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var(--border-default);background:var(--bg-page);min-width:34px;height:34px;color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:manipulation;border-radius:7px;justify-content:center;align-items:center;padding:0 6px;font-family:Geist Mono,monospace;font-size:11.5px;font-weight:500;transition:all .15s;display:inline-flex}.stepper-btn:hover{background:var(--bg-elevated);border-color:var(--border-hover)}.stepper-btn:active{background:var(--bg-elevated);transform:scale(.94)}.range-input{min-width:0;accent-color:var(--accent);cursor:pointer;flex:1;height:6px}.range-ends{color:var(--text-muted);justify-content:space-between;margin-top:4px;font-family:Geist Mono,monospace;font-size:10px;display:flex}.auto-detect-features{background:var(--bg-page);border:1px solid var(--border-default);border-radius:8px;flex-direction:column;gap:10px;margin:14px 0 18px;padding:14px;display:flex}.auto-feature-item{color:var(--text-secondary);align-items:flex-start;gap:10px;font-size:12px;line-height:1.5;display:flex}.auto-feature-check{color:#17a673;flex-shrink:0;font-size:13px;font-weight:700}.auto-feature-info{color:var(--accent);flex-shrink:0;font-size:13px;font-weight:700}.input-with-unit{border:1px solid var(--border-default);background:var(--bg-page);border-radius:8px;align-items:center;height:42px;transition:border-color .15s;display:flex}.input-with-unit:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #0070f326}.input-with-unit input{width:100%;height:100%;color:var(--text-primary);background:0 0;border:0;outline:none;padding:0 12px;font-size:14px}.input-with-unit span{color:var(--text-tertiary);padding:0 14px;font-family:Geist Mono,monospace;font-size:12px}.calibration-panel select{border:1px solid var(--border-default);background:var(--bg-page);width:100%;height:42px;color:var(--text-primary);border-radius:8px;outline:none;padding:0 12px;font-size:13px;transition:border-color .15s}.calibration-panel select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #0070f326}.device-info{border:1px solid var(--border-default);background:var(--bg-page);color:var(--text-secondary);border-radius:8px;margin-top:12px;padding:12px;font-size:12px;line-height:1.5}.field-label{color:var(--text-secondary);justify-content:space-between;align-items:center;gap:10px;margin:14px 0 6px;font-size:12px;font-weight:500;display:flex}.field-label span{color:var(--text-tertiary);font-size:11px;font-weight:400}.dialog-submit{border-radius:8px;width:100%;min-height:42px;margin-top:18px;font-size:13px;font-weight:500}.calibration-note{border-top:1px solid var(--border-subtle);color:var(--text-tertiary);margin:0;padding:12px 24px;font-size:11px;line-height:1.5}.dialog-privacy{color:var(--text-muted);margin:0;padding:10px 24px 18px;font-size:10.5px}.dialog-privacy span{margin-right:5px}@media(min-width:1280px){.ruler-stage{height:420px}}@media(max-width:780px){.site-header{height:60px;padding:0 16px}.header-nav{gap:10px}.header-nav>a:not(.button),.header-calibrate-btn{display:none!important}.mobile-menu-toggle{display:inline-flex}.mobile-nav-backdrop,.mobile-nav-drawer{max-height:calc(100dvh - 60px);top:60px}.hero{padding:56px 16px 36px}.hero-features-bar{border-radius:14px;gap:10px 16px;padding:10px 16px}.hero-feature-divider{display:none}.tool-topbar{padding:0 16px}.tool-controls{flex-direction:column;align-items:stretch;gap:14px;padding:14px 16px;display:flex}.edge-control{width:100%;min-width:0}.edge-options{grid-template-columns:repeat(4,1fr);gap:6px;width:100%;display:grid}.edge-option{width:100%}.edge-option span{text-align:center;justify-content:center;width:100%;min-width:0;height:32px;padding:0 4px;font-size:11px}.control-group{width:100%;min-width:0}.segmented{grid-template-columns:repeat(4,1fr);gap:3px;width:100%;padding:3px;display:grid}.segmented button{text-align:center;width:100%;min-width:0;height:30px;padding:0;font-size:11px}.tool-btn-group{gap:6px;width:100%;display:flex}.tool-btn{flex:1;justify-content:center;min-width:0;height:32px;padding:0 8px;font-size:11px}.tool-btn kbd{display:none}.calibration-brief{border-left:0;border:1px solid