/* ============================================================
   بانک هوش مصنوعی — ai.bigi.ir
   استایل صفحه | توسعه: مهندس رحمان محسن بیگی — bigi.ir
   پالت رنگی: آبی تیره + نارنجی + خاکستری روشن
   ============================================================ */

:root{
    --navy-950:#0a1b31;
    --navy-900:#0e2440;
    --navy-800:#123057;
    --navy-700:#1a3f6e;
    --navy-600:#24508a;
    --navy-100:#dbe5f1;
    --navy-50:#edf3fa;
    --orange-500:#f97316;
    --orange-600:#e5650a;
    --orange-100:#ffedd5;
    --green-500:#16a34a;
    --gray-bg:#f2f4f7;
    --gray-100:#e7ebf0;
    --gray-300:#c7ced7;
    --gray-500:#68737f;
    --gray-700:#3a4552;
    --white:#ffffff;
    --radius:16px;
    --shadow-sm:0 1px 3px rgba(10,27,49,.07), 0 4px 14px rgba(10,27,49,.06);
    --shadow-md:0 8px 26px rgba(10,27,49,.13);
    --shadow-lg:0 18px 50px rgba(10,27,49,.22);
    --font:'Samim', Tahoma, Arial, sans-serif;
}

/* ---------- پایه ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:var(--font);
    background:var(--gray-bg);
    color:var(--gray-700);
    line-height:1.9;
    direction:rtl;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}
::selection{background:var(--orange-500);color:#fff}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
:is(a,button,input):focus-visible{outline:2px solid var(--orange-500);outline-offset:2px;border-radius:6px}
.container{max-width:1280px;margin-inline:auto;padding-inline:20px}
#listAnchor{scroll-margin-top:150px}

/* ---------- دکمه‌ها ---------- */
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:11px;padding:11px 26px;font-weight:700;font-size:.95rem;
    transition:all .2s ease;
}
.btn-orange{background:var(--orange-500);color:#fff;box-shadow:0 6px 16px rgba(249,115,22,.35)}
.btn-orange:hover{background:var(--orange-600);transform:translateY(-2px)}
.btn-outline{border:1.5px solid var(--navy-700);color:var(--navy-700)}
.btn-outline:hover{background:var(--navy-700);color:#fff}
.btn-reset{
    background:var(--orange-100);color:var(--orange-600);
    padding:8px 18px;border-radius:10px;font-weight:700;font-size:.88rem;transition:all .2s;
    height:fit-content;
}
.btn-reset:hover{background:var(--orange-500);color:#fff}

/* ---------- هدر ---------- */
.site-header{
    position:sticky;top:0;z-index:120;
    background:var(--navy-950);
    border-bottom:1px solid rgba(255,255,255,.07);
    box-shadow:0 2px 14px rgba(0,0,0,.18);
}
.header-inner{height:70px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:12px}
.brand-icon{
    width:46px;height:46px;border-radius:12px;flex:none;
    background:linear-gradient(135deg,var(--orange-500),#fb923c);
    color:#fff;font-weight:700;font-size:1.05rem;letter-spacing:.5px;
    display:grid;place-items:center;
    box-shadow:0 4px 14px rgba(249,115,22,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.5}
.brand-text strong{color:#fff;font-size:1.12rem}
.brand-text small{color:var(--orange-500);font-size:.78rem;font-weight:600}
.main-nav{display:flex;align-items:center;gap:8px}
.main-nav a{
    color:#cbd7e6;font-size:.9rem;padding:8px 15px;border-radius:10px;transition:all .2s;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.nav-cta{
    background:var(--orange-500);color:#fff;font-weight:700;
    box-shadow:0 4px 14px rgba(249,115,22,.35);
}
.main-nav a.nav-cta:hover{background:var(--orange-600)}

