/* ============================================================
   متغیرهای اصلی و ریست
   ============================================================ */
:root{
    --n:#0b2a5b;
    --n2:#143d7a;
    --n3:#08224c;
    --o:#f47c00;
    --o2:#e06f00;
    --bg:#e9f1fb;
    --bg2:#eef3fa;
    --t:#1a2b4a;
    --m:#6b7a94;
    --ok:#0b7a5b;
    --err:#c0392b;
    --radius:12px;
    --radius-lg:18px;
    --shadow:0 2px 10px rgba(11,42,91,.08);
    --shadow-lg:0 10px 30px rgba(11,42,91,.12);
}

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

body{
    font-family:'Vazirmatn',Tahoma,sans-serif;
    background:var(--bg);
    color:var(--t);
    line-height:1.7;
    font-size:15px;
}

a{color:inherit;text-decoration:none}
img{max-width:100%}

.w{max-width:1200px;margin:0 auto;padding:0 16px}

/* ============================================================
   استایل‌های پایه (برای صفحات داخلی: calc, prices, map, login, ...)
   ============================================================ */
.hd{background:var(--n);color:#fff}
.hd .w{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;gap:12px;align-items:center}
.brand b{display:block}
.brand small{color:#c9d6ee;font-size:12px}

nav{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
nav a.on{background:var(--o);padding:4px 12px;border-radius:8px}
nav .login{border:1px solid #fff;border-radius:20px;padding:4px 16px}

main{padding:16px}

.hero{
    background:linear-gradient(180deg,#7fa9d6,#f6c9a0 60%,#dbe6f2);
    border-radius:14px;
    text-align:center;
    padding:36px 16px;
    margin-bottom:16px;
}
.hero h1{color:var(--n);font-size:clamp(22px,4vw,34px)}
.hero em{color:var(--o);font-style:normal;font-size:1.3em}
.hero p{font-weight:700;color:var(--n);margin:6px 0 16px}

.search{
    display:flex;
    max-width:640px;
    margin:8px auto;
    background:#fff;
    border-radius:30px;
    overflow:hidden;
    box-shadow:0 4px 14px rgba(0,0,0,.15);
}
.search input{flex:1;border:0;padding:12px 18px;font:inherit;outline:0}
.search button{background:var(--o);color:#fff;border:0;padding:0 24px;font:inherit;cursor:pointer}

.grid{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-bottom:16px}
.card{
    background:#fff;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:16px;
    margin-bottom:16px;
}
.grid .card{margin:0}

h2{color:var(--n);margin-bottom:10px;font-size:18px}

.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.tile{border:1px solid #edf1f7;border-radius:10px;padding:10px;text-align:center}
.tile b{display:block;font-size:18px}
.tile small,.sm{color:var(--m);font-size:12.5px}

.warn{background:#fdebd9;color:#a04f00;padding:8px 12px;border-radius:8px;margin:8px 0}
.msg{background:#dff4e6;color:#1f7a45;padding:8px 12px;border-radius:8px;margin-bottom:12px}

.ql li{list-style:none;padding:8px 0;border-bottom:1px solid #eef2f8}
.sc{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:8px 10px;text-align:right;border-bottom:1px solid #eef2f8}
th{background:#f4f8fd;color:#51607a}

.fm{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-bottom:14px;align-items:end}
.fm label{display:flex;flex-direction:column;font-size:13px;color:var(--m);gap:4px}
.fm input,.fm select{padding:9px;border:1px solid #cfd8e6;border-radius:8px;font:inherit}

.btn{
    display:inline-block;
    background:var(--o);
    color:#fff;
    border:0;
    border-radius:10px;
    padding:10px 22px;
    font:inherit;
    font-weight:700;
    cursor:pointer;
    min-height:44px;
    transition:background .2s;
}
.btn:hover{background:var(--o2)}
.btn.sm{min-height:0;padding:3px 12px}

.bd{background:#fdebd9;color:#a04f00;border-radius:6px;padding:0 8px;font-size:12px}
.bd.ok{background:#dff4e6;color:#1f7a45}

