/* ═══════════════════════════════════════════════════════════════════
   research-hub — الأنماط
   لا خطوط خارجية: نعتمد خطوط النظام العربية.
   السبب: CSP يمنع النطاقات الخارجية، والاستضافة الذاتية يجب أن تعمل
   بلا إنترنت. لاستعمال IBM Plex Sans Arabic نزّله إلى public/fonts/
   وأضف @font-face هنا (font-src 'self' مسموح أصلاً).
   ═══════════════════════════════════════════════════════════════════ */

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

:root{
  --bg:#0f1117;--surface:#181c27;--surface2:#1e2333;--border:#2a3045;
  --accent:#4f8ef7;--accent2:#7c5cfc;--text:#e8eaf0;--text2:#8b91a8;--text3:#555c76;
  --green:#2dd4a0;--amber:#f5a623;--red:#f25757;--radius:10px;--radius-lg:16px;
  --font:"Segoe UI","Noto Sans Arabic","Dubai","Tahoma","Arial",system-ui,sans-serif;
}

html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}

::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}
::selection{background:rgba(79,142,247,.3)}

select{color-scheme:dark}
select option{background-color:#1e2333;color:#e8eaf0;font-weight:400;padding:8px}
select option:checked{background-color:#2b3450;color:#fff}

/* ── الحركات ─────────────────────────────────────────────────────── */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-16px)}to{opacity:1;transform:translateY(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:translateX(0)}}
@keyframes glow{0%,100%{box-shadow:0 0 12px rgba(79,142,247,.15)}50%{box-shadow:0 0 24px rgba(79,142,247,.35)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
@keyframes slideUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ═══ صفحة الدخول ═══════════════════════════════════════════════ */
.auth-screen{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;padding:1rem}
.auth-screen::before{content:"";position:absolute;inset:0;background:
  radial-gradient(700px circle at 20% 15%,rgba(79,142,247,.10),transparent 55%),
  radial-gradient(700px circle at 85% 85%,rgba(124,92,252,.10),transparent 55%);pointer-events:none}
.auth-card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2.5rem 2rem;width:100%;max-width:420px;box-shadow:0 24px 60px rgba(0,0,0,.45);animation:scaleIn .45s cubic-bezier(.34,1.4,.64,1)}
.auth-logo{width:56px;height:56px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 1.25rem;animation:glow 3s ease-in-out infinite}
.auth-title{font-size:20px;font-weight:600;text-align:center;margin-bottom:6px}
.auth-sub{font-size:13px;color:var(--text2);text-align:center;margin-bottom:1.75rem}
.auth-field{margin-bottom:14px}
.auth-field label{display:block;font-size:12px;color:var(--text2);font-weight:600;margin-bottom:6px}
.auth-input{width:100%;background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:12px 14px;border-radius:var(--radius);font-size:15px;font-family:inherit;transition:all .2s}
.auth-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,142,247,.12)}
.auth-input:disabled{opacity:.55;cursor:not-allowed}
.auth-err{color:var(--red);font-size:12.5px;min-height:20px;margin:4px 0 8px;line-height:1.5}
.auth-ok{color:var(--green);font-size:12.5px;min-height:20px;margin:4px 0 8px;line-height:1.5}
.auth-btn{width:100%;justify-content:center;padding:13px;font-size:15px;margin-top:6px}
.auth-hint{font-size:11px;color:var(--text3);text-align:center;margin-top:1.25rem;line-height:1.8}
.pw-wrap{position:relative}
.pw-toggle{position:absolute;left:10px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--text3);cursor:pointer;font-size:15px;padding:4px}
.pw-toggle:hover{color:var(--text)}
.pw-meter{height:4px;background:var(--surface2);border-radius:4px;margin-top:8px;overflow:hidden}
.pw-meter i{display:block;height:100%;width:0;border-radius:4px;transition:width .3s,background .3s}

/* ═══ الهيكل ═════════════════════════════════════════════════════ */
.layout{display:flex;min-height:100vh}
.layout.hidden,.hidden{display:none!important}
.sidebar{width:230px;background:var(--surface);border-left:1px solid var(--border);padding:1.5rem 1rem;display:flex;flex-direction:column;gap:.5rem;position:fixed;top:0;right:0;height:100vh;z-index:100;overflow-y:auto;animation:slideInRight .4s ease both}
.main{margin-right:230px;flex:1;padding:2rem;min-width:0}
.logo{font-size:15px;font-weight:600;padding:0 .5rem 1.25rem;border-bottom:1px solid var(--border);margin-bottom:.5rem;display:flex;align-items:center;gap:8px}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius);cursor:pointer;color:var(--text2);font-size:14px;border:none;background:none;width:100%;text-align:right;font-family:inherit;transition:all .25s cubic-bezier(.4,0,.2,1)}
.nav-item:hover{background:var(--surface2);color:var(--text);transform:translateX(-3px)}
.nav-item.active{background:linear-gradient(135deg,rgba(79,142,247,.15),rgba(124,92,252,.15));color:var(--accent)}
.side-foot{margin-top:auto;padding-top:1rem;border-top:1px solid var(--border)}
.who{display:flex;align-items:center;gap:10px;padding:8px;border-radius:var(--radius);background:var(--surface2);margin-bottom:8px}
.who-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;color:#fff;flex-shrink:0}
.who-name{font-size:13px;font-weight:600;line-height:1.3}
.who-role{font-size:10.5px;color:var(--text3)}

