:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#25332d;background:#f5f5ee;font-synthesis:none}*{box-sizing:border-box}body{margin:0}header,footer{max-width:1100px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:15px 32px}header{border-bottom:1px solid #dcdfd5}.brand{font-weight:650;font-size:19px;letter-spacing:-.6px;text-decoration:none;display:flex;align-items:center;gap:10px}.mark{background:#284f3d;color:#eff5c9;border-radius:10px;width:34px;height:34px;text-align:center;font-size:25px;line-height:30px}a{color:inherit}.nav{font-size:13px;text-decoration:none}main{max-width:920px;margin:0 auto;padding:20px 32px 24px}.intro{text-align:left;max-width:740px;margin:0 auto 18px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:650;display:flex;justify-content:center;align-items:center;gap:9px}.dot{width:7px;height:7px;border-radius:50%;background:#628362}h1{font-size:clamp(20px,3vw,27px);font-weight:550;line-height:1.3;letter-spacing:-.7px;margin:0 0 6px}h1 span{color:#7a8871}.lead{color:#657067;font-size:13px;line-height:1.5;margin:0}.card{background:#fff;border:1px solid #dce1d5;border-radius:18px;padding:22px;max-width:740px;margin:auto;box-shadow:0 10px 35px #273d2910}.card-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e8ebe3;padding-bottom:12px;margin-bottom:16px;font-size:10px;font-weight:650;letter-spacing:1.5px;color:#64705e}.badge{background:#eff3e9;border-radius:30px;padding:7px 11px;letter-spacing:0;color:#4c6641;font-size:11px}label{display:block;font-size:13px;font-weight:600;margin-bottom:10px}textarea,input,select,button{font:inherit}textarea,input,select{border:1px solid #dce1d6;border-radius:8px;background:#fcfcf9;color:#27392b;padding:12px;width:100%;font-size:14px}textarea{height:clamp(120px,21vh,170px);min-height:120px;resize:vertical;line-height:1.6}textarea::placeholder,input::placeholder{color:#90978c}input[readonly]{font-size:12px}button{cursor:pointer;border:1px solid #cbd3c4;background:#f3f5ed;color:#294c35;border-radius:8px;padding:12px 16px;font-size:13px;font-weight:600}button:disabled{opacity:.55;cursor:wait}.primary{background:#294f3e;color:#fff;border:0;width:100%;padding:16px;display:flex;justify-content:space-between;align-items:center;margin-top:16px;font-size:14px}.primary:hover{background:#1c3d2c}.primary span{color:#d9ec99;font-size:21px;line-height:1}.below{display:flex;justify-content:space-between;font-size:10px;color:#7a8276;margin-top:8px}.settings{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.muted{font-weight:400;color:#89907f;font-size:11px;margin-left:5px}.hint,.footnote{color:#727d6b;font-size:11px;line-height:1.6}.hint{margin:8px 0 10px}.footnote{text-align:center;margin:10px 0 0}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin:38px auto 36px;max-width:740px}.principles span{font-size:10px;color:#859475;letter-spacing:1px}.principles h3{font-size:13px;margin:10px 0}.principles p{font-size:12px;color:#73806f;line-height:1.6;margin:0}details{max-width:740px;margin:auto;border-top:1px solid #dce1d5;padding-top:20px;font-size:12px;color:#62715e;line-height:1.7}summary{cursor:pointer;color:#3e533d;font-weight:600}footer{font-size:10px;color:#85907d;border-top:1px solid #dce1d5;margin-top:25px}h2{font-size:24px;font-weight:550;letter-spacing:-.7px}section>p{line-height:1.6;font-size:14px}.copy-row{display:flex;gap:8px;margin-bottom:8px}.copy-row input{min-width:0}.text-link{display:inline-block;margin-top:12px;font-size:13px}#status:empty{display:none}#status{font-size:13px;margin-top:18px;color:#71471e}pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:500px;overflow:auto;background:#f2f5ed;padding:20px;border-radius:8px;font-size:15px;line-height:1.7}*:focus-visible{outline:3px solid #8aa96c;outline-offset:3px}[hidden]{display:none!important}@media(max-width:600px){header,footer{padding:12px 16px}.nav{font-size:11px}main{padding:16px 12px 24px}h1{letter-spacing:-.5px}.lead{font-size:12px}.card{padding:16px}.settings{grid-template-columns:1fr;gap:12px;margin-top:14px}.principles{gap:15px}.principles h3{font-size:12px}.principles p{font-size:11px}.desktop{display:none}.badge{font-size:10px}.card-top{font-size:9px;letter-spacing:.8px}footer{gap:20px}.below{font-size:9px}}