.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.tabs a{background:#fff;padding:6px 14px;border-radius:8px}
.tabs a.on{background:var(--n);color:#fff}

.ft{background:var(--n3);color:#fff;font-size:13px}
.ft .w{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding-top:16px;padding-bottom:16px}

@media(max-width:800px){.grid{grid-template-columns:1fr}}
@media print{.hd,.ft,.btn,form{display:none}}

/* ============================================================
   سیستم تشخیص موبایل / دسکتاپ برای صفحه اصلی
   ============================================================ */
.mobile-only{display:block}
.desktop-only{display:none}

@media(min-width:1024px){
    .mobile-only{display:none !important}
    .desktop-only{display:block !important}
}

/* ============================================================
   استایل‌های موبایل (Mobile App-like)
   ============================================================ */
.app-home{
    background:var(--bg2);
    padding-bottom:90px;
    min-height:100vh;
}

.app-shell{
    max-width:480px;
    margin:0 auto;
    background:var(--bg2);
    min-height:100vh;
    position:relative;
    box-shadow:0 0 40px rgba(11,42,91,.08);
}

.app-header{
    background:linear-gradient(135deg,var(--n) 0%,var(--n2) 100%);
    padding:14px 18px;
    position:sticky;
    top:0;
    z-index:100;
}
.app-header-inner{display:flex;align-items:center;justify-content:space-between}
.app-brand{display:flex;align-items:center;gap:12px}
.app-logo{
    width:50px;height:50px;
    background:rgba(255,255,255,.1);
    border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    border:2px solid rgba(244,124,0,.4);
}
.app-title{display:flex;flex-direction:column;color:#fff}
.app-title b{font-size:16px;font-weight:800;letter-spacing:-0.3px}
.app-title small{font-size:12px;color:#c9d6ee;margin-top:2px}
.app-menu-btn{
    background:rgba(255,255,255,.12);
    border:0;width:42px;height:42px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;transition:background .2s;
}
.app-menu-btn:hover{background:rgba(255,255,255,.2)}

.app-hero{position:relative;height:140px;overflow:hidden}
.app-hero-img{
    width:100%;height:100%;
    background-size:cover;background-position:center;
    filter:grayscale(40%) brightness(.85);
}
.app-hero::after{
    content:'';position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,42,91,.3) 0%,rgba(11,42,91,.6) 100%);
}

.app-search-wrap{padding:0 16px;margin-top:-28px;position:relative;z-index:10}
.app-search{
    background:#fff;border-radius:16px;
    display:flex;align-items:center;
    box-shadow:0 8px 24px rgba(11,42,91,.12);
    overflow:hidden;border:1px solid #e4ecf5;
}
.app-search input{
    flex:1;border:0;padding:14px 16px;
    font-family:inherit;font-size:14px;outline:0;
    background:transparent;color:var(--t);
}
.app-search input::placeholder{color:#9aa8bd}
.app-search-btn{
    background:var(--o);border:0;width:48px;height:48px;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;margin:4px;border-radius:12px;
    transition:background .2s;
}
.app-search-btn:hover{background:var(--o2)}

.app-quick{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:20px 16px 10px}
.app-quick-card{
    background:#fff;border-radius:16px;
    padding:14px 6px;
    display:flex;flex-direction:column;align-items:center;gap:8px;
    text-decoration:none;color:var(--t);
    box-shadow:var(--shadow);border:1px solid #eef2f8;
    transition:transform .2s,box-shadow .2s;
}
.app-quick-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.app-quick-icon{
    width:52px;height:52px;
    background:var(--bg2);border-radius:14px;
    display:flex;align-items:center;justify-content:center;
}
.app-quick-card span{font-size:12px;font-weight:600;text-align:center;color:var(--n)}

