/* ============================================
   BMP to ICO Converter - stylef.css
   Blue theme (#3399cc), dark mode, bti- prefix
   ============================================ */

/* Tool Color Variables */
:root {
    --bti-primary: #3399cc;
    --bti-primary-dark: #2277aa;
    --bti-primary-light: rgba(51, 153, 204, 0.12);
    --bti-primary-xlight: rgba(51, 153, 204, 0.06);
    --bti-bg: #f8fafc;
    --bti-bg-elevated: #ffffff;
    --bti-text: #1e293b;
    --bti-text-secondary: #64748b;
    --bti-text-muted: #94a3b8;
    --bti-border: #e2e8f0;
    --bti-success: #339966;
    --bti-success-light: rgba(51, 153, 102, 0.1);
    --bti-danger: #e64e4e;
    --bti-danger-light: rgba(230, 78, 78, 0.08);
    --bti-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --bti-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --bti-shadow-lg: 0 10px 24px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
    --bti-primary: #5bb8e8;
    --bti-primary-dark: #3399cc;
    --bti-primary-light: rgba(91, 184, 232, 0.15);
    --bti-primary-xlight: rgba(91, 184, 232, 0.07);
    --bti-bg: #0f172a;
    --bti-bg-elevated: #1e293b;
    --bti-text: #f1f5f9;
    --bti-text-secondary: #cbd5e1;
    --bti-text-muted: #94a3b8;
    --bti-border: rgba(255,255,255,0.1);
    --bti-success: #4ade80;
    --bti-success-light: rgba(74, 222, 128, 0.1);
    --bti-danger: #f87171;
    --bti-danger-light: rgba(248, 113, 113, 0.1);
    --bti-shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --bti-shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --bti-shadow-lg: 0 10px 24px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bti-bg);
    color: var(--bti-text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.25s, color 0.25s;
}

/* ============================================
   TOOL HEADER
   ============================================ */
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.bti-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.bti-icon-wrap {
    width: 56px;
    height: 56px;
    background: var(--bti-primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
    box-shadow: var(--bti-shadow-md);
}

.bti-icon-wrap svg, .bti-icon-wrap i { width: 28px; height: 28px; }

.tool-title {
    font-size: clamp(1.6rem, 4vw, 2.25rem);
    font-weight: 700;
    margin: 0;
    color: var(--bti-primary);
    letter-spacing: -0.02em;
}

/* tool-description max-width handled by global custom_styles.css */

/* ============================================
   MAIN TOOL CARD
   ============================================ */
.bti-tool-main {
    background: var(--bti-bg-elevated);
    border-radius: 16px;
    box-shadow: var(--bti-shadow-lg);
    border: 1px solid var(--bti-border);
    overflow: hidden;
    position: relative;
    transition: background-color 0.25s, border-color 0.25s;
}

/* ============================================
   UPLOAD
   ============================================ */
.bti-upload-section { padding: 2.5rem; }

.bti-upload-area {
    border: 2px dashed var(--bti-border);
    border-radius: 12px;
    padding: 3.5rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.25s, background-color 0.25s, transform 0.2s;
    background: var(--bti-bg);
}

.bti-upload-area:hover, .bti-upload-area.dragover {
    border-color: var(--bti-primary);
    background: var(--bti-primary-xlight);
    transform: translateY(-2px);
}

.bti-upload-icon {
    color: var(--bti-primary);
    margin-bottom: 1.25rem;
    transition: transform 0.2s;
}

.bti-upload-area:hover .bti-upload-icon { transform: translateY(-4px); }
.bti-upload-icon svg, .bti-upload-icon i { width: 52px; height: 52px; }

.bti-upload-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--bti-text);
    margin: 0 0 0.4rem;
}

.bti-upload-subtitle { color: var(--bti-text-secondary); margin: 0 0 1rem; font-size: 0.9rem; }

.bti-upload-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bti-bg-elevated);
    color: var(--bti-text-muted);
    padding: 0.4rem 0.875rem;
    border-radius: 999px;
    font-size: 0.78rem;
    border: 1px solid var(--bti-border);
}

