/* ===================================================================
   GG LaserPrep v7 — Main Stylesheet
   Fixes applied: removed orphaned closing bracket from v6, removed
   inline styles, added dedicated CSS classes throughout.
   =================================================================== */

:root {
    --bg-dark: #080a0d;
    --bg-panel: #0e1117;
    --bg-section: #131820;
    --bg-input: #070909;
    --accent: #ff4444;
    --accent-dim: rgba(255,68,68,0.15);
    --accent-glow: 0 0 20px rgba(255,68,68,0.4);
    --amber: #ffaa00;
    --amber-dim: rgba(255,170,0,0.15);
    --green: #00e676;
    --green-dim: rgba(0,230,118,0.15);
    --blue: #4a9eff;
    --blue-dim: rgba(74,158,255,0.15);
    --purple: #c084fc;
    --purple-dim: rgba(192,132,252,0.15);
    --cyan: #22d3ee;
    --cyan-dim: rgba(34,211,238,0.15);
    --text-main: #f0f0f0;
    --text-muted: #555;
    --text-mid: #888;
    --border: #1a1f2e;
    --border-hi: #252d3a;
    --glass: rgba(255,255,255,0.03);
    --radius: 10px;
    --radius-sm: 6px;
    --font-ui: 'DM Sans', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --transition: 0.15s ease;
}

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

body {
    background: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-ui);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ----- SCROLLBAR ----- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }

/* ----- NAV ----- */
nav {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: 0;
    display: flex;
    flex-direction: column;
    z-index: 10;
    position: relative;
}
nav::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.4;
}

.nav-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px 8px;
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.06em;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-logo-icon {
    width: 22px; height: 22px;
    position: relative;
    flex-shrink: 0;
}
.nav-logo-icon svg { width: 100%; height: 100%; }

.nav-version {
    color: var(--text-muted);
    font-weight: 300;
    font-size: 0.68rem;
    letter-spacing: 0.02em;
}

.laser-beam {
    animation: laserSweep 2.5s ease-in-out infinite;
    transform-origin: left center;
}
@keyframes laserSweep {
    0%, 100% { opacity: 1; transform: rotate(0deg); }
    50% { opacity: 0.4; transform: rotate(8deg); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(0.7); }
}

.nav-top-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.nav-buttons {
    display: flex;
    gap: 5px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 7px 12px;
    align-items: center;
    scrollbar-width: none;
}
.nav-buttons::-webkit-scrollbar { display: none; }

.nav-divider {
    width: 1px;
    height: 22px;
    background: var(--border-hi);
    flex-shrink: 0;
    margin: 0 3px;
}

/* ----- BUTTONS ----- */
button, label.btn {
    font-family: var(--font-ui);
    font-size: 0.76rem;
    font-weight: 500;
    background: #111623;
    color: #c0c8d8;
    border: 1px solid #1e2535;
    padding: 6px 11px;
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
    line-height: 1.4;
    letter-spacing: 0.01em;
    flex-shrink: 0;
    position: relative;
    overflow-x: hidden;
}
button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    transition: background 0.15s;
}
button:hover, label.btn:hover {
    background: #1a2236;
    border-color: #2e3f5a;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
button:active, label.btn:active {
    transform: scale(0.97) translateY(0);
    box-shadow: none;
}
button.primary {
    background: linear-gradient(135deg, var(--accent) 0%, #cc2222 100%);
    color: #fff;
    font-weight: 600;
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(255,68,68,0.3);
}
button.primary:hover {
    background: linear-gradient(135deg, #ff5555 0%, var(--accent) 100%);
    box-shadow: 0 4px 16px rgba(255,68,68,0.5);
}
button.active-toggle {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}
button.btn-amber {
    color: var(--amber);
    border-color: rgba(255,170,0,0.25);
    background: rgba(255,170,0,0.06);
}
button.btn-amber:hover {
    background: var(--amber-dim);
    border-color: var(--amber);
    box-shadow: 0 4px 12px rgba(255,170,0,0.25);
}
button.btn-green {
    color: var(--green);
    border-color: rgba(0,230,118,0.25);
    background: rgba(0,230,118,0.06);
}
button.btn-green:hover {
    background: var(--green-dim);
    border-color: var(--green);
    box-shadow: 0 4px 12px rgba(0,230,118,0.25);
}
button.btn-blue {
    color: var(--blue);
    border-color: rgba(74,158,255,0.25);
    background: rgba(74,158,255,0.06);
}
button.btn-blue:hover {
    background: var(--blue-dim);
    border-color: var(--blue);
    box-shadow: 0 4px 12px rgba(74,158,255,0.25);
}
button.btn-purple {
    color: var(--purple);
    border-color: rgba(192,132,252,0.25);
    background: rgba(192,132,252,0.06);
}
button.btn-purple:hover {
    background: var(--purple-dim);
    border-color: var(--purple);
    box-shadow: 0 4px 12px rgba(192,132,252,0.25);
}
button.btn-cyan {
    color: var(--cyan);
    border-color: rgba(34,211,238,0.25);
    background: rgba(34,211,238,0.06);
}
button.btn-cyan:hover {
    background: var(--cyan-dim);
    border-color: var(--cyan);
    box-shadow: 0 4px 12px rgba(34,211,238,0.25);
}

