/* SVG Center Content — isolated UI. Every selector is prefixed with .svgcenter-. */

/* ── Shell ──────────────────────────────────────────────────────────────────── */

.svgcenter-shell {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ── Shared card surface ────────────────────────────────────────────────────── */

.svgcenter-hero,
.svgcenter-actions,
.svgcenter-stats,
.svgcenter-preview-card,
.svgcenter-code-card,
.svgcenter-settings,
.svgcenter-output-card,
.svgcenter-error {
    background:
        radial-gradient(circle at top left, rgba(99, 102, 241, 0.12), transparent 31rem),
        linear-gradient(180deg, rgba(24, 27, 36, 0.98), rgba(17, 19, 24, 0.98));
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.22);
}

/* ── Error ──────────────────────────────────────────────────────────────────── */

.svgcenter-error {
    border-color: rgba(248, 113, 113, 0.36);
    background:
        radial-gradient(circle at top left, rgba(248, 113, 113, 0.12), transparent 26rem),
        linear-gradient(180deg, rgba(35, 18, 22, 0.98), rgba(20, 12, 14, 0.98));
    padding: 0.85rem 1rem;
}

.svgcenter-error strong { color: #fecaca; }
.svgcenter-error p      { color: #fca5a5; margin: 0.22rem 0 0; font-size: 0.85rem; }

.svgcenter-error[hidden] { display: none !important; }

/* ── Hero ───────────────────────────────────────────────────────────────────── */

.svgcenter-hero {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem;
    overflow: hidden;
}

.svgcenter-hero__copy { max-width: 820px; }

.svgcenter-eyebrow,
.svgcenter-card-kicker {
    color: var(--accent-light);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.svgcenter-hero h2 {
    margin-top: 0.22rem;
    font-size: clamp(1.45rem, 2.7vw, 2.3rem);
    line-height: 1.04;
    letter-spacing: -0.055em;
}

.svgcenter-hero p {
    max-width: 760px;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.svgcenter-hero__panel {
    display: flex;
    min-width: 270px;
    align-content: center;
    justify-content: flex-end;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.svgcenter-hero__panel span,
.svgcenter-signal-strip span {
    border: 1px solid rgba(129, 140, 248, 0.24);
    border-radius: 999px;
    background: var(--accent-dim);
    color: var(--accent-light);
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1;
    padding: 0.45rem 0.65rem;
    white-space: nowrap;
}

/* ── Actions ────────────────────────────────────────────────────────────────── */

.svgcenter-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
    padding: 0.75rem;
}

.svgcenter-dropzone {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
    min-height: 74px;
    border: 1px dashed rgba(129, 140, 248, 0.36);
    border-radius: 15px;
    background: rgba(99, 102, 241, 0.08);
    padding: 0.75rem;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.svgcenter-dropzone.is-dragover {
    border-color: var(--accent-light);
    background: rgba(99, 102, 241, 0.16);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.16);
}

.svgcenter-dropzone strong,
.svgcenter-dropzone span { display: block; }

.svgcenter-dropzone strong {
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: -0.02em;
}

.svgcenter-dropzone span {
    margin-top: 0.12rem;
    color: var(--text-muted);
    font-size: 0.78rem;
}

.svgcenter-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.svgcenter-action-buttons {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    flex-wrap: wrap;
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */

.svgcenter-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 40px;
    border: 1px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    font: inherit;
    font-size: 0.84rem;
    font-weight: 850;
    line-height: 1;
    padding: 0.65rem 0.9rem;
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.svgcenter-button:hover:not(:disabled) { transform: translateY(-1px); }
.svgcenter-button:disabled { cursor: not-allowed; opacity: 0.48; }

.svgcenter-button--primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    box-shadow: 0 14px 32px rgba(99, 102, 241, 0.28);
}

.svgcenter-button--primary:hover:not(:disabled) {
    box-shadow: 0 18px 36px rgba(99, 102, 241, 0.36);
}

.svgcenter-button--soft {
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent-light);
    border-color: rgba(99, 102, 241, 0.25);
}

.svgcenter-button--soft:hover:not(:disabled) {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.4);
}

.svgcenter-button--ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border);
}

.svgcenter-button--ghost:hover:not(:disabled) {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.svgcenter-button[hidden] { display: none !important; }

/* ── Stats ──────────────────────────────────────────────────────────────────── */

.svgcenter-stats {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0;
    padding: 0;
    overflow: hidden;
}

.svgcenter-stat {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.9rem 1rem;
    border-right: 1px solid var(--border);
}

.svgcenter-stat:last-child { border-right: none; }

.svgcenter-stat span {
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    line-height: 1.2;
}