.bti-upload-hint svg, .bti-upload-hint i { width: 12px; height: 12px; }

/* ============================================
   FILE INFO BAR
   ============================================ */
.bti-file-info-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    padding: 0.875rem 1.75rem;
    background: var(--bti-bg);
    border-bottom: 1px solid var(--bti-border);
    transition: background-color 0.25s;
}

.bti-file-info-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--bti-text-secondary);
}

.bti-file-info-item svg, .bti-file-info-item i { color: var(--bti-primary); width: 15px; height: 15px; }

/* ============================================
   EDITOR GRID
   ============================================ */
.bti-editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    animation: btiSlideIn 0.3s ease;
}

.bti-preview-panel {
    padding: 1.75rem;
    background: var(--bti-bg);
    border-right: 1px solid var(--bti-border);
    transition: background-color 0.25s;
}

.bti-controls-panel { padding: 1.75rem; }

.bti-panel-header { margin-bottom: 1.25rem; }

.bti-panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bti-text);
    margin: 0;
}

.bti-panel-header h3 svg, .bti-panel-header h3 i { color: var(--bti-primary); width: 17px; height: 17px; }

.bti-preview-wrap {
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bti-img-box {
    background: var(--bti-bg-elevated);
    border: 1px solid var(--bti-border);
    border-radius: 10px;
    padding: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
}

.bti-img-box img { max-width: 100%; max-height: 240px; border-radius: 6px; display: block; }

.bti-preview-hint {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.75rem;
    padding: 0.55rem 0.75rem;
    background: var(--bti-primary-light);
    border-radius: 7px;
    font-size: 0.78rem;
    color: var(--bti-primary);
}

.bti-preview-hint svg, .bti-preview-hint i { width: 13px; height: 13px; }

/* ============================================
   CONTROLS
   ============================================ */
.bti-ctrl-group { margin-bottom: 1.375rem; }

.bti-ctrl-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--bti-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.625rem;
}

.bti-ctrl-label svg, .bti-ctrl-label i { width: 13px; height: 13px; color: var(--bti-primary); }
.bti-label-hint { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--bti-text-muted); }

.bti-sizes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.375rem;
}

.bti-size-cb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.5rem 0.3rem;
    background: var(--bti-bg);
    border: 1.5px solid var(--bti-border);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
    font-size: 0.73rem;
    user-select: none;
}

.bti-size-cb:hover { border-color: var(--bti-primary); background: var(--bti-primary-xlight); }
.bti-size-cb:has(input:checked) { border-color: var(--bti-primary); background: var(--bti-primary-light); }
.bti-size-cb input[type="checkbox"] { width: 12px; height: 12px; accent-color: var(--bti-primary); cursor: pointer; }
.bti-size-label { font-weight: 500; color: var(--bti-text); }

.bti-presets { display: flex; gap: 0.4rem; margin-top: 0.5rem; flex-wrap: wrap; }

.bti-preset-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.65rem;
    background: var(--bti-bg);
    border: 1px solid var(--bti-border);
    border-radius: 999px;
    font-size: 0.73rem;
    font-weight: 500;
    color: var(--bti-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.bti-preset-btn:hover { background: var(--bti-primary); color: #fff; border-color: var(--bti-primary); }
.bti-preset-btn svg, .bti-preset-btn i { width: 12px; height: 12px; }

.bti-quality-wrap { padding: 0.25rem 0; }

.bti-quality-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, #e64e4e, #f59e0b, #339966);
    outline: none;
}

.bti-quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bti-primary);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: transform 0.15s;
}

.bti-quality-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.bti-quality-slider::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--bti-primary); cursor: pointer; border: none; }

.bti-quality-labels { display: flex; justify-content: space-between; margin-top: 0.4rem; font-size: 0.7rem; color: var(--bti-text-muted); }
.bti-quality-val { font-weight: 600; color: var(--bti-primary); }

.bti-options-stack { display: flex; flex-direction: column; gap: 0.45rem; }

.bti-check-opt {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.7rem;
    background: var(--bti-bg);
    border: 1px solid var(--bti-border);
    border-radius: 7px;
    cursor: pointer;
    font-size: 0.83rem;
    color: var(--bti-text);
    transition: border-color 0.2s, background-color 0.2s;
    user-select: none;
}