/* Smart MDF button */
button.btn-smart-mdf {
    background: linear-gradient(135deg, rgba(255,140,60,0.15) 0%, rgba(255,68,68,0.1) 100%);
    color: #ff9050;
    border-color: rgba(255,140,60,0.4);
    font-weight: 600;
}
button.btn-smart-mdf:hover {
    background: linear-gradient(135deg, rgba(255,140,60,0.25) 0%, rgba(255,68,68,0.18) 100%);
    border-color: #ff8c3c;
    box-shadow: 0 4px 16px rgba(255,140,60,0.35);
}
button.btn-smart-mdf::after {
    content: '⚡';
    margin-left: 4px;
}

/* Extended tools coloured buttons (replace inline styles) */
button.btn-save-config  { color: var(--blue);  border-color: #1a2a3a; }
button.btn-load-config  { color: var(--blue);  border-color: #1a2a3a; }
button.btn-est-time     { color: #80deea; border-color: #102030; }
button.btn-edge-mode    { color: #ce93d8; border-color: #2a1030; }
button.btn-vector-exp   { color: #ffab91; border-color: #3a2010; }

/* Simple mode button */
#btnSimpleMode {
    color: var(--green);
    border-color: #1a3a20;
    font-weight: 600;
}
#btnSimpleMode.simple-active {
    background: rgba(0,230,118,0.12);
    border-color: var(--green);
    color: var(--green);
    box-shadow: 0 0 10px rgba(0,230,118,0.2);
}

input[type="file"] { display: none; }

/* ----- FORM CONTROLS GLOBAL ----- */
input[type="number"],
input[type="text"],
select {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    background: #080c14;
    color: #e0e0e0;
    border: 1px solid #1a2235;
    border-radius: 6px;
    padding: 7px 10px;
    width: 100%;
    transition: border-color 0.15s, box-shadow 0.15s;
    appearance: none;
    -webkit-appearance: none;
    outline: none;
}
input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    border-color: var(--accent);
    background: #0d1220;
    box-shadow: 0 0 0 2px rgba(255,68,68,0.12);
}
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23555'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
    cursor: pointer;
}
select option, select optgroup {
    background: #0e1117;
    color: #e0e0e0;
}
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: #1a2235;
    border-radius: 2px;
    outline: none;
    accent-color: var(--accent);
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px; height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #0d0d0d;
    box-shadow: 0 0 6px rgba(255,68,68,0.4);
}
input[type="range"]::-moz-range-thumb {
    width: 16px; height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #0d0d0d;
}
input[type="checkbox"] {
    accent-color: var(--accent);
    width: 15px; height: 15px;
    cursor: pointer;
    flex-shrink: 0;
}

/* ----- WORKSPACE ----- */
.workspace {
    display: flex;
    flex-direction: column;
}

/* ----- PREVIEW ----- */
.preview-container {
    position: relative;
    background: #050810;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    touch-action: none;
    border-bottom: 1px solid var(--border);
    height: 55vw;
    min-height: 240px;
    max-height: 70vh;
}
.preview-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,68,68,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,68,68,0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
    animation: gridDrift 20s linear infinite;
}
@keyframes gridDrift {
    0% { background-position: 0 0; }
    100% { background-position: 30px 30px; }
}
.preview-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 40% at 50% 100%, rgba(255,68,68,0.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}
#previewCanvas {
    transform-origin: center center;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 2px;
    position: relative;
    z-index: 1;
    box-shadow: 0 0 40px rgba(0,0,0,0.8);
}

/* ----- CONTROLS PANEL ----- */
.controls {
    width: 100%;
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px 10px 40px 10px;
}
.drop-hint {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    color: var(--text-muted);
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 2;
}
.drop-hint svg { width: 56px; height: 56px; opacity: 0.2; }
.drop-hint-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    color: #333;
}
.drop-hint-sub {
    font-size: 0.7rem;
    color: #2a2a2a;
    letter-spacing: 0.06em;
}
.drop-hint.hidden { opacity: 0; }

