@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700;900&family=JetBrains+Mono:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  /* ── Attack on Titan Official Palette ── */
  --bg:#060608;
  --bg2:#0b0c0f;
  --panel:rgba(10,11,15,.92);
  --border:rgba(200,160,80,.2);
  --gold:#c8a050;           /* Scout Regiment gold */
  --gold-dim:rgba(200,160,80,.14);
  --gold-bright:#e8c070;
  --red:#cc2200;            /* Titan blood red */
  --red-dim:rgba(204,34,0,.18);
  --steel:#8a9bb0;          /* Survey Corps steel blue-grey */
  --steel-dim:rgba(138,155,176,.15);
  --cream:#d4c9b0;          /* aged parchment text */
  --text:#e8ddc8;
  --dim:#7a7060;
  --faint:#3a3428;
  --disp:'Cinzel',serif;
  --mono:'JetBrains Mono',monospace;
  --body:'Inter',system-ui,sans-serif;
  --glow:#c8a050;
  --glow-soft:rgba(200,160,80,.4);
  --line:rgba(200,160,80,.32);
  --line-soft:rgba(200,160,80,.16);
}

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

html,body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--body);
  height:100%;
  -webkit-font-smoothing:antialiased;
}

body{position:relative; overflow:hidden;}

body[data-page="cards"],
body[data-page="tutorial"],
body[data-page="home"],
body[data-page="credits"]{
  overflow-y:auto; overflow-x:hidden; -webkit-overflow-scrolling:touch;
}

body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(200,160,80,.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 100% 100%, rgba(204,34,0,.06) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 80%, rgba(138,155,176,.05) 0%, transparent 55%);
}

/* ───── fixed per-page backdrop ───── */
#page-bg{
  position:fixed; top:0; right:0; bottom:0; left:0; width:100%; height:100%;
  z-index:0; pointer-events:none;
  background-color:#060608;
  background-size:cover; background-position:center top; background-repeat:no-repeat;
  transition:background-image .6s ease;
}
#page-bg::after{
  content:''; position:absolute; top:0; right:0; bottom:0; left:0;
  background:linear-gradient(180deg, rgba(6,6,8,.72) 0%, rgba(6,6,8,.85) 45%, rgba(6,6,8,.97) 100%);
}
body[data-page="home"]     #page-bg{ background-image:url('/img/bg-home.jpg'); }
body[data-page="tutorial"] #page-bg{ background-image:url('/img/bg-deploy.jpg'); }
body[data-page="credits"]  #page-bg{ background-image:url('/img/bg-credits.jpg'); }
body[data-page="cards"]    #page-bg{ background-image:url('/img/bg-cards.jpg'); }

/* ── Wings of Freedom watermark overlay ── */
body::after{
  content:'⚔';
  position:fixed; bottom:-10%; right:-5%;
  font-size:clamp(200px,40vw,380px);
  color:rgba(200,160,80,.025);
  pointer-events:none; z-index:1;
  line-height:1;
}

/* ───── hamburger + drawer ───── */
#hamburger{
  position:fixed; top:16px; left:16px; z-index:50;
  width:44px; height:44px; border-radius:8px;
  background:rgba(10,11,15,.92); border:1px solid var(--border);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:5px;
  backdrop-filter:blur(10px);
}
#hamburger span{width:20px;height:2px;background:var(--gold);border-radius:1px;}

#adminLink{
  position:fixed; top:16px; right:16px; z-index:50;
  width:44px; height:44px; border-radius:8px;
  background:rgba(10,11,15,.92); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  color:var(--dim); backdrop-filter:blur(10px); text-decoration:none;
}

#drawer-overlay{
  position:fixed; inset:0; z-index:60; background:rgba(2,2,4,.75); backdrop-filter:blur(3px);
  opacity:0; pointer-events:none; transition:opacity .25s;
}
#drawer-overlay.show{opacity:1; pointer-events:auto;}

