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

:root{
  --bg:#0a0c12;
  --bg-surface:#10131a;
  --bg-card:#151820;
  --bg-card-hover:#1a1e28;
  --bg-inset:#0c0e14;
  --border:#1e2230;
  --border-hover:#2a3040;
  --text:#f0f1f5;
  --text-secondary:#a8adc0;
  --text-muted:#6a7088;
  --accent:#22d3ee;
  --accent-bold:#06b6d4;
  --accent-2:#34d399;
  --gradient:linear-gradient(135deg,#ef4444,#f97316,#eab308,#22c55e,#06b6d4,#3b82f6);
  --gradient-subtle:linear-gradient(135deg,rgba(239,68,68,.1),rgba(249,115,22,.08),rgba(34,197,94,.08),rgba(6,182,212,.1));
  --radius:14px;
  --radius-sm:10px;
  --radius-xs:6px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.3);
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --shadow-glow:0 0 40px rgba(6,182,212,.12);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --ease:cubic-bezier(.4,0,.2,1);
}

html{font-size:16px;-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column;line-height:1.6}
.container{max-width:960px;margin:0 auto;padding:0 24px;width:100%}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
code{font-family:'SF Mono',SFMono-Regular,Menlo,Consolas,monospace;font-size:.85em;background:var(--bg-inset);padding:2px 6px;border-radius:4px}
kbd{font-family:inherit;font-size:.85em;padding:2px 7px;border:1px solid var(--border);border-radius:4px;background:var(--bg-card)}

/* ===== HEADER ===== */
.header{border-bottom:1px solid var(--border);backdrop-filter:blur(16px);position:sticky;top:0;z-index:100;background:rgba(11,13,20,.8)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--text);font-weight:700;font-size:1.05rem;letter-spacing:-.02em}
.logo-icon{flex-shrink:0;border-radius:6px}
.logo-dot{background:linear-gradient(90deg,#22c55e,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.header-nav{display:flex;gap:24px}
.header-nav a{color:var(--text-secondary);text-decoration:none;font-size:.875rem;font-weight:500;transition:color .15s}
.header-nav a:hover{color:var(--text)}

/* ===== HERO ===== */
.hero{text-align:center;padding:56px 0 40px}
.hero h1{font-size:2.6rem;font-weight:800;letter-spacing:-.04em;line-height:1.15;background:linear-gradient(90deg,#ef4444,#f97316,#eab308,#22c55e,#06b6d4,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{margin-top:14px;color:var(--text-secondary);font-size:1.08rem;max-width:560px;margin-left:auto;margin-right:auto;line-height:1.65}
.subtitle strong{color:var(--text);font-weight:600}

/* ===== WORKSPACE ===== */
.workspace-section{padding-bottom:64px}
.workspace-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}

/* Left: drop zone */
.workspace-left{position:sticky;top:72px}
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--bg-card);cursor:pointer;transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .25s var(--ease);position:relative;overflow:hidden;min-height:300px;display:flex;align-items:center;justify-content:center;outline:none}
.drop-zone:hover,.drop-zone:focus-visible,.drop-zone.drag-over{border-color:var(--accent);background:var(--bg-card-hover);box-shadow:0 0 0 4px rgba(6,182,212,.1),var(--shadow-glow)}
.drop-zone-content{text-align:center;padding:40px 24px;pointer-events:none}
.drop-zone-content.is-hidden{display:none}
.drop-icon{color:var(--text-muted);margin-bottom:16px;opacity:.7}
.drop-text{font-size:.98rem;font-weight:500;margin-bottom:6px}
.drop-hint{color:var(--text-muted);font-size:.8rem}