.bti-check-opt:hover { border-color: var(--bti-primary); background: var(--bti-primary-xlight); }
.bti-check-opt:has(input:checked) { border-color: var(--bti-primary); background: var(--bti-primary-light); }
.bti-check-opt input[type="checkbox"] { width: 14px; height: 14px; accent-color: var(--bti-primary); cursor: pointer; }
.bti-check-opt .bti-opt-icon { width: 14px; height: 14px; color: var(--bti-text-muted); flex-shrink: 0; }
.bti-check-opt:has(input:checked) .bti-opt-icon { color: var(--bti-primary); }

.bti-opt-row { display: flex; align-items: center; gap: 0.75rem; }

.bti-opt-row label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--bti-text-secondary);
    min-width: 95px;
    white-space: nowrap;
}

.bti-opt-row label svg, .bti-opt-row label i { width: 13px; height: 13px; color: var(--bti-primary); }

.bti-select {
    flex: 1;
    padding: 0.5rem 0.7rem;
    border-radius: 6px;
    border: 1px solid var(--bti-border);
    background-color: var(--bti-bg-elevated);
    color: var(--bti-text);
    font-size: 0.8rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.2em 1.2em;
    cursor: pointer;
    transition: border-color 0.2s;
}

.bti-select:hover { border-color: var(--bti-primary); }
.bti-select:focus { outline: none; border-color: var(--bti-primary); box-shadow: 0 0 0 3px var(--bti-primary-light); }

/* ============================================
   ACTION BAR
   ============================================ */
.bti-action-bar {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.25rem 1.75rem;
    background: var(--bti-bg);
    border-top: 1px solid var(--bti-border);
    transition: background-color 0.25s;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 9px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

.btn svg, .btn i { width: 16px; height: 16px; }

.btn-primary { background: var(--bti-primary); color: #fff; box-shadow: 0 3px 10px rgba(51,153,204,0.28); }
.btn-primary:hover { background: var(--bti-primary-dark); transform: translateY(-1px); box-shadow: 0 5px 14px rgba(51,153,204,0.38); }

.btn-lg { padding: 0.875rem 1.625rem; font-size: 1rem; }
.btn-lg svg, .btn-lg i { width: 19px; height: 19px; }

.btn-secondary { background: var(--bti-bg); color: var(--bti-text-secondary); border: 1px solid var(--bti-border); }
.btn-secondary:hover { color: var(--bti-text); border-color: var(--bti-text-muted); }

.btn-outline { background: transparent; color: var(--bti-primary); border: 1.5px solid var(--bti-primary); }
.btn-outline:hover { background: var(--bti-primary); color: #fff; }

/* ============================================
   PROCESSING OVERLAY
   ============================================ */
.bti-processing-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

[data-theme="dark"] .bti-processing-overlay { background: rgba(15,23,42,0.92); }

.bti-processing-content { text-align: center; padding: 2rem; }
.bti-spinner { color: var(--bti-primary); margin-bottom: 1.125rem; }
.bti-spinner svg, .bti-spinner i { width: 42px; height: 42px; }
.bti-spin { animation: btiSpin 0.85s linear infinite; }

@keyframes btiSpin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.bti-proc-status { font-size: 0.95rem; font-weight: 500; color: var(--bti-text); margin: 0 0 1.125rem; }

.bti-progress-wrap { width: 260px; max-width: 100%; height: 5px; background: var(--bti-border); border-radius: 3px; overflow: hidden; margin: 0 auto 0.5rem; }

.bti-progress-bar { height: 100%; background: var(--bti-primary); width: 0%; transition: width 0.3s ease; border-radius: 3px; }
.bti-progress-text { font-size: 0.75rem; color: var(--bti-text-muted); }

/* ============================================
   RESULTS
   ============================================ */
.bti-results {
    padding: 2.5rem;
    text-align: center;
    animation: btiSlideIn 0.35s ease;
}

.bti-success-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 1.25rem;
    background: var(--bti-success-light);
    border-radius: 999px;
    color: var(--bti-success);
    margin-bottom: 1.75rem;
}