#drawer{
  position:fixed; top:0; left:0; bottom:0; z-index:70;
  width:80%; max-width:320px;
  background:var(--bg2); border-right:1px solid var(--border);
  transform:translateX(-100%); transition:transform .3s cubic-bezier(.4,0,.2,1);
  display:flex; flex-direction:column;
}
#drawer.open{transform:translateX(0);}

.drawer-header{
  padding:24px 20px 18px; display:flex; align-items:center; justify-content:space-between;
  border-bottom:1px solid var(--border);
  background:linear-gradient(135deg, rgba(200,160,80,.06), transparent);
}
.drawer-logo{
  font-family:var(--disp); font-weight:700; letter-spacing:.18em;
  color:var(--gold); font-size:16px;
  text-shadow:0 0 20px rgba(200,160,80,.5);
}
#drawer-close{background:none;border:none;color:var(--dim);font-size:20px;}

.drawer-nav{padding:18px 14px; overflow-y:auto;}
.drawer-section-label{
  font-size:10px; font-weight:700; letter-spacing:.18em;
  color:var(--faint); padding:14px 10px 10px;
  font-family:var(--mono); text-transform:uppercase;
}
.nav-btn{
  width:100%; display:block; text-align:left;
  background:none; border:none; text-decoration:none;
  color:var(--text); padding:13px 12px; border-radius:6px;
  font-size:14px; font-weight:600; font-family:var(--body);
  letter-spacing:.03em;
}
.nav-btn.active{background:var(--gold-dim); color:var(--gold-bright);}
.drawer-divider{height:1px; background:var(--border); margin:12px 6px;}

/* ───── pages ───── */
main{position:relative; z-index:2;}
.page{display:none;}
.page.active{display:flex; flex-direction:column;}

.page[data-page="home"].active,
.page[data-page="credits"].active{ min-height:100vh; }
.page[data-page="cards"]{ min-height:100vh; }
.page[data-page="tutorial"]{ min-height:100vh; }

.page-content{
  max-width:460px; margin:0 auto; width:100%;
  padding:clamp(56px,12vh,84px) 20px clamp(40px,6vh,60px);
  flex:1; display:flex; flex-direction:column;
}

/* ── Brand row ── */
.brand-row{display:flex; align-items:center; gap:12px; margin-bottom:clamp(14px,4vh,30px);}
.brand-mark{
  width:38px;height:38px;border-radius:6px;
  background:linear-gradient(135deg, #8a3a00, #5a2000);
  border:1px solid rgba(200,160,80,.4);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono); font-weight:700; color:var(--gold); font-size:16px;
  box-shadow:0 0 18px -4px rgba(200,160,80,.35);
}
.brand-word{
  font-family:var(--disp); font-weight:700; font-size:13px;
  letter-spacing:.22em; color:var(--text); text-transform:uppercase;
}

h1.page-title{
  font-family:var(--disp);
  font-size:clamp(24px,6vh,36px); font-weight:700; letter-spacing:.04em; line-height:1.1;
  margin-bottom:clamp(6px,1.6vh,12px);
  text-shadow:0 0 30px rgba(200,160,80,.2);
}
h1.page-title span{color:var(--gold);}
.page-sub{
  color:var(--dim); font-size:clamp(13px,2.2vh,15px); line-height:1.6;
  margin-bottom:clamp(14px,4vh,28px); max-width:38ch;
  font-family:var(--body);
}

/* ───── card ───── */
.card{
  background:var(--panel); border:1px solid var(--border); border-radius:10px;
  padding:clamp(14px,3vh,22px) 20px clamp(16px,3.2vh,24px); margin-bottom:16px;
  position:relative; overflow:hidden;
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:.7;
}
.card h2{
  font-family:var(--disp); font-size:17px; font-weight:700;
  margin-bottom:6px; letter-spacing:.05em; color:var(--cream);
}
.card .note{color:var(--dim); font-size:13.5px; margin-bottom:clamp(10px,2.2vh,18px);}