/* Preview */
.preview-wrap{position:relative;width:100%;padding:28px 20px 24px;flex-direction:column;align-items:center;gap:14px;animation:fadeUp .35s var(--ease);display:none}
.preview-wrap.is-visible{display:flex}
.preview-device{display:flex;justify-content:center}
.preview-phone{display:flex;flex-direction:column;align-items:center;gap:6px}
.preview-squircle{width:120px;height:120px;border-radius:26.5%;overflow:hidden;box-shadow:var(--shadow),0 0 0 1px rgba(255,255,255,.06);transition:transform .2s var(--ease)}
.preview-squircle:hover{transform:scale(1.04)}
.preview-squircle img{width:100%;height:100%;object-fit:cover;display:block}
.preview-app-label{font-size:.72rem;color:var(--text-muted);letter-spacing:.01em}
.preview-meta{font-size:.78rem;color:var(--text-muted);text-align:center}
.btn-remove{position:absolute;top:10px;right:10px;width:28px;height:28px;border-radius:50%;border:1px solid var(--border);background:var(--bg-surface);color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s var(--ease)}
.btn-remove:hover{background:#ef4444;color:#fff;border-color:#ef4444;transform:scale(1.1)}

/* Alert */
.alert{align-items:flex-start;gap:8px;padding:10px 14px;margin-top:12px;border-radius:var(--radius-xs);font-size:.82rem;line-height:1.5;display:none}
.alert.is-visible{display:flex}
.alert svg{flex-shrink:0;margin-top:1px}
.alert-warning{background:rgba(234,179,8,.08);border:1px solid rgba(234,179,8,.2);color:#eab308}

/* ===== PLATFORM OPTIONS ===== */
.platform-group{border:none;margin-bottom:20px}
.platform-group-title{display:flex;align-items:center;gap:6px;font-size:.75rem;text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted);margin-bottom:10px;font-weight:600;padding:0}
.platform-group-title svg{opacity:.6}
.platform-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}

.platform-card{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:border-color .15s,background .15s;user-select:none}
.platform-card:hover{background:var(--bg-card-hover);border-color:var(--border-hover)}
.platform-card input[type="checkbox"]{display:none}

.check{width:18px;height:18px;border-radius:5px;border:2px solid var(--border);flex-shrink:0;position:relative;transition:all .15s var(--ease)}
.platform-card input:checked~.check{background:linear-gradient(135deg,#22c55e,#06b6d4);border-color:transparent}
.platform-card input:checked~.check::after{content:'';position:absolute;left:4.5px;top:1.5px;width:5.5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}

.platform-info{display:flex;flex-direction:column;gap:0;min-width:0}
.platform-info strong{font-size:.85rem;font-weight:600}
.platform-info span{font-size:.72rem;color:var(--text-muted)}

/* Field */
.field-inline{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm)}
.field-inline label{font-size:.8rem;color:var(--text-muted);white-space:nowrap;font-weight:500}
.field-inline input{background:var(--bg-inset);border:1px solid var(--border);border-radius:var(--radius-xs);color:var(--text);padding:5px 9px;font-size:.8rem;font-family:var(--font);width:100%;outline:none;transition:border-color .15s}
.field-inline input:focus{border-color:var(--accent)}

/* ===== GENERATE ===== */
.generate-section{margin-top:24px;text-align:center}
.btn-generate{position:relative;display:inline-flex;align-items:center;justify-content:center;width:100%;padding:14px 32px;font-size:.95rem;font-weight:600;font-family:var(--font);color:#fff;border:none;border-radius:50px;background:linear-gradient(135deg,#ef4444,#f97316,#eab308,#22c55e,#06b6d4);cursor:pointer;overflow:hidden;transition:opacity .2s,transform .1s,box-shadow .25s var(--ease);box-shadow:0 4px 20px rgba(6,182,212,.25)}
.btn-generate:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 32px rgba(34,197,94,.3)}
.btn-generate:active:not(:disabled){transform:translateY(0)}
.btn-generate:disabled{opacity:.3;cursor:not-allowed;box-shadow:none}
.btn-generate.generating{pointer-events:none}
.btn-progress{position:absolute;left:0;top:0;height:100%;background:rgba(255,255,255,.13);transition:width .12s ease;width:0;border-radius:50px}
.generate-hint{margin-top:10px;font-size:.78rem;color:var(--text-muted)}

