:root{--bg:#f5f7fa;--surface:#fff;--surface-soft:#f8fafc;--text:#101828;--text-muted:#667085;--border:#e4e7ec;--border-dark:#d0d5dd;--primary:#111827;--primary-hover:#000;--success:#12b76a;--success-soft:#ecfdf3;--max-width:1120px;--radius:20px;--shadow:0 18px 50px #10182814;--shadow-soft:0 8px 30px #1018280f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);min-width:320px;color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img,svg{max-width:100%;display:block}.container{width:min(100% - 40px, var(--max-width));margin-inline:auto}.site-header{border-bottom:1px solid var(--border);backdrop-filter:blur(14px);z-index:20;background:#fffffff0;width:100%;position:relative}.header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:72px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:11px;font-weight:750;display:inline-flex}.brand-mark{background:var(--primary);color:#fff;border-radius:11px;place-items:center;width:38px;height:38px;font-size:21px;font-weight:700;display:grid}.brand-name{font-size:17px}.main-nav{color:var(--text-muted);align-items:center;gap:28px;font-size:14px;font-weight:550;display:flex}.main-nav a{transition:color .2s}.main-nav a:hover{color:var(--text)}.tool-badge{border:1px solid var(--border);color:#475467;letter-spacing:.08em;background:#fff;border-radius:999px;align-items:center;gap:7px;padding:6px 10px;font-size:11px;font-weight:750;display:inline-flex}.eyebrow{color:#475467;letter-spacing:.06em;text-transform:uppercase;margin:0;font-size:13px;font-weight:700}h1,h2,h3,p{margin-top:0}.primary-button{background:var(--primary);color:#fff;border:0;border-radius:11px;justify-content:center;align-items:center;gap:12px;min-height:46px;padding:0 20px;font-size:14px;font-weight:700;transition:transform .2s,background .2s,box-shadow .2s;display:inline-flex}.primary-button:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 8px 22px #1118272e}.large-button{min-height:52px;padding:0 23px;font-size:15px}.secondary-button{border:1px solid var(--border-dark);min-height:46px;color:var(--text);background:#fff;border-radius:10px;padding:0 18px;font-weight:650;transition:background .2s,transform .2s}.secondary-button:hover{background:var(--surface-soft);transform:translateY(-1px)}.secondary-button-muted{color:var(--text-muted)}.text-button{color:var(--text-muted);background:0 0;border:0;padding:5px;font-size:13px;font-weight:600}.text-button:hover{color:var(--text)}.home-hero{background:radial-gradient(circle at 78% 30%,#1118270e,#0000 34%),#f8fafc;padding:82px 0 90px;overflow:hidden}.home-hero-grid{grid-template-columns:.95fr 1.05fr;align-items:center;gap:70px;display:grid}.home-hero-content h1{letter-spacing:-.055em;max-width:590px;margin:18px 0 22px;font-size:clamp(42px,5vw,68px);line-height:1.02}.home-hero-content h1 span{color:#667085;display:block}.hero-description{max-width:540px;color:var(--text-muted);margin-bottom:30px;font-size:18px;line-height:1.7}.hero-actions{gap:12px;display:flex}.hero-trust{color:var(--text-muted);flex-wrap:wrap;gap:18px;margin-top:20px;font-size:13px;display:flex}.hero-device-preview{perspective:1000px;justify-content:center;display:flex}.preview-card{border:1px solid var(--border);width:min(100%,500px);box-shadow:var(--shadow);background:#fff;border-radius:28px;padding:28px}.preview-top{color:var(--text-muted);letter-spacing:.08em;justify-content:space-between;align-items:center;font-size:11px;font-weight:800;display:flex}.preview-live{color:var(--success);align-items:center;gap:6px;display:inline-flex}.preview-live i{background:var(--success);border-radius:50%;width:7px;height:7px;animation:1.5s infinite pulse}.preview-angle{justify-content:center;align-items:baseline;margin:18px 0 0;display:flex}.preview-angle strong{letter-spacing:-.06em;font-size:68px;line-height:1}.preview-angle span{margin-left:5px;font-size:28px;font-weight:700}.preview-protractor{height:260px;margin-top:10px;position:relative;overflow:hidden}.preview-arc{border:2px solid #d0d5dd;border-bottom:0;border-radius:330px 330px 0 0;width:330px;height:165px;position:absolute;bottom:20px;left:50%;transform:translate(-50%)}.preview-surface{background:#101828;border-radius:3px;height:3px;position:absolute;bottom:20px;left:7%;right:7%}.preview-phone{transform-origin:50% 100%;background:#111827;border-radius:9px;width:190px;height:34px;animation:4s