@media(max-height:720px) and (min-width:601px){textarea{height:120px}.card{padding:18px 22px}.settings{margin-top:12px}.primary{padding:13px;margin-top:12px}.card-top{margin-bottom:12px}}

.site-nav{display:flex;align-items:center;gap:24px}.site-nav a{display:inline-flex;align-items:center;min-height:36px}.site-nav a:hover{text-decoration:underline;text-underline-offset:4px}
.support-project{max-width:740px;margin:36px auto;padding:28px;border:1px solid #cdd9bf;border-radius:18px;background:#edf2e5;scroll-margin-top:24px}.support-project h2{font-size:26px;margin:12px 0}.support-intro{color:#52634b;margin:0;max-width:580px}.donation-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:24px}.donation-option{min-width:0;padding:18px;border:1px solid #d4dfca;border-radius:12px;background:#fffef9}.donation-heading{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px}.donation-heading h3{font-size:15px;margin:0}.donation-heading h3 span{font-size:11px;font-weight:500;color:#617057;margin-left:5px}.donation-copy{margin-left:auto;min-height:44px;padding:8px 12px;font-size:12px}.donation-copy:hover{background:#e6eddc}.donation-label{font-size:11px;color:#617057;margin:18px 0 8px}.donation-address{display:block;padding:12px;border:1px dashed #c6d3bb;border-radius:8px;background:#f7f9f2;font:12px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;color:#57694c;overflow-wrap:anywhere;user-select:all}.support-project .donation-status{font-size:12px;color:#36533c;margin:14px 0 0;min-height:1.6em}.support-project .support-thanks{font-size:12px;color:#36533c;border-top:1px solid #d1dcc6;padding-top:16px;margin:18px 0 0}
@media(max-width:600px){.donation-options{grid-template-columns:1fr}.support-project{padding:20px;margin-top:28px}.support-project h2{font-size:23px}.donation-option{padding:16px}.site-nav{gap:16px}}@media(max-width:480px){header{flex-wrap:wrap;gap:4px}.site-nav{width:100%;justify-content:space-between}}
.once-notice{margin:0 0 18px;padding:14px 16px;border:1px solid #dfc79e;border-left:4px solid #a17835;border-radius:10px;background:#fff8eb;color:#625031}.once-notice strong{display:block;font-size:14px;line-height:1.5;color:#60451e}.once-notice p{margin:6px 0 0;font-size:13px;line-height:1.65}
.prepared-file{margin:14px 0 4px;padding:14px 16px;border:1px solid #c9d9bb;border-radius:10px;background:#f2f7ed;overflow-wrap:anywhere}.prepared-file strong{display:block;font-size:12px;color:#335a3c}.prepared-file p{font-size:12px;line-height:1.6;margin:5px 0}.prepared-file[data-state="error"]{background:#fff8ef;border-color:#dfc19c}.prepared-file[data-state="error"] strong{color:#71471e}.prepared-file[data-state="preparing"]{background:#f7f8f3}.send-progress{display:flex;flex-wrap:wrap;gap:8px 18px;margin:16px 0 0;padding:0;list-style:none;font-size:11px;color:#697763}.send-progress li{padding:5px 0;border-bottom:2px solid #e2e7dc}.send-progress .is-current{color:#294f3e;border-color:#294f3e;font-weight:650}.send-progress .is-done:before{content:'✓ ';color:#355f40}
.flow-mobile{display:none}.flow-full{border:0;padding:0;max-width:none}.flow-full>summary{display:none}@media(max-width:600px){.flow-mobile{display:grid;gap:12px;list-style:none;padding:0;margin:20px 0}.flow-mobile li{border-left:3px solid #d7e1cd;padding:12px 14px;background:#fff;border-radius:0 10px 10px 0}.flow-mobile li.is-active{border-color:#355f40;background:#edf4e5}.flow-mobile button{padding:0;border:0;background:transparent;text-align:left;font-size:13px;line-height:1.6;min-height:44px}.flow-mobile p{font-size:12px;line-height:1.7;margin:6px 0 0}.flow-full>summary{display:list-item;padding:12px 0}.flow-status{overflow-wrap:anywhere}}@media print{.flow-mobile{display:none}}