.app-section{padding:18px 16px 8px}
.app-section-title{
    color:var(--n);font-size:17px;font-weight:800;
    margin-bottom:12px;display:flex;align-items:center;gap:8px;
}
.app-section-title::before{
    content:'';width:4px;height:20px;
    background:var(--o);border-radius:2px;
}
.app-last-update{font-size:12px;color:var(--m);margin-bottom:12px;padding-right:12px}
.app-last-update.stale{
    color:#a04f00;background:#fdebd9;
    padding:6px 12px;border-radius:8px;margin-right:-12px;
}

.app-prices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.app-price-card{
    background:#fff;border-radius:16px;
    padding:14px 10px;text-align:center;
    box-shadow:var(--shadow);border:1px solid #eef2f8;
    display:flex;flex-direction:column;gap:4px;
}
.app-price-name{font-size:15px;font-weight:800;color:var(--n)}
.app-price-type{font-size:11px;color:var(--m);margin-bottom:4px}
.app-price-value{font-size:14px;font-weight:700;color:var(--ok);direction:ltr;margin:4px 0}
.app-price-change{
    display:inline-flex;align-items:center;gap:3px;
    font-size:11px;font-weight:700;
    padding:3px 8px;border-radius:20px;
    align-self:center;margin-top:4px;
}
.app-price-change.up{background:#e6f7ef;color:var(--ok)}
.app-price-change.down{background:#fde8e8;color:var(--err)}

.app-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:16px}
.app-action-btn{
    background:linear-gradient(135deg,var(--n) 0%,var(--n2) 100%);
    color:#fff;border-radius:14px;
    padding:14px 12px;
    display:flex;align-items:center;justify-content:center;gap:8px;
    text-decoration:none;font-weight:700;font-size:13px;
    box-shadow:0 4px 14px rgba(11,42,91,.25);
    transition:transform .2s;
}
.app-action-btn:hover{transform:translateY(-2px)}
.app-action-btn span{white-space:nowrap}

.app-news{display:flex;flex-direction:column;gap:10px}
.app-news-item{
    background:#fff;border-radius:14px;
    padding:12px;
    display:flex;align-items:center;gap:12px;
    box-shadow:var(--shadow);border:1px solid #eef2f8;
    text-decoration:none;color:inherit;
    transition:transform .2s;
}
.app-news-item:hover{transform:translateX(-4px)}
.app-news-thumb{
    width:64px;height:64px;border-radius:12px;
    background-size:cover;background-position:center;
    flex-shrink:0;
}
.app-news-body{flex:1;min-width:0}
.app-news-title{font-size:14px;font-weight:700;color:var(--n);margin-bottom:4px;line-height:1.5}
.app-news-date{font-size:11px;color:var(--m)}
.app-news-arrow{flex-shrink:0;opacity:.5}

.app-bottom-nav{
    position:fixed;bottom:0;left:50%;transform:translateX(-50%);
    width:100%;max-width:480px;
    background:#fff;
    display:grid;grid-template-columns:repeat(5,1fr);
    padding:8px 4px;
    padding-bottom:calc(8px + env(safe-area-inset-bottom));
    box-shadow:0 -4px 20px rgba(11,42,91,.08);
    border-top:1px solid #eef2f8;
    z-index:100;
}
.app-nav-item{
    display:flex;flex-direction:column;align-items:center;gap:3px;
    text-decoration:none;padding:4px 2px;
    transition:all .2s;
}
.app-nav-item span{font-size:10px;font-weight:600;color:var(--m)}
.app-nav-item.active span{color:var(--n);font-weight:800}
.app-nav-item.active svg{transform:scale(1.1)}

.app-empty{
    text-align:center;color:var(--m);font-size:13px;
    padding:20px;background:#fff;border-radius:14px;
}

/* ============================================================
   استایل‌های دسکتاپ (Desktop Website)
   ============================================================ */
.dt-container{max-width:1280px;margin:0 auto;padding:0 24px}

.dt-topbar{background:var(--n3);color:#c9d6ee;font-size:12px;padding:8px 0}
.dt-topbar .dt-container{display:flex;justify-content:space-between;align-items:center}
.dt-topbar-right{display:flex;align-items:center;gap:8px}
.dt-online-dot{
    width:8px;height:8px;background:#22c55e;border-radius:50%;
    box-shadow:0 0 8px #22c55e;
    animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.dt-sep{opacity:.4}
.dt-topbar-left a{color:#c9d6ee;text-decoration:none;display:flex;align-items:center;gap:6px}
.dt-topbar-link:hover{color:var(--o)}

