/* ============================================================
   Image to SVG Vectorizer
   Premium, theme-aware styling built on the site CSS variables.
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

main.container {
    display: block;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

main h1 {
    color: var(--primary-text-color);
    font-size: 2.6rem;
    line-height: 1.1;
    margin-bottom: 12px;
    text-align: center;
    letter-spacing: -0.02em;
}

main .subtitle {
    color: var(--secondary-text-color);
    text-align: center;
    max-width: 720px;
    margin: 0 auto 36px;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* ---------- Layout ---------- */
.tool-layout {
    display: grid;
    grid-template-columns: minmax(320px, 420px) 1fr;
    gap: 26px;
    align-items: start;
}

.panel {
    background: var(--input-bg-color);
    border: 1px solid var(--input-border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.18);
}

/* ---------- Upload ---------- */
.upload-area {
    border: 2px dashed var(--input-border-color);
    border-radius: 14px;
    padding: 38px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .25s, background .25s, transform .25s;
    background: color-mix(in srgb, var(--button-bg-color) 6%, transparent);
}
.upload-area:hover,
.upload-area:focus-visible,
.upload-area.dragover {
    border-color: var(--button-bg-color);
    background: color-mix(in srgb, var(--button-bg-color) 14%, transparent);
    outline: none;
    transform: translateY(-2px);
}
.upload-area svg { color: var(--button-bg-color); margin-bottom: 14px; }
.upload-area h3 { color: var(--primary-text-color); font-size: 1.05rem; margin-bottom: 6px; }
.upload-area p { color: var(--secondary-text-color); font-size: .85rem; letter-spacing: .04em; }

/* ---------- Source meta ---------- */
.source-meta {
    display: flex;
    gap: 14px;
    align-items: center;
    margin-top: 18px;
    padding: 14px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--primary-text-color) 5%, transparent);
    border: 1px solid var(--input-border-color);
}
.thumb-wrap {
    width: 64px; height: 64px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
    background:
        repeating-conic-gradient(#808080 0% 25%, #a9a9a9 0% 50%) 50% / 16px 16px;
    display: flex; align-items: center; justify-content: center;
}
.thumb-wrap img { width: 100%; height: 100%; object-fit: contain; }
.source-info { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.source-name {
    color: var(--primary-text-color); font-weight: 600; font-size: .95rem;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 240px;
}
.source-dims { color: var(--secondary-text-color); font-size: .82rem; }

.text-btn {
    background: none; border: none; padding: 0; margin-top: 2px;
    color: var(--button-bg-color); font-size: .82rem; cursor: pointer;
    text-align: left; text-decoration: underline; text-underline-offset: 2px;
}
.text-btn:hover { color: var(--button-hover-bg-color); }

/* ---------- Settings ---------- */
.settings { margin-top: 22px; }
.settings-title {
    color: var(--primary-text-color); font-size: 1rem; margin-bottom: 16px;
    padding-bottom: 10px; border-bottom: 1px solid var(--input-border-color);
}

.form-group { margin-bottom: 18px; }
.form-group > label {
    display: flex; justify-content: space-between; align-items: baseline;
    color: var(--primary-text-color); font-weight: 600; font-size: .92rem; margin-bottom: 9px;
}
.form-group .val {
    color: var(--button-bg-color); font-weight: 700; font-size: .85rem;
    background: color-mix(in srgb, var(--button-bg-color) 14%, transparent);
    padding: 2px 9px; border-radius: 999px;
}
.form-group small {
    display: block; color: var(--secondary-text-color); font-size: .8rem; margin-top: 7px; line-height: 1.4;
}

/* Preset buttons */
.preset-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.preset-btn {
    padding: 9px 6px;
    background: var(--primary-bg-color);
    color: var(--primary-text-color);
    border: 1px solid var(--input-border-color);
    border-radius: 8px; cursor: pointer; font-size: .82rem; font-weight: 500;
    transition: all .18s;
}
.preset-btn:hover { border-color: var(--button-bg-color); transform: translateY(-1px); }
.preset-btn.active {
    background: var(--button-bg-color); color: var(--button-text-color);
    border-color: var(--button-bg-color);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--button-bg-color) 45%, transparent);
}