.bti-success-badge svg, .bti-success-badge i { width: 22px; height: 22px; flex-shrink: 0; }
.bti-success-badge h2 { margin: 0; font-size: 1.1rem; font-weight: 600; }

.bti-result-info {
    background: var(--bti-bg);
    border-radius: 10px;
    padding: 0.875rem 1.125rem;
    margin: 0 auto 1.75rem;
    max-width: 360px;
    border: 1px solid var(--bti-border);
}

.bti-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--bti-border);
    font-size: 0.875rem;
}

.bti-result-row:last-child { border-bottom: none; }

.bti-result-row span:first-child {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--bti-text-secondary);
}

.bti-result-row span:first-child svg,
.bti-result-row span:first-child i { width: 13px; height: 13px; }

.bti-result-row span:last-child { font-weight: 600; color: var(--bti-text); }

.bti-result-actions { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }

/* ============================================
   ERROR
   ============================================ */
.bti-error {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin: 1.25rem 1.75rem;
    padding: 1rem 1.125rem;
    background: var(--bti-danger-light);
    border: 1px solid var(--bti-danger);
    border-radius: 10px;
    color: var(--bti-danger);
    font-size: 0.875rem;
    line-height: 1.55;
}

.bti-error svg, .bti-error i { flex-shrink: 0; width: 17px; height: 17px; margin-top: 1px; }
.bti-error a { color: var(--bti-primary); text-decoration: underline; }

/* ============================================
   RELATED TOOLS BOX
   ============================================ */
.bti-related-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1rem 1.25rem;
    background: var(--bti-bg-elevated);
    border-radius: 12px;
    border: 1px solid var(--bti-border);
    flex-wrap: wrap;
    transition: background-color 0.25s;
}

.bti-related-label {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-weight: 600;
    color: var(--bti-text);
    font-size: 0.82rem;
    white-space: nowrap;
}

.bti-related-label svg, .bti-related-label i { color: var(--bti-primary); width: 14px; height: 14px; }

.bti-related-links { display: flex; gap: 0.45rem; flex-wrap: wrap; }

.bti-related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.375rem 0.7rem;
    background: var(--bti-bg);
    border: 1px solid var(--bti-border);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--bti-text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.bti-related-link:hover { background: var(--bti-primary); color: #fff; border-color: var(--bti-primary); }
.bti-related-link svg, .bti-related-link i { width: 11px; height: 11px; }

/* ============================================
   INFO SECTIONS (below tool)
   ============================================ */
.bti-info-sections { display: flex; flex-direction: column; gap: 1.375rem; margin-top: 2rem; }

.bti-info-card {
    border-radius: 14px;
    padding: 1.75rem;
    border: 1px solid var(--bti-border);
    background: var(--bti-bg-elevated);
    transition: background-color 0.25s, border-color 0.25s;
}

.bti-info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.15rem;
    color: var(--bti-text);
    margin: 0 0 1.125rem;
}

.bti-info-card h2 svg, .bti-info-card h2 i { color: var(--bti-primary); width: 20px; height: 20px; flex-shrink: 0; }

.bti-info-card p {
    color: var(--bti-text-secondary);
    line-height: 1.7;
    margin: 0 0 0.75rem;
    font-size: 0.92rem;
}

.bti-info-card p:last-child { margin-bottom: 0; }
.bti-info-card a { color: var(--bti-primary); text-decoration: none; font-weight: 500; }
.bti-info-card a:hover { text-decoration: underline; }

/* Steps */
.bti-steps { list-style: none; padding: 0; margin: 0; counter-reset: bti-step; }

.bti-steps li {
    position: relative;
    padding-left: 3.125rem;
    padding-bottom: 1.125rem;
    counter-increment: bti-step;
}

.bti-steps li:not(:last-child)::after {
    content: '';
    position: absolute;
    left: calc(1rem - 1px);
    top: 2.125rem;
    bottom: 0;
    width: 2px;
    background: var(--bti-primary-light);
}

.bti-steps li::before {
    content: counter(bti-step);
    position: absolute;
    left: 0; top: 0;
    width: 2rem; height: 2rem;
    background: var(--bti-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.78rem;
    z-index: 1;
}

