header { background: var(--bg2); border-bottom: 1px solid var(--border); position: sticky; top: var(--gnav-h, 0px); z-index: 100; }
.nav-top { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; height: 48px; display: flex; align-items: center; gap: 12px; }
.logo { display: flex; align-items: center; font-family: var(--font); font-size: 1rem; font-weight: 700; color: var(--accent); text-decoration: none; letter-spacing: .05em; flex-shrink: 0; }
.logo:hover { opacity: .8; }
.logo-sep { color: var(--border); font-family: var(--font); font-size: .9rem; margin: 0 2px; }
.logo-sub { font-family: var(--font); font-size: .8rem; color: var(--text3); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.theme-btn { background: none; border: 1px solid var(--border); color: var(--text2); width: 32px; height: 32px; border-radius: 6px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s; }
.theme-btn:hover { border-color: var(--accent); color: var(--accent); }

.nav-links a { color: var(--text2); font-size: .8rem; padding: 6px 12px; border-radius: 4px; transition: all .2s; text-decoration: none; font-family: var(--font-ko); position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: var(--accent); border-radius: 1px; transition: width .2s; }
.nav-links a:hover { color: var(--accent); background: rgba(247,147,26,.06); }
.nav-links a.active { color: var(--accent); background: rgba(247,147,26,.08); }
.nav-links a.active::after { width: 60%; }
.content{max-width:860px;margin:0 auto;padding:0 24px 60px;}
.tabs{display:flex;gap:6px;margin-bottom:20px;flex-wrap:wrap;}
.tab{background:var(--bg3);border:1px solid var(--border);color:var(--text2);font-family:var(--font-ko);font-size:.8rem;padding:8px 16px;border-radius:7px;cursor:pointer;transition:all .2s;}
.tab.active{background:var(--accent);border-color:var(--accent);color:#000;font-weight:700;}
.panel-desc{color:var(--text2);font-size:.82rem;font-family:var(--font-ko);margin-bottom:14px;}
.warning-box{background:rgba(248,81,73,.1);border:1px solid rgba(248,81,73,.3);border-radius:7px;padding:10px 14px;color:#f85149;font-size:.78rem;font-family:var(--font-ko);margin-bottom:14px;}
.textarea{resize:vertical;margin-bottom:12px;font-size:.75rem;}
.action-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;}
.btn.danger{background:var(--red);color:#fff;}.btn.danger:hover{background:#c93a2e;}
.result-box{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:16px;font-family:var(--font);font-size:.75rem;line-height:1.8;word-break:break-all;}
.result-ok{color:var(--green);}.result-err{color:var(--red);}
.tx-section{margin-top:14px;}
.tx-section-title{font-size:.68rem;color:var(--text3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;font-family:var(--font-ko);}
.io-row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;padding:6px 0;border-bottom:1px solid var(--border);font-size:.72rem;}
.io-row:last-child{border-bottom:none;}
.io-addr{color:var(--blue);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.io-val{color:var(--accent);flex-shrink:0;}
.search-row{display:flex;gap:10px;margin-bottom:14px;}
.search-row .input{flex:1;}
.fee-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;}
.fee-card{background:var(--bg3);border-radius:7px;padding:14px;text-align:center;}
.fee-val{font-family:var(--font);font-size:1.4rem;font-weight:700;color:var(--accent);}
.fee-sub{font-size:.65rem;color:var(--text3);font-family:var(--font-ko);margin-top:4px;}
.fee-time{font-size:.68rem;color:var(--text2);font-family:var(--font-ko);margin-top:2px;}


.lang-dropdown{position:relative;}
.lang-btn{background:none;border:1px solid var(--border);color:var(--text2);font-family:var(--font);font-size:.72rem;font-weight:700;padding:0 8px;height:32px;border-radius:6px;cursor:pointer;transition:all .2s;letter-spacing:.05em;}
.lang-btn:hover{border-color:var(--accent);color:var(--accent);}
.lang-menu{display:none;position:absolute;top:calc(100% + 6px);right:0;background:var(--bg2);border:1px solid var(--border);border-radius:8px;min-width:100px;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.4);overflow:hidden;}
.lang-menu.open{display:block;}
.lang-menu button{display:block;width:100%;text-align:left;padding:8px 14px;background:none;border:none;color:var(--text2);font-family:var(--font-ko);font-size:.78rem;cursor:pointer;transition:background .15s,color .15s;}
.lang-menu button:hover{background:var(--bg3);color:var(--accent);}

