:root {
    --bg-body: #F5F5F7;
    --bg-card: #FFFFFF;
    --text-main: #1D1D1F;
    --text-secondary: #86868b;
    --accent: #0071E3;
    --accent-hover: #0077ED;
    --border: #d2d2d7;
    --border-light: #e5e5ea;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.04);
    --shadow-lg: 0 12px 30px rgba(0,0,0,.08);
    --font-stack: 'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
}
[data-theme="dark"] {
    --bg-body: #000;
    --bg-card: #1c1c1e;
    --text-main: #F5F5F7;
    --text-secondary: #98989d;
    --accent: #2997FF;
    --accent-hover: #4CA9FF;
    --border: #38383A;
    --border-light: #2C2C2E;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.2);
    --shadow-lg: 0 12px 30px rgba(0,0,0,.3);
}
*{box-sizing:border-box;outline:none;-webkit-tap-highlight-color:transparent}
body{margin:0;font-family:var(--font-stack);background:var(--bg-body);color:var(--text-main);transition:background .3s,color .3s;min-height:100vh;display:flex;flex-direction:column}
header{width:100%;height:60px;background:var(--bg-card);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:0 24px;z-index:10}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text-main)}
.app-icon{width:32px;height:32px;background:var(--text-main);color:var(--bg-body);border-radius:8px;display:grid;place-items:center}
.app-name{font-weight:600;font-size:18px;letter-spacing:-.5px}
.header-controls{display:flex;gap:12px;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:50%;border:none;background:transparent;color:var(--text-main);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.icon-btn:hover{background:var(--border-light)}
.icon-btn svg{width:20px;height:20px}
.lang-dropdown{position:relative}
.lang-menu{position:absolute;top:50px;right:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);display:none;min-width:160px;overflow:hidden;z-index:200;max-height:320px;overflow-y:auto}
.lang-dropdown.open .lang-menu{display:block;animation:fadeIn .15s ease}
.lang-menu a{display:block;width:100%;padding:10px 16px;border:none;background:none;text-align:left;cursor:pointer;font-size:14px;color:var(--text-main);font-weight:500;text-decoration:none}
.lang-menu a:hover{background:var(--bg-body)}
.hero-text{text-align:center;max-width:600px;margin:40px auto 30px;padding:0 20px}
.hero-text h1{font-size:32px;font-weight:700;margin:0 0 12px;letter-spacing:-.8px}
.hero-text p{font-size:16px;color:var(--text-secondary);line-height:1.5;margin:0}
.app-wrapper{max-width:1200px;margin:0 auto 60px;padding:0 20px;width:100%}
.app-card{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border);display:grid;grid-template-columns:1fr 360px;overflow:hidden;min-height:600px}
.preview-panel{background:var(--bg-body);padding:24px;position:relative;display:flex;flex-direction:column;overflow:hidden;min-height:500px}
.upload-state{width:100%;height:100%;border:2px dashed var(--border);border-radius:var(--radius-md);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-secondary);cursor:pointer;transition:.2s;background:var(--bg-card);min-height:300px}
.upload-state:hover{border-color:var(--accent);color:var(--accent);background:rgba(0,113,227,.02)}
.upload-state.hidden{display:none}
.preview-container{width:100%;height:100%;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}
.preview-container::-webkit-scrollbar{width:6px}
.preview-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:20px}
.preview-status{font-size:12px;color:var(--text-secondary);text-align:center;padding:8px 0 12px;font-weight:500}
.preview-grid{display:grid;gap:14px;width:100%;padding-bottom:16px}
.preview-grid[data-imgs="1"]{grid-template-columns:1fr}
.preview-grid[data-imgs="1"] .grid-item{aspect-ratio:auto;max-height:100%}
.preview-grid[data-imgs="1"] .add-more-card{aspect-ratio:auto;height:60px}
.preview-grid[data-imgs="2"]{grid-template-columns:1fr 1fr}
.preview-grid[data-imgs="3"]{grid-template-columns:1fr 1fr 1fr}
.preview-grid[data-imgs="4"]{grid-template-columns:1fr 1fr}
.preview-grid[data-imgs="5"]{grid-template-columns:1fr 1fr 1fr}
.preview-grid[data-imgs="6"]{grid-template-columns:1fr 1fr 1fr}