.loader {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    z-index: 20;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.loader.visible { display: flex; }
.loader-ring {
    width: 36px; height: 36px;
    border: 2px solid rgba(255,68,68,0.15);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent);
    letter-spacing: 0.18em;
    animation: blink 1.2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

/* ----- OVERLAY TOOLS ----- */
.overlay-tools {
    position: absolute;
    bottom: 10px; right: 8px;
    display: flex;
    gap: 4px;
    z-index: 10;
    background: rgba(8,10,15,0.7);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-hi);
    border-radius: 8px;
    padding: 4px 5px;
}
.overlay-tools button {
    font-size: 0.65rem;
    padding: 4px 7px;
    border-radius: 4px;
    background: transparent;
    border-color: transparent;
    color: var(--text-muted);
}
.overlay-tools button:hover {
    background: rgba(255,255,255,0.06);
    color: var(--text-main);
    transform: none;
    box-shadow: none;
}
.tool-divider {
    width: 1px;
    background: var(--border-hi);
    margin: 2px 2px;
}

/* ----- SPLIT LABEL ----- */
.split-label {
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    background: rgba(0,0,0,0.7);
    padding: 3px 10px;
    border-radius: 3px;
    display: none;
    z-index: 12;
    pointer-events: none;
    white-space: nowrap;
}

/* ----- IMG STATS ----- */
.img-stats {
    position: absolute;
    top: 8px; left: 8px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-muted);
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(4px);
    padding: 4px 8px;
    border-radius: 4px;
    line-height: 1.5;
    z-index: 12;
    display: none;        /* shown via .img-stats--visible class */
    pointer-events: none;
    border: 1px solid var(--border);
}

/* ----- SECTIONS ----- */
.section {
    background: var(--bg-section);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.section.collapsed .section-body { display: none; }
.section.collapsed .chev { transform: rotate(-90deg); }

.section-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-mid);
    padding: 11px 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0d1220;
    transition: color 0.15s, background 0.15s;
    min-height: 44px;
}
.section-title:hover { color: var(--text-main); background: #111827; }
.section-title:active { background: #161e2e; }
.section-title .section-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.5;
    flex-shrink: 0;
    margin-right: 7px;
}
.section-title-inner { display: flex; align-items: center; gap: 0; }
.chev { transition: transform 0.2s ease; }

.section-body {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.77rem;
    color: #8899aa;
    font-weight: 500;
}
.control-header input[type="number"] {
    width: 58px;
    padding: 3px 6px;
    font-size: 0.72rem;
    text-align: right;
    border-radius: 4px;
    flex-shrink: 0;
}
.check-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: #8899aa;
    cursor: pointer;
    padding: 4px 0;
    user-select: none;
    transition: color 0.12s;
}
.check-label:hover { color: #fff; }
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}
.grid-2 button {
    width: 100%;
    text-align: center;
    font-size: 0.72rem;
    padding: 7px 6px;
    border-radius: 6px;
}
.estimation {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    background: #070a12;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    line-height: 1.6;
}

/* colour-coded section dots */
.section[data-type="size"]     .section-dot { background: var(--blue); }
.section[data-type="material"] .section-dot { background: var(--amber); }
.section[data-type="enhance"]  .section-dot { background: var(--green); }
.section[data-type="dither"]   .section-dot { background: var(--purple); }
.section[data-type="laser"]    .section-dot { background: var(--accent); }
.section[data-type="tools"]    .section-dot { background: var(--cyan); }

/* quick zoom slider overlay */
.zoom-slider-overlay {
    position: absolute;
    bottom: 80px; right: 12px;
    width: 120px;
    background: rgba(20,20,20,0.9);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-hi);
    border-radius: 20px;
    padding: 6px 12px;
    display: none;
    align-items: center;
    z-index: 15;
}
.zoom-slider-overlay input { width: 100%; accent-color: var(--accent); }

/* ----- MODAL ----- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 100;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(6px);
}
.modal-overlay.open { display: flex; }

.modal-content {
    background: #0d1117;
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius);
    border: 1px solid var(--border-hi);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    max-height: 88vh;
    animation: modalIn 0.2s ease;
    box-shadow: 0 20px 60px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,68,68,0.08);
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(12px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
    padding: 14px 16px;
    background: #0a0e18;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h2 {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.06em;
}
.modal-header button {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.3rem;
    padding: 0 4px;
    line-height: 1;
}
.modal-header button:hover {
    color: var(--text-main);
    background: transparent;
    transform: none;
    box-shadow: none;
}
.modal-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* ----- SIMPLE MODE ----- */
#simpleModeModal .modal-content { max-width: 400px; }

