* {
    box-sizing: border-box
}

:root {
    --bg: #0b0f14;
    --fg: #e8f1ff;
    --muted: #9fb3c8;
    --accent: #56a8ff;
    --panel: #121a22;
    --border: #1d2a36;
    --pill: #203044
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--fg)
}

header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, #0b0f14, #10161d)
}

h1 {
    margin: 0;
    font-size: 22px;
    letter-spacing: .3px
}

h2 {
    margin: 0 0 8px 0;
    font-size: 16px;
    color: #cfe2ff
}

.tagline {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px
}

.wizard {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 16px;
    padding: 16px;
    min-height: calc(100vh - 120px)
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px
}

.step {
    margin-bottom: 8px
}

.uploader {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px
}

label.file {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px dashed var(--border);
    padding: 10px 12px;
    border-radius: 10px;
    cursor: pointer
}

label.file input {
    display: none
}

.controls {
    display: grid;
    gap: 8px
}

.controls label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--muted);
    gap: 10px
}

.controls .grow {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 6px
}

.controls input[type=text],
.controls input[type=url] {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: transparent;
    color: var(--fg)
}

.controls input[type=range] {
    width: 160px
}

.controls select,
.controls input[type=range] {
    accent-color: var(--accent)
}

.controls button {
    margin-top: 8px;
    background: var(--accent);
    border: none;
    color: #001222;
    padding: 10px 12px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600
}

.controls .ghost {
    background: transparent;
    color: var(--fg);
    border: 1px solid var(--border)
}

.controls .row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center
}

.status {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 6px
}

.pill {
    background: var(--pill);
    color: var(--fg);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px
}

/* BEFORE/AFTER grid (never stretch, always fit) */
.stage .ba-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px
}

.viewer {
    display: grid;
    gap: 6px
}

.viewer-label {
    color: var(--muted);
    font-size: 12px
}

.canvas-wrap {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16/9;
    /* responsive box */
    background: #0d141b;
    border-radius: 10px;
    overflow: hidden
}

canvas,
video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* keep aspect, letterbox */
    object-position: center center;
}

#canvas-before {
    display: none
}

/* show video when video; canvas when image */

footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    color: var(--muted)
}

@media (max-width:1100px) {
    .wizard {
        grid-template-columns: 1fr
    }
}