/* ── Reset & theme variables ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root[data-theme="dark"] {
    --bg:           #0c0c0c;
    --bg-sidebar:   #111113;
    --bg-input:     #1c1c1e;
    --bg-canvas:    #0a0a0a;
    --border:       #2a2a2e;
    --border-mid:   #3a3a3e;
    --text:         #ddd;
    --text-dim:     #777;
    --text-dimmer:  #555;
    --accent:       #00ff41;
    --accent-dim:   #00cc33;
    --accent-text:  #000;
    --scrollbar:    #333;
}

:root[data-theme="light"] {
    --bg:           #f0f0ec;
    --bg-sidebar:   #ffffff;
    --bg-input:     #e8e8e5;
    --bg-canvas:    #f5f5f0;
    --border:       #d8d8d5;
    --border-mid:   #c0c0bc;
    --text:         #1a1a1a;
    --text-dim:     #666;
    --text-dimmer:  #999;
    --accent:       #0060cc;
    --accent-dim:   #004faa;
    --accent-text:  #fff;
    --scrollbar:    #ccc;
}

html, body { height: 100%; overflow: hidden; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 13px;
    transition: background 0.2s, color 0.2s;
}

/* ── Layout ──────────────────────────────────────────────────────────── */
#app { display: flex; height: 100vh; }

/* Drop screen */
#drop-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    cursor: pointer;
}

#drop-zone {
    border: 2px dashed var(--border-mid);
    border-radius: 16px;
    padding: 80px 40px;
    text-align: center;
    max-width: 520px;
    width: 100%;
    transition: border-color 0.2s, background 0.2s;
}
#drop-screen:hover #drop-zone,
#drop-screen.dragover #drop-zone {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 5%, transparent);
}
.drop-icon { font-size: 52px; margin-bottom: 18px; opacity: 0.55; }
#drop-zone p { color: var(--text-dim); font-size: 15px; margin-bottom: 8px; line-height: 1.5; }
#drop-zone .hint { font-size: 12px; color: var(--text-dimmer); }
#drop-zone code {
    font-family: "Courier New", monospace;
    background: var(--bg-input);
    padding: 1px 5px;
    border-radius: 3px;
    color: var(--text-dim);
}

/* Workspace: sidebar + main */
#workspace {
    flex: 1;
    display: grid;
    grid-template-columns: 260px 1fr;
    overflow: hidden;
}

/* ── Sidebar ──────────────────────────────────────────────────────────── */
#sidebar {
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 16px 14px 20px;
    gap: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar) transparent;
    transition: background 0.2s, border-color 0.2s;
}

#sidebar h1 {
    font-family: "Courier New", monospace;
    font-size: 15px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

#sidebar h2 {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-dimmer);
    margin-bottom: 8px;
    margin-top: 2px;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 10px 0;
}

section { display: flex; flex-direction: column; gap: 8px; }

/* Source section */
#source-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding-bottom: 4px;
}

#source-thumb {
    width: 100%;
    max-height: 100px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg);
}
#source-thumb.hidden { display: none; }

#source-name {
    font-size: 11px;
    color: var(--text-dim);
    word-break: break-all;
    text-align: center;
}

#source-meta {
    font-size: 10px;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.5;
    opacity: 0.8;
}
#source-meta.hidden { display: none; }

/* Fields */
.field {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: default;
}
.field > span {
    font-size: 12px;
    color: var(--text-dim);
    display: flex;
    justify-content: space-between;
}
.field > span em {
    font-style: normal;
    color: var(--text-dimmer);
    font-size: 11px;
}
.field.toggle {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}
.field.toggle > span { color: var(--text-dim); font-size: 12px; }

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
    height: 3px;
    cursor: pointer;
}
select, input[type="number"] {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 5px 8px;
    border-radius: 5px;
    font-size: 12px;
    cursor: pointer;
    transition: border-color 0.15s;
}
select:hover, input[type="number"]:hover { border-color: var(--border-mid); }

input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

input[type="color"] {
    width: 32px; height: 26px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: none;
    padding: 0;
    cursor: pointer;
}

/* Buttons */
.btn-primary, .btn-ghost {
    width: 100%;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity 0.15s, background 0.15s;
}
.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
}
.btn-primary:hover { background: var(--accent-dim); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-ghost {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-weight: 400;
}
.btn-ghost:hover { border-color: var(--border-mid); }

.btn-small { padding: 5px 10px; font-size: 11px; }

/* Progress */
#progress-bar {
    position: relative;
    height: 22px;
    background: var(--bg-input);
    border-radius: 5px;
    overflow: hidden;
}
#progress-fill {
    height: 100%;
    background: var(--accent);
    transition: width 0.1s;
    border-radius: 5px;
}
#progress-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-family: "Courier New", monospace;
    font-weight: 600;
    color: var(--accent-text);
    mix-blend-mode: difference;
}

/* Export info */
#export-info {
    font-size: 11px;
    color: var(--text-dimmer);
    font-family: "Courier New", monospace;
    word-break: break-all;
    line-height: 1.5;
}

/* ── Main viewer area ─────────────────────────────────────────────────── */
#viewer-area {
    display: grid;
    grid-template-rows: auto 1fr auto;
    overflow: hidden;
    background: var(--bg);
    transition: background 0.2s;
}

/* Playback bar */
#playback-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-sidebar);
    flex-wrap: wrap;
    transition: background 0.2s, border-color 0.2s;
}

#playback-bar button {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    width: 30px; height: 28px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.12s;
}
#playback-bar button:hover { background: var(--border); }

#frame-info {
    color: var(--text-dim);
    font-family: "Courier New", monospace;
    font-size: 12px;
    min-width: 70px;
}

#playback-bar label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-dim);
    font-size: 12px;
    white-space: nowrap;
}
#playback-bar input[type="range"] { width: 80px; }
#speed-val {
    font-family: "Courier New", monospace;
    font-size: 11px;
    color: var(--text-dimmer);
    min-width: 34px;
}

/* Canvas wrap */
#canvas-wrap {
    overflow: auto;
    position: relative;
    background: var(--bg-canvas);
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar) transparent;
    transition: background 0.2s;
}

#canvas-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dimmer);
    font-size: 14px;
    pointer-events: none;
}

#canvas { display: block; }

/* Info bar */
#info-bar {
    padding: 6px 14px;
    border-top: 1px solid var(--border);
    background: var(--bg-sidebar);
    color: var(--text-dimmer);
    font-family: "Courier New", monospace;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background 0.2s, border-color 0.2s;
}

/* ── Utilities ───────────────────────────────────────────────────────── */
.hidden { display: none !important; }

@media (max-width: 640px) {
    #workspace { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
    #sidebar { max-height: 40vh; overflow-y: auto; border-right: none; border-bottom: 1px solid var(--border); }
}