.svgcenter-stat strong {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.04em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.svgcenter-stat--accent { background: rgba(99, 102, 241, 0.06); }
.svgcenter-stat--accent strong { color: var(--accent-light); }

/* ── Card headers ───────────────────────────────────────────────────────────── */

.svgcenter-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 0.95rem 0.7rem;
}

.svgcenter-card-header h3 {
    margin-top: 0.12rem;
    font-size: 1rem;
    letter-spacing: -0.03em;
}

.svgcenter-card-header p {
    max-width: 510px;
    color: var(--text-muted);
    font-size: 0.78rem;
}

.svgcenter-card-header--preview { align-items: center; }

/* ── Preview card ────────────────────────────────────────────────────────────── */

.svgcenter-preview-card { padding: 0; overflow: hidden; }

.svgcenter-preview-tools {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    flex-wrap: wrap;
}

.svgcenter-preview-tools button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    font: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
    white-space: nowrap;
}

.svgcenter-preview-tools button:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

.svgcenter-preview-tools button.is-active,
.svgcenter-preview-tools button[aria-pressed="true"] {
    border-color: rgba(129, 140, 248, 0.5);
    color: var(--accent-light);
    background: var(--accent-dim);
}

.svgcenter-preview-grid {
    display: grid;
    min-height: 260px;
}

.svgcenter-preview-grid.is-split {
    grid-template-columns: 1fr 1fr;
}

.svgcenter-preview-grid.is-split [data-svgcenter-pane="original"] {
    border-right: 1px solid var(--border);
}

.svgcenter-preview-grid.is-original { grid-template-columns: 1fr; }
.svgcenter-preview-grid.is-original [data-svgcenter-pane="centered"] { display: none; }

.svgcenter-preview-grid.is-centered { grid-template-columns: 1fr; }
.svgcenter-preview-grid.is-centered [data-svgcenter-pane="original"] { display: none; }

.svgcenter-preview-pane {
    display: flex;
    flex-direction: column;
    min-height: 260px;
}

.svgcenter-pane-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.85rem;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
    background: rgba(0, 0, 0, 0.1);
}

.svgcenter-pane-label strong {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.svgcenter-preview-surface {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow: hidden;
    position: relative;
}

.svgcenter-preview-surface p {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}

.svgcenter-preview-surface svg {
    max-width: 100%;
    max-height: 280px;
    display: block;
}

.svgcenter-preview-grid.is-grid-visible .svgcenter-preview-surface {
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Center pane shows a checkerboard to highlight transparent areas */
.svgcenter-centered-preview {
    background-image:
        linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.04) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.04) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.04) 75%);
    background-size: 14px 14px;
    background-position: 0 0, 0 7px, 7px -7px, -7px 0;
}

/* ── Signal strip ────────────────────────────────────────────────────────────── */

.svgcenter-signal-strip {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    border-top: 1px solid var(--border);
    padding: 0.75rem;
}

/* ── Workspace ───────────────────────────────────────────────────────────────── */

.svgcenter-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(290px, 0.72fr);
    gap: 1rem;
    align-items: start;
}

.svgcenter-code-card,
.svgcenter-settings,
.svgcenter-output-card { overflow: hidden; min-width: 0; }

.svgcenter-output-card { grid-column: 1 / -1; }

/* ── Card headers in narrow panels ──────────────────────────────────────────── */

.svgcenter-settings .svgcenter-card-header {
    flex-direction: column;
    gap: 0.3rem;
    border-bottom: 1px solid var(--border);
}

.svgcenter-settings .svgcenter-card-header p {
    max-width: none;
    font-size: 0.75rem;
    line-height: 1.45;
}

/* ── Section headers inside settings ────────────────────────────────────────── */

.svgcenter-section-header {
    padding: 0.6rem 0.95rem 0.3rem;
    font-size: 0.67rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

/* ── Alignment mode radio options ────────────────────────────────────────────── */

.svgcenter-mode-options {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    padding: 0.5rem 0.95rem 0.75rem;
}

.svgcenter-radio {
    display: flex;
    flex-direction: column;
    gap: 0.18rem;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    position: relative;
}

.svgcenter-radio:has(input:checked) {
    border-color: rgba(129, 140, 248, 0.5);
    background: rgba(99, 102, 241, 0.07);
}

.svgcenter-radio:hover {
    border-color: var(--border-hover);
}

.svgcenter-radio input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.svgcenter-radio span {
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--text-primary);
    pointer-events: none;
}

.svgcenter-radio small {
    font-size: 0.74rem;
    color: var(--text-muted);
    line-height: 1.4;
    pointer-events: none;
}

