:root{
  --brand:#6d28d9;--brand-2:#8b5cf6;--brand-3:#a78bfa;
  --bg:#f5f3ff;--card:#ffffff;--text:#1e1b4b;--muted:#64748b;
  --success:#10b981;--warning:#f59e0b;--danger:#ef4444;
  --radius:16px;--radius-sm:10px;
  --shadow:0 6px 20px rgba(76,29,149,.08);
  --shadow-lg:0 12px 40px rgba(76,29,149,.15);
  --sidebar-w:260px;
}
*{font-family:"Vazirmatn","Shabnam","Sahel",system-ui,sans-serif;box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);min-height:100vh}
a{text-decoration:none;color:var(--brand)}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit}

/* ═══════ Login Screen (مستقل، بدون سایدبار) ═══════ */
.login-screen{position:fixed;inset:0;background:linear-gradient(135deg,#1e1b4b 0%,#6d28d9 55%,#a78bfa 100%);
  display:flex;align-items:center;justify-content:center;padding:1.5rem;z-index:100}
.login-card{background:#fff;border-radius:24px;padding:2.5rem 2rem;width:100%;max-width:400px;
  box-shadow:0 30px 60px rgba(0,0,0,.25);text-align:center;animation:loginIn .35s}
@keyframes loginIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
.login-brand{font-size:3.5rem;line-height:1;margin-bottom:.5rem}
.login-title{margin:0;font-size:1.3rem;font-weight:800;color:var(--text)}
.login-sub{margin:.3rem 0 1.8rem;color:var(--muted);font-size:.85rem}
.login-label{display:block;text-align:start;font-size:.85rem;color:var(--muted);margin:.9rem 0 .35rem;font-weight:600}
.login-card input{width:100%;padding:.85rem 1rem;border:1px solid #e2e8f0;border-radius:12px;font-size:.95rem;transition:all .15s}
.login-card input:focus{outline:none;border-color:var(--brand-3);box-shadow:0 0 0 4px rgba(139,92,246,.15)}
.login-btn{width:100%;padding:1rem;background:var(--brand);color:#fff;border:none;border-radius:12px;
  font-weight:700;font-size:1rem;margin-top:1.5rem;transition:all .15s}
.login-btn:hover{background:var(--brand-2);transform:translateY(-1px)}
.login-error{background:#fee2e2;color:#991b1b;padding:.75rem 1rem;border-radius:10px;font-size:.85rem;margin-bottom:.5rem;text-align:start}
.login-footer{margin-top:1.2rem;font-size:.82rem}
.login-footer a{color:var(--muted)}
.login-footer a:hover{color:var(--brand)}

/* ═══════ Dashboard Shell (پس از ورود) ═══════ */
.dashboard-shell{display:block;min-height:100vh}
.sidebar{position:fixed;top:0;inset-inline-start:0;width:var(--sidebar-w);height:100vh;
  background:linear-gradient(180deg,#1e1b4b,#312e81);color:#fff;z-index:1000;overflow-y:auto;transition:transform .25s}
.sidebar .brand{padding:1.5rem 1rem;text-align:center;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar .brand .logo{font-size:2rem;line-height:1}
.sidebar .brand .name{font-size:1rem;font-weight:800;margin-top:.5rem;color:#fff}
.sidebar .brand .sub{font-size:.72rem;color:#c7d2fe;margin-top:.2rem}
.sidebar nav{padding:.6rem 0}
.sidebar nav a{display:flex;align-items:center;gap:.7rem;color:#c7d2fe;padding:.7rem 1rem;
  margin:.15rem .6rem;border-radius:10px;font-size:.9rem;cursor:pointer;transition:all .15s}
.sidebar nav a i{font-size:1.15rem}
.sidebar nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar nav a.active{background:rgba(255,255,255,.14);color:#fff;box-shadow:inset 3px 0 0 var(--brand-3)}
.sidebar nav a.danger{color:#fca5a5;margin-top:.8rem}
.sidebar nav a.danger:hover{background:rgba(239,68,68,.15);color:#fecaca}

