/* ===================================
   پژوهش سرا — سیستم طراحی (الهام از Figma SDS)
   توکن‌محور: رنگ / شعاع / فاصله / تایپوگرافی واحد
   =================================== */

/* فونت وزیرمتن — خودمیزبان (self-host) برای جلوگیری از فیلتر Google Fonts در ایران */
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-Regular.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap;}
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-Medium.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap;}
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-SemiBold.woff2') format('woff2');font-weight:600;font-style:normal;font-display:swap;}
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-Bold.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap;}
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-ExtraBold.woff2') format('woff2');font-weight:800;font-style:normal;font-display:swap;}
@font-face{font-family:'Vazirmatn';src:url('../assets/fonts/Vazirmatn-Black.woff2') format('woff2');font-weight:900;font-style:normal;font-display:swap;}

:root{
  --paper:#faf7f0;
  --card:#fffdf7;
  --ink:#1c1917;
  --muted:#78716c;
  --line:#e7e0d0;
  --gold:#c9a227;
  --gold-soft:#f5e9c8;
  --gold-ink:#7c5e10;
  --navy:#1c2436;
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 1px 3px rgba(28,25,23,.08);
  --shadow:0 8px 28px rgba(28,25,23,.10);
  --focus:rgba(201,162,39,.45);
  --header-h:62px;
  --font:'Vazirmatn','IRANYekan','Tahoma',sans-serif;
}

/* ---------- دسترسی‌پذیری: فوکوس واضح ---------- */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,label:focus-visible{
  outline:3px solid var(--focus);
  outline-offset:2px;
  border-radius:6px;
}
/* کاهش حرکت برای کاربرانی که motion sensitivity دارند */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}

/* ---------- Container ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
html{scroll-behavior:smooth}
#gallery{scroll-margin-top:calc(var(--header-h) + 70px)}

/* ---------- Header ---------- */
.header{
  background:rgba(255,253,247,.92);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(10px);
  min-height:var(--header-h);
}
.header-inner{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;gap:12px;min-height:var(--header-h)}
.logo{font-weight:800;font-size:16px;color:var(--ink);display:flex;align-items:center;gap:10px;cursor:pointer}
.logo img{height:38px;border-radius:8px}
nav{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
nav a{
  color:#44403c;text-decoration:none;padding:8px 14px;border-radius:99px;
  font-size:13.5px;font-weight:500;transition:all .2s ease;border:1px solid transparent;
}
nav a.active,nav a:hover{background:var(--ink);color:#fff}
nav a[href="gallery-3d.html"]{background:var(--gold)!important;color:#1c1917!important;font-weight:800!important}
nav a[href="gallery-3d.html"]:hover{filter:brightness(1.06)}

/* دکمه همبرگر (فقط موبایل) */
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;border-radius:8px;z-index:110}
.burger span{display:block;width:24px;height:2px;background:var(--ink);border-radius:99px;transition:all .25s ease}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* دکمه theme */
.icon-btn{background:none;border:none;cursor:pointer;font-size:18px;padding:6px;border-radius:50%;line-height:1}