.dt-header{
    background:linear-gradient(135deg,var(--n) 0%,var(--n2) 100%);
    padding:14px 0;
    box-shadow:0 4px 20px rgba(11,42,91,.2);
    position:sticky;top:0;z-index:100;
}
.dt-header .dt-container{display:flex;align-items:center;justify-content:space-between;gap:20px}
.dt-brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:#fff}
.dt-logo{
    width:58px;height:58px;
    background:rgba(255,255,255,.08);border-radius:16px;
    display:flex;align-items:center;justify-content:center;
    border:2px solid rgba(244,124,0,.5);
}
.dt-brand-text{display:flex;flex-direction:column}
.dt-brand-text b{font-size:18px;font-weight:800;letter-spacing:-0.3px}
.dt-brand-text small{font-size:13px;color:var(--o);margin-top:2px;font-weight:600}
.dt-brand-text .dt-brand-sub{font-size:11px;color:#c9d6ee;margin-top:2px}

.dt-nav{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.dt-nav a{
    color:#fff;text-decoration:none;
    padding:8px 14px;border-radius:10px;
    font-size:14px;font-weight:600;
    transition:all .2s;
    display:flex;align-items:center;gap:6px;
}
.dt-nav a:hover{background:rgba(255,255,255,.1)}
.dt-nav a.on{background:var(--o);color:#fff}

.dt-hero{position:relative;height:420px;overflow:hidden}
.dt-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.dt-hero-overlay{
    position:absolute;inset:0;
    background:linear-gradient(135deg,rgba(11,42,91,.85) 0%,rgba(11,42,91,.5) 50%,rgba(11,42,91,.7) 100%);
}
.dt-hero-content{
    position:relative;z-index:2;height:100%;
    display:flex;flex-direction:column;justify-content:center;align-items:center;
    text-align:center;color:#fff;padding:40px 24px;
}
.dt-hero-content h1{
    font-size:clamp(28px,4vw,48px);font-weight:900;
    line-height:1.3;margin-bottom:16px;
    text-shadow:0 4px 20px rgba(0,0,0,.3);
}
.dt-hero-content h1 span{color:var(--o);display:block;margin-top:8px}
.dt-hero-tagline{font-size:18px;color:#e9f1fb;margin-bottom:28px;font-weight:500}

.dt-search{
    background:#fff;border-radius:50px;
    display:flex;align-items:center;
    max-width:680px;width:100%;
    box-shadow:0 10px 40px rgba(0,0,0,.25);
    overflow:hidden;
}
.dt-search input{
    flex:1;border:0;padding:16px 22px;
    font-family:inherit;font-size:15px;outline:0;
    color:var(--t);
}
.dt-search input::placeholder{color:#9aa8bd}
.dt-search button[type=submit]{
    background:var(--o);border:0;width:54px;height:54px;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;margin:4px;border-radius:50%;
    transition:background .2s;
}
.dt-search button[type=submit]:hover{background:var(--o2)}
.dt-search-filter{
    background:#e9f1fb !important;border:0;
    width:46px;height:46px;border-radius:50%;
    margin:4px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:background .2s;
}
.dt-search-filter:hover{background:#d4e2f5 !important}

.dt-main-grid{padding:30px 0;background:var(--bg2)}
.dt-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.dt-card{
    background:#fff;border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow);border:1px solid #e4ecf5;
    transition:transform .25s,box-shadow .25s;
}
.dt-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}

.dt-card-head{
    background:linear-gradient(135deg,var(--n) 0%,var(--n2) 100%);
    color:#fff;padding:16px 18px;
    display:flex;align-items:center;gap:12px;
}
.dt-card-head h3{font-size:16px;font-weight:700;margin:0}

