 102, 241, .15));animation:modalSlideUp .3s cubic-bezier(.34,1.56,.64,1);position:relative;overflow:hidden}.modal:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient-primary, linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%));border-radius:var(--border-radius-lg, 16px) var(--border-radius-lg, 16px) 0 0}@keyframes modalSlideUp{0%{transform:translateY(16px) scale(.97);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.modal h3{margin-bottom:.75rem;color:var(--text-primary, #213547);font-size:1.25rem;font-weight:700}.modal p{margin-bottom:1.5rem;color:var(--text-secondary, #666);line-height:1.6}.modal-actions{display:flex;gap:.75rem;justify-content:flex-end}@media(max-width:768px){.modal{padding:1.5rem;border-radius:var(--border-radius-md, 12px)}.modal-actions{flex-direction:column-reverse}.modal-actions button{width:100%}}.offline-indicator{position:fixed;top:0;left:0;right:0;z-index:9999;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.625rem 1rem;font-size:.875rem;font-weight:600;animation:slideDown .35s cubic-bezier(.4,0,.2,1);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);letter-spacing:.01em}.offline-indicator.offline{background:linear-gradient(90deg,#ef4444eb,#dc2626eb);color:#fff;box-shadow:0 2px 12px #ef444466}.offline-indicator.online{background:linear-gradient(90deg,#22c55eeb,#16a34aeb);color:#fff;box-shadow:0 2px 12px #22c55e59}.offline-indicator-icon{font-size:1rem}@keyframes slideDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}.splash-screen{position:fixed;inset:0;z-index:99999;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#4f46e5,#7c3aed 80%);animation:splashFadeOut .45s cubic-bezier(.4,0,1,1) 1.1s forwards;overflow:hidden}.splash-screen:before{content:"";position:absolute;top:-20%;right:-15%;width:55vmax;height:55vmax;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.45) 0%,transparent 70%);pointer-events:none;animation:orb 6s ease-in-out infinite alternate}.splash-screen:after{content:"";position:absolute;bottom:-25%;left:-10%;width:50vmax;height:50vmax;border-radius:50%;background:radial-gradient(circle,rgba(6,182,212,.25) 0%,transparent 70%);pointer-events:none;animation:orb 8s ease-in-out infinite alternate-reverse}@keyframes orb{0%{transform:scale(1) translate(0)}to{transform:scale(1.08) translate(2%,3%)}}.splash-content{text-align:center;color:#fff;animation:splashZoomIn .55s cubic-bezier(.34,1.56,.64,1);position:relative;z-index:1}.splash-icon{font-size:4rem;margin-bottom:1rem;display:block;filter:drop-shadow(0 4px 16px rgba(0,0,0,.25))}.splash-title{font-size:2rem;font-weight:800;margin-bottom:.25rem;color:#fff;letter-spacing:-.025em;text-shadow:0 2px 12px rgba(0,0,0,.2)}.splash-subtitle{font-size:1rem;font-weight:500;opacity:.85;margin-bottom:2.5rem;letter-spacing:.01em}.splash-loader{width:40px;height:40px;margin:0 auto;border:3px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.splash-progress{position:absolute;bottom:0;left:0;right:0;height:3px;background:#ffffff26;overflow:hidden}.splash-progress:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#fff9,#fff,#fff9);transform-origin:left center;transform:scaleX(0);animation:progressFill 1.5s cubic-bezier(.4,0,.6,1) 0s forwards}@keyframes progressFill{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes splashZoomIn{0%{transform:scale(.82) translateY(8px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}@keyframes splashFadeOut{to{opacity:0;pointer-events:none}}