/* Design tokens copied from the Framecast app (frontend/src/theme.css). Light is the default; dark follows the OS unless the visitor picks a theme. */
:root {
  --bg: #f6f6f7;
  --surface: #ffffff;
  --surface-2: #f1f2f4;
  --surface-3: #e9eaee;
  --border: #e2e3e7;
  --border-strong: #cfd1d7;
  --text: #16171a;
  --text-2: #464a53;
  --text-3: #6a6f79;
  --accent: #2f5bd3;
  --accent-hover: #2650c0;
  --accent-text: #2a52bf;
  --accent-weak: #e9eefc;
  --accent-ring: rgba(47, 91, 211, .22);
  --on-accent: #ffffff;
  --success: #1e7a46;
  --success-weak: #e7f5ec;
  --success-border: #b8e0c6;
  --warning: #9a5b00;
  --warning-weak: #fff3df;
  --warning-border: #f0d29d;
  --danger: #b3261e;
  --danger-weak: #fdeceb;
  --danger-border: #f2c2be;
  --shadow: 0 1px 2px rgba(16, 17, 20, .05);
  --shadow-lg: 0 16px 48px rgba(16, 17, 20, .18);
  --radius: 10px;
  --radius-sm: 6px;
  --font: Inter, "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, ui-monospace, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1012;
    --surface: #17181b;
    --surface-2: #1e1f23;
    --surface-3: #26282d;
    --border: #2a2c31;
    --border-strong: #3a3d44;
    --text: #ececef;
    --text-2: #b6b9c1;
    --text-3: #8d919b;
    --accent: #6f8ff7;
    --accent-hover: #86a1fa;
    --accent-text: #93abfb;
    --accent-weak: #1d2540;
    --accent-ring: rgba(111, 143, 247, .3);
    --on-accent: #0c1022;
    --success: #6fcf97;
    --success-weak: #15281d;
    --success-border: #285239;
    --warning: #f0b45a;
    --warning-weak: #2e2414;
    --warning-border: #5c4520;
    --danger: #f28b82;
    --danger-weak: #2e1716;
    --danger-border: #5e2b28;
    --shadow: none;
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1012;
  --surface: #17181b;
  --surface-2: #1e1f23;
  --surface-3: #26282d;
  --border: #2a2c31;
  --border-strong: #3a3d44;
  --text: #ececef;
  --text-2: #b6b9c1;
  --text-3: #8d919b;
  --accent: #6f8ff7;
  --accent-hover: #86a1fa;
  --accent-text: #93abfb;
  --accent-weak: #1d2540;
  --accent-ring: rgba(111, 143, 247, .3);
  --on-accent: #0c1022;
  --success: #6fcf97;
  --success-weak: #15281d;
  --success-border: #285239;
  --warning: #f0b45a;
  --warning-weak: #2e2414;
  --warning-border: #5c4520;
  --danger: #f28b82;
  --danger-weak: #2e1716;
  --danger-border: #5e2b28;
  --shadow: none;
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, .5);
  color-scheme: dark;
}

/* Base, as in the Framecast app */
:root{font-family:var(--font);color:var(--text);background:var(--bg);font-synthesis:none;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
button,input,a{font:inherit}
button{cursor:pointer;color:inherit;border:0;background:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}
button:disabled{opacity:.45;cursor:not-allowed}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
a{color:inherit;text-decoration:none}
p,h1,h2,h3,h4{margin:0}
h1{font-size:24px;font-weight:650;letter-spacing:-.02em;line-height:1.25}
h2{font-size:16px;font-weight:600;letter-spacing:-.01em;line-height:1.35;overflow-wrap:anywhere}
h3{font-size:14px;font-weight:600}
[hidden]{display:none!important}

/* Top bar */
.topbar{position:sticky;top:0;z-index:4;height:56px;background:var(--bg);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:24px;padding:0 32px}
.brand{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:650;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{width:30px;height:30px;display:block}
.brand small{font-size:16px;font-weight:500;color:var(--text-3)}
.topbar-end{margin-left:auto;display:flex;align-items:center;gap:12px}
.tag{font-size:12px;font-weight:500;color:var(--text-2);background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:2px 8px;white-space:nowrap}
.theme-switch{display:inline-flex;gap:2px;padding:2px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px}
.theme-switch button{width:28px;height:26px;border-radius:6px;color:var(--text-3)}
.theme-switch button:hover{color:var(--text)}
.theme-switch button.selected{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.theme-switch svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* Page */
main{flex:1;width:100%;max-width:600px;margin:0 auto;padding:48px 16px}
.page-heading{margin:0 0 24px}
.page-heading p{color:var(--text-3);margin-top:4px}
.facts{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:12px 0 0}
.panel{border:1px solid var(--border);background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);min-width:0}
.panel>p{color:var(--text-3);margin-top:4px}
.fine{font-size:12px;color:var(--text-3);margin-top:16px}

