@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

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

:root{
  --bg:#0f0f13;
  --card:#1a1a2e;
  --card-hover:#222240;
  --border:#2a2a3e;
  --text:#e2e8f0;
  --text-muted:#94a3b8;
  --accent-1:#c026d3;
  --accent-2:#a21caf;
  --accent-3:#86198f;
  --gradient:linear-gradient(135deg,var(--accent-1),var(--accent-2),var(--accent-3));
  --gradient-text:linear-gradient(135deg,var(--accent-1),var(--accent-2));
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --font:'Inter',sans-serif;
  --mono:'JetBrains Mono',monospace;
}

html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}

a{color:var(--accent-1);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-2)}

.container{width:100%;max-width:900px;margin:0 auto;padding:0 20px}

nav{background:var(--card);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;z-index:100;backdrop-filter:blur(12px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.25rem;color:var(--text)}
.logo-icon{width:40px;height:40px;background:var(--gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:#fff}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{color:var(--text-muted);font-size:.9rem;font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--accent-1)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}

.hero{text-align:center;padding:60px 0 40px}
.hero h1{font-size:2.5rem;font-weight:800;margin-bottom:12px}
.hero h1 .gradient-text{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{color:var(--text-muted);font-size:1.1rem;max-width:600px;margin:0 auto}

.ad-slot{background:var(--card);border:1px dashed var(--border);border-radius:var(--radius-sm);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:.85rem;margin:24px 0;overflow:hidden}

.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:32px;box-shadow:var(--shadow)}

.upload-area{border:2px dashed var(--border);border-radius:var(--radius-sm);padding:48px 24px;text-align:center;cursor:pointer;transition:all .3s;margin-bottom:20px}
.upload-area:hover,.upload-area.dragover{border-color:var(--accent-1);background:rgba(255,255,255,.02)}
.upload-area .upload-icon{font-size:3rem;margin-bottom:12px}
.upload-area p{color:var(--text-muted);margin-bottom:8px}
.upload-area .upload-hint{font-size:.8rem;color:var(--text-muted);opacity:.7}
.upload-area input[type="file"]{display:none}

.file-info{display:none;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;margin-bottom:20px}
.file-info.show{display:flex;align-items:center;gap:16px}
.file-info .file-icon{font-size:2rem}
.file-info .file-details{flex:1}
.file-info .file-name{font-weight:600;font-size:.95rem}
.file-info .file-size{color:var(--text-muted);font-size:.85rem}
.file-info .file-remove{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:1.2rem;padding:4px 8px}
.file-info .file-remove:hover{color:#ef4444}

.options-row{display:flex;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.option-group{flex:1;min-width:200px}
.option-group label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:6px;font-weight:500}
.option-group select,.option-group input[type="number"]{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;color:var(--text);font-size:.9rem;font-family:var(--font);outline:none;cursor:pointer}
.option-group select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.option-group select:focus,.option-group input:focus{border-color:var(--accent-1)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 24px;border:none;border-radius:var(--radius-sm);font-family:var(--font);font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s;min-height:44px;min-width:44px}
.btn-primary{background:var(--gradient);color:#fff;width:100%;padding:16px;font-size:1.05rem}
.btn-primary:hover{opacity:.9;transform:translateY(-1px)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--accent-1);color:var(--accent-1)}

.progress-bar{display:none;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;height:8px;margin:16px 0}
.progress-bar.show{display:block}
.progress-bar .progress-fill{height:100%;background:var(--gradient);border-radius:var(--radius-sm);transition:width .3s;width:0%}

.status-msg{display:none;text-align:center;padding:12px;font-size:.9rem;border-radius:var(--radius-sm);margin:16px 0}
.status-msg.show{display:block}
.status-msg.loading{color:var(--text-muted)}
.status-msg.success{color:#22c55e;background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.2)}
.status-msg.error{color:#ef4444;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2)}

.result-area{display:none;margin-top:20px}
.result-area.show{display:block}
.result-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center}
.result-card .result-preview{max-width:100%;max-height:400px;border-radius:var(--radius-sm);margin-bottom:16px}
.result-card .result-info{display:flex;justify-content:center;gap:20px;margin-bottom:16px;flex-wrap:wrap}
.result-card .result-info span{color:var(--text-muted);font-size:.9rem}
.btn-download{background:var(--gradient);color:#fff;padding:14px 32px;font-size:1rem;text-decoration:none;display:inline-flex;align-items:center;gap:8px;border-radius:var(--radius-sm);font-weight:600;transition:all .2s;border:none;cursor:pointer}
.btn-download:hover{opacity:.9;transform:translateY(-1px);color:#fff}