.bti-step-title { display: block; color: var(--bti-text); font-weight: 600; margin-bottom: 0.2rem; font-size: 0.92rem; }
.bti-step-desc { margin: 0; color: var(--bti-text-secondary); font-size: 0.87rem; }

/* Tip */
.bti-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.825rem 1rem;
    background: var(--bti-primary-xlight);
    border-radius: 8px;
    margin-top: 1.125rem;
    font-size: 0.85rem;
    color: var(--bti-text-secondary);
    line-height: 1.55;
}

.bti-tip svg, .bti-tip i { color: var(--bti-primary); width: 15px; height: 15px; flex-shrink: 0; margin-top: 2px; }
.bti-tip a { color: var(--bti-primary); text-decoration: none; font-weight: 500; }
.bti-tip a:hover { text-decoration: underline; }

/* Mode tags */
.bti-modes { display: grid; gap: 0.825rem; }

.bti-mode-row { display: flex; align-items: flex-start; gap: 0.825rem; }

.bti-mode-tag {
    flex-shrink: 0;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.bti-mode-tag svg, .bti-mode-tag i { width: 10px; height: 10px; }
.bti-mode-tag.favicon { background: #3399cc; }
.bti-mode-tag.desktop { background: #339966; }
.bti-mode-tag.all-sizes { background: #8b5cf6; }

.bti-mode-row p { margin: 0; font-size: 0.88rem; color: var(--bti-text-secondary); line-height: 1.55; padding-top: 0.2rem; }

/* FAQ - uses global .faq-item.open from _footer.php */
.bti-faq-list { display: grid; gap: 0.6rem; }

.faq-item { border: 1px solid var(--bti-border); border-radius: 9px; overflow: hidden; transition: border-color 0.2s; }
.faq-item.open { border-color: var(--bti-primary); }

.faq-question {
    width: 100%;
    padding: 0.825rem 1rem;
    background: var(--bti-bg);
    border: none;
    text-align: left;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--bti-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s;
}

.faq-question:hover { background: var(--bti-primary-xlight); }
.faq-question svg, .faq-question i { color: var(--bti-primary); flex-shrink: 0; width: 17px; height: 17px; transition: transform 0.3s; }
.faq-item.open .faq-question svg, .faq-item.open .faq-question i { transform: rotate(180deg); }

.faq-answer { display: none; padding: 0 1rem 0.825rem; background: var(--bti-bg-elevated); }
.faq-item.open .faq-answer { display: block; }

.faq-answer p { margin: 0; color: var(--bti-text-secondary); font-size: 0.875rem; line-height: 1.7; }
.faq-answer a { color: var(--bti-primary); text-decoration: none; font-weight: 500; }
.faq-answer a:hover { text-decoration: underline; }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes btiSlideIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 880px) {
    .bti-editor-grid { grid-template-columns: 1fr; }
    .bti-preview-panel { border-right: none; border-bottom: 1px solid var(--bti-border); }
    .bti-file-info-bar { justify-content: center; }
}

@media (max-width: 768px) {
    .bti-upload-section, .bti-results { padding: 1.75rem 1.25rem; }
    .bti-preview-panel, .bti-controls-panel { padding: 1.25rem; }
    .bti-action-bar { flex-direction: column; padding: 1.25rem; }
    .btn { width: 100%; }
    .bti-related-box { flex-direction: column; }
    .bti-related-links { justify-content: center; }
    .bti-sizes-grid { grid-template-columns: repeat(2, 1fr); }
    .bti-opt-row { flex-direction: column; align-items: stretch; gap: 0.4rem; }
    .bti-opt-row label { min-width: auto; }
    .bti-mode-row { flex-direction: column; gap: 0.5rem; }
}

@media (max-width: 480px) {
    .bti-title-row { gap: 0.625rem; }
    .bti-icon-wrap { width: 44px; height: 44px; border-radius: 10px; }
    .bti-icon-wrap svg, .bti-icon-wrap i { width: 22px; height: 22px; }
    .bti-file-info-bar { flex-direction: column; gap: 0.5rem; align-items: flex-start; }
    .bti-progress-wrap { width: 100%; }
    .bti-result-actions { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================
   CROP FEATURE
   ============================================ */
.bti-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.bti-crop-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    background: var(--bti-bg);
    border: 1.5px solid var(--bti-border);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--bti-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.bti-crop-toggle-btn:hover {
    border-color: var(--bti-primary);
    color: var(--bti-primary);
}

