header{position:relative}
.control-bar{position:absolute;top:16px;right:16px;display:flex;align-items:center;gap:12px;z-index:20}
.icon-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid rgba(0,0,0,0.1);background:rgba(255,255,255,0.8);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);cursor:pointer;transition:transform .15s ease,background .2s ease,border-color .2s ease;padding:0;flex:0 0 40px;box-sizing:border-box;aspect-ratio:1/1}
.icon-btn i{font-size:18px;color:#111827}
.icon-btn:hover{transform:translateY(-1px);background:#ffffff;border-color:rgba(0,0,0,0.2)}
.control-bar{background:transparent}
.lang-menu-wrapper{position:relative}
.lang-menu{position:absolute;top:48px;right:0;min-width:220px;background:rgba(255,255,255,0.97);border:1px solid rgba(0,0,0,0.1);border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.15);padding:8px;display:none}
.lang-menu.open{display:block}
.lang-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:8px;cursor:pointer;color:#111827;transition:background .15s ease}
.lang-item:hover{background:rgba(17,24,39,0.06)}
.lang-item .label{font-size:14px}
.lang-item .code{font-size:12px;opacity:.6}
.lang-item.active{background:rgba(17,24,39,0.08);font-weight:600}
.lang-item.active{pointer-events:none;cursor:default}
.icon-btn.dark{background:rgba(31,41,55,0.65);border-color:rgba(255,255,255,0.15)}
.icon-btn.dark i{color:#f9fafb}
body.theme-light{background:linear-gradient(135deg,#eef3f9 0%,#f7fbff 100%);color:#1f2937}
body.theme-light .panel{background:#ffffff;border:1px solid rgba(0,0,0,0.06);box-shadow:0 8px 24px rgba(0,0,0,.08)}
body.theme-light .panel-hint{background:#f5f7fb;color:#4b5563;border-left-color:#22c1b2}
body.theme-light .advanced-settings{background:#f7f9fc;border-left-color:#ff7a59}
body.theme-light textarea{background:#f9fbfe;color:#111827;border-color:rgba(0,0,0,0.08)}
body.theme-light .emoji-display{background:#f9fbfe;color:#111827;border-color:rgba(0,0,0,0.08)}
body.theme-light .icon-btn{background:rgba(255,255,255,0.9);border-color:rgba(0,0,0,0.1)}
body.theme-light .icon-btn.dark i{color:#111827}
body.theme-light .lang-menu{background:#ffffff;border-color:rgba(0,0,0,0.08)}
body.theme-light .lang-item:hover{background:rgba(17,24,39,0.05)}
body.theme-light .lang-item.active{background:rgba(17,24,39,0.08)}
body.theme-light .stats-panel{background:#ffffff;border:1px solid rgba(0,0,0,0.06);border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.08)}
body.theme-light .stats-header{border-bottom:1px solid rgba(0,0,0,0.06);color:#1f2937}
body.theme-light .stats-grid .stat-item{background:#ffffff;border:1px solid rgba(0,0,0,0.06);border-radius:12px}
body.theme-light .stat-value{color:#111827}
body.theme-light .stat-label{color:#4b5563}
body.theme-light .emoji-grid-container{background:#ffffff;border:1px solid rgba(0,0,0,0.06);border-radius:12px;padding:12px}
body.theme-light .emoji-type{background:#ffffff;border:1px solid rgba(0,0,0,0.06);border-radius:8px}
body.theme-light .emoji-type-title{color:#111827}
body.theme-light .emoji-item{background:#ffffff;border:1px solid rgba(0,0,0,0.08);color:#111827}
.top-buttons-spacer{height:40px}

#secretKey{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.1);background:rgba(55,65,85,0.9);color:#fff;outline:none}
body.theme-light #secretKey{background:#f9fbfe;color:#111827;border:1px solid rgba(0,0,0,0.08)}

/* Shared UI elements */
a.logo{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:inherit}
.btn{padding:8px 12px;border:1px solid rgba(255,255,255,0.12);border-radius:8px;background:rgba(255,255,255,0.06);color:#fff;text-decoration:none;display:inline-flex;align-items:center;gap:8px;cursor:pointer}
.btn:hover{background:rgba(255,255,255,0.1)}
body.theme-light .btn{background:#fff;border:1px solid rgba(0,0,0,0.08);color:#111827}
body.theme-light .btn:hover{background:#f7f9fc}