.main{min-height:100vh;margin-inline-start:var(--sidebar-w);padding:1.2rem 1.4rem}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:1.2rem}
.topbar .left{display:flex;align-items:center;gap:.7rem}
.topbar .right{display:flex;align-items:center;gap:.8rem}
.topbar h1{margin:0;font-size:1.2rem;font-weight:700}
.btn-icon{background:#fff;border:1px solid #e2e8f0;border-radius:10px;width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem}
.mobile-menu-btn{display:none}
@media(max-width:900px){
  .sidebar{transform:translateX(100%)}
  html[dir="rtl"] .sidebar{transform:translateX(100%)}
  html[dir="ltr"] .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)!important}
  .main{margin-inline-start:0;padding:1rem}
  .mobile-menu-btn{display:inline-flex}
}

/* Lang switch */
.lang-switch{display:flex;gap:.25rem;background:rgba(255,255,255,.85);border-radius:999px;
  padding:.25rem;box-shadow:var(--shadow)}
.lang-btn{border:none;background:transparent;padding:.35rem .75rem;border-radius:999px;
  font-size:.78rem;font-weight:700;color:var(--muted);transition:all .15s}
.lang-btn.active{background:var(--brand);color:#fff}
.user-badge{width:40px;height:40px;border-radius:50%;background:#ede9fe;color:var(--brand);
  display:grid;place-items:center;font-size:1.3rem;cursor:pointer}

/* Cards */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem}
.card-title{font-size:1rem;font-weight:700;margin:0 0 1rem}
.stat{background:var(--card);border-radius:var(--radius);padding:1.1rem 1.2rem;display:flex;
  align-items:center;gap:1rem;box-shadow:var(--shadow);transition:transform .2s}
.stat:hover{transform:translateY(-3px)}
.stat .ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;color:#fff;font-size:1.3rem}
.stat .label{font-size:.78rem;color:var(--muted);margin-bottom:.15rem}
.stat .value{font-size:1.5rem;font-weight:800;line-height:1}
.stat.b1 .ico{background:linear-gradient(135deg,#8b5cf6,#6366f1)}
.stat.b2 .ico{background:linear-gradient(135deg,#10b981,#059669)}
.stat.b3 .ico{background:linear-gradient(135deg,#f59e0b,#d97706)}
.stat.b4 .ico{background:linear-gradient(135deg,#ef4444,#b91c1c)}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}
.text-muted{color:var(--muted)}.text-center{text-align:center}

/* Buttons */
.btn{border-radius:var(--radius-sm);border:none;padding:.65rem 1.2rem;font-weight:600;
  font-size:.9rem;display:inline-flex;align-items:center;gap:.4rem;transition:all .15s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2)}
.btn-ghost{background:#ede9fe;color:var(--brand)}
.btn-ghost:hover{background:#ddd6fe}
.btn-danger{background:#fee2e2;color:#991b1b}
.btn-danger:hover{background:#fecaca}
.btn-block{width:100%;justify-content:center}
.btn-sm{padding:.4rem .8rem;font-size:.8rem}

/* Table */
.table{width:100%;border-collapse:collapse;background:#fff}
.table thead th{background:#f8fafc;color:var(--muted);font-weight:600;font-size:.8rem;
  padding:.8rem 1rem;text-align:start;border-bottom:1px solid #e2e8f0}
.table tbody td{padding:.85rem 1rem;border-bottom:1px solid #f1f5f9;font-size:.88rem}
.table tbody tr:hover{background:#faf5ff}
.table tbody tr:last-child td{border-bottom:none}
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}

/* Badges */
.badge{padding:.25rem .65rem;border-radius:999px;font-size:.75rem;font-weight:700;display:inline-block}
.badge-success{background:#dcfce7;color:#166534}
.badge-warning{background:#fef3c7;color:#92400e}
.badge-danger{background:#fee2e2;color:#991b1b}
.badge-muted{background:#e2e8f0;color:#475569}
.badge-info{background:#dbeafe;color:#1e40af}