/* Encryption explainer. The SVG is derived from the checked Archify sequence. */
.encryption-story{max-width:740px;margin:38px auto 0;border-top:1px solid #dce1d5;padding-top:32px}.story-kicker{font-size:10px;font-weight:650;letter-spacing:1.5px;color:#64705e}.story-heading h2{font-size:26px;margin:12px 0 8px}.story-heading>p{font-size:13px;color:#657067;line-height:1.6;margin:0 0 24px}.crypto-journey{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;padding:0}.crypto-journey li{position:relative;background:#fff;border:1px solid #dce1d5;border-radius:14px;padding:20px 17px;display:flex;flex-direction:column}.crypto-journey li+li:before{content:'→';position:absolute;left:-14px;top:29px;background:#f5f5ee;color:#537653;border-radius:50%;width:16px;text-align:center;z-index:1}.journey-number{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:#eaf0df;color:#355c40;font-size:12px;margin-bottom:18px}.journey-location{font-size:9px;letter-spacing:1px;color:#63745b;font-weight:650}.crypto-journey h3{font-size:15px;line-height:1.4;margin:9px 0}.crypto-journey p{font-size:12px;line-height:1.7;color:#66745f;margin:0 0 18px}.journey-tag{font-size:10px;color:#39593b;border-top:1px solid #e9eddf;padding-top:12px;margin-top:auto}.secret-note{display:flex;gap:15px;margin:20px 0;padding:16px 18px;background:#edf1e4;border-radius:10px}.secret-note>span{font-size:29px;line-height:1.3;color:#789464}.secret-note p{margin:0;font-size:12px;line-height:1.7;color:#586951}.secret-note strong{color:#314e38}.flow-details{padding:18px 0;border-bottom:1px solid #dce1d5}.flow-details>summary{font-size:13px}.flow-details>summary span{float:right;font-size:10px;color:#74826c;font-weight:400}.sequence-figure{margin:20px 0}.sequence-scroll{overflow-x:auto;border:1px solid #dce1d5;border-radius:12px;background:#fff}.encryption-sequence{display:block;width:100%;min-width:740px;height:auto;font-family:ui-sans-serif,system-ui,sans-serif}.sequence-figure figcaption{font-size:11px;line-height:1.6;color:#6b7863;margin-top:10px}.flow-explanations{padding-left:25px;margin:22px 0 0}.flow-explanations li{padding-left:8px;margin-bottom:20px}.flow-explanations li::marker{color:#66815a;font-weight:650}.flow-explanations h3{font-size:13px;color:#334d37;margin:0 0 5px}.flow-explanations p{margin:0;font-size:12px;line-height:1.8}.story-limit{font-size:11px!important;color:#74806d;margin:18px 0 0;line-height:1.8!important}
.encryption-sequence .c-grid{stroke:none;fill:none}.encryption-sequence .c-mask{fill:#fff;stroke:none}.encryption-sequence .c-lane{fill:#f7f9f3;stroke:#dce4d4;stroke-dasharray:6,6}.encryption-sequence .c-frontend{fill:#edf4e5;stroke:#678759}.encryption-sequence .c-backend{fill:#f2f1e9;stroke:#93895c}.encryption-sequence .c-security{fill:#edf4ef;stroke:#48735c}.encryption-sequence .t-primary{fill:#294432}.encryption-sequence .t-muted{fill:#546b4d}.encryption-sequence .t-dim{fill:#697c60}.encryption-sequence .a-default{stroke:#71846a;fill:none}.encryption-sequence .a-emphasis{stroke:#355f40;fill:none}.encryption-sequence .a-security{stroke:#48735c;fill:none}.encryption-sequence .m-default{fill:#71846a}.encryption-sequence .m-emphasis{fill:#355f40}.encryption-sequence .m-security{fill:#48735c}.encryption-sequence .semantic-sigil{fill:none;stroke:#53714a;stroke-width:1.4}.encryption-sequence .sigil-fill{fill:#53714a;stroke:none}
@media(max-width:600px){.encryption-story{margin-top:30px;padding-top:25px}.story-heading h2{font-size:23px}.crypto-journey{grid-template-columns:1fr;gap:14px}.crypto-journey li{padding:18px 18px 18px 66px}.journey-number{position:absolute;left:18px;top:18px}.crypto-journey li+li:before{content:'↓';left:24px;top:-16px}.crypto-journey p{margin-bottom:12px}.journey-tag{padding-top:10px}.flow-details>summary span{display:none}}