/* ═══ رأس الصفحة والإحصاءات ═════════════════════════════════════ */
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem;flex-wrap:wrap;gap:12px;animation:fadeInDown .5s ease both}
.page-title{font-size:22px;font-weight:600}
.page-sub{font-size:13px;color:var(--text2);margin-top:3px}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin-bottom:2rem;animation:fadeInUp .5s ease .1s both}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;transition:all .3s cubic-bezier(.4,0,.2,1)}
.stat-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 8px 24px rgba(79,142,247,.12)}
.stat-label{font-size:12px;color:var(--text2);margin-bottom:8px}
.stat-val{font-size:28px;font-weight:600}
.stat-card.blue .stat-val{color:var(--accent)}
.stat-card.purple .stat-val{color:var(--accent2)}
.stat-card.green .stat-val{color:var(--green)}
.stat-card.red .stat-val{color:var(--red)}
.stat-card.amber .stat-val{color:var(--amber)}

/* ═══ أزرار ═════════════════════════════════════════════════════ */
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:var(--radius);font-size:13px;font-family:inherit;cursor:pointer;border:none;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1)}
.btn:active{transform:scale(.96)}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff}
.btn-primary:hover:not(:disabled){box-shadow:0 4px 16px rgba(79,142,247,.35);transform:translateY(-1px)}
.btn-ghost{background:var(--surface2);color:var(--text2);border:1px solid var(--border)}
.btn-ghost:hover:not(:disabled){color:var(--text)}
.btn-danger{background:rgba(242,87,87,.12);color:var(--red);border:1px solid rgba(242,87,87,.3)}
.btn-danger:hover:not(:disabled){background:rgba(242,87,87,.2)}
.btn-sm{padding:5px 11px;font-size:11.5px}
.icon-btn{background:none;border:none;cursor:pointer;padding:5px;color:var(--text3);border-radius:6px;font-size:15px;transition:all .15s}
.icon-btn:hover{background:var(--surface2);color:var(--text);transform:scale(1.15)}
.icon-btn:active{transform:scale(.9)}
.icon-btn.del:hover{color:var(--red)}

/* ═══ شريط الأدوات والجدول ══════════════════════════════════════ */
.toolbar{display:flex;gap:10px;margin-bottom:1.5rem;flex-wrap:wrap;animation:fadeInUp .5s ease .2s both}
.search-wrap{flex:1;min-width:200px;position:relative}
.search-wrap input{width:100%;background:var(--surface);border:1px solid var(--border);color:var(--text);padding:9px 12px 9px 36px;border-radius:var(--radius);font-size:13px;font-family:inherit;transition:all .25s}
.search-wrap input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,142,247,.12)}
.search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text3);pointer-events:none}
.filter-sel{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:9px 10px;border-radius:var(--radius);font-size:13px;font-family:inherit;cursor:pointer}
.table-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;animation:fadeInUp .5s ease .3s both}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{padding:12px 16px;text-align:right;color:var(--text3);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.02);white-space:nowrap}
td{padding:12px 16px;border-bottom:1px solid rgba(42,48,69,.5);vertical-align:middle}
tr:last-child td{border-bottom:none}
tbody tr{transition:all .2s ease;animation:fadeIn .4s ease both}
tbody tr:hover td{background:rgba(79,142,247,.04)}
.student-name{font-weight:600}
.student-college{font-size:11px;color:var(--text2);margin-top:2px}
.topic-cell{max-width:230px}
.topic-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}
.action-row{display:flex;gap:2px}

/* ═══ الشارات ═══════════════════════════════════════════════════ */
.badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:20px;font-size:11px;font-weight:600}
.badge-new{background:rgba(79,142,247,.15);color:#7ab3ff}
.badge-inprog{background:rgba(245,166,35,.12);color:#f5c842}
.badge-review{background:rgba(124,92,252,.15);color:#a78bfa}
.badge-done{background:rgba(45,212,160,.12);color:#2dd4a0}
.badge-delivered{background:rgba(139,145,168,.12);color:#8b91a8}
.badge-revision{background:rgba(251,146,60,.16);color:#fb923c}
.badge-cancelled{background:rgba(242,87,87,.1);color:#ef8a8a;text-decoration:line-through}
.badge-paid{background:rgba(45,212,160,.12);color:#2dd4a0}
.badge-partial{background:rgba(245,166,35,.12);color:#f5c842}
.badge-unpaid{background:rgba(242,87,87,.12);color:#f25757}
.status-sel{border:none;font-size:11px;font-family:inherit;cursor:pointer;color:inherit;padding:3px 6px;border-radius:20px}
.status-sel option{font-size:13px}
.late-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--red);margin-left:4px;animation:pulse 1.5s infinite}