var(--border-default);background:var(--bg-page);border-radius:8px;flex:none;width:100%;margin-top:2px;padding:12px 14px}.calibration-status small{font-size:10px}.tool-footnote{padding:0 16px}.calibration-section{padding:56px 16px 44px}.method-card{padding:18px 16px}.method-grid{grid-template-columns:repeat(2,1fr);gap:12px}.trust-band{grid-template-columns:34px 1fr;padding:22px 16px}.trust-band>a{grid-column:2}.privacy-note{padding:18px 16px}.privacy-badge{display:none}.site-footer{text-align:center;flex-direction:column;align-items:center;gap:14px;padding:24px 16px 20px}.footer-nav{flex-wrap:wrap;order:2;justify-content:center;gap:10px 18px;display:flex}.footer-copyright,.site-footer>span{white-space:nowrap;text-align:center;order:3;font-size:11px}.page-content{padding:50px 16px 70px}.article-header{margin-bottom:36px}.contact-form{margin:20px 0}.about-features-grid{grid-template-columns:repeat(2,1fr);gap:16px}.about-two-col{grid-template-columns:1fr;gap:24px}.contact-layout{grid-template-columns:1fr;gap:32px}.faq-grid{grid-template-columns:1fr;gap:16px}.legal-highlights{grid-template-columns:repeat(2,1fr);gap:12px}.legal-layout{grid-template-columns:1fr;gap:32px}.legal-sidebar{position:static}.error-destinations-grid{grid-template-columns:repeat(2,1fr);gap:14px}.troubleshoot-steps{grid-template-columns:1fr}.error-visual-card{flex-direction:column;align-items:flex-start;gap:10px}.home-guide-section{padding:56px 16px 44px}.guide-grid{grid-template-columns:1fr;gap:14px}.guide-card{padding:20px}.guide-summary-banner{flex-direction:column;gap:14px;padding:20px 18px}.home-faq-section{padding:56px 16px 44px}.faq-header{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:24px;padding-bottom:18px}.faq-accordion-actions{justify-content:space-between;width:100%}.faq-comparison-grid{grid-template-columns:1fr;gap:10px}.faq-accordion-summary{padding:16px}.faq-accordion-content{padding:14px 16px 18px}}@media(max-width:560px){.site-header{padding:0 14px}.brand{font-size:13px}.hero{padding:44px 14px 28px}.hero-badge-wrap{margin-bottom:16px}.hero-badge{padding:4px 10px 4px 7px;font-size:11px}.hero h1{font-size:clamp(30px,8.2vw,38px)}.hero-copy{max-width:100%;margin-top:12px;font-size:13.5px}.hero-actions{flex-direction:column;gap:10px;width:100%;margin-top:20px}.button-hero-primary,.button-hero-secondary,.contact-submit-btn{justify-content:center;width:100%}.hero-features-bar{text-align:left;border-radius:12px;grid-template-columns:repeat(2,1fr);gap:10px;width:100%;padding:12px 14px;display:grid}.hero-feature-item{font-size:11px}.tool-topbar{min-height:54px;padding:0 12px}.tool-actions{gap:6px}.fullscreen-btn{gap:5px;height:32px;padding:0 9px;font-size:11px}.fullscreen-btn svg{width:13px;height:13px}.tool-controls{gap:12px;padding:12px}.edge-option span{min-width:0;font-size:11px}.calibration-brief{padding:10px 12px}.calibration-status strong{font-size:11px}.calibration-status small{font-size:9px}.button-small{min-height:34px}.ruler-stage{height:300px;min-height:300px}.ruler-horizontal{height:40px}.ruler-vertical{width:40px}.ruler-vertical .tick-label{left:18px}.ruler-right .tick-label{right:18px}.tick-label{top:20px}.ruler-bottom .tick-label{bottom:18px}.stage-center{inset:40px}.stage-center>p{max-width:220px;padding-inline:8px}.tool-footnote{padding:0 12px;font-size:9px}.tool-footnote button{white-space:nowrap;font-size:9px}.calibration-section{padding:44px 12px 36px}.section-intro{margin-bottom:20px;padding-inline:6px}.section-intro h2{font-size:28px}.section-intro>p:last-child{font-size:12px}.method-grid{grid-template-columns:1fr;gap:10px}.method-card{min-height:auto;padding:16px}.method-card h3{margin-top:12px}.method-card p{min-height:0}.method-link{margin-top:10px}.trust-band{gap:10px;padding:18px 12px}.trust-band p{font-size:10px}.privacy-note{padding:16px 12px}.site-footer{padding:20px 12px 18px}.dialog-header{padding:18px 16px 0}.dialog-description{margin:9px 16px 14px}.calibration-tabs{margin-inline:16px}.calibration-panel,.calibration-note,.dialog-privacy{padding-inline:16px}.page-hero{padding:40px 14px 28px}.page-main{padding:28px 14px 56px}.about-features-grid{grid-template-columns:1fr;gap:12px}.about-panel,.contact-card{padding:20px 