:root{--ink:#152118;--muted:#5e6b60;--panel:#ffffff;--line:#d7dfd6;--accent:#354a34;--accent-dark:#283a29;--deep:#2f4430;--deep-soft:#466348;--bg-1:#edf3ed;--bg-2:#f8fbf8;--ring:0 20px 60px rgba(21,33,24,.14)}
*{box-sizing:border-box}
body{margin:0;font-family:"Manrope","Segoe UI",Tahoma,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at 10% 8%,rgba(53,74,52,.2),transparent 36%),radial-gradient(circle at 84% 0%,rgba(40,58,41,.21),transparent 34%),radial-gradient(circle at 80% 80%,rgba(70,99,72,.14),transparent 26%),linear-gradient(150deg,var(--bg-1),var(--bg-2));min-height:100vh}
[data-lang="ar"] body,[data-lang="ar"]{font-family:"Cairo","Tahoma",Arial,sans-serif}
.shell{width:min(1280px,calc(100% - 34px));margin:auto;padding-bottom:34px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px 0 12px}
.brand{display:flex;align-items:flex-start;gap:12px}
.brand-mark{height:56px;border-radius:14px;background:#fff;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 12px 28px rgba(21,33,24,.16);border:1px solid rgba(53,74,52,.2);padding:8px 14px;width:auto}
.brand-logo{height:36px;width:auto;display:block;max-width:min(38vw,240px)}
.brand-copy{display:grid;gap:2px}
.brand-en{font-weight:800;color:var(--muted);line-height:1.2}
.brand-ar{font-weight:700;color:var(--deep);line-height:1.2;text-align:left;justify-self:start;order:-1}
.lang-switch{display:inline-flex;background:#f2f4f7;border:1px solid var(--line);border-radius:999px;padding:4px}
.lang-switch button{border:0;background:transparent;color:var(--muted);padding:7px 12px;border-radius:999px;font-weight:800;cursor:pointer;font-size:12px}
.lang-switch button.active{background:var(--deep);color:#fff}
.hero{background:linear-gradient(135deg,var(--deep),var(--deep-soft));color:#fff;border-radius:30px;padding:34px;box-shadow:var(--ring);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;left:-120px;top:-100px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(106,144,104,.38),rgba(106,144,104,0));pointer-events:none}
.hero::after{content:"";position:absolute;right:-140px;bottom:-120px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.14),rgba(255,255,255,0));pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:22px;align-items:end}
.hero-title{margin:0;font-size:clamp(34px,5.1vw,56px);line-height:.96;letter-spacing:-.04em}
.hero-sub{margin:14px 0 0;max-width:780px;line-height:1.8;color:rgba(255,255,255,.84)}
.workspace{display:grid;grid-template-columns:minmax(320px,380px) minmax(0,1fr);gap:18px;margin-top:18px;align-items:start}
.panel{background:linear-gradient(170deg,rgba(255,255,255,.96),rgba(255,255,255,.86));border:1px solid rgba(17,49,75,.1);border-radius:24px;box-shadow:var(--ring)}
.panel-head{padding:16px 18px;border-bottom:1px solid rgba(17,49,75,.1);display:flex;justify-content:space-between;align-items:center;gap:12px}
.panel-head h2{margin:0;color:var(--deep);font-size:17px}
.meta-count{font-size:12px;color:var(--muted);font-weight:800}
.category-filter{padding:12px 12px 0;display:flex;flex-wrap:wrap;gap:8px}
.cat-btn{border:1px solid rgba(17,49,75,.14);background:#fff;color:var(--deep);border-radius:999px;padding:7px 10px;font-weight:800;font-size:12px;cursor:pointer;transition:.2s ease}
.cat-btn:hover{border-color:rgba(53,74,52,.42)}
.cat-btn.active{background:linear-gradient(120deg,var(--accent),var(--accent-dark));color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(53,74,52,.3)}
.file-list{padding:12px;display:grid;gap:10px}
.file-card{border:1px solid rgba(17,49,75,.12);border-radius:16px;padding:13px;background:#fff;cursor:pointer;display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;transition:.2s ease}
.file-card:hover,.file-card.active{transform:translateY(-1px);border-color:rgba(53,74,52,.4);box-shadow:0 10px 24px rgba(21,33,24,.1)}
.file-card input{margin-top:5px;accent-color:var(--accent)}
.file-title{font-weight:800;color:var(--deep);line-height:1.25}
.file-title-ar{display:none;font-weight:800;color:var(--deep);line-height:1.35;direction:rtl;text-align:right}
[data-lang="ar"] .file-title-en{display:none}
[data-lang="ar"] .file-title-ar{display:block}
.file-desc{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.65}
.file-desc-ar{display:none;direction:rtl;text-align:right}
[data-lang="ar"] .file-desc-en{display:none}
[data-lang="ar"] .file-desc-ar{display:block}
.file-cat{display:inline-flex;margin-top:7px;color:#2f4430;background:#edf4ed;border:1px solid rgba(53,74,52,.18);border-radius:999px;padding:3px 7px;font-size:11px;font-weight:800}