/* ===== SIZES SECTION ===== */
.sizes-section{padding:64px 0;border-top:1px solid var(--border)}
.sizes-section h2{text-align:center;font-size:1.6rem;font-weight:700;letter-spacing:-.02em}
.section-subtitle{text-align:center;color:var(--text-secondary);margin-top:8px;margin-bottom:36px;font-size:.95rem}

.size-panel{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;overflow:hidden;background:var(--bg-card)}
.size-panel-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;cursor:pointer;user-select:none;transition:background .15s}
.size-panel-header:hover{background:var(--bg-card-hover)}
.size-panel-title{font-weight:600;font-size:.9rem}
.size-panel-count{font-size:.78rem;color:var(--text-muted)}
.size-panel-chevron{width:18px;height:18px;color:var(--text-muted);transition:transform .2s var(--ease)}
.size-panel.open .size-panel-chevron{transform:rotate(180deg)}
.size-panel-body{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.size-panel.open .size-panel-body{max-height:600px}
.size-table{width:100%;border-collapse:collapse;font-size:.8rem}
.size-table th{text-align:left;padding:8px 18px;font-weight:600;color:var(--text-muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border);background:var(--bg-inset)}
.size-table td{padding:7px 18px;border-bottom:1px solid rgba(34,37,57,.5);color:var(--text-secondary)}
.size-table tr:last-child td{border-bottom:none}

/* ===== FEATURES ===== */
.features-section{padding:64px 0;border-top:1px solid var(--border)}
.features-section h2{text-align:center;font-size:1.6rem;font-weight:700;letter-spacing:-.02em;margin-bottom:36px}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature-card{padding:24px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.feature-icon{width:40px;height:40px;border-radius:10px;background:var(--gradient-subtle);display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--accent)}
.feature-card h3{font-size:.95rem;font-weight:600;margin-bottom:6px}
.feature-card p{font-size:.82rem;color:var(--text-secondary);line-height:1.6}

/* ===== FAQ ===== */
.faq-section{padding:64px 0;border-top:1px solid var(--border)}
.faq-section h2{text-align:center;font-size:1.6rem;font-weight:700;letter-spacing:-.02em;margin-bottom:36px}
.faq-list{max-width:680px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;overflow:hidden;background:var(--bg-card)}
.faq-item summary{padding:16px 20px;font-weight:600;font-size:.9rem;cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;transition:background .15s}
.faq-item summary:hover{background:var(--bg-card-hover)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'';width:8px;height:8px;border-right:2px solid var(--text-muted);border-bottom:2px solid var(--text-muted);transform:rotate(45deg);transition:transform .2s var(--ease);flex-shrink:0;margin-left:16px}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-answer{padding:0 20px 16px;font-size:.85rem;color:var(--text-secondary);line-height:1.7}
.faq-answer p{margin-top:0}

/* ===== FOOTER ===== */
.footer{text-align:center;padding:28px 24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:.78rem;margin-top:auto}
.footer-inner{display:flex;flex-direction:column;gap:6px;align-items:center}
.footer-links a{color:var(--text-secondary);text-decoration:none;transition:color .15s}
.footer-links a:hover{color:var(--accent)}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  .workspace-grid{grid-template-columns:1fr;gap:24px}
  .workspace-left{position:static}
  .hero h1{font-size:1.8rem}
  .subtitle{font-size:.95rem}
  .hero{padding:36px 0 28px}
  .features-grid{grid-template-columns:1fr}
  .header-nav{gap:16px}
  .drop-zone{min-height:240px}
}
@media(max-width:480px){
  .hero h1{font-size:1.45rem}
  .platform-grid{grid-template-columns:1fr}
  .header-nav a{font-size:.8rem}
  .header-nav{gap:12px}
}