@media (max-width:820px){
  .burger{display:flex}
  nav{
    position:fixed;top:var(--header-h);right:0;left:0;z-index:105;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(255,253,247,.98);padding:12px 16px 16px;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform-origin:top;transform:scaleY(0);opacity:0;pointer-events:none;transition:all .22s ease;
  }
  nav.open{transform:scaleY(1);opacity:1;pointer-events:auto}
  nav a{text-align:center;padding:11px 14px}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1000px 360px at 50% -80px,rgba(201,162,39,.28),transparent 70%),
    linear-gradient(180deg,#141a29 0%,#1c2436 55%,#2a3350 100%);
  color:#fff;padding:64px 0 56px;text-align:center;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:url('../assets/svg/banner.svg') center/cover no-repeat;
  opacity:.14;mix-blend-mode:screen;pointer-events:none;
}
.hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:80px;background:linear-gradient(180deg,transparent,var(--paper))}
.hero .container{position:relative;z-index:1}
.hero h1{margin:0 0 10px;font-size:clamp(24px,4.4vw,38px);font-weight:900;letter-spacing:-.3px;line-height:1.6;text-shadow:0 2px 24px rgba(0,0,0,.4)}
.hero h1 .gold{color:#e8c85a}
.hero p{opacity:.9;font-size:15px;max-width:640px;margin:0 auto;line-height:2}
.hero-cta{margin-top:22px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-3d{
  background:var(--gold);color:#1c1917;font-weight:800;border-radius:99px;
  padding:13px 30px;text-decoration:none;display:inline-block;transition:all .2s ease;font-size:14px;
  box-shadow:0 6px 22px rgba(201,162,39,.35);
}
.btn-3d:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(201,162,39,.45)}
.btn-ghost{
  background:#ffffff14;color:#fff;border:1px solid #ffffff2e;border-radius:99px;
  padding:13px 24px;text-decoration:none;font-size:13.5px;transition:all .2s ease;
}
.btn-ghost:hover{background:#ffffff24;transform:translateY(-2px)}
.hero-actions{display:flex;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.hero-actions input,.hero-actions select{
  padding:12px 16px;border-radius:99px;border:1px solid #ffffff2a;min-width:230px;
  font-family:inherit;font-size:13.5px;background:#ffffff10;color:#fff;transition:border-color .2s ease;
}
.hero-actions input::placeholder{color:#ffffff88}
.hero-actions select option{color:#1c1917}
.hero-actions input:focus,.hero-actions select:focus{outline:none;border-color:var(--gold)}

/* ---------- Stats ---------- */
.stats{margin:22px 0 14px;color:var(--muted);font-size:13.5px;display:flex;align-items:center;gap:8px}
.stats::before{content:'';width:28px;height:3px;background:var(--gold);border-radius:99px;display:inline-block}

/* ---------- Gallery Grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;padding-bottom:56px}
.card-item{
  background:var(--card);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);cursor:pointer;transition:all .22s ease;border:1px solid var(--line);
}
.card-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--gold)}
.card-item img,.card-item video.thumb{width:100%;height:200px;object-fit:cover;background:#efe9da;display:block}
.card-body{padding:16px 18px 18px}
.card-body h3{margin:6px 0 6px;font-size:15.5px;font-weight:700;line-height:1.8}
.badge{
  display:inline-block;background:var(--gold-soft);color:var(--gold-ink);
  font-size:12px;border-radius:99px;padding:2px 12px;margin-left:6px;font-weight:700;
}
.date{font-size:12px;color:var(--muted)}
.student{font-size:13px;color:#44403c}
.rank{
  font-size:12px;background:#fef9c3;border:1px solid #f5e9c8;border-radius:99px;
  padding:2px 10px;margin-top:6px;display:inline-block;color:#854d0e;font-weight:700;
}
.desc{
  font-size:13px;color:var(--muted);margin-top:8px;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.9;
}
.meta-row{font-size:12px;color:var(--muted);margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}

/* ---------- Empty ---------- */
.empty{background:var(--card);padding:52px;text-align:center;border-radius:var(--radius-lg);margin:24px 0;border:1px dashed var(--gold)}
.hidden{display:none!important}

/* ---------- Modal ---------- */
.modal{
  position:fixed;inset:0;background:rgba(20,16,8,.62);display:flex;align-items:center;justify-content:center;
  padding:24px;z-index:50;backdrop-filter:blur(6px);
}
.modal-box{
  background:var(--card);border-radius:var(--radius-lg);max-width:900px;width:100%;max-height:90vh;
  overflow:auto;padding:30px;position:relative;box-shadow:0 24px 60px rgba(0,0,0,.3);border:1px solid var(--line);
  animation:pop .3s cubic-bezier(.2,.9,.3,1.2);
}
@keyframes pop{from{transform:scale(.96) translateY(10px);opacity:0}}
.modal-box h2{margin:0;font-size:20px}
.modal-close{
  position:absolute;left:16px;top:16px;border:none;background:#0000000d;border-radius:50%;
  width:34px;height:34px;cursor:pointer;font-size:14px;color:var(--muted);transition:all .2s ease;font-family:inherit;
}
.modal-close:hover{background:#00000018;color:var(--ink)}
.meta{color:var(--muted);font-size:13px;margin:6px 0 12px}
.m-media{display:grid;gap:12px;margin-top:16px}
.m-media img,.m-media video{width:100%;border-radius:var(--radius);max-height:460px;background:#efe9da;border:1px solid var(--line)}