.field{margin-bottom:clamp(10px,2vh,16px);}
.field label{
  display:block; font-size:11px; font-weight:700;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--dim); margin-bottom:8px; font-family:var(--mono);
}
.field input{
  width:100%; background:rgba(4,4,6,.95); border:1px solid var(--border); border-radius:6px;
  padding:clamp(11px,2.2vh,15px) 16px; color:var(--text); font-family:var(--mono); font-size:15px;
}
.field input:focus{
  outline:none; border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(200,160,80,.15);
}

.btn{
  width:100%; padding:clamp(12px,2.6vh,16px); border:none; border-radius:6px;
  background:linear-gradient(135deg, #8a3a00, #5a2800);
  border:1px solid rgba(200,160,80,.35);
  color:var(--gold-bright); font-family:var(--disp); font-weight:700; font-size:15px;
  letter-spacing:.08em;
  box-shadow:0 4px 20px -6px rgba(200,80,0,.5);
  transition:all .2s;
}
.btn:hover{
  background:linear-gradient(135deg, #a04800, #6a3200);
  box-shadow:0 6px 24px -4px rgba(200,100,0,.6);
}

/* result / pairing reveal */
.result{margin-top:clamp(10px,2.4vh,22px); display:none;}
.result.show{display:block;}
.result-label{
  font-size:10px; font-weight:700; letter-spacing:.14em; text-transform:uppercase;
  color:var(--dim); margin-bottom:9px; font-family:var(--mono);
}
.code-row{display:flex; gap:8px;}
.code-box{
  flex:1; background:rgba(4,4,6,.95); border:1px solid var(--border); border-radius:6px;
  padding:clamp(12px,2.4vh,17px) 18px; font-family:var(--mono); font-size:22px; font-weight:700;
  letter-spacing:.14em; color:var(--gold); display:flex; align-items:center; min-height:56px;
}
.code-box.glow{
  box-shadow:0 0 0 1px rgba(200,160,80,.2), 0 0 24px -6px rgba(200,160,80,.35);
  border-color:rgba(200,160,80,.38);
}
.copy-btn{
  background:rgba(10,11,15,.9); border:1px solid var(--border); color:var(--dim);
  border-radius:6px; padding:0 18px; font-family:var(--body); font-weight:700; font-size:13px;
}
.session-note{margin-top:12px; color:var(--dim); font-size:13px; line-height:1.6;}

/* ── footer ── */
.site-footer{
  border-top:1px solid var(--border);
  background:var(--bg2);
  padding:32px 20px 24px;
  margin-top:auto;
  text-align:center;
}
.site-footer .footer-brand{
  font-family:var(--disp); font-weight:700; font-size:18px;
  color:var(--gold); letter-spacing:.14em; margin-bottom:4px;
  text-shadow:0 0 16px rgba(200,160,80,.35);
}
.site-footer .footer-tagline{font-size:12px; color:var(--faint); margin-bottom:18px; letter-spacing:.04em;}
.site-footer .footer-links{
  display:flex; flex-wrap:wrap; justify-content:center; gap:6px 20px; margin-bottom:18px;
}
.site-footer .footer-links a{color:var(--dim); font-size:13px; font-weight:600; text-decoration:none;}
.site-footer .footer-links a:hover{color:var(--gold);}
.site-footer .footer-copy{font-size:11px; color:var(--faint); font-weight:600;}
.site-footer .footer-copy a{color:var(--gold); text-decoration:none; font-weight:700;}

/* credits */
.credit-card{padding:clamp(14px,2.8vh,22px) 20px clamp(14px,2.8vh,24px); margin-bottom:clamp(8px,2vh,16px);}
.credit-card h2{font-size:17px; font-family:var(--disp); letter-spacing:.06em;}
.credit-card .role{color:var(--gold); font-size:12px; font-weight:700; margin-bottom:6px; letter-spacing:.06em;}
.credit-card p{color:var(--dim); font-size:14px; line-height:1.6;}
.credit-card a.dev{color:var(--gold); font-weight:700; text-decoration:none;}

