:root{
  --bg:#0b0d10;
  --bg2:#111827;
  --topbar:rgba(11,13,16,.82);
  --panel:#12161c;
  --panel2:#171d25;
  --input:#0d1117;
  --text:#e9eef6;
  --muted:#98a2b3;
  --line:#293241;
  --accent:#7dd3fc;
  --accentText:#031018;
  --danger:#fb7185;
  --ok:#86efac;
  --warn:#fbbf24;
  --shadow:rgba(0,0,0,.22);
  --cardGradient1:rgba(255,255,255,.04);
  --cardGradient2:rgba(255,255,255,.02);
  color-scheme:dark;
}

html[data-theme="light"]{
  --bg:#f5f7fb;
  --bg2:#e8eef8;
  --topbar:rgba(255,255,255,.86);
  --panel:#ffffff;
  --panel2:#f0f4fa;
  --input:#ffffff;
  --text:#111827;
  --muted:#5f6b7a;
  --line:#d8e0eb;
  --accent:#0284c7;
  --accentText:#ffffff;
  --danger:#e11d48;
  --ok:#15803d;
  --warn:#d97706;
  --shadow:rgba(15,23,42,.10);
  --cardGradient1:rgba(255,255,255,.92);
  --cardGradient2:rgba(255,255,255,.78);
  color-scheme:light;
}

*{box-sizing:border-box}
html{min-height:100%}
body{margin:0;min-height:100%;background:radial-gradient(circle at top,var(--bg2) 0,var(--bg) 45%);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;line-height:1.45;transition:background-color .2s ease,color .2s ease}
a{color:var(--accent)}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line);background:var(--topbar);backdrop-filter:blur(12px);position:sticky;top:0;z-index:10}
.brand{font-weight:800;letter-spacing:.02em;color:var(--text);text-decoration:none;font-size:20px}
.topbar nav{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.topbar nav a{color:var(--muted);text-decoration:none}
.topbar nav a:hover{color:var(--text)}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:72px;padding:8px 11px;border-radius:999px;border:1px solid var(--line);background:var(--panel2);color:var(--text);font-weight:800;cursor:pointer}
.theme-toggle:hover{border-color:var(--accent)}
.wrap{max-width:1080px;margin:0 auto;padding:36px 18px}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:start}
.card{background:linear-gradient(180deg,var(--cardGradient1),var(--cardGradient2));border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 20px 60px var(--shadow)}
.card + .card{margin-top:18px}
.hero > .card + .card{margin-top:0}
h1,h2,h3{margin:0 0 14px;color:var(--text)}
p{color:var(--muted)}
strong,b{color:var(--text)}
ul,ol{color:var(--muted);padding-left:22px}
li{margin:7px 0}
label{display:block;font-weight:700;margin:14px 0 7px;color:var(--text)}
input,select,textarea{width:100%;padding:12px 13px;border-radius:12px;border:1px solid var(--line);background:var(--input);color:var(--text);outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
input[type=checkbox]{width:auto;margin-right:8px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:16px}
.btn,button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 15px;border:0;border-radius:12px;background:var(--accent);color:var(--accentText);font-weight:800;text-decoration:none;cursor:pointer}
.btn.secondary,button.secondary{background:var(--panel2);color:var(--text)}
.btn.danger,button.danger{background:var(--danger);color:white}
.btn.warn,button.warn{background:var(--warn);color:#111}
.btn.ghost,button.ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.muted{color:var(--muted)}
.small{font-size:13px}
.flash{border-radius:12px;padding:12px 14px;margin-bottom:16px;border:1px solid var(--line)}
.flash.success{border-color:#15803d;background:rgba(22,163,74,.12)}
.flash.error{border-color:#be123c;background:rgba(225,29,72,.12)}
.flash.info{border-color:#0284c7;background:rgba(14,165,233,.12)}