/* الورقة الصفراء — تنبيه تعديل مطلوب */
.rev-flag{display:inline-flex;align-items:center;gap:3px;background:rgba(245,166,35,.18);border:1px solid rgba(245,166,35,.4);color:#f5c842;font-size:10px;font-weight:600;padding:1px 6px;border-radius:8px;cursor:pointer;font-family:inherit;margin-left:4px;vertical-align:middle;animation:pulse 2.2s infinite}
.rev-flag:hover{background:rgba(245,166,35,.34);animation:none}
.rev-item{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;margin-bottom:8px}
.rev-item.open{border-color:rgba(245,166,35,.45);background:rgba(245,166,35,.06)}
.rev-item.done{opacity:.55}
.rev-item.done .rev-text{text-decoration:line-through}
.rev-text{font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.rev-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;font-size:11px;color:var(--text3);flex-wrap:wrap}
.rev-target{display:inline-flex;align-items:center;gap:4px;background:rgba(42,171,238,.12);color:#2aabee;padding:2px 8px;border-radius:20px;font-size:10.5px;font-weight:600}

.conn-badge{display:inline-flex;align-items:center;gap:5px;font-size:11px;padding:4px 9px;border-radius:20px;margin:8px 4px}
.conn-ok{background:rgba(45,212,160,.12);color:var(--green)}
.conn-err{background:rgba(242,87,87,.12);color:var(--red);cursor:pointer}
.conn-warn{background:rgba(245,166,35,.12);color:var(--amber)}

/* ═══ النوافذ ═══════════════════════════════════════════════════ */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:200;display:flex;align-items:center;justify-content:center;padding:1rem;backdrop-filter:blur(4px);animation:fadeIn .25s ease}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:660px;max-height:92vh;overflow-y:auto;padding:1.75rem;animation:scaleIn .3s cubic-bezier(.34,1.4,.64,1)}
.modal-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:1.5rem}
.modal-title{font-size:17px;font-weight:600}
.modal-sub{font-size:12px;color:var(--text2);margin-top:4px;line-height:1.6}
.close-btn{background:none;border:none;color:var(--text2);cursor:pointer;font-size:20px;padding:4px 8px;border-radius:6px;line-height:1}
.close-btn:hover{color:var(--text);background:var(--surface2)}
.modal-footer{display:flex;gap:8px;justify-content:flex-end;margin-top:1.5rem;padding-top:1.25rem;border-top:1px solid var(--border);flex-wrap:wrap}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-group{display:flex;flex-direction:column;gap:6px;min-width:0}
.form-group.full{grid-column:1/-1}
.form-label{font-size:12px;color:var(--text2);font-weight:600}
.form-input{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:var(--radius);font-size:14px;font-family:inherit;width:100%;transition:all .25s}
.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,142,247,.12)}
textarea.form-input{resize:vertical;min-height:82px;line-height:1.7}
.form-hint{font-size:11px;color:var(--text3);line-height:1.6}

/* ═══ رفع الملفات ═══════════════════════════════════════════════ */
.upload-zone{background:var(--surface2);border:1.5px dashed var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center;cursor:pointer;transition:all .2s}
.upload-zone:hover,.upload-zone.drag{border-color:var(--accent);background:rgba(79,142,247,.07)}
.upload-icon{font-size:30px;margin-bottom:8px}
.upload-text{font-size:13.5px;color:var(--text2)}
.upload-sub{font-size:11px;color:var(--text3);margin-top:4px;line-height:1.6}
.file-list{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.file-item{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:9px 12px}
.file-item.pending{border-style:dashed;opacity:.8}
.file-icon{font-size:16px;flex-shrink:0}
.file-meta{flex:1;min-width:0}
.file-name{font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-sub{font-size:10.5px;color:var(--text3);margin-top:2px}
.prog-bar{height:4px;background:var(--border);border-radius:4px;margin-top:10px;overflow:hidden}
.prog-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));width:0;transition:width .25s}

/* ═══ التفاصيل ══════════════════════════════════════════════════ */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:1rem}
.detail-item label{font-size:11px;color:var(--text3);margin-bottom:4px;display:block;text-transform:uppercase;letter-spacing:.5px}
.detail-item p{font-size:14px}
.detail-notes{background:var(--surface2);border-radius:var(--radius);padding:12px 14px;font-size:13px;color:var(--text2);margin-top:12px;line-height:1.8;white-space:pre-wrap}
.section-title{font-size:12px;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.5px;margin:1.25rem 0 .6rem}