/* ---------- بخش معرفی (Hero) ---------- */
.hero{
    position:relative;overflow:hidden;color:#fff;
    padding:58px 0 62px;
    background:
        radial-gradient(900px 400px at 88% -15%, rgba(249,115,22,.20), transparent 60%),
        radial-gradient(700px 380px at 8% 115%, rgba(36,80,138,.55), transparent 60%),
        linear-gradient(160deg, var(--navy-900), var(--navy-800));
}
.hero::before{ /* الگوی نقطه‌چین ظریف پس‌زمینه */
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:radial-gradient(rgba(255,255,255,.05) 1px, transparent 1.5px);
    background-size:26px 26px;
}
.hero-inner{position:relative;z-index:1;text-align:center;max-width:840px;margin-inline:auto}
.hero h1{font-size:clamp(1.7rem, 4.5vw, 2.7rem);font-weight:700;margin-bottom:12px}
.hero h1 .accent{color:var(--orange-500)}
.hero-sub{color:#b9c7d9;font-size:1.02rem;max-width:660px;margin:0 auto 30px}
.search-box{
    display:flex;align-items:center;gap:6px;
    background:var(--white);border-radius:14px;padding:8px;
    box-shadow:var(--shadow-lg);
}
.search-icon{flex:none;width:22px;height:22px;margin-inline-start:10px;stroke:var(--gray-500)}
.search-box input{
    flex:1;min-width:0;border:none;outline:none;background:transparent;
    font-family:inherit;font-size:1rem;color:var(--gray-700);
}
.search-box input::placeholder{color:var(--gray-300)}
.hero-stats{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:26px}
.hero-stats span{
    background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
    padding:5px 16px;border-radius:999px;font-size:.85rem;color:#d7e1ee;
}
.hero-stats b{color:var(--orange-500)}

/* ---------- نوار چسبان دسته‌بندی‌ها ---------- */
.toolbar{
    position:sticky;top:70px;z-index:90;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--gray-100);
    box-shadow:var(--shadow-sm);
}
.categories{
    display:flex;gap:8px;overflow-x:auto;padding:12px 0;
    -webkit-overflow-scrolling:touch;scrollbar-width:thin;
}
.categories::-webkit-scrollbar{height:5px}
.categories::-webkit-scrollbar-thumb{background:var(--gray-300);border-radius:3px}
.chip{
    flex:none;padding:7px 16px;border-radius:999px;font-size:.88rem;font-weight:600;
    color:var(--gray-700);background:var(--gray-100);transition:all .2s;
}
.chip:hover{background:var(--navy-100);color:var(--navy-700)}
.chip.active{background:var(--navy-800);color:#fff;box-shadow:0 4px 12px rgba(18,48,87,.3)}
.chip .count{opacity:.7;font-size:.78rem;margin-inline-start:4px}

/* ---------- محتوای اصلی ---------- */
.main-content{padding:34px 20px 60px}
.results-header{
    display:flex;align-items:center;justify-content:space-between;
    gap:12px;flex-wrap:wrap;margin-bottom:22px;
}
.results-header h2{font-size:1.35rem;color:var(--navy-900)}
.results-header p{font-size:.9rem;color:var(--gray-500)}
.results-header b{color:var(--orange-600)}

/* ---------- شبکه کارت‌ها ---------- */
.tools-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(285px, 1fr));
    gap:24px;
}

/* کارت ابزار */
.tool-card{
    background:var(--white);border-radius:var(--radius);overflow:hidden;
    box-shadow:var(--shadow-sm);border:1px solid rgba(10,27,49,.04);
    display:flex;flex-direction:column;
    transition:transform .25s ease, box-shadow .25s ease;
}
.tool-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}

.tool-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--navy-800)}
.tool-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.tool-card:hover .tool-thumb img{transform:scale(1.06)}

.badge-version{
    position:absolute;bottom:10px;inset-inline-start:10px;
    background:rgba(10,27,49,.85);color:#fff;backdrop-filter:blur(4px);
    font-size:.74rem;font-weight:700;padding:3px 11px;border-radius:999px;
}
.badge-free{
    position:absolute;top:10px;inset-inline-end:10px;
    font-size:.74rem;font-weight:700;padding:3px 11px;border-radius:999px;
    backdrop-filter:blur(4px);color:#fff;
}
.badge-free.free{background:rgba(22,163,74,.93)}
.badge-free.paid{background:rgba(249,115,22,.95)}

.tool-body{padding:18px;display:flex;flex-direction:column;flex:1}
.tool-title{font-size:1.1rem;color:var(--navy-900);font-weight:700;margin-bottom:6px}
.tool-desc{
    font-size:.88rem;color:var(--gray-500);line-height:1.95;min-height:5.4em;
    display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.tool-meta{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.tool-category{
    background:var(--navy-50);color:var(--navy-700);border:1px solid var(--navy-100);
    font-size:.76rem;font-weight:600;padding:2px 12px;border-radius:999px;
}
.tool-date{font-size:.76rem;color:var(--gray-500)}