/* ---------- Footer ---------- */
.footer{text-align:center;padding:26px;color:var(--muted);font-size:13px;border-top:1px solid var(--line);background:var(--card)}

/* ---------- Admin ---------- */
.admin{padding:32px 24px 64px}
.card{background:var(--card);border-radius:var(--radius);padding:26px;margin-bottom:18px;box-shadow:var(--shadow-sm);border:1px solid var(--line)}
.card h2{margin:0 0 12px;font-size:17px}
.card input,.card select,.card textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);
  margin:6px 0;font-family:inherit;font-size:14px;transition:border-color .2s ease;background:#fff;
}
.card input:focus,.card select:focus,.card textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft)}
.row{display:flex;gap:12px}.row>*{flex:1}
.btn{
  background:var(--ink);color:#fff;border:none;border-radius:99px;padding:12px 22px;cursor:pointer;
  font-family:inherit;font-size:13.5px;font-weight:700;margin-top:8px;transition:all .2s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--paper)}
.btn.danger{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}
.btn.danger:hover{background:#fee2e2}
.upload-box{
  display:block;border:2px dashed var(--gold);background:var(--gold-soft);
  border-radius:var(--radius);padding:26px;text-align:center;margin:12px 0;cursor:pointer;transition:all .2s ease;font-size:14px;
}
.upload-box:hover{background:#f7e5b0}
.preview{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px;margin:12px 0}
.preview img,.preview video{width:100%;height:100px;object-fit:cover;border-radius:var(--radius-sm);background:#efe9da;border:1px solid var(--line)}
.admin-list{display:grid;gap:10px;margin-top:16px}
.admin-row{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:var(--radius);padding:12px;background:#fff}
.admin-row img{width:74px;height:56px;object-fit:cover;border-radius:var(--radius-sm);background:#efe9da}
.admin-row .grow{flex:1}
.admin-row small{color:var(--muted)}
.hint{font-size:12px;color:var(--muted);line-height:2}

/* ---------- Toolbar جستجو/فیلتر چسبان ---------- */
.toolbar{position:sticky;top:var(--header-h);z-index:90;background:rgba(250,247,240,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.toolbar .tb-inner{display:flex;gap:10px;align-items:center;padding:12px 24px;flex-wrap:wrap;max-width:1200px;margin:0 auto}
.toolbar input,.toolbar select{
  padding:10px 16px;border-radius:99px;border:1px solid var(--line);
  font-family:inherit;font-size:13.5px;background:#fff;color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease;min-width:0;flex:1;
}
.toolbar input::placeholder{color:var(--muted)}
.toolbar input:focus,.toolbar select:focus{border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-soft);outline:none}
.toolbar select{flex:0 1 210px;cursor:pointer}
.tb-reset{flex:0 0 auto;border:1px solid var(--line);background:#fff;border-radius:99px;padding:10px 16px;cursor:pointer;font-family:inherit;font-size:13px;color:var(--muted);transition:all .2s}
.tb-reset:hover{border-color:var(--gold);color:var(--gold-ink);background:var(--gold-soft)}
.tb-count{flex:0 0 auto;font-size:12.5px;color:var(--muted);white-space:nowrap}

/* ---------- کارت گالری: مدیا + overlay + پخش + فوکوس ---------- */
.card-item{position:relative}
.card-media{position:relative;overflow:hidden;background:#efe9da}
.card-media img,.card-media video.thumb{width:100%;height:200px;object-fit:cover;display:block;transition:transform .45s ease}
.card-item:hover .card-media img,.card-item:hover .card-media video.thumb,.card-item:focus-within .card-media img,.card-item:focus-within .card-media video.thumb{transform:scale(1.05)}
.card-overlay{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(rgba(28,25,23,0),rgba(28,25,23,.55));
  opacity:0;transition:opacity .25s ease;color:#fff;
}
.card-item:hover .card-overlay,.card-item:focus-within .card-overlay{opacity:1}
.card-overlay span{background:rgba(255,253,247,.95);color:var(--ink);font-size:12.5px;font-weight:700;padding:6px 16px;border-radius:99px;transform:translateY(8px);transition:transform .25s ease}
.card-item:hover .card-overlay span,.card-item:focus-within .card-overlay span{transform:translateY(0)}
.play-badge{position:absolute;top:10px;left:10px;background:#000a;color:#fff;border-radius:99px;padding:4px 12px;font-size:11.5px;display:flex;align-items:center;gap:5px;backdrop-filter:blur(4px)}
.card-item:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

