:root { color-scheme: dark; font-family: system-ui, sans-serif; color: #edf2fc; background: #0c1120; --muted: #a5b2ca; --line: #303c57; --blue: #85b4ff; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.55; }
a { color: var(--blue); }
button, select, input { font: inherit; }
button, a, input, select { touch-action: manipulation; }
:focus-visible { outline: 3px solid #b1d2ff; outline-offset: 4px; }
[hidden] { display: none !important; }
header { display: flex; align-items: center; justify-content: space-between; padding: 22px max(24px, calc((100vw - 1280px) / 2)); border-bottom: 1px solid var(--line); }
header a { text-decoration: none; }
.brand { font-size: 24px; font-weight: 800; color: #fff; letter-spacing: -1px; }
.brand span { color: var(--blue); }
.brand small { margin-left: 10px; font-size: 10px; letter-spacing: 2px; color: #89e2cb; }
main { max-width: 1328px; margin: auto; padding: 35px 24px; }
.intro { padding: 8px 0 32px; }
.eyebrow { color: var(--blue); font-size: 11px; letter-spacing: 2px; }
h1 { font-size: clamp(36px, 5vw, 62px); line-height: 1.12; letter-spacing: -2px; margin: 15px 0; }
h1 span { color: var(--blue); }
.intro > p:last-child { color: var(--muted); }
.workspace { display: grid; grid-template-columns: 345px minmax(0, 1fr); border: 1px solid var(--line); border-radius: 16px; background: #131c30; overflow: hidden; }
.settings { padding: 26px; border-right: 1px solid var(--line); min-width: 0; }
h2, legend { font-size: 13px; letter-spacing: .6px; color: var(--blue); margin: 0 0 20px; font-weight: 700; }
h2 span, legend span { color: #edf2fc; margin-left: 8px; }
.drop { display: flex; position: relative; flex-direction: column; gap: 8px; text-align: center; padding: 28px 16px; border: 1px dashed #596d91; border-radius: 10px; cursor: pointer; }
.drop:hover, .drop.dragover, .drop:focus-within { border-color: var(--blue); background: #1a2946; }
.drop input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.drop strong { font-size: 14px; }
.drop span { font-size: 11px; color: var(--muted); }
.muted { color: var(--muted); font-size: 12px; }
#file-info { overflow-wrap: anywhere; margin-bottom: 28px; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend { padding: 0; }
label, .alpha p { font-size: 13px; }
select { width: 100%; margin-top: 8px; padding: 11px 8px; border: 1px solid #52617c; border-radius: 7px; background: #0d1628; color: #edf2fc; font-size: 12px; }
.alpha { margin-top: 24px; }
.alpha label { display: flex; align-items: center; gap: 8px; min-height: 38px; cursor: pointer; }
input[type=radio], input[type=checkbox] { accent-color: var(--blue); width: 17px; height: 17px; cursor: pointer; }
.advanced-box { margin-top: 20px; border: 1px solid var(--line); border-radius: 8px; padding: 12px; background: #0c1527; }
.advanced-box summary { font-size: 13px; font-weight: 700; color: var(--blue); cursor: pointer; user-select: none; }
.adv-grid { display: flex; flex-direction: column; gap: 14px; margin-top: 14px; }
.adv-field { display: flex; flex-direction: column; gap: 4px; }
.adv-label-row { display: flex; justify-content: space-between; align-items: baseline; font-size: 12px; }
.adv-label-row label { font-size: 12px; font-weight: 600; color: #edf2fc; }
.adv-val { font-size: 11px; color: var(--blue); font-family: monospace; }
.adv-field input[type=number] { width: 100%; padding: 8px; border: 1px solid #455573; border-radius: 6px; background: #070e1d; color: #fff; font-size: 13px; }
.adv-field small { font-size: 11px; line-height: 1.4; color: var(--muted); }
.upscale-box { margin-top: 22px; border-top: 1px dashed var(--line); padding-top: 18px; }
.upscale-title { font-size: 13px; font-weight: 700; color: #89e2cb; margin: 0 0 10px; }
.check-label { display: flex; align-items: center; gap: 8px; font-size: 12px; cursor: pointer; margin-bottom: 12px; }
.upscale-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.upscale-row select { width: auto; flex: 0 0 140px; margin-top: 0; padding: 9px; }
.upscale-row button { padding: 9px 12px; font-size: 12px; }
.actions { display: flex; gap: 8px; margin-top: 24px; }
button { cursor: pointer; border: 0; border-radius: 8px; padding: 13px 16px; background: #92bdff; color: #0a1934; font-size: 13px; font-weight: 750; flex: 1; }
button:hover:not(:disabled) { background: #bbd6ff; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.secondary { background: #293752; color: #fff; }
button.secondary:hover:not(:disabled) { background: #3b4d70; }
#status { font-size: 12px; min-height: 38px; color: var(--muted); overflow-wrap: anywhere; }
#status[data-error=true] { color: #ffb5ba; }
.previews { padding: 26px; min-width: 0; }
.preview-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.badge { color: #89e2cb; font-size: 10px; letter-spacing: 1px; font-weight: 700; }
.preview-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
figure { margin: 0; min-width: 0; }
figcaption { font-size: 12px; color: var(--muted); display: flex; justify-content: space-between; margin-bottom: 10px; gap: 8px; }
.canvas { height: 350px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: repeating-conic-gradient(#263149 0% 25%, #1b253b 0% 50%) 50% / 20px 20px; }
.canvas img { display: block; max-width: 100%; max-height: 100%; object-fit: contain; }
.canvas p { font-size: 12px; text-align: center; padding: 24px; color: #bbc8dd; }
.result-bar { display: flex; align-items: center; justify-content: space-between; gap: 15px; border-top: 1px solid var(--line); margin-top: 24px; padding-top: 16px; }
.download-group { display: flex; gap: 8px; flex-wrap: wrap; }
#stats, .privacy { font-size: 12px; color: var(--muted); }
.download { text-decoration: none; background: #89e2cb; color: #09261f; padding: 11px 18px; border-radius: 8px; font-size: 13px; font-weight: 700; white-space: nowrap; }
.download-png { background: #92bdff; color: #0a1934; }
.download:hover { filter: brightness(1.1); }
.privacy { margin-top: 28px; border-left: 2px solid #4e668c; padding-left: 12px; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 11px; color: var(--muted); padding-top: 24px; }
@media (max-width: 1000px) { .workspace { grid-template-columns: 300px minmax(0, 1fr); } .preview-grid { grid-template-columns: 1fr; } .canvas { height: 270px; } }
@media (max-width: 700px) { main { padding: 24px 16px; } header { padding: 18px; } .workspace { grid-template-columns: 1fr; } .settings { border-right: 0; border-bottom: 1px solid var(--line); } .settings, .previews { padding: 20px; } .result-bar { flex-wrap: wrap; } .upscale-row { flex-wrap: wrap; } }