/* Range inputs */
input[type="range"] {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 6px; border-radius: 999px;
    background: color-mix(in srgb, var(--primary-text-color) 18%, transparent);
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--button-bg-color);
    border: 2px solid var(--input-bg-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35);
    transition: transform .15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--button-bg-color); border: 2px solid var(--input-bg-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35); cursor: pointer;
}

/* Checkbox */
.checkbox-label {
    display: flex; align-items: center; gap: 9px; cursor: pointer;
    color: var(--primary-text-color); font-size: .9rem;
}
.checkbox-label input[type="checkbox"] {
    width: 18px; height: 18px; cursor: pointer; accent-color: var(--button-bg-color);
}
.live-toggle { margin: 4px 0 20px; }

/* Advanced */
.advanced {
    border: 1px solid var(--input-border-color);
    border-radius: 10px; padding: 4px 14px; margin-bottom: 20px;
    background: color-mix(in srgb, var(--primary-text-color) 3%, transparent);
}
.advanced summary {
    cursor: pointer; padding: 10px 0; color: var(--primary-text-color);
    font-weight: 600; font-size: .9rem; list-style: none;
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before { content: "▸ "; color: var(--button-bg-color); }
.advanced[open] summary::before { content: "▾ "; }
.advanced[open] { padding-bottom: 6px; }

/* Buttons */
.primary-btn, .ghost-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 22px; border-radius: 10px; font-size: .98rem; font-weight: 600;
    cursor: pointer; transition: transform .18s, background .18s, box-shadow .18s;
    border: none;
}
.primary-btn {
    width: 100%;
    background: var(--button-bg-color); color: var(--button-text-color);
    box-shadow: 0 6px 18px color-mix(in srgb, var(--button-bg-color) 40%, transparent);
}
.primary-btn:hover { background: var(--button-hover-bg-color); transform: translateY(-2px); }
.primary-btn:active { transform: translateY(0); }
.primary-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }

.ghost-btn {
    background: transparent; color: var(--primary-text-color);
    border: 1px solid var(--input-border-color);
}
.ghost-btn:hover { border-color: var(--button-bg-color); color: var(--button-bg-color); transform: translateY(-2px); }
.ghost-btn.copied { border-color: var(--button-bg-color); color: var(--button-bg-color); }

/* ---------- Preview panel ---------- */
.preview-panel { display: flex; flex-direction: column; min-height: 560px; }

.preview-toolbar {
    display: flex; justify-content: space-between; align-items: center;
    gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.view-tabs {
    display: inline-flex; padding: 4px; gap: 4px; border-radius: 10px;
    background: var(--primary-bg-color); border: 1px solid var(--input-border-color);
}
.view-tab {
    padding: 7px 16px; border: none; background: transparent; cursor: pointer;
    color: var(--secondary-text-color); font-size: .88rem; font-weight: 600;
    border-radius: 7px; transition: all .18s;
}
.view-tab:hover { color: var(--primary-text-color); }
.view-tab.active { background: var(--button-bg-color); color: var(--button-text-color); }
.bg-toggle { font-size: .84rem; color: var(--secondary-text-color); }

/* Stage */
.preview-stage {
    position: relative; flex: 1; min-height: 380px;
    border-radius: 12px; overflow: hidden;
    border: 1px solid var(--input-border-color);
    background: var(--primary-bg-color);
    display: flex; align-items: center; justify-content: center;
}
.preview-stage.checker-on {
    background:
        repeating-conic-gradient(#c9c9c9 0% 25%, #f5f5f5 0% 50%) 50% / 24px 24px;
}