/* ── Toggles ─────────────────────────────────────────────────────────────────── */

.svgcenter-toggles {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0.95rem 0.75rem;
}

.svgcenter-toggle {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    margin-bottom: 0.45rem;
    position: relative;
}

.svgcenter-toggle:last-child { margin-bottom: 0; }

.svgcenter-toggle:has(input:checked) {
    border-color: rgba(129, 140, 248, 0.5);
    background: rgba(99, 102, 241, 0.07);
}

.svgcenter-toggle:hover {
    border-color: var(--border-hover);
}

.svgcenter-toggle input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.svgcenter-toggle span {
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--text-primary);
    pointer-events: none;
}

/* ── Preserve note ───────────────────────────────────────────────────────────── */

.svgcenter-preserve-note {
    margin: 0 0.95rem 0.75rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.04);
}

.svgcenter-preserve-note strong {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.28rem;
}

.svgcenter-preserve-note span {
    font-size: 0.74rem;
    color: var(--text-muted);
    line-height: 1.55;
    display: block;
}

.svgcenter-preserve-note code {
    font-family: ui-monospace, "Cascadia Code", "Fira Code", monospace;
    font-size: 0.72rem;
    background: rgba(99, 102, 241, 0.12);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    color: var(--accent-light);
}

/* ── Output actions ──────────────────────────────────────────────────────────── */

.svgcenter-output-actions {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    padding: 0 0.95rem 0.95rem;
    margin-top: auto;
}

/* ── Textarea ────────────────────────────────────────────────────────────────── */

.svgcenter-textarea {
    display: block;
    width: 100%;
    min-height: 220px;
    resize: vertical;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.22);
    border: none;
    border-top: 1px solid var(--border);
    border-radius: 0 0 17px 17px;
    color: var(--text-primary);
    font-family: ui-monospace, "Cascadia Code", "Fira Code", monospace;
    font-size: 0.8rem;
    line-height: 1.55;
    outline: none;
    tab-size: 2;
    transition: background 0.15s;
    box-sizing: border-box;
}

.svgcenter-textarea:focus {
    background: rgba(0, 0, 0, 0.3);
}

.svgcenter-textarea::placeholder {
    color: var(--text-muted);
}

.svgcenter-textarea--output {
    color: var(--accent-light);
    background: rgba(0, 0, 0, 0.28);
    cursor: default;
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */

@media (max-width: 1120px) {
    .svgcenter-workspace {
        grid-template-columns: 1fr;
    }

    .svgcenter-settings { order: -1; }
    .svgcenter-output-card { grid-column: 1; }

    .svgcenter-output-actions {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

@media (max-width: 900px) {
    .svgcenter-hero { flex-direction: column; }

    .svgcenter-hero__panel {
        min-width: 0;
        justify-content: flex-start;
    }

    .svgcenter-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .svgcenter-stat:nth-child(3) { border-right: none; }
    .svgcenter-stat:nth-child(1),
    .svgcenter-stat:nth-child(2),
    .svgcenter-stat:nth-child(3) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 640px) {
    .svgcenter-actions,
    .svgcenter-dropzone,
    .svgcenter-card-header,
    .svgcenter-card-header--preview {
        align-items: stretch;
        flex-direction: column;
    }

    .svgcenter-card-header,
    .svgcenter-card-header--preview { display: flex; }

    .svgcenter-preview-grid.is-split {
        grid-template-columns: 1fr;
    }

    .svgcenter-preview-grid.is-split [data-svgcenter-pane="original"] {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .svgcenter-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .svgcenter-stat:nth-child(3) { border-right: 1px solid var(--border); }
    .svgcenter-stat:nth-child(2) { border-right: none; }
    .svgcenter-stat:nth-child(4) { border-right: none; }
    .svgcenter-stat:nth-child(1),
    .svgcenter-stat:nth-child(2),
    .svgcenter-stat:nth-child(3),
    .svgcenter-stat:nth-child(4) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 460px) {
    .svgcenter-action-buttons { flex-direction: column; align-items: stretch; }
    .svgcenter-action-buttons .svgcenter-button { width: 100%; }

    .svgcenter-hero,
    .svgcenter-actions,
    .svgcenter-stats,
    .svgcenter-preview-card,
    .svgcenter-code-card,
    .svgcenter-settings,
    .svgcenter-output-card { border-radius: 14px; }

    .svgcenter-stats { grid-template-columns: 1fr; }
    .svgcenter-stat { border-right: none; border-bottom: 1px solid var(--border); }
    .svgcenter-stat:last-child { border-bottom: none; }
}