.simple-step {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.simple-step label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.simple-step select,
.simple-step input[type="number"] {
    font-size: 0.9rem;
    padding: 10px 12px;
    border-radius: 8px;
    width: 100%;
}
.simple-size-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 8px;
    align-items: end;
}
.simple-size-separator {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-bottom: 10px;
}
.simple-dim-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.simple-tip {
    font-size: 0.72rem;
    color: var(--text-muted);
}
.simple-footer-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.6;
    border-top: 1px solid var(--border);
    padding-top: 12px;
}
#btnSimpleGo {
    width: 100%;
    padding: 16px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    border-radius: 10px;
    margin-top: 6px;
}
.simple-status {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--green);
    min-height: 20px;
    letter-spacing: 0.08em;
}
.simple-steps-hint {
    display: flex;
    gap: 0;
    margin-bottom: 6px;
}
.simple-steps-hint .step-dot {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    position: relative;
    padding-bottom: 10px;
}
.simple-steps-hint .step-dot::before {
    content: attr(data-n);
    display: block;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--accent-dim);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 22px;
    margin: 0 auto 5px;
}
.simple-steps-hint .step-dot::after {
    content: '';
    position: absolute;
    top: 11px;
    left: calc(50% + 11px);
    right: calc(-50% + 11px);
    height: 1px;
    background: var(--border-hi);
}
.simple-steps-hint .step-dot:last-child::after { display: none; }

/* ----- TOAST ----- */
#toast {
    position: fixed;
    bottom: 80px; left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(14,17,23,0.95);
    border: 1px solid rgba(255,68,68,0.3);
    color: var(--text-main);
    padding: 9px 18px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
    z-index: 999;
    white-space: nowrap;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,68,68,0.1);
    letter-spacing: 0.04em;
}
#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* comparison slider */
#comparisonSlider {
    position: absolute;
    top: 0; bottom: 0;
    width: 2px;
    background: var(--accent);
    cursor: ew-resize;
    display: none;
    z-index: 15;
    box-shadow: var(--accent-glow);
}
#comparisonSlider::before {
    content: '◀ ▶';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--accent);
    color: #000;
    font-size: 0.6rem;
    padding: 4px 6px;
    border-radius: 4px;
    white-space: nowrap;
    font-weight: 700;
}

/* material overlay */
.material-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.4;
    mix-blend-mode: multiply;
    display: none;
}

/* dpi badge */
.dpi-badge {
    display: inline-block;
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 1px 5px;
    margin-left: 6px;
    vertical-align: middle;
}

/* drag-over highlight */
body.drag-over .preview-container {
    outline: 2px dashed var(--accent);
    outline-offset: -4px;
}
body.drag-over .preview-container::after {
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(255,68,68,0.08) 0%, transparent 70%);
}

/* pending export pulse */
#btnExport.pending { animation: exportPulse 1.5s ease-in-out infinite; }
@keyframes exportPulse {
    0%, 100% { box-shadow: 0 2px 8px rgba(255,68,68,0.3); }
    50% { box-shadow: 0 2px 20px rgba(255,68,68,0.7), 0 0 30px rgba(255,68,68,0.3); }
}

/* AI material select */
#aiMaterialSelect {
    width: auto;
    min-width: 130px;
    font-size: 0.75rem;
    padding: 6px 28px 6px 10px;
    border-radius: 6px;
    flex-shrink: 0;
}

/* ----- LIVE SLIDER VALUE HIGHLIGHT ----- */
.control-header .val-live {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-mid);
    min-width: 42px;
    text-align: right;
    transition: color 0.1s ease, text-shadow 0.1s ease;
    pointer-events: none;
    letter-spacing: 0.03em;
}
.control-header .val-live.active {
    color: var(--accent);
    text-shadow: 0 0 8px rgba(255,68,68,0.5);
}
.control-header.has-live-badge input[type="number"] { display: none; }

/* section title focus ring for keyboard nav */
.section-title:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}
button:focus-visible, label.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
input:focus-visible, select:focus-visible {
    outline: 2px solid var(--accent);
}