.dt-card-head-dark{
    background:linear-gradient(135deg,var(--n) 0%,var(--n2) 100%);
    color:#fff;padding:14px 18px;
    display:flex;align-items:center;gap:10px;
}
.dt-card-head-dark h3{font-size:15px;font-weight:700;margin:0;flex:1}
.dt-see-all{color:var(--o);font-size:12px;text-decoration:none;font-weight:600}

.dt-card-calc{display:flex;flex-direction:column}
.dt-card-calc p{padding:14px 18px 8px;font-size:13px;color:var(--m);line-height:1.7;flex:1}
.dt-calc-visual{
    padding:10px 18px;
    display:flex;align-items:flex-end;justify-content:space-between;
    height:110px;
}
.dt-coins{display:flex;gap:4px;align-items:flex-end}
.dt-coin{
    width:22px;height:22px;
    background:linear-gradient(135deg,var(--o),#ff9a3c);
    border-radius:50%;border:2px solid var(--o2);
}
.dt-coin:nth-child(2){width:26px;height:26px}
.dt-coin:nth-child(3){width:30px;height:30px}
.dt-card-btn{
    display:block;background:var(--o);color:#fff;
    text-align:center;padding:12px;
    font-weight:700;text-decoration:none;
    margin:0 18px 18px;border-radius:10px;
    transition:background .2s;
}
.dt-card-btn:hover{background:var(--o2)}

.dt-card-wide{grid-column:span 2}
.dt-products-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:14px}
.dt-product{
    background:#f4f8fd;border-radius:12px;
    padding:10px;text-align:center;
    border:1px solid #e4ecf5;
}
.dt-product-img{height:50px;display:flex;align-items:center;justify-content:center;margin-bottom:6px}
.dt-product-name{font-size:13px;font-weight:700;color:var(--n);margin-bottom:4px}
.dt-product-price{font-size:14px;font-weight:800;color:var(--ok);direction:ltr;margin-bottom:4px}
.dt-product-change{
    font-size:11px;font-weight:700;
    padding:3px 8px;border-radius:20px;
    display:inline-block;
}
.dt-product-change.up{background:#e6f7ef;color:var(--ok)}
.dt-product-change.down{background:#fde8e8;color:var(--err)}

.dt-map-link{
    display:block;text-align:center;
    color:var(--n);font-weight:600;font-size:13px;
    padding:10px;text-decoration:none;
    border-top:1px solid #eef2f8;
}
.dt-map-link:hover{background:#f4f8fd}

.dt-quick-list{list-style:none;padding:8px 18px 14px}
.dt-quick-list li{border-bottom:1px solid #eef2f8}
.dt-quick-list li:last-child{border:0}
.dt-quick-list a{
    display:flex;align-items:center;gap:10px;
    padding:10px 0;
    color:var(--t);text-decoration:none;
    font-size:13px;font-weight:600;
    transition:color .2s;
}
.dt-quick-list a:hover{color:var(--o)}

.dt-bottom-grid{padding:0 0 30px;background:var(--bg2)}
.dt-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}

.dt-news-list{display:flex;flex-direction:column}
.dt-news-item{
    display:flex;align-items:center;gap:14px;
    padding:14px 18px;
    border-bottom:1px solid #eef2f8;
    text-decoration:none;color:inherit;
    transition:background .2s;
}
.dt-news-item:hover{background:#f4f8fd}
.dt-news-item:last-child{border:0}
.dt-news-thumb{
    width:72px;height:72px;border-radius:12px;
    background-size:cover;background-position:center;
    flex-shrink:0;
}
.dt-news-body{flex:1;min-width:0}
.dt-news-title{font-size:14px;font-weight:700;color:var(--n);margin-bottom:4px;line-height:1.5}
.dt-news-date{font-size:11px;color:var(--m)}