ease-in-out infinite phoneTilt;position:absolute;bottom:21px;left:50%;transform:translate(-50%)rotate(-32deg);box-shadow:0 9px 20px #10182833}.preview-phone-screen{color:#fff;background:#273142;border-radius:5px;place-items:center;font-size:10px;font-weight:700;display:grid;position:absolute;inset:5px 12px}.preview-needle{transform-origin:bottom;background:#111827;width:2px;height:110px;animation:4s ease-in-out infinite needleTilt;position:absolute;bottom:36px;left:50%;transform:translate(-50%)rotate(32deg)}.preview-center{z-index:3;background:#111827;border-radius:50%;width:10px;height:10px;position:absolute;bottom:17px;left:50%;transform:translate(-50%)}.preview-tick{transform-origin:bottom;background:#98a2b3;width:2px;height:12px;position:absolute;bottom:20px;left:50%}.tick-1{transform:translate(-50%)rotate(-60deg)}.tick-2{transform:translate(-50%)rotate(-30deg)}.tick-3{height:18px;transform:translate(-50%)}.tick-4{transform:translate(-50%)rotate(30deg)}.tick-5{transform:translate(-50%)rotate(60deg)}.preview-scale{color:#98a2b3;justify-content:space-between;padding:0 18px;font-size:11px;font-weight:650;display:flex}.preview-hint{border-top:1px solid var(--border);color:var(--text-muted);justify-content:center;align-items:center;gap:8px;margin-top:22px;padding-top:17px;font-size:13px;display:flex}.preview-hint span{font-size:17px}.how-it-works{background:#fff;padding:90px 0}.section-heading{margin-bottom:38px}.section-heading.centered{text-align:center;max-width:680px;margin-inline:auto}.section-heading h2{letter-spacing:-.04em;margin:14px 0 8px;font-size:34px}.section-heading p{color:var(--text-muted)}.steps-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.step-card{border:1px solid var(--border);background:#fff;border-radius:18px;padding:28px}.step-number{color:#98a2b3;letter-spacing:.08em;margin-bottom:28px;font-size:12px;font-weight:800}.step-card h3{margin-bottom:8px;font-size:18px}.step-card p{color:var(--text-muted);margin:0;font-size:14px}.tool-page{padding:55px 0 80px}.tool-heading{text-align:center;max-width:720px;margin:0 auto 30px}.tool-heading h1{letter-spacing:-.05em;margin:15px 0 10px;font-size:clamp(38px,5vw,52px);line-height:1.05}.tool-heading p{color:var(--text-muted);margin:0;font-size:17px}.angle-tool{border:1px solid var(--border);max-width:850px;box-shadow:var(--shadow);background:#fff;border-radius:26px;margin:0 auto;overflow:hidden}.angle-tool-active{padding:30px}.sensor-permission{grid-template-columns:.95fr 1.05fr;align-items:center;gap:45px;min-height:560px;padding:45px;display:grid}.permission-content h2{letter-spacing:-.04em;margin:15px 0 10px;font-size:32px;line-height:1.1}.permission-content p{max-width:440px;color:var(--text-muted);margin-bottom:24px}.permission-note{margin:12px 0 0!important;font-size:12px!important}.permission-visual{background:#f8fafc;border-radius:22px;min-height:280px;position:relative;overflow:hidden}.permission-phone{background:#111827;border-radius:12px;width:190px;height:52px;animation:3.5s ease-in-out infinite permissionTilt;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-18deg);box-shadow:0 20px 30px #10182826}.permission-screen{color:#fff;background:#273142;border-radius:6px;place-items:center;font-size:14px;font-weight:700;display:grid;position:absolute;inset:7px 14px}.permission-surface{background:#98a2b3;border-radius:3px;height:3px;position:absolute;bottom:60px;left:10%;right:10%}.permission-arrow{color:#667085;font-size:25px;position:absolute;bottom:84px;left:50%;transform:translate(-50%)}.text-button.mode-switch{margin:17px auto 0;display:block}.tool-live-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:20px;padding-bottom:24px;display:flex}.tool-live-header h2{letter-spacing:-.03em;margin:8px 0 0;font-size:22px}.live-status{background:var(--success-soft);color:#067647;border:1px solid #abefc6;border-radius:999px;align-items:center;gap:8px;padding:7px 11px;font-size:12px;font-weight:700;display:inline-flex}.status-dot{background:var(--success);border-radius:50%;width:7px;height:7px;animation:1.5s infinite pulse}.angle-display{text-align:center;padding:28px 0 8px}.angle-display-top{justify-content:center;align-items:center;gap:10px;display:flex}.measurement-label{color:#667085;letter-spacing:.09em;font-size:11px;font-weight:800}.measurement-status{color:#667085;background:#f2f4f7;border-radius:999px;padding:3px 