.site-warning-box{border:1px solid #b91c1c;background:rgba(185,28,28,.18);color:var(--text);border-radius:14px;padding:14px 16px;margin-bottom:18px;box-shadow:0 12px 30px rgba(127,29,29,.18)}
.site-warning-box strong{font-weight:900;color:#fecaca}
html[data-theme="light"] .site-warning-box{background:#fee2e2;border-color:#b91c1c;color:#450a0a}
html[data-theme="light"] .site-warning-box strong{color:#7f1d1d}
table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:14px}
th,td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--text);background:rgba(127,127,127,.08)}
td{color:var(--text)}
.pill{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 8px;color:var(--muted);font-size:12px}
.download-page{text-align:center;max-width:620px;margin:42px auto}
.filename{font-size:22px;font-weight:900;word-break:break-word;color:var(--text)}
.mono{font-family:Consolas,Monaco,monospace}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.stat{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:14px}
.stat b{display:block;font-size:26px}
.footer{text-align:center;color:var(--muted);font-size:13px;padding:28px}
.dangertext{color:var(--danger)}
.oktext{color:var(--ok)}
.about-page{max-width:920px;margin:0 auto}
.about-page .card{margin-bottom:18px}
.about-page h1{font-size:34px}
.about-page h2{margin-top:4px}
.about-page .lead{font-size:17px;color:var(--muted)}
.about-page .notice-list{margin-top:8px}
.about-page .steps li{margin-bottom:10px}
@media(max-width:800px){.hero,.row,.grid3{grid-template-columns:1fr}.topbar{align-items:flex-start;gap:12px;flex-direction:column}.topbar nav{gap:10px}.theme-toggle{min-width:auto}}

.local-key-error{color:var(--danger);font-weight:800}

.local-key-security .local-key-options{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}
.local-key-option{display:block;margin:0;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--panel2);cursor:pointer}
.local-key-option input[type=radio]{width:auto;margin-right:8px}
.local-key-option ul{margin:10px 0 0;padding-left:20px}
.local-key-option li{margin:5px 0}
.vault-controls{margin-top:16px;padding:16px;border:1px solid var(--line);border-radius:14px;background:rgba(127,127,127,.06)}
@media(max-width:900px){.local-key-security .local-key-options{grid-template-columns:1fr}}

.file-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.inline-delete-form{display:inline;margin:0}
.modal-open{overflow:hidden}
.modal-backdrop{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:18px;background:rgba(0,0,0,.62);backdrop-filter:blur(6px)}
.modal-backdrop[hidden]{display:none}
.modal-card{width:min(560px,100%);max-height:calc(100vh - 36px);overflow:auto;background:linear-gradient(180deg,var(--cardGradient1),var(--cardGradient2));border:1px solid var(--line);border-radius:18px;box-shadow:0 24px 80px rgba(0,0,0,.38);padding:22px}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:12px}
.modal-head h2{margin-bottom:4px}
.modal-close{font-size:22px;line-height:1;min-width:42px;padding:8px 12px}
.modal-actions{justify-content:flex-end}
@media(max-width:700px){.file-actions{align-items:stretch}.file-actions > *,.file-actions button{width:100%}.modal-card{padding:18px}.modal-actions{justify-content:stretch}.modal-actions button{width:100%}}


.upload-result-box{margin-top:16px}
.share-result{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:12px;align-items:center}
.share-result-input{font-size:13px}
.share-result-copy{white-space:nowrap}
@media(max-width:700px){.share-result{grid-template-columns:1fr}.share-result-copy{width:100%}}

.preview-option{margin-top:12px;padding:14px;border:1px solid var(--line);border-radius:14px;background:rgba(127,127,127,.06)}
.preview-box{margin:18px auto 0;text-align:left;border:1px solid var(--line);border-radius:16px;background:var(--panel2);padding:14px;max-width:100%;overflow:auto}
.media-preview{display:block;max-width:100%;max-height:70vh;margin:0 auto;border-radius:12px;background:var(--input)}
audio.media-preview{width:100%}
.text-preview{white-space:pre-wrap;word-break:break-word;max-height:60vh;overflow:auto;margin:0;padding:12px;border-radius:12px;background:var(--input);color:var(--text);font-size:13px;line-height:1.45}

.public-link-slot{word-break:break-word}
.public-share-link{word-break:break-all}