.bti-crop-toggle-btn.active {
    background: var(--bti-primary);
    border-color: var(--bti-primary);
    color: #fff;
}

.bti-crop-toggle-btn svg,
.bti-crop-toggle-btn i { width: 13px; height: 13px; }

/* Crop container - relative so canvas overlays img */
.bti-crop-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--bti-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bti-bg-elevated);
    max-width: 100%;
}

.bti-preview-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    background: var(--bti-bg);
    border-radius: 10px;
    padding: 0.75rem;
}

#previewImage {
    display: block;
    max-width: 100%;
    max-height: 240px;
    border-radius: 6px;
    object-fit: contain;
}

/* Crop canvas - absolute overlay on img */
#cropCanvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    display: none;
    cursor: crosshair;
    touch-action: none;
}

#cropCanvas.active { display: block; }

/* Crop controls below preview */
.bti-crop-controls {
    margin-top: 0.875rem;
    padding: 0.875rem;
    background: var(--bti-bg);
    border-radius: 9px;
    border: 1px solid var(--bti-border);
}

.bti-crop-inputs-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
    margin-bottom: 0.625rem;
}

.bti-crop-field {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.bti-crop-field label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--bti-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bti-crop-field input[type="number"] {
    width: 100%;
    padding: 0.35rem 0.4rem;
    border: 1px solid var(--bti-border);
    border-radius: 5px;
    background: var(--bti-bg-elevated);
    color: var(--bti-text);
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
    -moz-appearance: textfield;
}

.bti-crop-field input[type="number"]::-webkit-inner-spin-button,
.bti-crop-field input[type="number"]::-webkit-outer-spin-button { opacity: 0.5; }

.bti-crop-field input[type="number"]:focus {
    outline: none;
    border-color: var(--bti-primary);
    box-shadow: 0 0 0 2px var(--bti-primary-light);
}

.bti-crop-field span {
    font-size: 0.65rem;
    color: var(--bti-text-muted);
    text-align: center;
}

.bti-crop-ratio-row {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.bti-crop-ratio-label {
    font-size: 0.72rem;
    color: var(--bti-text-muted);
    font-weight: 600;
    margin-right: 0.1rem;
}

.bti-ratio-btn {
    padding: 0.25rem 0.55rem;
    background: var(--bti-bg-elevated);
    border: 1px solid var(--bti-border);
    border-radius: 5px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--bti-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.bti-ratio-btn:hover { border-color: var(--bti-primary); color: var(--bti-primary); }
.bti-ratio-btn.active { background: var(--bti-primary); border-color: var(--bti-primary); color: #fff; }

.bti-ratio-reset {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-left: auto;
    color: var(--bti-text-muted) !important;
    border-color: transparent !important;
    background: transparent !important;
}

.bti-ratio-reset:hover { color: var(--bti-danger) !important; }
.bti-ratio-reset svg, .bti-ratio-reset i { width: 11px; height: 11px; }

.bti-crop-info {
    margin: 0.5rem 0 0;
    font-size: 0.75rem;
    color: var(--bti-text-muted);
    font-style: italic;
}

/* ============================================
   CANVAS RESIZE FEATURE
   ============================================ */
.bti-ctrl-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.625rem;
}

.bti-ctrl-label-row .bti-ctrl-label { margin-bottom: 0; }

/* Toggle pill */
.bti-toggle-pill {
    position: relative;
    display: inline-block;
    cursor: pointer;
    flex-shrink: 0;
}

.bti-toggle-pill input { display: none; }

.bti-toggle-track {
    display: block;
    width: 36px;
    height: 20px;
    background: var(--bti-border);
    border-radius: 999px;
    position: relative;
    transition: background 0.2s;
}

.bti-toggle-pill input:checked ~ .bti-toggle-track { background: var(--bti-primary); }

