:root{
  --navy-950:#050d1a; --navy-900:#0a1628; --navy-800:#0f2038; --navy-700:#16304f;
  --steel:#1e4066; --steel-light:#2a568a; --gold:#d9a63a; --gold-light:#f0c768;
  --sea:#2e8fb8; --foam:#7fc4dd; --ink:#eef4fa; --muted:#9db2c7; --ok:#3ecf8e; --err:#e05c5c;
  --card:#0f2038ee; --line:#23405f;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;background:var(--navy-950);color:var(--ink);line-height:1.6;overflow-x:hidden}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;letter-spacing:.02em}
a{color:var(--gold-light);text-decoration:none}
::selection{background:var(--gold);color:#08111f}
::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--navy-900)}
::-webkit-scrollbar-thumb{background:var(--steel);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--steel-light)}

/* ---------- Üst Dalga ---------- */
.top-wave{display:block;width:100%;height:130px;margin-bottom:-60px;position:relative;z-index:1;pointer-events:none}

/* ---------- Başlık ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(5,13,26,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{max-width:1180px;margin:auto;display:flex;align-items:center;gap:18px;padding:14px 22px}
.logo{display:flex;align-items:center;gap:11px;cursor:pointer}
.logo-mark{width:42px;height:42px;border-radius:50%;border:2px solid var(--gold);display:grid;place-items:center;font-size:20px;background:radial-gradient(circle at 35% 30%,#1e4066,#0a1628);box-shadow:0 0 14px #d9a63a33}
.logo b{font-family:Georgia,serif;font-size:1.2rem;color:var(--gold-light);letter-spacing:.06em}
.logo small{display:block;font-size:.62rem;color:var(--muted);letter-spacing:.24em;text-transform:uppercase}
.nav-links{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.nav-links button{background:none;border:none;color:var(--muted);font-size:.9rem;padding:9px 14px;border-radius:8px;cursor:pointer;transition:.25s;letter-spacing:.02em}
.nav-links button:hover{color:var(--gold-light);background:#ffffff10}
.nav-links button.active{color:var(--gold-light);background:#d9a63a18;border:1px solid #d9a63a33}
.badge-pro{background:linear-gradient(135deg,var(--gold),#b8860b);color:#0a1628;font-weight:700;font-size:.68rem;padding:3px 9px;border-radius:20px;letter-spacing:.08em}

/* ---------- Genel ---------- */
main{max-width:1180px;margin:auto;padding:0 22px 90px;position:relative;z-index:2}
.view{display:none;animation:fadeUp .5s ease both}
.view.show{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.section-title{font-size:2rem;color:var(--gold-light);margin:26px 0 4px}
.section-sub{color:var(--muted);margin-bottom:28px;max-width:640px}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding:56px 0 30px}
.hero h1{font-size:clamp(2rem,4.5vw,3.2rem);line-height:1.15}
.hero h1 em{color:var(--gold-light);font-style:normal;position:relative}
.hero p{color:var(--muted);margin:18px 0 26px;max-width:540px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;border:none;cursor:pointer;font-size:.95rem;font-weight:600;padding:13px 26px;border-radius:10px;transition:.25s;letter-spacing:.02em}
.btn-gold{background:linear-gradient(135deg,var(--gold),#b8860b);color:#0a1628;box-shadow:0 6px 20px #d9a63a33}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 10px 26px #d9a63a55}
.btn-ghost{background:transparent;color:var(--foam);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--sea);background:#2e8fb815}
.hero-art{position:relative;text-align:center}
.hero-art .ship{font-size:clamp(5rem,9vw,7.5rem);filter:drop-shadow(0 12px 30px #000a);animation:bob 5s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-12px) rotate(2deg)}}
.hero-art .ring{position:absolute;inset:8% 14%;border:1px dashed #d9a63a44;border-radius:50%;animation:spin 40s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:36px 0 0}
.stat{background:linear-gradient(160deg,var(--navy-800),var(--navy-900));border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;transition:.3s}
.stat:hover{transform:translateY(-4px);border-color:#d9a63a55}
.stat b{font-size:1.7rem;color:var(--gold-light);font-family:Georgia,serif;display:block}
.stat span{font-size:.78rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}