/* Controls */
.primary,.secondary,.quiet{border-radius:var(--radius-sm);font-weight:500;white-space:nowrap;transition:background .12s,border-color .12s}
.primary,.secondary{padding:0 16px;font-size:14px;min-height:36px}
.primary{background:var(--accent);color:var(--on-accent)}
.primary:hover:not(:disabled){background:var(--accent-hover)}
a.primary{display:flex;align-items:center;justify-content:center}
.wide{width:100%;margin-top:16px}
.secondary,.quiet{background:var(--surface);color:var(--text);border:1px solid var(--border-strong)}
.secondary:hover:not(:disabled),.quiet:hover:not(:disabled){background:var(--surface-2)}
.quiet{padding:0 12px;font-size:13px;min-height:30px;display:inline-flex;align-items:center}
.quiet.danger{color:var(--danger)}
.quiet.danger:hover:not(:disabled){background:var(--danger-weak);border-color:var(--danger-border)}
label{font-size:13px;font-weight:500;color:var(--text-2);display:flex;flex-direction:column;gap:8px;margin-top:16px}
input{width:100%;background:var(--surface);color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius-sm);padding:8px 12px;outline:none;font-size:14px;min-height:36px;transition:border-color .12s,box-shadow .12s}
input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-ring)}
input::placeholder{color:var(--text-3);opacity:.8}

/* Upload workspace */
.heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
.heading .muted{font-size:13px;color:var(--text-3)}
#dropzone{border:1px dashed var(--border-strong);border-radius:var(--radius);padding:32px 16px;display:flex;flex-direction:column;align-items:center;gap:4px;margin:16px 0;cursor:pointer;text-align:center;background:var(--surface-2);transition:background .12s,border-color .12s}
#dropzone:hover,#dropzone.dragging{border-color:var(--accent);background:var(--accent-weak)}
#dropzone svg{width:20px;height:20px;fill:none;stroke:var(--text-3);stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;margin-bottom:8px}
#dropzone:hover svg,#dropzone.dragging svg{stroke:var(--accent-text)}
#dropzone strong{font-weight:500}
#dropzone>span{font-size:13px;color:var(--text-3)}
#progressbox{margin-bottom:16px}
#uploadname{font-size:13px;font-weight:500;overflow-wrap:anywhere}
progress{appearance:none;-webkit-appearance:none;display:block;width:100%;height:6px;border:0;border-radius:3px;background:var(--surface-3);margin-top:8px;overflow:hidden}
progress::-webkit-progress-bar{background:var(--surface-3)}
progress::-webkit-progress-value{background:var(--accent)}
progress::-moz-progress-bar{background:var(--accent)}
#progresslabel{font-size:13px;color:var(--text-3);margin-top:8px;font-variant-numeric:tabular-nums}
.listheading{border-top:1px solid var(--border);margin-top:20px;padding-top:20px}
#usage{margin-top:4px;font-variant-numeric:tabular-nums}
.file{padding:16px 0;border-top:1px solid var(--border)}
#list .file:first-child{border-top:0}
.file h4{font-size:14px;font-weight:500;margin:0 0 2px;overflow-wrap:anywhere}
.file p{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
#list .empty{padding:16px 0 0;color:var(--text-3)}

/* Recipient */
#filemeta{color:var(--text-3);margin-top:4px;font-variant-numeric:tabular-nums}
#countdown{display:inline-block;margin-top:12px;font-size:13px;font-weight:500;color:var(--text-2);background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-variant-numeric:tabular-nums}
.checksum{overflow-wrap:anywhere;font-family:var(--mono)}
.status{font-size:13px;color:var(--text-2);min-height:20px;margin-top:16px;overflow-wrap:anywhere}

footer{display:flex;gap:16px;justify-content:space-between;padding:24px 32px;border-top:1px solid var(--border);color:var(--text-3);font-size:12px}
@media(max-width:680px){.topbar{padding:0 16px;gap:12px}.topbar .tag{display:none}main{padding:32px 16px}.panel{padding:16px}footer{flex-direction:column;gap:4px;padding:24px 16px}}