.placeholder {
    display: flex; flex-direction: column; align-items: center; gap: 14px;
    color: var(--secondary-text-color); text-align: center; padding: 20px;
}
.placeholder svg { color: var(--secondary-text-color); opacity: .4; }

/* Views */
.view { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.result-view { padding: 20px; }
.result-view svg { max-width: 100%; max-height: 100%; height: auto; width: auto; display: block; }

/* Compare */
.compare-view { overflow: hidden; }
.compare-original, .compare-result {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.compare-original img { max-width: 100%; max-height: 100%; object-fit: contain; }
.compare-result { clip-path: inset(0 0 0 50%); }
.compare-result svg { max-width: 100%; max-height: 100%; height: auto; width: auto; }
.compare-handle {
    position: absolute; top: 0; bottom: 0; left: 50%; width: 3px;
    background: var(--button-bg-color); transform: translateX(-50%); cursor: ew-resize; z-index: 3;
}
.handle-line { position: absolute; inset: 0; }
.handle-grip {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--button-bg-color); color: var(--button-text-color);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 3px 12px rgba(0, 0, 0, .4);
}
.handle-grip svg { margin: 0 -3px; }

/* Code */
.code-view { padding: 0; }
.code-view pre {
    width: 100%; height: 100%; overflow: auto; margin: 0; padding: 18px;
    background: var(--code-bg-color); text-align: left;
}
.code-view code {
    color: var(--code-text-color); font-family: "Consolas", "Monaco", monospace;
    font-size: .8rem; line-height: 1.55; white-space: pre-wrap; word-break: break-all;
}

/* Loader */
.loader {
    position: absolute; inset: 0; z-index: 5;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
    background: color-mix(in srgb, var(--primary-bg-color) 78%, transparent);
    backdrop-filter: blur(2px);
    color: var(--primary-text-color); font-weight: 600;
}
.spinner {
    width: 42px; height: 42px; border-radius: 50%;
    border: 4px solid color-mix(in srgb, var(--primary-text-color) 18%, transparent);
    border-top-color: var(--button-bg-color);
    animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Results bar */
.results-bar {
    margin-top: 18px; display: flex; justify-content: space-between; align-items: center;
    gap: 18px; flex-wrap: wrap;
}
.stats { display: flex; gap: 24px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-label { color: var(--secondary-text-color); font-size: .74rem; text-transform: uppercase; letter-spacing: .06em; }
.stat-value { color: var(--primary-text-color); font-size: 1.05rem; font-weight: 700; }
.actions { display: flex; gap: 10px; }

/* Info box */
.info-box {
    display: flex; gap: 14px; padding: 18px 20px; margin-top: 28px;
    background: var(--input-bg-color); border: 1px solid var(--input-border-color);
    border-radius: 14px; color: var(--primary-text-color);
    font-size: .92rem; line-height: 1.55; box-shadow: 0 6px 20px rgba(0, 0, 0, .12);
}
.info-box svg { flex-shrink: 0; stroke: var(--button-bg-color); margin-top: 2px; }
.info-box strong { color: var(--button-bg-color); }
.info-box a { color: var(--button-bg-color); text-underline-offset: 2px; }

/* Toast */
.toast {
    position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px);
    background: var(--button-bg-color); color: var(--button-text-color);
    padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: .92rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .35); opacity: 0; pointer-events: none;
    transition: opacity .25s, transform .25s; z-index: 1000;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: #c0392b; }

.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
    .tool-layout { grid-template-columns: 1fr; }
    .preview-panel { min-height: 480px; }
}
@media (max-width: 560px) {
    main h1 { font-size: 2rem; }
    main .subtitle { font-size: 1rem; }
    .preset-grid { grid-template-columns: repeat(2, 1fr); }
    .results-bar { flex-direction: column; align-items: stretch; }
    .actions { flex-direction: column; }
    .actions .primary-btn, .actions .ghost-btn { width: 100%; }
    .stats { justify-content: space-between; gap: 14px; }
}