.dt-compare-table{width:100%;border-collapse:collapse}
.dt-compare-table th{
    background:#f4f8fd;color:#51607a;
    padding:12px 18px;text-align:right;
    font-size:13px;font-weight:700;
}
.dt-compare-table td{padding:14px 18px;border-bottom:1px solid #eef2f8;font-size:14px}
.dt-factory-cell{display:flex;align-items:center;gap:10px}
.dt-factory-logo{
    width:36px;height:36px;
    background:linear-gradient(135deg,var(--n),var(--n2));
    color:#fff;border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    font-weight:800;font-size:16px;
}
.dt-diff-badge{
    display:inline-block;padding:4px 10px;
    border-radius:20px;font-size:12px;font-weight:700;
}
.dt-diff-badge.up{background:#fde8e8;color:var(--err)}
.dt-diff-badge.down{background:#e6f7ef;color:var(--ok)}

.dt-cta{padding:30px 0;background:var(--bg2)}
.dt-cta-inner{
    position:relative;border-radius:20px;
    overflow:hidden;height:220px;
    box-shadow:0 10px 40px rgba(11,42,91,.15);
}
.dt-cta-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.dt-cta-overlay{
    position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(11,42,91,.95) 0%,rgba(11,42,91,.7) 60%,transparent 100%);
}
.dt-cta-content{
    position:relative;z-index:2;height:100%;
    display:flex;flex-direction:column;justify-content:center;
    padding:0 50px;color:#fff;
}
.dt-cta-content h2{
    font-size:32px;font-weight:900;
    margin-bottom:8px;line-height:1.3;
}
.dt-cta-content h2 span{color:var(--o);display:block;margin-top:4px}
.dt-cta-content p{font-size:16px;color:#e9f1fb;margin-bottom:18px}
.dt-cta-btn{
    display:inline-block;background:var(--o);color:#fff;
    padding:12px 24px;border-radius:10px;
    font-weight:700;text-decoration:none;
    transition:background .2s;
    width:fit-content;
}
.dt-cta-btn:hover{background:var(--o2)}

.dt-footer{background:var(--n3);color:#fff;padding:40px 0 0}
.dt-footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1.5fr;
    gap:30px;margin-bottom:30px;
}
.dt-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.dt-footer-brand b{display:block;font-size:16px}
.dt-footer-brand small{color:#c9d6ee;font-size:12px}
.dt-footer-desc{color:#c9d6ee;font-size:13px;line-height:1.8;margin-bottom:16px}
.dt-social{display:flex;gap:10px}
.dt-social a{
    width:36px;height:36px;
    background:rgba(255,255,255,.08);border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    transition:background .2s;
}
.dt-social a:hover{background:var(--o)}
.dt-footer-col h4{
    color:#fff;font-size:15px;font-weight:700;
    margin-bottom:14px;padding-bottom:8px;
    border-bottom:2px solid var(--o);
    display:inline-block;
}
.dt-footer-col ul{list-style:none}
.dt-footer-col li{margin-bottom:8px}
.dt-footer-col a{color:#c9d6ee;font-size:13px;transition:color .2s}
.dt-footer-col a:hover{color:var(--o)}
.dt-contact-list li{
    display:flex;align-items:flex-start;gap:10px;
    color:#c9d6ee;font-size:13px;line-height:1.6;
}
.dt-footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);
    padding:16px 0;
    display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
    font-size:12px;color:#c9d6ee;
}

/* ============================================================
   ریسپانسیو دسکتاپ (تبلت و موبایل بزرگ)
   ============================================================ */
@media(max-width:1200px){
    .dt-grid-4{grid-template-columns:repeat(2,1fr)}
    .dt-card-wide{grid-column:span 2}
    .dt-footer-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:900px){
    .dt-grid-2{grid-template-columns:1fr}
    .dt-hero{height:340px}
    .dt-hero-content h1{font-size:28px}
    .dt-nav{display:none}
}

@media(max-width:600px){
    .dt-grid-4{grid-template-columns:1fr}
    .dt-card-wide{grid-column:span 1}
    .dt-products-row{grid-template-columns:repeat(2,1fr)}
    .dt-footer-grid{grid-template-columns:1fr}
    .dt-cta-content{padding:0 24px}
    .dt-cta-content h2{font-size:22px}
}