.button-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}
.button-group .encrypt-btn,.button-group .decrypt-btn{padding:10px 12px}
.result-container{display:flex;gap:10px;align-items:flex-start;flex-wrap:wrap}
.copy-btn{flex:0 0 auto}
.lang-menu .code{display:none}
/* Force two-row layout for action toolbar on desktop, responsive wrap */
.button-group.actions{grid-template-columns:repeat(3,minmax(0,1fr)) !important}
@media (max-width:900px){.button-group.actions{grid-template-columns:repeat(3,1fr)}}
@media (max-width:640px){.button-group.actions{grid-template-columns:repeat(2,1fr)}}
#historyPanel button{padding:0 6px;font-size:12px;line-height:1;height:20px;border-radius:6px;flex:0 0 auto;display:inline-flex;align-items:center;white-space:nowrap;gap:6px;background:transparent !important;border:1px solid rgba(255,255,255,0.18) !important;color:#d6e2ff !important;box-shadow:none !important;transform:none !important}
#historyPanel button:hover{background:rgba(255,255,255,0.06) !important}
#historyPanel button i{font-size:12px}
.mini-btn{padding:0 8px;height:22px;font-size:12px;flex:0 0 auto;border:1px solid rgba(255,255,255,0.18);background:transparent;color:#d6e2ff;border-radius:6px;display:inline-flex;align-items:center;gap:6px}
.mini-btn:hover{background:rgba(255,255,255,0.06)}
#qrModal{position:fixed;inset:0;background:rgba(0,0,0,0.6);display:none;align-items:center;justify-content:center;z-index:9999}
#qrBox{background:rgba(35,45,65,0.97);border:1px solid rgba(255,255,255,0.08);padding:16px 16px 10px;border-radius:12px;min-width:260px;text-align:center}
#qrBox h3{margin:0 0 8px;font-size:18px;color:#ffd7c8}
#qrImg{width:220px;height:220px;background:#fff;border-radius:8px;padding:8px}
#qrClose{margin-top:10px}
#clearModal{position:fixed;inset:0;background:rgba(0,0,0,0.6);display:none;align-items:flex-end;justify-content:center;z-index:9999}
#clearSheet{width:100%;max-width:520px;background:rgba(35,45,65,0.97);border:1px solid rgba(255,255,255,0.08);border-bottom:none;border-radius:12px 12px 0 0;padding:14px}
#clearSheet h3{margin:0 0 8px;font-size:17px;color:#ffd7c8}
#clearSheet .row{display:flex;gap:8px;justify-content:flex-end}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:10px}
.modal-actions.center{justify-content:center}
/* Export modal */
#exportModal{position:fixed;inset:0;background:rgba(0,0,0,0.6);display:none;align-items:center;justify-content:center;z-index:9999}
#exportBox{background:rgba(35,45,65,0.97);border:1px solid rgba(255,255,255,0.08);padding:16px;border-radius:12px;min-width:280px;max-width:90vw}
#exportBox h3{margin:0 0 10px;font-size:18px;color:#ffd7c8}
#exportBox label{display:flex;align-items:center;gap:8px;margin:6px 0}
.notification{position:fixed;left:50%;bottom:18px;transform:translate(-50%,20px);background:rgba(255,153,102,0.94);color:#2c3e50;padding:12px 16px;border-radius:10px;font-weight:600;box-shadow:0 8px 24px rgba(0,0,0,0.35);opacity:0;transition:all 0.28s;z-index:1000;max-width:calc(100vw - 24px)}
.notification.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:768px){
  .notification{left:50%;bottom:14px;max-width:92vw;padding:12px 14px;border-radius:12px}
}

:root{--fg:#e6edf3;--muted:#9aa4b2;--panel:rgba(35,45,65,0.95);--border:rgba(255,255,255,0.08);--accent:#ff9966}
.container{max-width:980px;margin:0 auto;padding:20px}
body{margin:0;background:linear-gradient(135deg,#2c3e50 0%,#4a6491 100%);color:var(--fg);font-family:Segoe UI,Arial,sans-serif}
header.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;border-bottom:1px solid var(--border);padding-bottom:12px}
body.theme-light #exportBox{background:#ffffff;border:1px solid rgba(0,0,0,0.08);color:#111827}
body.theme-light #exportBox h3{color:#1f2937}
body.theme-light #exportBox label{color:#111827}

.logo{display:flex;align-items:center;gap:8px;color:inherit;text-decoration:none}
.logo img{width:40px;height:40px;border-radius:9px}
.site-logo{width:48px;height:48px;border-radius:10px;vertical-align:-10px;margin-right:10px;image-rendering:auto}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px;margin:14px 0}
.panel h2{margin:0 0 8px;font-size:18px;color:#ffd7c8;display:flex;align-items:center;gap:8px}
.panel p{margin:6px 0;color:var(--muted);line-height:1.7}
.step{display:flex;gap:12px;align-items:flex-start}
.step .num{width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,0.08);border:1px solid var(--border);display:flex;align-items:center;justify-content:center}
.tip{font-size:13px;color:#cbd5e1}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}
footer.page-footer{margin:18px 0;color:var(--muted);font-size:12px;text-align:center}
@media (max-width:480px){ .grid{grid-template-columns:1fr} }
/* About/Help footer links layout */
.footer-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-start;margin-top:8px}

/* Mobile header/nav adjustments */
@media (max-width:640px){
  header.page-header{flex-direction:column;align-items:flex-start}
  .control-bar{position:static;margin-top:8px;flex-wrap:wrap;gap:8px}
  .container{padding:16px}
  .lang-menu{right:auto;left:0}
}

.footer-line{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}
.footer-actions.inline{margin-top:0}
.icp-link{color:var(--muted);text-decoration:none}
.icp-link:hover{text-decoration:underline}