.empty-state{text-align:center;padding:3.5rem 1rem;color:var(--text3)}
.empty-icon{font-size:46px;margin-bottom:12px;opacity:.4}
.loader{display:flex;align-items:center;justify-content:center;padding:3rem;color:var(--text3);gap:10px;font-size:14px}
.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}

/* ═══ التنبيهات المنبثقة ════════════════════════════════════════ */
.toast-wrap{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);z-index:999;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;max-width:92vw}
.toast{background:#1a2035;border:1px solid var(--border);color:var(--text);padding:11px 20px;border-radius:var(--radius);font-size:13px;box-shadow:0 4px 24px rgba(0,0,0,.5);animation:slideUp .3s ease;line-height:1.6;text-align:center}
.toast.success{border-color:rgba(45,212,160,.35);color:var(--green)}
.toast.error{border-color:rgba(242,87,87,.35);color:var(--red)}
.toast.warn{border-color:rgba(245,166,35,.35);color:var(--amber)}

/* ═══ المالية ═══════════════════════════════════════════════════ */
.fin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:1.25rem}
.fin-card{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:14px}
.fin-label{font-size:11px;color:var(--text2);margin-bottom:6px}
.fin-val{font-size:19px;font-weight:600}
.fin-sub{font-size:10px;color:var(--text3);margin-top:3px}
.fin-sec-title{font-size:13px;font-weight:600;margin:1.25rem 0 .6rem;display:flex;align-items:center;gap:6px}
.fin-table{width:100%;border-collapse:collapse;font-size:12px}
.fin-table th{padding:8px 10px;text-align:right;color:var(--text3);font-size:10px;text-transform:uppercase;letter-spacing:.4px;border-bottom:1px solid var(--border)}
.fin-table td{padding:9px 10px;border-bottom:1px solid rgba(42,48,69,.5)}
.fin-table tr:last-child td{border-bottom:none}
.bar-track{height:6px;background:var(--surface2);border-radius:6px;overflow:hidden;margin-top:5px}
.bar-fill{height:100%;border-radius:6px;transition:width .6s cubic-bezier(.4,0,.2,1)}

/* ═══ الفريق والتشخيص ═══════════════════════════════════════════ */
.team-row{display:flex;align-items:center;gap:12px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;margin-bottom:8px;flex-wrap:wrap}
.team-row.off{opacity:.5}
.team-info{flex:1;min-width:140px}
.team-name{font-size:14px;font-weight:600}
.team-user{font-size:11px;color:var(--text3);margin-top:2px;direction:ltr;text-align:right}
.tg-chip{display:inline-flex;align-items:center;gap:4px;font-size:10.5px;padding:2px 8px;border-radius:20px;font-weight:600}
.tg-on{background:rgba(42,171,238,.14);color:#2aabee}
.tg-off{background:rgba(139,145,168,.14);color:var(--text3)}
.note-box{background:rgba(79,142,247,.07);border:1px solid rgba(79,142,247,.25);border-radius:var(--radius);padding:12px 14px;font-size:12.5px;line-height:1.8;color:var(--text2)}
.note-box.warn{background:rgba(245,166,35,.07);border-color:rgba(245,166,35,.28)}
.note-box.danger{background:rgba(242,87,87,.07);border-color:rgba(242,87,87,.28)}
.code-line{direction:ltr;text-align:left;font-family:Consolas,"Courier New",monospace;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:13px;word-break:break-all;user-select:all;margin-top:8px}
.diag-row{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid rgba(42,48,69,.5);font-size:12.5px;flex-wrap:wrap}
.diag-row:last-child{border-bottom:none}
.diag-key{color:var(--text2)}
.diag-val{font-weight:600;direction:ltr;text-align:left}

/* ═══ الاستجابة ═════════════════════════════════════════════════ */
@media(max-width:900px){
  .sidebar{width:100%;height:auto;position:static;flex-direction:row;flex-wrap:wrap;padding:1rem;border-left:none;border-bottom:1px solid var(--border);animation:none}
  .main{margin-right:0;padding:1rem}
  .layout{flex-direction:column}
  .form-grid,.detail-grid{grid-template-columns:1fr}
  .form-group.full{grid-column:1}
  .side-foot{margin-top:0;padding-top:0;border-top:none;margin-right:auto;display:flex;gap:8px;align-items:center}
  .who{margin-bottom:0}
  .logo{padding-bottom:0;border-bottom:none;margin-bottom:0}
  .stat-card,tbody tr,.page-header,.stats-grid,.toolbar,.table-card{animation:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}