/* ============================================================
   ریسپانسیو موبایل (برای shell در دسکتاپ)
   ============================================================ */
@media(min-width:481px){
    .app-home{padding:20px 0 20px}
    .app-shell{
        border-radius:24px;overflow:hidden;
        min-height:auto;
        box-shadow:0 10px 60px rgba(11,42,91,.15);
    }
    .app-bottom-nav{
        position:sticky;bottom:0;transform:none;left:0;
        max-width:none;border-radius:0 0 24px 24px;
    }
}
/* ============================================================
   استایل‌های جدید: منوی شناور چپ، پاپ‌آپ ماشین‌حساب و فوتر
   ============================================================ */

/* --- Sidebar Menu (منوی شناور سمت چپ) --- */
.sidebar-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998;
  opacity: 0; visibility: hidden; transition: all 0.3s ease;
}
.sidebar-overlay.active { opacity: 1; visibility: visible; }

.sidebar-menu {
  position: fixed; top: 0; left: 0; width: 280px; height: 100vh;
  background: #fff; z-index: 999; transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex; flex-direction: column; box-shadow: 4px 0 20px rgba(0,0,0,0.1);
}
.sidebar-menu.open { transform: translateX(0); }

.sidebar-header {
  padding: 20px; background: var(--n); color: #fff;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 700; font-size: 16px;
}
.sidebar-close {
  background: rgba(255,255,255,0.2); border: 0; color: #fff;
  width: 32px; height: 32px; border-radius: 50%; font-size: 20px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}

.sidebar-nav { flex: 1; padding: 10px 0; overflow-y: auto; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px; padding: 14px 20px;
  color: var(--t); text-decoration: none; font-weight: 600; font-size: 15px;
  transition: background 0.2s; border-right: 3px solid transparent;
}
.sidebar-nav a:hover { background: var(--bg2); border-right-color: var(--o); color: var(--o); }

.sidebar-footer {
  padding: 20px; border-top: 1px solid #eef2f8; background: var(--bg2);
}
.sidebar-login-btn {
  display: block; width: 100%; text-align: center; padding: 12px;
  background: var(--o); color: #fff; border-radius: 10px; font-weight: 700;
  text-decoration: none; margin-bottom: 10px;
}
.sidebar-logout {
  display: block; text-align: center; color: var(--err); font-size: 14px;
  text-decoration: none; font-weight: 600;
}

.dt-menu-trigger {
  background: rgba(255,255,255,0.15); border: 0; color: #fff;
  padding: 8px 16px; border-radius: 8px; cursor: pointer; font-family: inherit;
  font-weight: 600; display: flex; align-items: center; gap: 6px;
}

/* --- Calculator Modal (پاپ‌آپ ماشین‌حساب) --- */
.calc-modal {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(11, 42, 91, 0.6); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 20px;
}
.calc-modal-content {
  background: #fff; border-radius: 16px; width: 100%; max-width: 450px;
  padding: 24px; position: relative; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  max-height: 90vh; overflow-y: auto;
}
.calc-modal-close {
  position: absolute; top: 16px; left: 16px; background: #f4f8fd;
  border: 0; width: 36px; height: 36px; border-radius: 50%;
  font-size: 24px; color: var(--t); cursor: pointer; display: flex;
  align-items: center; justify-content: center; transition: background 0.2s;
}
.calc-modal-close:hover { background: #fde8e8; color: var(--err); }
.calc-modal-content h3 {
  color: var(--n); margin-bottom: 20px; font-size: 18px;
  padding-bottom: 12px; border-bottom: 2px solid var(--bg2);
}

/* --- Footer Update --- */
.dt-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 16px 0; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; font-size: 13px; color: #c9d6ee;
}
.dt-footer-bottom span:last-child {
  color: var(--o); font-weight: 600;
}

/* Responsive adjustments for sidebar */
@media (max-width: 1023px) {
  .dt-menu-trigger { display: none; } /* در موبایل از دکمه هدر اپ استفاده می‌شود */
}