/* SmartExcel — Central Stylesheet · Eng. Amer Ali · iCoreUX.com · 2026 */
:root[data-theme="light"]{--bg:#f8fafc;--card-bg:#fff;--text:#0f172a;--text-muted:#64748b;--accent:#059669;--accent-hover:#047857;--accent-light:#d1fae5;--primary:#3b82f6;--border:#e2e8f0;--table-header:#d1fae5;--table-row-alt:#f0fdf4;--shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);--shadow-lg:0 10px 25px rgba(0,0,0,.08);}
:root[data-theme="dark"]{--bg:#0f172a;--card-bg:#1e293b;--text:#f8fafc;--text-muted:#94a3b8;--accent:#10b981;--accent-hover:#059669;--accent-light:#064e3b;--primary:#60a5fa;--border:#334155;--table-header:#064e3b;--table-row-alt:#022c22;--shadow:0 1px 3px rgba(0,0,0,.4);--shadow-lg:0 10px 25px rgba(0,0,0,.5);}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;transition:background .2s,color .2s;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
header.site-header{background:var(--card-bg);border-bottom:1px solid var(--border);padding:14px 0;position:sticky;top:0;z-index:100;box-shadow:var(--shadow);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:20px;}
.logo img{width:36px;height:36px;}
.logo span{color:var(--accent);}
.header-actions{display:flex;gap:10px;align-items:center;}
.theme-btn{background:var(--bg);border:1px solid var(--border);color:var(--text);width:40px;height:40px;border-radius:10px;cursor:pointer;font-size:18px;transition:all .2s;}
.theme-btn:hover{background:var(--accent-light);}
.hero{text-align:center;padding:60px 20px 40px;}
.hero h1{font-size:clamp(28px,5vw,42px);font-weight:800;margin-bottom:12px;}
.hero h1 span{color:var(--accent);}
.hero p{color:var(--text-muted);font-size:17px;max-width:620px;margin:0 auto 20px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px;}
.badge{background:var(--accent-light);color:var(--accent);padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;padding:20px 0 60px;}
.tool-card{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:22px;text-decoration:none;color:var(--text);transition:all .2s;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px;}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--accent);}
.tool-card .icon{font-size:32px;}
.tool-card h3{font-size:16px;font-weight:700;}
.tool-card p{font-size:13px;color:var(--text-muted);flex:1;}
.tool-card .searches{font-size:11px;color:var(--accent);font-weight:700;background:var(--accent-light);padding:3px 8px;border-radius:8px;align-self:flex-start;}
.wrap{max-width:900px;margin:0 auto;padding:30px 20px 60px;}
.page-title{font-size:clamp(24px,4vw,32px);font-weight:800;margin-bottom:8px;}
.page-title .accent{color:var(--accent);}
.page-subtitle{color:var(--text-muted);font-size:15px;margin-bottom:24px;}
.tool-panel{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:26px;box-shadow:var(--shadow);margin-bottom:24px;}
.drop-zone{border:2px dashed var(--border);border-radius:12px;padding:40px 20px;text-align:center;cursor:pointer;transition:all .2s;background:var(--bg);}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--accent);background:var(--accent-light);}
.drop-zone .dz-icon{font-size:48px;margin-bottom:10px;}
.drop-zone h3{font-size:17px;margin-bottom:6px;}
.drop-zone p{color:var(--text-muted);font-size:13px;}
.drop-zone input[type="file"]{display:none;}
.file-info{margin-top:14px;padding:12px 16px;background:var(--accent-light);border-radius:10px;font-size:13px;font-weight:600;color:var(--accent);display:none;}
.file-info.show{display:block;}
.preview-section{margin-top:24px;display:none;}
.preview-section.show{display:block;}
.preview-section h3{font-size:15px;margin-bottom:10px;color:var(--text-muted);font-weight:700;text-transform:uppercase;letter-spacing:.5px;}
.table-wrapper{overflow:auto;max-height:340px;border:1px solid var(--border);border-radius:10px;}
table.preview-table{width:100%;border-collapse:collapse;font-size:13px;}
table.preview-table th{background:var(--table-header);color:var(--text);padding:10px 14px;text-align:left;font-weight:700;position:sticky;top:0;z-index:2;border-bottom:2px solid var(--accent);white-space:nowrap;}
table.preview-table td{padding:9px 14px;border-bottom:1px solid var(--border);white-space:nowrap;}
table.preview-table tr:nth-child(even) td{background:var(--table-row-alt);}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-size:15px;font-weight:700;border:none;cursor:pointer;transition:all .2s;text-decoration:none;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;}
.btn-secondary{background:var(--bg);color:var(--text);border:1px solid var(--border);}
.btn-secondary:hover{background:var(--accent-light);}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px;}
.options-row{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;margin-top:18px;}
.option-group{display:flex;flex-direction:column;gap:6px;}
.option-group label{font-size:12.5px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.3px;}
.option-group select,.option-group input[type="text"]{padding:10px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:14px;min-width:180px;}
footer.site-footer{background:var(--card-bg);border-top:1px solid var(--border);padding:40px 0 24px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px;margin-bottom:30px;}
.footer-col h4{font-size:14px;margin-bottom:12px;color:var(--accent);font-weight:800;}
.footer-col a{display:block;color:var(--text-muted);text-decoration:none;font-size:13.5px;padding:3px 0;transition:color .2s;}
.footer-col a:hover{color:var(--accent);}
.ecosystem-list{display:flex;flex-direction:column;gap:6px;}
.ecosystem-list a{display:flex;align-items:center;gap:8px;padding:4px 0;}
.ecosystem-list .emoji{font-size:15px;}
.ecosystem-list .name{font-weight:700;color:var(--text);font-size:13px;}
.ecosystem-list .desc{font-size:11.5px;color:var(--text-muted);display:block;}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;font-size:12.5px;color:var(--text-muted);}
#offline-wall{display:none;position:fixed;inset:0;background:var(--bg);z-index:99999;align-items:center;justify-content:center;flex-direction:column;padding:20px;text-align:center;}
#offline-wall.show{display:flex;}
#offline-wall .ow-icon{font-size:64px;margin-bottom:16px;}
#offline-wall h2{font-size:24px;margin-bottom:8px;}
#offline-wall p{color:var(--text-muted);max-width:400px;}
@media (max-width:728px){.hero{padding:40px 16px 30px;}.tools-grid{grid-template-columns:1fr;gap:14px;}.tool-panel{padding:18px;}.drop-zone{padding:28px 16px;}.actions{flex-direction:column;}.btn{width:100%;justify-content:center;}}
.hidden{display:none!important;}
.text-center{text-align:center;}
.mt-20{margin-top:20px;}