/* Alerts, Toast, Skeleton */
.alert{padding:.75rem 1rem;border-radius:var(--radius-sm);font-size:.87rem;margin-bottom:.5rem}
.alert-danger{background:#fee2e2;color:#991b1b}
.alert-success{background:#dcfce7;color:#166534}
.toast-wrap{position:fixed;top:1rem;inset-inline-end:1rem;z-index:2100;display:flex;flex-direction:column;gap:.5rem}
.toast{background:#fff;border-radius:12px;padding:.8rem 1rem;box-shadow:var(--shadow-lg);
  border-inline-start:4px solid var(--success);min-width:240px;font-size:.88rem;animation:slideIn .25s}
.toast.error{border-color:var(--danger)}
@keyframes slideIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.skeleton{background:linear-gradient(90deg,#f1f5f9,#e2e8f0,#f1f5f9);
  background-size:200% 100%;animation:sk 1.2s infinite;border-radius:10px;height:16px;margin:.4rem 0}
@keyframes sk{0%{background-position:200% 0}100%{background-position:-200% 0}}
.spinner{width:36px;height:36px;border:4px solid #e9d5ff;border-top-color:var(--brand);
  border-radius:50%;animation:spin 1s linear infinite;margin:2rem auto}
@keyframes spin{to{transform:rotate(360deg)}}
.empty{text-align:center;padding:3rem 1rem;color:var(--muted)}
.empty i{font-size:3rem;color:#cbd5e1;display:block;margin-bottom:1rem}

/* ═══════ Landing Page ═══════ */
body.landing{background:#fff}
.landing-header{background:#fff;border-bottom:1px solid #f1f5f9;position:sticky;top:0;z-index:100}
.landing-header .container{max-width:1200px;margin:auto;padding:.9rem 1.2rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.landing-header .brand{font-weight:800;font-size:1.1rem;color:var(--brand)}
.landing-nav{display:flex;gap:1.5rem;align-items:center}
.landing-nav a{color:var(--muted);font-size:.9rem;font-weight:500}
.landing-nav a:hover{color:var(--brand)}
.landing-actions{display:flex;align-items:center;gap:.7rem}
.btn-landing-primary{background:var(--brand);color:#fff;padding:.6rem 1.1rem;border-radius:10px;
  font-weight:700;font-size:.85rem;display:inline-flex;align-items:center;gap:.4rem}
.btn-landing-primary:hover{background:var(--brand-2);color:#fff}
@media(max-width:768px){.landing-nav{display:none}}

.loading-hero{padding:6rem 1rem;text-align:center}

.hero-landing{background:linear-gradient(135deg,#1e1b4b 0%,#6d28d9 60%,#a78bfa 100%);
  color:#fff;padding:5rem 1.2rem 6rem;position:relative;overflow:hidden}
.hero-landing::before{content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at top right,rgba(255,255,255,.15),transparent 60%)}
.hero-landing .container{max-width:1000px;margin:auto;position:relative;z-index:1;text-align:center}
.hero-landing h1{font-size:clamp(1.8rem,4.5vw,3.2rem);font-weight:800;line-height:1.25;margin:0 0 1rem}
.hero-landing p{font-size:clamp(1rem,1.8vw,1.2rem);opacity:.92;max-width:680px;margin:0 auto 2.2rem}
.hero-landing .cta-group{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}
.hero-landing .cta-primary,.hero-landing .cta-secondary{padding:.9rem 1.8rem;border-radius:14px;
  font-weight:700;font-size:.95rem;display:inline-flex;align-items:center;gap:.5rem;transition:all .2s}
.hero-landing .cta-primary{background:#fff;color:var(--brand);box-shadow:0 10px 30px rgba(0,0,0,.2)}
.hero-landing .cta-primary:hover{transform:translateY(-2px)}
.hero-landing .cta-secondary{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.3)}
.hero-landing .cta-secondary:hover{background:rgba(255,255,255,.2)}

.trust-section{background:#faf5ff;padding:2rem 1rem;display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;border-bottom:1px solid #f1f5f9}
.trust-section img{height:80px;background:#fff;padding:8px;border-radius:12px;box-shadow:var(--shadow)}

.landing-section{padding:4.5rem 1.2rem;max-width:1140px;margin:auto}
.landing-section h2{font-size:clamp(1.4rem,3vw,2.2rem);font-weight:800;text-align:center;margin:0 0 1rem}
.landing-section .section-sub{color:var(--muted);text-align:center;max-width:680px;margin:0 auto 2.5rem}