14px}.legal-highlights{grid-template-columns:1fr;gap:10px}.error-destinations-grid{grid-template-columns:1fr;gap:12px}.error-hero{padding:40px 14px 32px}.error-actions{flex-direction:column;width:100%}.error-actions .button{justify-content:center;width:100%}.troubleshoot-box{padding:20px 14px}.home-guide-section{padding:44px 12px 36px}.guide-header-content h2{font-size:26px}.guide-subtitle{margin-top:10px;font-size:13px}.guide-card{gap:14px;padding:16px 14px}.guide-card-icon{width:34px;height:34px}.guide-card-icon svg,.guide-card-icon img{width:17px;height:17px}.guide-card-body h3{font-size:15px}.guide-card-body p{font-size:13px}.guide-summary-banner{padding:16px 14px}.guide-summary-text h4{font-size:14px}.guide-summary-list{padding-left:18px;font-size:12.5px}.home-faq-section{padding:44px 12px 36px}.faq-header-content h2{font-size:26px}.faq-subtitle{margin-top:10px;font-size:13px}.faq-question-title{font-size:13.5px}.faq-accordion-summary{gap:10px;padding:14px 12px}.faq-question-meta{gap:10px}.faq-question-number{min-width:24px;height:22px;padding:0 5px;font-size:10px}.faq-chevron{width:24px;height:24px}.faq-chevron svg{width:12px;height:12px}.faq-accordion-content{padding:12px 12px 16px;font-size:13px}.faq-step-item{gap:10px;padding:10px 12px;font-size:12.5px}.faq-tip-box{padding:10px 12px;font-size:12px}.faq-comparison-card{padding:12px}}@media(max-width:480px){.calibration-dialog{border-radius:14px;width:min(520px,100vw - 16px);max-height:min(92dvh,760px)}.dialog-header{padding:16px 16px 0}.dialog-header h2{font-size:18px}.dialog-description{margin:6px 16px 14px;font-size:12px}.calibration-tabs{gap:3px;margin:0 16px 16px;padding:3px}.calibration-tabs button{min-height:32px;padding:0 2px;font-size:11.5px}.tab-label-full{display:none}.tab-label-short{display:inline}.calibration-panel{padding:0 16px 16px}.panel-header-wrap{gap:10px;margin-bottom:12px}.panel-symbol{width:28px;height:28px;font-size:13px}.panel-title-block h3{font-size:13.5px}.panel-title-block p{font-size:11.5px}.slider-with-controls{gap:6px}.stepper-group{gap:3px}.stepper-btn{min-width:28px;height:32px;padding:0 4px;font-size:11px}.card-guide-wrap{min-height:130px;padding:12px 10px}.dialog-submit{min-height:40px;margin-top:14px;font-size:12.5px}.calibration-note{padding:10px 16px;font-size:10.5px}.dialog-privacy{padding:8px 16px 14px;font-size:10px}}@media(max-width:360px){.calibration-dialog{border-radius:12px;width:calc(100vw - 10px)}.stepper-btn[data-step-card="-5"],.stepper-btn[data-step-card="5"]{display:none}.stepper-btn{min-width:26px;padding:0 3px}}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.language-switcher-wrap{align-items:center;display:inline-flex;position:relative}.language-select{appearance:none;background:var(--bg-elevated);border:1px solid var(--border-default);color:var(--text-primary);cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23737373' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-position:right 8px center;background-repeat:no-repeat;background-size:12px;border-radius:8px;padding:6px 28px 6px 10px;font-size:13px;font-weight:500;transition:border-color .2s,box-shadow .2s}.language-select:hover{border-color:var(--text-muted)}.language-select:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #0070f326}.mobile-language-switcher{border-bottom:1px solid var(--border-subtle);align-items:center;gap:10px;padding:16px 20px;display:flex}.mobile-language-switcher label{color:var(--text-secondary);white-space:nowrap;font-size:13px;font-weight:600}html[dir=rtl] body{text-align:right;direction:rtl}html[dir=rtl] .site-header,html[dir=rtl] .header-nav,html[dir=rtl] .hero-actions,html[dir=rtl] .hero-features-bar,html[dir=rtl] .tool-topbar,html[dir=rtl] .tool-controls{flex-direction:row-reverse}html[dir=rtl] .method-grid,html[dir=rtl] .guide-grid{direction:rtl}html[dir=rtl] .faq-accordion-item summary{flex-direction:row-reverse}html[dir=rtl] .mobile-nav-drawer{left:0;right:auto;transform:translate(-100%)}html[dir=rtl] .mobile-nav-drawer.is-open{transform:translate(0)}html[dir=rtl] .site-footer,html[dir=rtl] .dialog-header,html[dir=rtl] .calibration-tabs{flex-direction:row-reverse}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}