/* ---------- Kurs Kartları ---------- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;position:relative;overflow:hidden;transition:.3s;cursor:pointer}
.card:hover{transform:translateY(-5px);border-color:#d9a63a66;box-shadow:0 16px 40px #0008}
.card::before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,var(--sea),var(--gold))}
.card .ico{font-size:2.1rem;margin-bottom:12px;display:block}
.card h3{color:var(--gold-light);font-size:1.2rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.88rem}
.meta{display:flex;gap:14px;margin-top:14px;font-size:.76rem;color:var(--foam);letter-spacing:.05em}
.tag{position:absolute;top:16px;right:16px;font-size:.64rem;padding:3px 10px;border-radius:20px;letter-spacing:.1em;text-transform:uppercase;background:#2e8fb822;color:var(--foam);border:1px solid #2e8fb844}
.tag.done{background:#3ecf8e22;color:var(--ok);border-color:#3ecf8e44}
.progressbar{height:7px;background:#ffffff12;border-radius:5px;margin-top:16px;overflow:hidden}
.progressbar i{display:block;height:100%;background:linear-gradient(90deg,var(--sea),var(--gold));border-radius:5px;transition:width .6s ease}
.lock-note{font-size:.72rem;color:var(--muted);margin-top:8px}

/* ---------- Ders ---------- */
.lesson-layout{display:grid;grid-template-columns:280px 1fr;gap:26px;margin-top:26px}
.side-list{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;height:fit-content;position:sticky;top:86px}
.side-list h4{font-size:.8rem;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;margin:4px 6px 12px}
.l-item{display:flex;gap:10px;align-items:center;width:100%;text-align:left;background:none;border:1px solid transparent;border-radius:10px;padding:11px 12px;color:var(--ink);cursor:pointer;transition:.2s;font-size:.9rem;margin-bottom:4px}
.l-item:hover{background:#ffffff0a}
.l-item.active{background:#d9a63a14;border-color:#d9a63a44}
.l-item.locked{opacity:.45;cursor:not-allowed}
.dot{width:22px;height:22px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:.7rem;background:#ffffff14;border:1px solid var(--line)}
.dot.ok{background:#3ecf8e22;border-color:#3ecf8e66;color:var(--ok)}
.lesson-body{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:34px 38px}
.lesson-body h2{color:var(--gold-light);font-size:1.7rem;margin-bottom:16px}
.lesson-body h3{color:var(--foam);margin:22px 0 8px;font-size:1.1rem}
.lesson-body p,.lesson-body li{color:#cfe0ee;font-size:.95rem}
.lesson-body ul{margin:10px 0 10px 22px}
.lesson-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.88rem}
.lesson-body th{background:#16304f;color:var(--gold-light);padding:10px 12px;text-align:left;border:1px solid var(--line)}
.lesson-body td{padding:9px 12px;border:1px solid var(--line);color:#cfe0ee}
.lesson-body tr:nth-child(even) td{background:#ffffff05}
.callout{border-left:3px solid var(--gold);background:#d9a63a10;padding:14px 18px;border-radius:0 10px 10px 0;margin:18px 0;color:#e8dcb8;font-size:.9rem}
.lesson-nav{display:flex;justify-content:space-between;margin-top:30px;gap:12px;flex-wrap:wrap}

/* ---------- Sınav ---------- */
.exam-shell{max-width:760px;margin:30px auto 0}
.exam-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.timer{font-family:Georgia,serif;font-size:1.3rem;color:var(--gold-light);background:#d9a63a12;border:1px solid #d9a63a44;padding:6px 18px;border-radius:10px}
.q-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 32px;margin-bottom:18px}
.q-num{font-size:.72rem;letter-spacing:.18em;color:var(--sea);text-transform:uppercase;margin-bottom:10px}
.q-text{font-size:1.08rem;margin-bottom:16px;font-weight:600}
.opt{display:flex;gap:12px;align-items:center;width:100%;text-align:left;background:#ffffff06;border:1px solid var(--line);border-radius:10px;padding:12px 15px;margin-bottom:9px;cursor:pointer;transition:.2s;color:#cfe0ee;font-size:.93rem}
.opt:hover{border-color:var(--sea);background:#2e8fb812}
.opt.sel{border-color:var(--gold);background:#d9a63a14;color:#ffe9bd}
.opt.right{border-color:var(--ok);background:#3ecf8e18;color:#bfe9d6}
.opt.wrong{border-color:var(--err);background:#e05c5c18;color:#f3c7c7}
.opt .letter{width:26px;height:26px;border-radius:50%;background:#ffffff10;display:grid;place-items:center;font-size:.75rem;flex:none;font-weight:700}
.result{text-align:center;padding:50px 30px;background:var(--card);border:1px solid var(--line);border-radius:18px}
.score-ring{width:170px;height:170px;margin:0 auto 22px;border-radius:50%;display:grid;place-items:center;font-family:Georgia,serif;font-size:2.3rem;position:relative;background:conic-gradient(var(--gold) 0 100%,#ffffff12 0)}
.score-ring.fail{background:conic-gradient(var(--err) 0 100%,#ffffff12 0)}
.score-ring::after{content:"";position:absolute;inset:11px;border-radius:50%;background:var(--navy-900)}
.score-ring b{position:relative;z-index:1;color:var(--gold-light)}
.score-ring.fail b{color:var(--err)}
.hist{margin:26px auto 0;max-width:760px}
.hist-row{display:flex;justify-content:space-between;background:#ffffff06;border:1px solid var(--line);border-radius:10px;padding:10px 16px;margin-bottom:8px;font-size:.85rem;color:var(--muted)}
.hist-row b{color:var(--gold-light)}