.preview-grid[data-imgs="7"]{grid-template-columns:1fr 1fr 1fr}
.preview-grid[data-imgs="8"]{grid-template-columns:1fr 1fr 1fr 1fr}
.preview-grid[data-imgs="9"]{grid-template-columns:1fr 1fr 1fr}
.preview-grid[data-imgs="10"]{grid-template-columns:1fr 1fr 1fr 1fr}
.grid-item{position:relative;background:var(--bg-card);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);aspect-ratio:1;display:flex;align-items:center;justify-content:center;border:1px solid var(--border-light);transition:transform .2s;overflow:hidden;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:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}
.grid-item canvas{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;display:block}
.grid-item .remove{position:absolute;top:6px;right:6px;width:24px;height:24px;background:rgba(0,0,0,.65);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity .2s;z-index:10;border:none;padding:0}
.grid-item .remove svg{width:12px;height:12px;display:block}
.grid-item:hover .remove{opacity:1}
.add-more-card{display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px dashed var(--border);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);aspect-ratio:1;background:var(--bg-body);transition:.2s}
.add-more-card:hover{border-color:var(--accent);color:var(--accent);background:var(--bg-card)}
.add-more-card.hidden{display:none}
.controls-panel{background:var(--bg-card);padding:20px;border-left:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column;gap:0}
.control-group{margin-bottom:20px}
.label-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;gap:6px}
.label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary)}
.val-display{font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}
.info-tip{width:16px;height:16px;border-radius:50%;background:var(--border-light);color:var(--text-secondary);font-size:9px;font-weight:700;font-style:normal;display:inline-flex;align-items:center;justify-content:center;cursor:help;position:relative;flex-shrink:0;user-select:none;margin-left:4px;line-height:1}
.info-tip .tip-text{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--text-main);color:var(--bg-card);font-size:11px;font-weight:400;padding:8px 12px;border-radius:8px;white-space:normal;width:200px;text-align:center;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:100;line-height:1.4;text-transform:none;letter-spacing:0;box-shadow:0 4px 12px rgba(0,0,0,.2)}
.info-tip .tip-text::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);border:5px solid transparent;border-top-color:var(--text-main)}
.info-tip:hover .tip-text,.info-tip.show .tip-text{opacity:1;visibility:visible}
input[type=range]{-webkit-appearance:none;width:100%;background:transparent;cursor:pointer;padding:5px 0;touch-action:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;height:22px;width:22px;border-radius:50%;background:var(--bg-card);box-shadow:0 1px 4px rgba(0,0,0,.3);border:1px solid var(--border);margin-top:-9px}
input[type=range]::-webkit-slider-runnable-track{width:100%;height:4px;background:var(--border-light);border-radius:2px}
input[type=range]::-moz-range-thumb{height:22px;width:22px;border-radius:50%;background:var(--bg-card);box-shadow:0 1px 4px rgba(0,0,0,.3);border:1px solid var(--border);cursor:pointer}
input[type=range]::-moz-range-track{width:100%;height:4px;background:var(--border-light);border-radius:2px}
.chip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.chip{padding:7px 0;font-size:11px;text-align:center;border-radius:8px;background:var(--bg-body);color:var(--text-secondary);cursor:pointer;border:1px solid transparent;font-weight:500;transition:.2s;user-select:none}
.chip:hover{background:var(--border-light);color:var(--text-main)}
.chip.active{background:var(--text-main);color:var(--bg-card)}
.custom-inputs{display:none;gap:8px;margin-top:8px;animation:fadeIn .2s}
.custom-inputs.show{display:flex}
.custom-inputs input{width:50%;padding:8px;border-radius:8px;border:1px solid var(--border);background:var(--bg-body);color:var(--text-main);text-align:center;font-size:14px}