.tool-actions{display:flex;gap:10px;margin-top:auto;padding-top:16px}
.tool-actions a{
    flex:1;display:flex;align-items:center;justify-content:center;
    padding:9px 8px;border-radius:10px;font-size:.88rem;font-weight:700;transition:all .2s;
}
.link-tutorial{border:1.5px solid var(--navy-700);color:var(--navy-700)}
.link-tutorial:hover{background:var(--navy-700);color:#fff}
.link-site{background:var(--orange-500);color:#fff;box-shadow:0 4px 12px rgba(249,115,22,.3)}
.link-site:hover{background:var(--orange-600);transform:translateY(-2px)}

/* ---------- صفحه‌بندی ---------- */
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:42px;flex-wrap:wrap}
.page-btn{
    min-width:42px;height:42px;padding:0 14px;border-radius:11px;
    background:var(--white);color:var(--gray-700);
    font-weight:700;font-size:.95rem;box-shadow:var(--shadow-sm);
    display:inline-flex;align-items:center;justify-content:center;transition:all .2s;
}
.page-btn:hover:not(:disabled):not(.active):not(.dots){background:var(--navy-800);color:#fff}
.page-btn.active{background:var(--orange-500);color:#fff;box-shadow:0 5px 15px rgba(249,115,22,.4)}
.page-btn:disabled{opacity:.45;cursor:not-allowed}
.page-btn.dots{background:transparent;box-shadow:none;opacity:1;cursor:default;min-width:26px}

/* ---------- حالت خالی و خطا ---------- */
.empty-state,.error-state{
    text-align:center;padding:64px 20px;
    background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow-sm);
}
.state-icon{width:64px;height:64px;color:var(--gray-300);margin:0 auto 14px}
.error-state .state-icon{color:var(--orange-500)}
.empty-state h3,.error-state h3{color:var(--navy-900);font-size:1.15rem;margin-bottom:8px}
.empty-state p,.error-state p{color:var(--gray-500);font-size:.92rem;margin-bottom:18px}

/* ---------- اسکلت بارگذاری ---------- */
.sk{background:var(--gray-100);position:relative;border-radius:8px;overflow:hidden}
.sk::after{
    content:"";position:absolute;inset:0;transform:translateX(-100%);
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.75),transparent);
    animation:shimmer 1.3s infinite;
}
@keyframes shimmer{100%{transform:translateX(100%)}}
.sk-img{aspect-ratio:16/10;border-radius:0}
.sk-body{padding:18px;display:grid;gap:10px}
.sk-line{height:13px}
.sk-btn{height:40px;margin-top:8px}

/* ---------- فوتر ---------- */
.site-footer{background:var(--navy-950);color:#aebccd}
.footer-inner{
    display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;
    padding:50px 20px 36px;
}
.footer-brand strong{color:#fff;font-size:1.2rem;display:block;margin-bottom:10px}
.footer-brand p{font-size:.9rem;line-height:2.1;margin-bottom:12px}
.footer-brand a{color:var(--orange-500)}
.footer-domain{color:var(--orange-500);font-weight:700;font-size:.9rem}
.footer-links h4{
    color:#fff;font-size:1rem;margin-bottom:14px;
    position:relative;padding-bottom:10px;
}
.footer-links h4::after{
    content:"";position:absolute;bottom:0;right:0;
    width:34px;height:3px;background:var(--orange-500);border-radius:2px;
}
.footer-links a{display:block;font-size:.9rem;padding:5px 0;transition:color .2s;position:relative;padding-right:14px}
.footer-links a::before{
    content:"";position:absolute;right:0;top:1em;
    width:6px;height:6px;border-radius:50%;background:var(--orange-500);
}
.footer-links a:hover{color:var(--orange-500)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.07);padding:18px 0;text-align:center;font-size:.85rem}
.footer-bottom b{color:#fff}

/* ---------- واکنش‌گرایی (موبایل) ---------- */
@media (max-width:768px){
    .main-nav a{font-size:.84rem;padding:7px 12px}
    .hero{padding:44px 0 50px}
}
@media (max-width:600px){
    .site-header{position:static;height:auto}
    .header-inner{height:auto;flex-direction:column;gap:10px;padding-block:12px}
    .toolbar{position:static}
    #listAnchor{scroll-margin-top:20px}
    .footer-inner{grid-template-columns:1fr;gap:28px}
}
@media (max-width:560px){
    .tools-grid{grid-template-columns:1fr}
    .results-header{justify-content:center;text-align:center}
}
@media (max-width:420px){
    .search-box{flex-wrap:wrap;padding:10px}
    .search-box input{width:100%}
    .search-icon{display:none}
    #searchBtn{width:100%}
}
@media (prefers-reduced-motion: reduce){
    *{animation:none!important;transition:none!important}
    html{scroll-behavior:auto}
}