.bti-toggle-knob {
    position: absolute;
    top: 3px; left: 3px;
    width: 14px; height: 14px;
    background: #fff;
    border-radius: 50%;
    transition: left 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.bti-toggle-pill input:checked ~ .bti-toggle-track .bti-toggle-knob { left: 19px; }

/* Canvas controls body */
.bti-canvas-controls {
    padding: 0.875rem;
    background: var(--bti-bg);
    border-radius: 9px;
    border: 1px solid var(--bti-border);
    animation: btiSlideIn 0.2s ease;
}

.bti-wh-row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.bti-wh-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.bti-wh-field label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bti-text-muted);
}

.bti-wh-field input[type="number"] {
    width: 100%;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--bti-border);
    border-radius: 6px;
    background: var(--bti-bg-elevated);
    color: var(--bti-text);
    font-size: 0.85rem;
    font-weight: 600;
    -moz-appearance: textfield;
    transition: border-color 0.2s;
}

.bti-wh-field input[type="number"]::-webkit-inner-spin-button,
.bti-wh-field input[type="number"]::-webkit-outer-spin-button { opacity: 0.5; }

.bti-wh-field input[type="number"]:focus {
    outline: none;
    border-color: var(--bti-primary);
    box-shadow: 0 0 0 2px var(--bti-primary-light);
}

.bti-ratio-lock {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    background: var(--bti-bg-elevated);
    border: 1px solid var(--bti-border);
    border-radius: 6px;
    cursor: pointer;
    color: var(--bti-text-muted);
    transition: all 0.2s;
    flex-shrink: 0;
    margin-bottom: 1px;
}

.bti-ratio-lock:hover { border-color: var(--bti-primary); color: var(--bti-primary); }
.bti-ratio-lock.locked { background: var(--bti-primary-light); border-color: var(--bti-primary); color: var(--bti-primary); }
.bti-ratio-lock svg, .bti-ratio-lock i { width: 14px; height: 14px; }

/* Mode buttons */
.bti-mode-btns {
    display: flex;
    border: 1px solid var(--bti-border);
    border-radius: 7px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.bti-mode-btn {
    flex: 1;
    padding: 0.4rem 0.25rem;
    border: none;
    border-right: 1px solid var(--bti-border);
    background: var(--bti-bg-elevated);
    color: var(--bti-text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.bti-mode-btn:last-child { border-right: none; }
.bti-mode-btn:hover { background: var(--bti-primary-xlight); color: var(--bti-primary); }
.bti-mode-btn.active { background: var(--bti-primary); color: #fff; }

.bti-mode-desc {
    margin: 0;
    font-size: 0.72rem;
    color: var(--bti-text-muted);
    font-style: italic;
    line-height: 1.4;
}

/* ============================================
   BACKGROUND FILL FEATURE
   ============================================ */
.bti-bg-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.bti-bg-swatches {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.bti-swatch {
    width: 26px; height: 26px;
    border-radius: 6px;
    border: 2px solid var(--bti-border);
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.bti-swatch:hover { border-color: var(--bti-primary); transform: scale(1.1); }
.bti-swatch-active { border-color: var(--bti-primary) !important; box-shadow: 0 0 0 2px var(--bti-primary-light); }

/* Transparent checker */
.bti-swatch-checker {
    background-image: linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    background-color: #fff;
}

/* Custom color picker swatch */
.bti-swatch-custom {
    cursor: pointer;
    background: conic-gradient(red, yellow, lime, cyan, blue, magenta, red);
    border-color: var(--bti-border);
    position: relative;
    overflow: hidden;
}

.bti-swatch-custom input[type="color"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.bti-swatch-custom svg,
.bti-swatch-custom i {
    width: 12px; height: 12px;
    color: #fff;
    filter: drop-shadow(0 0 1px rgba(0,0,0,0.5));
    pointer-events: none;
    position: relative;
    z-index: 1;
}

.bti-bg-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--bti-text-secondary);
    white-space: nowrap;
}

.bti-bg-hint {
    margin: 0.375rem 0 0;
    font-size: 0.72rem;
    color: var(--bti-text-muted);
    font-style: italic;
}