/* ----- KEYBOARD HELP PANEL ----- */
#kbHelp {
    position: fixed;
    bottom: 80px; right: 12px;
    background: rgba(8,12,20,0.97);
    border: 1px solid var(--border-hi);
    border-radius: 10px;
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-mid);
    z-index: 200;
    display: none;
    line-height: 2;
    backdrop-filter: blur(12px);
    min-width: 190px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.7);
}
#kbHelp.visible { display: block; }
#kbHelp .kb-title {
    color: var(--accent);
    font-size: 0.64rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 5px;
}
#kbHelp kbd {
    display: inline-block;
    background: #131b2a;
    border: 1px solid var(--border-hi);
    border-radius: 3px;
    padding: 1px 5px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--amber);
    margin-right: 8px;
    min-width: 22px;
    text-align: center;
}

/* ----- FEATURE LIST (about modal) ----- */
.feature-list { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.feature-list h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}
.feature-list ul { list-style: none; }
.feature-list li {
    margin-bottom: 10px;
    font-size: 0.84rem;
    color: #ccc;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.5;
}
.feature-list li::before { content: "▸"; color: var(--accent); flex-shrink: 0; margin-top: 1px; }
.feature-list li b { color: #fff; }

/* Worker status indicator */
.worker-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    color: var(--green);
    opacity: 0.7;
    letter-spacing: 0.06em;
}
.worker-badge::before {
    content: '';
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}

/* SVG logo pulse dot (replaces inline style) */
.logo-pulse {
    animation: pulse 1.8s infinite;
}

/* ── Progress bar inside loader ── */
.progress-bar-track {
    width: 120px;
    height: 3px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
}
.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.15s ease;
}
.progress-label {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-top: 3px;
    min-height: 10px;
    text-transform: uppercase;
}

/* ── Undo / Redo disabled state ── */
button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}
button:disabled:hover {
    transform: none;
    box-shadow: none;
    background: #111623;
    border-color: #1e2535;
}

/* ── Batch progress bar (above workspace, shown during batch) ── */
#batchProgressTrack {
    display: none;
}
#batchProgressTrack.active {
    display: block;
}

/* ── JS-driven visibility state classes (replace all style.display) ── */

/* Hidden controls (halftone, threshold panels) */
.ctrl-hidden {
    display: none !important;
}

/* Split label — shown when split view active */
.split-label--visible {
    display: block !important;
}

/* Comparison slider — shown when split view active */
.comparison-slider--visible {
    display: block !important;
}

/* Zoom overlay — shown briefly on touch */
.zoom-overlay--visible {
    display: flex !important;
}

/* Histogram overlay canvas — shown when toggled */
#histOverlay {
    position: absolute;
    bottom: 50px;
    left: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-hi);
    background: rgba(0,0,0,0.6);
    display: none;
    z-index: 12;
    pointer-events: none;
}
.hist-overlay--visible {
    display: block !important;
}

/* Img stats — shown once image loaded */
.img-stats--visible {
    display: block !important;
}

/* Stats text sizing helpers (replace inline font-size spans) */
.stats-src, .stats-name {
    color: var(--text-muted);
    font-size: 0.58rem;
    word-break: break-all;
    display: block;
}

/* ═══════════════════════════════════════════════════════════
   NEW FEATURE BUTTONS — v8 additions
═══════════════════════════════════════════════════════════ */
.btn-vector-trace { background: linear-gradient(135deg,#1a2a4a,#0a1a3a); color:#4fc3f7; border:1px solid #1565c0; }
.btn-vector-trace:hover { background:#1565c0; color:#fff; }
.btn-crop-rotate  { background: linear-gradient(135deg,#2a1a3a,#1a0a2a); color:#ce93d8; border:1px solid #7b1fa2; }
.btn-crop-rotate:hover  { background:#7b1fa2; color:#fff; }
.btn-bg-remove    { background: linear-gradient(135deg,#1a3a2a,#0a2a1a); color:#a5d6a7; border:1px solid #2e7d32; }
.btn-bg-remove:hover    { background:#2e7d32; color:#fff; }
.btn-gcode-export { background: linear-gradient(135deg,#3a2a1a,#2a1a0a); color:#ffcc80; border:1px solid #e65100; }
.btn-gcode-export:hover { background:#e65100; color:#fff; }

/* Wide modal variant */
.modal-wide { max-width: 560px; width: 95vw; }

/* Crop canvas cursor states */
#crCanvas.cr-dragging { cursor: move; }
#crCanvasWrap canvas { border-radius:4px; }

/* G-Code preview textarea */
#gcPreviewText { border-radius:4px; outline:none; }
#gcPreviewText:focus { border-color:var(--accent); }

/* VT preview canvas */
#vtPreviewCanvas { border-radius:4px; }