.missing{display:block;color:#b42318;font-size:12px;font-weight:700;margin-top:6px}
.is-hidden{display:none}
.download-form{padding:14px;border-top:1px solid rgba(17,49,75,.1);display:grid;gap:12px}
.download-form label{display:block;font-weight:800;color:var(--deep);font-size:13px;margin-bottom:6px}
.download-options{display:grid;gap:8px}
.option-row{display:flex;gap:10px;align-items:flex-start;background:#f5f8f5;border:1px solid rgba(53,74,52,.14);padding:10px 12px;border-radius:12px}
.option-row input{accent-color:var(--accent);margin-top:3px}
.option-row strong{display:block;color:var(--deep);font-size:13px;line-height:1.35}
.option-row span{display:block;color:var(--muted);font-size:12px;line-height:1.55}
.selection-panel{border:1px dashed rgba(53,74,52,.28);border-radius:12px;padding:10px 12px;background:#fbfdfb}
.selection-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:8px}
.selection-count{font-size:12px;color:var(--deep);font-weight:800}
.selection-actions{display:flex;gap:6px;flex-wrap:wrap}
.mini-btn{border:1px solid rgba(53,74,52,.24);background:#fff;color:var(--deep);padding:5px 9px;border-radius:999px;font-weight:800;font-size:11px;cursor:pointer}
.selected-files{display:grid;gap:4px;max-height:140px;overflow:auto;padding-right:4px}
.selected-item{font-size:12px;color:var(--muted);line-height:1.45}
.selected-empty{font-size:12px;color:#b42318;font-weight:700}
.captcha{display:flex;justify-content:center;min-height:78px;overflow:hidden}
.btn{width:100%;border:0;border-radius:14px;padding:13px 16px;color:#fff;background:linear-gradient(120deg,var(--accent),var(--accent-dark));font-weight:800;font-size:15px;cursor:pointer;box-shadow:0 12px 28px rgba(53,74,52,.32)}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}
.preview-wrap{padding:16px}
.viewer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.viewer-title{color:var(--deep);font-weight:800;font-size:18px}
.viewer-title-ar{display:none;direction:rtl;text-align:right}
[data-lang="ar"] .viewer-title-en{display:none}
[data-lang="ar"] .viewer-title-ar{display:block}
.viewer-actions{display:flex;gap:8px;flex-wrap:wrap}
.small-btn{border:1px solid rgba(17,49,75,.15);background:#fff;color:var(--deep);border-radius:999px;padding:8px 11px;font-weight:800;font-size:12px;cursor:pointer}
.small-btn:hover{border-color:rgba(53,74,52,.4)}
.preview-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.preview-item{border:1px solid rgba(17,49,75,.14);border-radius:14px;padding:10px;background:#fff}
.preview-item.hidden{display:none}
.preview-item-title{font-size:13px;font-weight:800;color:var(--deep);margin:0 0 8px;line-height:1.35}
.preview-item-title-ar{display:none;direction:rtl;text-align:right}
[data-lang="ar"] .preview-item-title-en{display:none}
[data-lang="ar"] .preview-item-title-ar{display:block}
.preview-frame{width:100%;height:clamp(360px,44vh,520px);border:0;border-radius:12px;background:#e8edf1;box-shadow:inset 0 0 0 1px rgba(17,49,75,.12)}
.message{margin:0;color:#2f4430;background:#edf4ed;border:1px solid rgba(53,74,52,.24);border-radius:14px;padding:12px 14px;line-height:1.7}
.footer{padding-top:18px;color:var(--muted);font-size:13px;text-align:center;display:grid;gap:7px}
.footer a{color:var(--deep);font-weight:800;text-decoration:none}
.footer a:hover{text-decoration:underline}
.app-footer{border-top:1px solid rgba(53,74,52,.12);margin-top:18px;padding-top:18px}
.footer-links{display:flex;gap:8px;justify-content:center;align-items:center;flex-wrap:wrap}
.i18n[data-lang-item="ar"]{display:none}
[data-lang="ar"] .i18n[data-lang-item="en"]{display:none}
[data-lang="ar"] .i18n[data-lang-item="ar"]{display:inline}
[data-lang="ar"] .hero,[data-lang="ar"] .panel,[data-lang="ar"] .message{direction:rtl}
@media(max-width:1200px){.workspace{grid-template-columns:minmax(300px,350px) minmax(0,1fr)}.preview-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}}
@media(max-width:1040px){.hero-grid,.workspace{grid-template-columns:1fr}.preview-wrap{order:1}.panel{order:2}.preview-frame{height:clamp(320px,42vh,460px)}.selection-head{flex-direction:column;align-items:flex-start}}
@media(max-width:640px){.shell{width:min(100% - 18px,1280px)}.hero{padding:24px;border-radius:24px}.topbar{padding-top:16px}.preview-frame{height:clamp(260px,36vh,340px)}.panel-head,.viewer-toolbar{align-items:flex-start;flex-direction:column}.brand-mark{padding:7px 10px}.brand-logo{height:30px;max-width:52vw}.option-row{padding:10px}}