.spinner{display:inline-block;width:20px;height:20px;border:3px solid var(--border);border-top:3px solid var(--accent-1);border-radius:50%;animation:spin .8s linear infinite;margin-right:8px;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}

.how-to{margin-top:20px}
.how-to h2{font-size:1.5rem;font-weight:700;margin-bottom:20px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center}
.step-number{width:36px;height:36px;background:var(--gradient);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;margin:0 auto 12px;color:#fff}
.step h3{font-size:.95rem;font-weight:600;margin-bottom:6px}
.step p{font-size:.85rem;color:var(--text-muted)}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:32px}
.feature{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center}
.feature-icon{font-size:1.8rem;margin-bottom:10px}
.feature h3{font-size:.95rem;font-weight:600;margin-bottom:4px}
.feature p{font-size:.85rem;color:var(--text-muted)}

.faq{margin-top:40px}
.faq h2{font-size:1.5rem;font-weight:700;margin-bottom:20px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;font-weight:600;font-size:.95rem;display:flex;justify-content:space-between;align-items:center;transition:background .2s}
.faq-q:hover{background:var(--card-hover)}
.faq-q::after{content:'+';font-size:1.2rem;color:var(--text-muted);transition:transform .2s}
.faq-item.open .faq-q::after{content:'-'}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;color:var(--text-muted);font-size:.9rem;line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}

footer{margin-top:auto;background:var(--card);border-top:1px solid var(--border);padding:32px 0}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-links{display:flex;gap:20px;list-style:none}
.footer-links a{color:var(--text-muted);font-size:.85rem}
.footer-links a:hover{color:var(--accent-1)}
.footer-copy{color:var(--text-muted);font-size:.85rem}

.page-content{padding:60px 0}
.page-content h1{font-size:2rem;font-weight:700;margin-bottom:24px}
.page-content h2{font-size:1.3rem;font-weight:600;margin-top:32px;margin-bottom:12px;color:var(--accent-1)}
.page-content p{color:var(--text-muted);margin-bottom:16px;line-height:1.8}
.page-content ul{color:var(--text-muted);margin-bottom:16px;padding-left:24px}
.page-content ul li{margin-bottom:8px}

.contact-form{display:flex;flex-direction:column;gap:16px;max-width:600px}
.contact-form input,.contact-form textarea{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;color:var(--text);font-size:.95rem;font-family:var(--font);outline:none;transition:border-color .2s}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--accent-1)}
.contact-form textarea{resize:vertical;min-height:150px}

.text-input-area{display:none;margin-bottom:20px}
.text-input-area.show{display:block}
.text-input-area textarea{width:100%;min-height:200px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;color:var(--text);font-family:var(--mono);font-size:.9rem;outline:none;resize:vertical}
.text-input-area textarea:focus{border-color:var(--accent-1)}

.output-area{display:none;margin-top:20px}
.output-area.show{display:block}
.output-area textarea{width:100%;min-height:200px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;color:var(--text);font-family:var(--mono);font-size:.9rem;outline:none;resize:vertical}
.output-area .output-actions{display:flex;gap:10px;margin-top:12px}

@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--card);border-bottom:1px solid var(--border);flex-direction:column;padding:16px 20px;gap:12px}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .hero{padding:40px 0 24px}
  .hero h1{font-size:1.6rem}
  .hero p{font-size:.95rem}
  .tool-card{padding:20px}
  .options-row{flex-direction:column}
  .option-group{min-width:100%}
  .steps{grid-template-columns:1fr}
  .features{grid-template-columns:1fr 1fr}
  .footer-inner{flex-direction:column;text-align:center}
}

@media(max-width:480px){
  .hero h1{font-size:1.35rem}
  .tool-card{padding:16px}
  .btn{padding:12px 16px;font-size:.9rem}
  .features{grid-template-columns:1fr}
  .upload-area{padding:32px 16px}
}