.flow-controls{margin-top:20px;padding:16px;border:1px solid #dce1d5;border-radius:12px;background:#fff}.flow-buttons{display:flex;gap:8px;flex-wrap:wrap}.flow-buttons button{padding:9px 14px}.flow-buttons [data-flow="play"]{background:#294f3e;color:#fff;min-width:78px}.flow-buttons button:disabled{cursor:default}.flow-status{min-height:3.4em;font-size:12px;line-height:1.7;margin:14px 0 8px;color:#334d37}.flow-disclaimer,.motion-note{font-size:11px;line-height:1.6;color:#66745f;margin:8px 0 0}.encryption-sequence .flow-step.is-active>path{stroke:#234d32;stroke-width:2.4}.encryption-sequence .flow-step.is-active .c-mask{fill:#dfeccb}.encryption-sequence .flow-step.is-active text{fill:#203e2a;font-weight:700}.encryption-sequence .flow-dot{fill:#294f3e;stroke:#fff;stroke-width:1.5;visibility:hidden;pointer-events:none}.encryption-sequence .flow-dot.is-visible{visibility:visible}@media(prefers-reduced-motion:reduce){.encryption-sequence .flow-dot{display:none}}@media print{.flow-controls,.flow-dot{display:none!important}.encryption-sequence .flow-step.is-active>path{stroke-width:1.4}.encryption-sequence .flow-step.is-active .c-mask{fill:#fff}}

.encryption-sequence .flow-step{cursor:help;outline:none}.encryption-sequence .flow-step:hover .c-mask,.encryption-sequence .flow-step:focus-visible .c-mask{fill:#e4edda;stroke:#557247;stroke-width:1}.encryption-sequence .flow-hit{fill:transparent;stroke:none;pointer-events:all}.flow-tooltip{position:fixed;z-index:20;width:min(320px,calc(100vw - 24px));padding:14px 16px;border:1px solid #bdcdb0;border-radius:10px;background:#fffef8;color:#344b36;box-shadow:0 6px 24px #273d2926;font-size:12px;line-height:1.65}.flow-tooltip strong{display:block;margin-bottom:5px;font-size:12px}.flow-tooltip p{margin:0}@media print{.flow-tooltip{display:none!important}}

.attachment-picker{margin-top:16px}.attachment-picker input{font-size:12px;padding:8px}.attachment-info{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;font-size:11px;color:#66745f;overflow-wrap:anywhere}.attachment-info button{padding:5px 9px;font-size:11px;flex-shrink:0}#received-file{padding:14px;background:#f2f5ed;border-radius:10px;margin:15px 0;overflow-wrap:anywhere}

.attachment-picker{border:1px solid #dce1d5;border-radius:8px;padding:10px 12px}.attachment-picker summary{font-size:12px}.attachment-picker[open] summary{margin-bottom:14px}.attachment-picker .muted{font-size:10px}@media(max-width:600px){.attachment-picker summary .muted{display:block;margin-left:16px}}

.file-privacy{border-top:1px solid #dce1d5;padding-top:12px;margin-top:12px}.file-privacy .check-label{display:flex;align-items:center;gap:9px;font-size:12px;font-weight:500;line-height:1.5}.file-privacy input[type=checkbox]{width:16px;height:16px;flex:0 0 16px;margin:0;accent-color:#294f3e}.file-privacy #file-privacy-status{color:#405a39}