/* Skip link */
.skip-link{position:absolute;top:-40px;left:0;background:var(--accent);color:#fff;padding:8px 16px;z-index:1000;font-size:.8rem;font-family:var(--font-ko);transition:top .2s;text-decoration:none;border-radius:0 0 4px 0}
.skip-link:focus{top:0}

/* Learn links */
.learn-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 14px;background:var(--bg2);border:1px solid var(--border);border-radius:7px;margin:10px auto;max-width:860px;font-size:.78rem}
.learn-links svg{color:var(--text3);flex-shrink:0}
.learn-label{color:var(--text3);font-family:var(--font-ko);white-space:nowrap;margin-right:2px}
.learn-chip{color:var(--text2);text-decoration:none;padding:3px 10px;border:1px solid var(--border);border-radius:4px;font-family:var(--font-ko);font-size:.72rem;transition:all .15s;white-space:nowrap}
.learn-chip:hover{border-color:var(--accent);color:var(--accent)}

/* Appbar */
.appbar{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;padding:12px 20px;border-top:1px solid var(--border);background:var(--bg2);position:fixed;bottom:0;left:0;right:0;z-index:90;backdrop-filter:blur(10px)}
.appbar a{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 12px;border:1px solid var(--border);border-radius:8px;text-decoration:none;color:var(--text2);font-size:.62rem;font-family:var(--font-ko);background:var(--bg3);min-width:56px;transition:all .2s}
.appbar a:hover,.appbar a.active{border-color:var(--accent);color:var(--accent)}
.appbar a svg{flex-shrink:0}
@media(max-width:768px){.appbar{display:none !important;}}

/* Utility classes for CSP compliance (no unsafe-inline) */
.hidden{display:none !important}
.icon-inline{flex-shrink:0;margin-right:6px}
.icon-noshrink{flex-shrink:0}
.icon-section{display:inline;vertical-align:middle}
.auth-mount{position:relative;display:inline-flex}
.fee-section{margin-top:20px}
.text-muted{color:var(--text3)}
.text-accent{color:var(--accent)}
.text-muted-small{color:var(--text3);font-size:.65rem}
.text-muted-extra{color:var(--text3);font-size:.68rem}
.badge-ml{margin-left:8px}
.lookup-grid{margin-top:10px;display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:.72rem}
.fee-retry-msg{color:var(--text3);font-size:.8rem}
.retry-btn{margin-left:8px;padding:2px 8px;font-size:.72rem;cursor:pointer}
.broadcast-link{color:var(--accent)}
.broadcast-txid{margin-top:8px;color:var(--text2)}
.total-output{margin-top:10px;color:var(--accent)}

/* ── 데스크톱/모바일 토글 ── */
.mobile-only { display: none; }
@media (max-width: 768px) {
  .desktop-only { display: none !important; }
  .mobile-only { display: block; }
}

/* ── 햄버거 메뉴 (모바일) ── */
.hamburger-wrap { position: relative; }
.hamburger-panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  min-width: 200px;
  z-index: 300;
  box-shadow: 0 8px 32px rgba(0,0,0,.5);
  overflow: hidden;
}
.hamburger-panel.open { display: block; }
.settings-section { padding: 8px 6px; }
.settings-section--border { border-top: 1px solid var(--border); }
.settings-label { font-size: .68rem; color: var(--text3); font-family: var(--font-ko); padding: 2px 8px 6px; text-transform: uppercase; letter-spacing: .06em; }
.settings-lang-row { display: flex; gap: 4px; padding: 2px 8px 4px; }
.settings-lang-btn { flex: 1; background: var(--bg3); border: 1px solid var(--border); color: var(--text2); font-family: var(--font); font-size: .72rem; padding: 5px 0; border-radius: 5px; cursor: pointer; transition: all .2s; text-align: center; }
.settings-lang-btn:hover, .settings-lang-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(247,147,26,.08); }
.settings-item { display: flex; align-items: center; gap: 9px; width: 100%; background: none; border: none; color: var(--text2); font-family: var(--font-ko); font-size: .78rem; padding: 7px 10px; border-radius: 6px; cursor: pointer; transition: background .15s, color .15s; text-align: left; }
.settings-item:hover { background: var(--bg3); color: var(--accent); }

/* Focus indicator for keyboard navigation (WCAG 2.1 AA) */
:focus-visible{outline:2px solid var(--accent,#f7931a);outline-offset:2px;border-radius:2px}
:focus:not(:focus-visible){outline:none}