/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --bg:#0f0f1a;--bg2:#1a1a2e;--bg3:#252540;
    --text:#e0e0e0;--text2:#a0a0b0;--text3:#707080;
    --primary:#e74c3c;--primary-hover:#c0392b;
    --success:#27ae60;--success-hover:#219a52;
    --accent:#3498db;--accent2:#9b59b6;
    --border:#2a2a45;--card:#1e1e35;
    --radius:12px;--radius-sm:8px;
    --shadow:0 4px 24px rgba(0,0,0,.3);
    --transition:.2s ease;
    --max-w:1200px;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}

/* ===== LAYOUT ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}
.main{flex:1;padding:2rem 0 4rem}

/* ===== HEADER ===== */
.header{background:var(--bg2);border-bottom:1px solid var(--border);padding:.75rem 0;position:sticky;top:0;z-index:100;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:.75rem;font-size:1.25rem;font-weight:700;color:var(--text);text-decoration:none}
.logo svg{flex-shrink:0}
.nav{display:flex;gap:1rem}
.nav-link{color:var(--text2);font-size:.9rem;padding:.5rem .75rem;border-radius:var(--radius-sm);transition:all var(--transition)}
.nav-link:hover{color:var(--text);background:var(--bg3)}

/* ===== HERO ===== */
.hero{text-align:center;padding:3rem 0 2.5rem}
.hero h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.75rem}
.hero p{color:var(--text2);font-size:1.15rem;max-width:600px;margin:0 auto}

/* ===== TOOLS GRID ===== */
.tools-category{margin-bottom:2.5rem}
.category-title{font-size:1.1rem;font-weight:600;color:var(--text2);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}
.tools-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-decoration:none;transition:all var(--transition);display:flex;flex-direction:column;align-items:center;text-align:center;gap:.5rem}
.tool-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 32px rgba(231,76,60,.15)}
.tool-card-icon{width:48px;height:48px;color:var(--primary);margin-bottom:.25rem}
.tool-card-icon svg{width:100%;height:100%}
.tool-card-name{font-size:.95rem;font-weight:600;color:var(--text)}
.tool-card-desc{font-size:.8rem;color:var(--text3);line-height:1.4}

/* ===== FEATURES ===== */
.features{text-align:center;padding:3rem 0}
.features h2{font-size:1.5rem;margin-bottom:2rem}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}
.feature{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem 1.5rem}
.feature-icon{font-size:2rem;margin-bottom:.75rem}
.feature h3{font-size:1rem;margin-bottom:.5rem}
.feature p{color:var(--text2);font-size:.9rem}

/* ===== TOOL PAGE ===== */
.tool-page{max-width:800px;margin:0 auto}
.back-link{display:inline-flex;align-items:center;gap:.5rem;color:var(--text2);font-size:.9rem;margin-bottom:1.5rem;padding:.5rem 0}
.back-link:hover{color:var(--text)}
.tool-title{font-size:2rem;font-weight:700;margin-bottom:.5rem}
.tool-desc{color:var(--text2);font-size:1.05rem;margin-bottom:2rem}

/* ===== UPLOAD ZONE ===== */
.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:3rem 2rem;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--card)}
.upload-zone:hover,.upload-zone.drag-over{border-color:var(--primary);background:rgba(231,76,60,.05)}
.upload-zone.drag-over{transform:scale(1.01)}
.upload-icon{color:var(--text3);margin-bottom:1rem}
.upload-text{font-size:1.05rem;margin-bottom:.5rem}
.upload-btn{color:var(--primary);cursor:pointer;font-weight:600;text-decoration:underline}
.upload-hint{color:var(--text3);font-size:.85rem}

/* ===== URL INPUT ===== */
.url-input-section{margin-bottom:1.5rem}
.url-input-group{display:flex;gap:.75rem;margin-bottom:1rem}
.url-field{flex:1;padding:.75rem 1rem;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:1rem}
.url-field:focus{outline:none;border-color:var(--primary)}
.url-options{display:flex;gap:1.5rem;flex-wrap:wrap}
.url-options label{color:var(--text2);font-size:.9rem;display:flex;align-items:center;gap:.5rem}
.url-options select{padding:.4rem .75rem;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text)}