.toggle-row{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.toggle-btn{padding:8px;font-size:12px;text-align:center;border-radius:8px;background:var(--bg-body);color:var(--text-secondary);cursor:pointer;border:1px solid transparent;font-weight:600;transition:.2s;user-select:none}
.toggle-btn:hover{background:var(--border-light);color:var(--text-main)}
.toggle-btn.active{background:var(--text-main);color:var(--bg-card)}
.color-grid{display:flex;gap:10px;flex-wrap:wrap}
.color-dot{width:30px;height:30px;border-radius:50%;cursor:pointer;border:1px solid rgba(0,0,0,.1);position:relative;transition:transform .1s}
.color-dot:hover{transform:scale(1.05)}
.color-dot.active::after{content:'';position:absolute;inset:-3px;border:2px solid var(--accent);border-radius:50%}
.color-dot input{opacity:0;width:100%;height:100%;cursor:pointer}
.input-field{width:100%;padding:10px;border-radius:8px;border:1px solid var(--border);background:var(--bg-body);color:var(--text-main);font-size:14px;appearance:none}
.color-picker-row{display:flex;align-items:center;justify-content:space-between;background:var(--bg-body);padding:8px 12px;border-radius:8px}
details{border-top:1px solid var(--border);padding-top:14px;margin-top:4px}
summary{cursor:pointer;font-size:13px;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--text-main);user-select:none}
summary::after{content:'+';font-size:16px;font-weight:400;color:var(--text-secondary)}
details[open] summary::after{content:'−'}
details[open] .advanced-content{animation:fadeIn .2s}
.advanced-content{padding-top:14px}
.actions{margin-top:auto;padding-top:16px;display:grid;grid-template-columns:1fr 1.5fr;gap:10px}
.btn{padding:13px;border-radius:12px;font-weight:600;font-size:14px;cursor:pointer;border:none;text-align:center;transition:.2s;display:flex;align-items:center;justify-content:center;gap:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(0,113,227,.3)}
.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}
.btn-sec{background:var(--bg-body);color:var(--text-main)}
.btn-sec:hover{background:var(--border)}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;display:none}
.btn.loading .spinner{display:block}
.progress-text{font-size:12px;text-align:center;color:var(--text-secondary);padding-top:6px;min-height:20px}
.articles-section{max-width:760px;margin:0 auto;padding:0 20px 40px}
.articles-header{text-align:center;margin-bottom:48px}
.articles-header h2{font-size:28px;font-weight:700;letter-spacing:-.5px;margin:0 0 10px}
.articles-header p{font-size:15px;color:var(--text-secondary);margin:0;line-height:1.5}
.articles-list article{margin-bottom:32px;padding-bottom:32px;border-bottom:1px solid var(--border-light)}
.articles-list article:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.articles-list article h3{font-size:17px;font-weight:600;margin:0 0 8px;color:var(--text-main);line-height:1.4}
.articles-list article p{font-size:15px;color:var(--text-secondary);margin:0;line-height:1.75}
footer{border-top:1px solid var(--border);padding:40px 0;text-align:center;color:var(--text-secondary);font-size:13px;background:var(--bg-card);margin-top:40px}
.footer-links{display:flex;justify-content:center;gap:24px;margin-bottom:16px}
.footer-links a{color:var(--text-main);text-decoration:none;font-weight:500}
.footer-links a:hover{color:var(--accent)}
@keyframes fadeIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:850px){
    .app-card{grid-template-columns:1fr;height:auto;max-height:none}
    .controls-panel{border-left:none;border-top:1px solid var(--border);order:2;height:auto}
    .preview-panel{order:1;min-height:280px;max-height:55vh}
    .preview-grid[data-imgs="3"]{grid-template-columns:1fr 1fr}
    .preview-grid[data-imgs="5"]{grid-template-columns:1fr 1fr}
    .preview-grid[data-imgs="6"]{grid-template-columns:1fr 1fr}
    .preview-grid[data-imgs="7"]{grid-template-columns:1fr 1fr}
    .preview-grid[data-imgs="8"]{grid-template-columns:1fr 1fr}
    .preview-grid[data-imgs="9"]{grid-template-columns:1fr 1fr 1fr}
    .preview-grid[data-imgs="10"]{grid-template-columns:1fr 1fr 1fr}
    .hero-text h1{font-size:24px}
    .hero-text p{font-size:14px}
}