8px;font-size:10px;font-weight:700}.angle-value{letter-spacing:-.07em;margin-top:8px;font-size:clamp(58px,9vw,82px);font-weight:800;line-height:1}.angle-value span{color:#667085;vertical-align:middle;margin-left:5px;font-size:.42em}.angle-direction{color:#475467;margin-top:5px;font-size:14px;font-weight:650}.angle-help{color:var(--text-muted);margin:10px auto 0;font-size:13px}.angle-gauge{margin:8px auto 0}.gauge-visual{flex-direction:column;align-items:center;width:100%;display:flex}.tilt-dial{background:radial-gradient(circle,#fff 0% 58%,#f8fafc 100%);border-radius:50%;width:330px;height:330px;margin:4px auto 0;position:relative}.dial-ring{border:2px solid #d0d5dd;border-radius:50%;position:absolute;inset:10px}.dial-inner-ring{border:1px solid #eaecf0;border-radius:50%;position:absolute;inset:42px}.dial-ticks{position:absolute;inset:0}.dial-tick{transform-origin:0 0;background:#c4c9d1;border-radius:2px;width:2px;height:9px;position:absolute;top:50%;left:50%}.dial-tick:after{content:"";background:#c4c9d1;border-radius:2px;width:2px;height:9px;position:absolute;top:-142px;left:-1px}.dial-tick-major:after{background:#667085;width:3px;height:15px}.dial-label{z-index:3;color:#667085;font-size:12px;font-weight:750;position:absolute}.dial-label-left{top:50%;left:25px;transform:translateY(-50%)}.dial-label-left-mid{top:68px;left:68px}.dial-label-center{color:#101828;font-size:13px;top:30px;left:50%;transform:translate(-50%)}.dial-label-right-mid{top:68px;right:68px}.dial-label-right{top:50%;right:25px;transform:translateY(-50%)}.measurement-arm{z-index:5;transform-origin:50% 100%;width:4px;height:142px;transition:transform .12s linear;position:absolute;top:50%;left:50%}.measurement-line{background:#111827;border-radius:999px;width:4px;height:128px;position:absolute;bottom:0;left:50%;transform:translate(-50%);box-shadow:0 3px 10px #10182824}.measurement-line:before{content:"";border-top:3px solid #111827;border-right:3px solid #111827;width:13px;height:13px;position:absolute;top:-7px;left:50%;transform:translate(-50%)rotate(-45deg)}.device-indicator{background:#111827;border-radius:8px;width:58px;height:30px;padding:4px;position:absolute;bottom:112px;left:50%;transform:translate(-50%);box-shadow:0 8px 18px #10182833,0 0 0 3px #1118270a}.device-screen{color:#fff;background:#273142;border-radius:4px;place-items:center;width:100%;height:100%;font-size:8px;font-weight:800;display:grid}.dial-center{z-index:8;background:#111827;border:3px solid #fff;border-radius:50%;place-items:center;width:22px;height:22px;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 3px 10px #10182833,0 0 0 1px #d0d5dd}.dial-center-dot{background:#fff;border-radius:50%;width:5px;height:5px}.gauge-scale-row{color:#98a2b3;justify-content:space-between;width:min(330px,100%);margin-top:-5px;padding:0 8px;font-size:11px;font-weight:700;display:flex}.gauge-caption{color:var(--text-muted);text-align:center;align-items:center;gap:7px;margin-top:15px;font-size:12px;display:inline-flex}.gauge-caption-dot{background:#98a2b3;border-radius:50%;flex:none;width:6px;height:6px}.measurement-instruction{border:1px solid var(--border);background:var(--surface-soft);border-radius:13px;align-items:center;gap:13px;max-width:580px;margin:24px auto 0;padding:14px 16px;display:flex}.instruction-icon{background:#fff;border-radius:10px;flex:none;place-items:center;width:38px;height:38px;font-size:20px;display:grid}.measurement-instruction strong,.measurement-instruction span{display:block}.measurement-instruction strong{font-size:13px}.measurement-instruction span{color:var(--text-muted);margin-top:2px;font-size:12px}.calibration-controls{justify-content:center;gap:10px;margin-top:18px;display:flex}.manual-angle{border:1px solid var(--border);background:var(--surface-soft);border-radius:16px;max-width:570px;margin:25px auto 0;padding:20px}.manual-angle-header{justify-content:space-between;align-items:center;gap:20px;display:flex}.manual-angle-header h3{margin:5px 0 0;font-size:17px}.manual-range{color:var(--text-muted);font-size:12px}.manual-angle-row{justify-content:center;align-items:center;gap:12px;margin-top:17px;display:flex}.angle-step-button{border:1px solid