/* ===== FILE LIST ===== */
.file-list{margin:1.5rem 0}
.file-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:.5rem}
.file-item-icon{width:32px;height:32px;color:var(--primary);flex-shrink:0}
.file-item-info{flex:1;min-width:0}
.file-item-name{font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-item-size{font-size:.8rem;color:var(--text3)}
.file-item-remove{background:none;border:none;color:var(--text3);cursor:pointer;padding:.25rem;border-radius:4px;transition:all var(--transition)}
.file-item-remove:hover{color:var(--primary);background:rgba(231,76,60,.1)}

/* ===== TOOL OPTIONS ===== */
.tool-options{margin:1.5rem 0;padding:1.25rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.option-group{margin-bottom:1rem}
.option-group:last-child{margin-bottom:0}
.option-label{display:block;font-size:.9rem;font-weight:500;margin-bottom:.4rem;color:var(--text2)}
.option-input,.option-select{width:100%;padding:.6rem .75rem;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.9rem}
.option-input:focus,.option-select:focus{outline:none;border-color:var(--primary)}
.option-hint{font-size:.8rem;color:var(--text3);margin-top:.25rem}
.option-checkbox{display:flex;align-items:center;gap:.5rem;cursor:pointer}
.option-checkbox input[type="checkbox"]{width:18px;height:18px;accent-color:var(--primary)}
.option-range{width:100%;accent-color:var(--primary)}

/* ===== THUMBNAILS ===== */
.thumbs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:.75rem;margin:1.5rem 0;padding:1rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.thumb-item{position:relative;border:2px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;cursor:pointer;transition:all var(--transition)}
.thumb-item:hover{border-color:var(--accent)}
.thumb-item.selected{border-color:var(--primary)}
.thumb-item img{width:100%;height:auto;display:block}
.thumb-label{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.7);color:#fff;font-size:.75rem;text-align:center;padding:.25rem}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.65rem 1.5rem;border:none;border-radius:var(--radius-sm);font-weight:600;font-size:.95rem;cursor:pointer;transition:all var(--transition);text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);color:#fff}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:var(--success-hover);color:#fff}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text2)}
.btn-outline:hover{border-color:var(--text2);color:var(--text)}
.btn-lg{padding:.85rem 2.5rem;font-size:1.05rem}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== ACTION BAR ===== */
.action-bar{text-align:center;margin:2rem 0}

/* ===== PROGRESS ===== */
.progress-section{margin:2rem 0;text-align:center}
.progress-bar{width:100%;height:8px;background:var(--bg3);border-radius:4px;overflow:hidden;margin-bottom:1rem}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:4px;transition:width .3s ease;width:0}
.progress-text{color:var(--text2);font-size:.9rem}

/* ===== RESULT ===== */
.result-section{margin:2rem 0}
.result-card{text-align:center;padding:2.5rem;background:var(--card);border:1px solid var(--success);border-radius:var(--radius)}
.result-icon{margin-bottom:1rem}
.result-message{font-size:1.15rem;font-weight:600;margin-bottom:.5rem}
.result-info{color:var(--text2);font-size:.9rem;margin-bottom:1.5rem}

/* ===== ERROR ===== */
.error-section{margin:2rem 0}
.error-card{text-align:center;padding:2rem;background:var(--card);border:1px solid var(--primary);border-radius:var(--radius)}
.error-message{color:var(--primary);font-size:1rem;margin-bottom:1rem}

/* ===== FOOTER ===== */
.footer{background:var(--bg2);border-top:1px solid var(--border);padding:1.5rem 0;text-align:center;font-size:.85rem;color:var(--text3)}
.footer a{color:var(--text2)}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
    .hero h1{font-size:1.75rem}
    .hero p{font-size:1rem}
    .tools-row{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem}
    .tool-card{padding:1rem}
    .tool-card-icon{width:36px;height:36px}
    .tool-title{font-size:1.5rem}
    .upload-zone{padding:2rem 1rem}
    .url-input-group{flex-direction:column}
    .features-grid{grid-template-columns:1fr}
    .thumbs-grid{grid-template-columns:repeat(auto-fill,minmax(80px,1fr))}
}
@media(max-width:480px){
    .tools-row{grid-template-columns:repeat(2,1fr)}
    .tool-card-desc{display:none}
    .container{padding:0 1rem}
}