/* ─── Tutorial page ─── */
.tutorial-page{min-height:100vh; padding:84px 20px 40px; position:relative;}
.tutorial-header{text-align:center; margin-bottom:36px;}
.tutorial-eyebrow{
  font-size:10px; font-weight:700; letter-spacing:.35em; color:var(--gold);
  text-transform:uppercase; margin-bottom:10px; font-family:var(--mono);
}
.tutorial-title{
  font-family:var(--disp);
  font-size:clamp(28px,7vw,46px); font-weight:900; color:var(--cream);
  text-shadow:0 0 30px rgba(200,160,80,.3); margin-bottom:10px; letter-spacing:.08em;
}
.tutorial-sub{font-size:14px; color:var(--dim); max-width:34ch; margin:0 auto; line-height:1.6;}

.tut-card{
  background:var(--panel); border:1px solid var(--border); border-radius:10px;
  padding:22px 20px; margin-bottom:18px; position:relative; overflow:hidden;
  max-width:520px; margin-left:auto; margin-right:auto;
}
.tut-card::before{
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg, transparent, var(--gold), transparent); opacity:.7;
}
.tut-card-top{display:flex; align-items:center; justify-content:space-between; margin-bottom:10px;}
.tut-icon{font-size:22px; color:var(--gold);}
.tut-badge{
  font-size:9px; font-weight:700; letter-spacing:.12em; padding:4px 10px;
  border-radius:4px; background:rgba(200,160,80,.12); color:var(--gold);
  border:1px solid rgba(200,160,80,.3); font-family:var(--mono);
}
.tut-card h3{
  font-family:var(--disp); font-size:16px; font-weight:700;
  margin-bottom:6px; letter-spacing:.04em; color:var(--cream);
}
.tut-card p{font-size:13.5px; color:var(--dim); line-height:1.6; margin-bottom:14px;}
.tut-btn{
  display:flex; align-items:center; justify-content:center; gap:10px;
  width:100%; padding:13px; border-radius:6px; border:none; text-decoration:none;
  background:linear-gradient(135deg, #8a3a00, #5a2800);
  border:1px solid rgba(200,160,80,.3);
  color:var(--gold-bright); font-family:var(--disp); font-weight:700; font-size:13px;
  letter-spacing:.06em;
  box-shadow:0 4px 16px -4px rgba(200,80,0,.4);
}
.tut-btn svg{flex-shrink:0;}
.tut-btn-mf{
  background:linear-gradient(135deg, #12305a, #0d2040);
  border-color:rgba(138,155,176,.3);
  color:var(--steel); box-shadow:0 4px 16px -4px rgba(18,48,90,.5);
}
.tut-divider{
  display:flex; align-items:center; gap:12px; margin:8px auto 8px;
  max-width:520px; color:var(--faint); font-size:10px; font-weight:700;
  letter-spacing:.16em; font-family:var(--mono);
}
.tut-divider::before,.tut-divider::after{content:''; flex:1; height:1px; background:var(--border);}

/* Scan line ambiance */
@keyframes scanLine{
  0%  {transform:translateY(-100%);opacity:.04;}
  100%{transform:translateY(100vh);opacity:.02;}
}
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(20px);}
  to  {opacity:1;transform:translateY(0);}
}

/* Scrollbar — AOT gold style */
::-webkit-scrollbar{width:5px;}
::-webkit-scrollbar-track{background:#04040a;}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#5a2800,#8a4a10);border-radius:6px;}
::-webkit-scrollbar-thumb:hover{background:var(--gold);}

/* gen error */
.gen-error{color:#ff6a54;font-size:13px;margin-top:12px;}