var(--border-dark);background:#fff;border-radius:10px;width:46px;height:46px;font-size:20px}.angle-step-button:hover{background:#f2f4f7}.manual-input-wrap{border:1px solid var(--border-dark);background:#fff;border-radius:11px;align-items:center;width:150px;height:50px;padding:0 14px;display:flex}.manual-input-wrap input{text-align:center;background:0 0;border:0;outline:0;width:100%;font-size:22px;font-weight:700}.manual-input-wrap span{color:var(--text-muted);font-weight:700}.manual-help{color:var(--text-muted);text-align:center;margin:10px 0 0;font-size:12px}.tool-explanation{border-top:1px solid var(--border);max-width:850px;margin:60px auto 0;padding-top:40px}.tool-explanation h2{letter-spacing:-.03em;margin-bottom:25px;font-size:27px}.explanation-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.explanation-grid>div{border:1px solid var(--border);background:#fff;border-radius:15px;padding:20px}.explanation-grid strong{margin-bottom:7px;font-size:14px;display:block}.explanation-grid p,.explanation-intro{color:var(--text-muted);margin:0;font-size:14px}.site-footer{border-top:1px solid var(--border);background:#fff;margin-top:0}.footer-inner{padding:48px 0 24px}.footer-brand{max-width:440px}.footer-title{font-size:18px;font-weight:700}.footer-brand p{color:var(--text-muted);margin:8px 0 0;font-size:14px}.footer-nav{color:var(--text-muted);flex-wrap:wrap;gap:20px;margin-top:28px;font-size:14px;display:flex}.footer-nav a:hover{color:var(--text)}.footer-bottom{border-top:1px solid var(--border);color:var(--text-muted);justify-content:space-between;gap:20px;margin-top:36px;padding-top:20px;font-size:13px;display:flex}.content-page{padding:70px 0}.content-container{max-width:780px}.content-container h1{letter-spacing:-.05em;margin:14px 0 22px;font-size:46px}.content-container h2{margin-top:38px;font-size:25px}.content-container p{color:var(--text-muted)}.contact-note{font-size:13px}.error-page{text-align:center;place-items:center;min-height:60vh;display:grid}.error-code{letter-spacing:-.08em;font-size:90px;font-weight:850;line-height:1}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.75)}}@keyframes phoneTilt{0%,to{transform:translate(-50%)rotate(-26deg)}50%{transform:translate(-50%)rotate(-38deg)}}@keyframes needleTilt{0%,to{transform:translate(-50%)rotate(26deg)}50%{transform:translate(-50%)rotate(38deg)}}@keyframes permissionTilt{0%,to{transform:translate(-50%,-50%)rotate(-14deg)}50%{transform:translate(-50%,-50%)rotate(-27deg)}}@media (width<=850px){.container{width:min(100% - 28px, var(--max-width))}.home-hero{padding:55px 0 60px}.home-hero-grid{grid-template-columns:1fr;gap:45px}.home-hero-content{text-align:center}.home-hero-content h1{font-size:clamp(40px,11vw,58px)}.hero-description{margin-inline:auto}.hero-actions,.hero-trust{justify-content:center}.steps-grid,.explanation-grid{grid-template-columns:1fr}.sensor-permission{grid-template-columns:1fr;padding:28px}.permission-visual{min-height:220px}.angle-tool-active{padding:20px}}@media (width<=600px){.main-nav{display:none}.header-inner{min-height:64px}.tool-page{padding:38px 0 55px}.tool-heading h1{font-size:39px}.tool-heading p{font-size:15px}.preview-card{border-radius:20px;padding:20px}.preview-angle strong{font-size:55px}.preview-protractor{height:220px}.preview-arc{width:290px;height:145px}.preview-phone{width:155px}.sensor-permission{min-height:0;padding:20px}.permission-content h2{font-size:27px}.tool-live-header{flex-direction:column;align-items:flex-start}.angle-display{padding-top:22px}.angle-value{font-size:64px}.tilt-dial{width:280px;height:280px}.dial-inner-ring{inset:36px}.dial-tick:after{top:-119px}.measurement-arm{height:120px}.measurement-line{height:108px}.device-indicator{bottom:94px}.dial-label-left{left:19px}.dial-label-right{right:19px}.dial-label-left-mid{top:57px;left:57px}.dial-label-right-mid{top:57px;right:57px}.dial-label-center{top:25px}.gauge-scale-row{width:280px;padding-inline:4px;font-size:10px}.gauge-caption{justify-content:center;max-width:280px;font-size:11px}.measurement-instruction{align-items:flex-start}.calibration-controls{flex-direction:column}.calibration-controls button{width:100%}.manual-angle-header{flex-direction:column;align-items:flex-start;gap:8px}.footer-bottom{flex-direction:column;gap:7px}.content-container h1{font-size:38px}}