/* ---------- اسکلتون لودینگ ---------- */
.skel{animation:sk 1.2s ease-in-out infinite;background:linear-gradient(90deg,#ece5d4 25%,#f7f2e6 37%,#ece5d4 63%);background-size:400% 100%;border-radius:var(--radius)}
@keyframes sk{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ---------- ظهور تدریجی هنگام اسکرول ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- مودال: ناوبری + قفل اسکرول ---------- */
.modal-nav{display:flex;justify-content:space-between;gap:10px;margin-top:14px}
.modal-nav button{flex:1;background:var(--gold-soft);border:1px solid var(--line);border-radius:99px;padding:10px;cursor:pointer;font-family:inherit;font-size:13px;font-weight:700;color:var(--gold-ink);transition:all .2s}
.modal-nav button:hover{background:var(--gold);color:#1c1917}
.modal-nav button:disabled{opacity:.4;pointer-events:none}
body.locked{overflow:hidden}

/* ---------- وضعیت خالی بهتر ---------- */
.empty-ic{font-size:48px;display:block;margin-bottom:10px;line-height:1}
.empty-title{font-size:16px;font-weight:800;margin:0 0 6px}
.empty p{margin:0 0 14px;color:var(--muted);font-size:13.5px}
.empty .btn{display:inline-block;width:auto}

/* ---------- حالت تاریک ---------- */
[data-theme="dark"]{
  --paper:#131117;--card:#1c1922;--ink:#ece6db;--muted:#a69f92;
  --line:#2c2833;--gold:#d8b84a;--gold-soft:#3a3120;--gold-ink:#eccf6d;
}
[data-theme="dark"] body{background:var(--paper)}
[data-theme="dark"] .header{background:rgba(19,17,23,.92);border-color:var(--line)}
[data-theme="dark"] nav a{color:#cfc7b9}
[data-theme="dark"] .burger span{background:var(--ink)}
[data-theme="dark"] .toolbar{background:rgba(19,17,23,.92)}
[data-theme="dark"] .toolbar input,[data-theme="dark"] .toolbar select,[data-theme="dark"] .tb-reset{background:#211e28;border-color:var(--line);color:var(--ink)}
[data-theme="dark"] .toolbar input::placeholder{color:#77706a}
[data-theme="dark"] .footer{background:var(--card);border-color:var(--line)}
[data-theme="dark"] .card-item{background:var(--card);border-color:var(--line)}
[data-theme="dark"] .modal-box{background:var(--card);border-color:var(--line)}
[data-theme="dark"] .empty{background:var(--card)}
[data-theme="dark"] .admin-row{background:#201d26;border-color:var(--line)}
[data-theme="dark"] .card{background:var(--card);border-color:var(--line)}
[data-theme="dark"] .card input,[data-theme="dark"] .card select,[data-theme="dark"] .card textarea{background:#211e28;color:var(--ink);border-color:var(--line)}
[data-theme="dark"] .btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
[data-theme="dark"] .upload-box{background:#241e14}
[data-theme="dark"] nav{background:rgba(19,17,23,.98)}
[data-theme="dark"] .skeleton{filter:brightness(.7)}

/* ---------- Responsive ---------- */
@media (max-width:768px){
  .hero{padding:48px 0 40px}
  .grid{grid-template-columns:1fr}
  .toolbar .tb-inner{flex-direction:column;align-items:stretch}
  .toolbar select,.tb-reset,.tb-count{flex:1 1 auto}
  .row{flex-direction:column}
  .modal-box{padding:20px}
}