.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.3rem}
.feature-card{background:#fff;border-radius:var(--radius);padding:1.6rem;box-shadow:var(--shadow);
  transition:all .25s;border-top:4px solid var(--brand-3)}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.feature-card .ico{width:56px;height:56px;border-radius:14px;background:#ede9fe;color:var(--brand);
  display:grid;place-items:center;font-size:1.5rem;margin-bottom:1rem}
.feature-card h3{margin:0 0 .5rem;font-size:1.05rem;font-weight:700}
.feature-card p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.7}

.institutes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1.2rem}
.institute-card{background:#fff;border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:.7rem;transition:all .25s;border:1px solid #f1f5f9}
.institute-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-3)}
.institute-card .head{display:flex;align-items:center;gap:.8rem}
.institute-card .avatar{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-3));
  color:#fff;display:grid;place-items:center;font-size:1.4rem;font-weight:800}
.institute-card .name{font-weight:700;font-size:1rem}
.institute-card .sub{color:var(--muted);font-size:.82rem}
.institute-card .btn-select{margin-top:auto;background:var(--brand);color:#fff;padding:.7rem 1rem;
  border-radius:10px;text-align:center;font-weight:600;font-size:.88rem;display:block}
.institute-card .btn-select:hover{background:var(--brand-2);color:#fff}

.landing-empty{text-align:center;padding:3rem 1rem;background:#f8fafc;border-radius:var(--radius);
  color:var(--muted);border:2px dashed #e2e8f0}
.landing-empty i{font-size:3rem;display:block;margin-bottom:1rem;color:#cbd5e1}

.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.3rem;max-width:900px;margin:auto}
.pricing-card{background:#fff;border-radius:var(--radius);padding:2rem 1.5rem;box-shadow:var(--shadow);
  text-align:center;transition:all .25s;border:2px solid transparent}
.pricing-card.featured{border-color:var(--brand);transform:scale(1.02)}
.pricing-card h3{font-size:1.1rem;margin:0 0 1rem;font-weight:700}
.pricing-card .price{font-size:2rem;font-weight:800;color:var(--brand);margin:.5rem 0}
.pricing-card .price small{font-size:.85rem;color:var(--muted);font-weight:500}
.pricing-card ul{list-style:none;padding:0;margin:1.5rem 0;text-align:start}
.pricing-card ul li{padding:.4rem 0;color:var(--muted);font-size:.9rem}
.pricing-card ul li::before{content:"✓";color:var(--success);font-weight:800;margin-inline-end:.5rem}
.pricing-card .btn-plan{display:block;background:var(--brand);color:#fff;padding:.9rem;border-radius:12px;
  font-weight:700;margin-top:1rem}
.pricing-card .btn-plan:hover{background:var(--brand-2);color:#fff}
.pricing-card.featured .btn-plan{background:linear-gradient(135deg,var(--brand),var(--brand-3))}

.landing-footer{background:#1e1b4b;color:#c7d2fe;padding:3rem 1.2rem 2rem;margin-top:3rem}
.landing-footer .container{max-width:1140px;margin:auto;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2rem}
.landing-footer h4{color:#fff;font-size:.95rem;margin:0 0 1rem;font-weight:700}
.landing-footer a{color:#c7d2fe;display:block;margin:.4rem 0;font-size:.88rem}
.landing-footer a:hover{color:#fff}
.landing-footer .footer-badges{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}
.landing-footer .footer-badges img{height:60px;background:#fff;border-radius:8px;padding:4px}
.landing-footer .copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:2rem;padding-top:1.5rem;
  text-align:center;font-size:.82rem;color:#a5b4fc}

/* Mobile bottom tabs */
.mobile-tabs{position:fixed;bottom:0;inset-inline:0;background:#fff;border-top:1px solid #e2e8f0;
  display:none;justify-content:space-around;padding:.4rem 0;z-index:1000;box-shadow:0 -4px 20px rgba(76,29,149,.08)}
.mobile-tabs a{flex:1;text-align:center;color:var(--muted);font-size:.72rem;padding:.35rem 0;display:block}
.mobile-tabs a i{display:block;font-size:1.2rem;margin-bottom:.15rem}
.mobile-tabs a.active{color:var(--brand)}
@media(max-width:768px){
  .mobile-tabs{display:flex}
  body.landing{padding-bottom:70px}
  .hero-landing{padding:3rem 1rem 4rem}
  .landing-section{padding:3rem 1rem}
}