/* ---------- Serbest Çalışma ---------- */
.flash-wrap{max-width:640px;margin:30px auto 0;perspective:1200px}
.flash{cursor:pointer;position:relative;height:250px;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.4,.1,.2,1)}
.flash.flip{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:18px;display:grid;place-items:center;padding:34px;text-align:center;border:1px solid var(--line)}
.face.front{background:linear-gradient(160deg,var(--navy-800),var(--navy-900))}
.face.back{background:linear-gradient(160deg,#16304f,#0f2038);transform:rotateY(180deg);border-color:#d9a63a55}
.face small{display:block;font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--sea);margin-bottom:14px}
.face p{font-size:1.15rem;font-family:Georgia,serif}
.face.back p{color:var(--gold-light)}
.flash-btns{display:flex;justify-content:center;gap:12px;margin-top:24px;flex-wrap:wrap}
.fc-stats{display:flex;justify-content:center;gap:30px;margin-top:20px;font-size:.85rem;color:var(--muted)}
.fc-stats b{color:var(--gold-light)}

/* ---------- Panel ---------- */
.dash{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin-top:26px}
.dash-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.dash-card h4{font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.dash-card b{font-size:1.9rem;font-family:Georgia,serif;color:var(--gold-light)}

footer{border-top:1px solid var(--line);padding:26px;text-align:center;color:var(--muted);font-size:.8rem;position:relative;z-index:2}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(90px);background:linear-gradient(135deg,var(--gold),#b8860b);color:#0a1628;padding:13px 26px;border-radius:12px;font-weight:600;transition:.4s;z-index:99;box-shadow:0 10px 30px #000a}
.toast.show{transform:translateX(-50%) translateY(0)}

@media(max-width:880px){
  .hero{grid-template-columns:1fr;text-align:center}
  .hero p{margin-inline:auto}.cta{justify-content:center}.hero-art{order:-1}
  .stats{grid-template-columns:repeat(2,1fr)}
  .lesson-layout{grid-template-columns:1fr}
  .side-list{position:static}
  .lesson-body{padding:24px 20px}
}

/* ---------- Auth ---------- */
.auth-wrap{max-width:420px;margin:40px auto 0;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px}
.auth-wrap h2{color:var(--gold-light);text-align:center;margin-bottom:6px}
.auth-wrap .sub{text-align:center;color:var(--muted);font-size:.85rem;margin-bottom:22px}
.field{margin-bottom:14px}
.field label{display:block;font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.field input{width:100%;background:#ffffff08;border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:var(--ink);font-size:.95rem;outline:none;transition:.2s}
.field input:focus{border-color:var(--gold);background:#d9a63a08}
.auth-switch{text-align:center;margin-top:18px;font-size:.85rem;color:var(--muted)}
.auth-switch a{cursor:pointer}
.auth-err{background:#e05c5c18;border:1px solid #e05c5c55;color:#f3c7c7;border-radius:10px;padding:10px 14px;font-size:.85rem;margin-bottom:14px;text-align:center}
.user-chip{display:flex;align-items:center;gap:8px;color:var(--foam);font-size:.85rem}
.user-chip .avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--sea),var(--steel));display:grid;place-items:center;font-weight:700;color:#fff}
.logout-btn{background:none;border:1px solid var(--line);color:var(--muted);border-radius:8px;padding:5px 10px;font-size:.75rem;cursor:pointer;transition:.2s}
.logout-btn:hover{border-color:var(--err);color:var(--err)}

/* ---------- Görsel galerisi & admin ---------- */
.img-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:20px 0}
.img-gallery figure{margin:0}
.img-gallery img{width:100%;border-radius:12px;border:1px solid var(--line);transition:.3s;cursor:zoom-in}
.img-gallery img:hover{transform:scale(1.02);border-color:#d9a63a66}
.img-gallery figcaption{font-size:.75rem;color:var(--muted);margin-top:6px}
.admin-panel{background:#d9a63a0d;border:1px dashed #d9a63a55;border-radius:14px;padding:18px;margin-top:24px}
.admin-panel h4{color:var(--gold-light);font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
.admin-panel .row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.admin-panel input[type=file]{color:var(--muted);font-size:.82rem;max-width:260px}
.lightbox{position:fixed;inset:0;background:#000d;display:grid;place-items:center;z-index:200;cursor:zoom-out}
.lightbox img{max-width:92%;max-height:88%;border-radius:12px}