/* 2FA Code Generator — mobile-first, black + gold */
.tf-section{padding-top:6px}
.tf-section [hidden]{display:none !important}
.tf-section *,.tf-section *::before,.tf-section *::after{box-sizing:border-box}
.tf-head{text-align:center;max-width:680px;margin:0 auto 22px}
.tf-badge{display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:8px;max-width:100%;background:var(--black-soft);border:1px solid var(--gold);color:var(--gold);padding:7px 14px;border-radius:18px;font-size:.74rem;line-height:1.4;margin-bottom:14px}
.tf-title{font-size:clamp(1.6rem,7vw,2.5rem);font-weight:800;line-height:1.2;margin:0 0 8px}
.tf-title span{background:linear-gradient(90deg,var(--gold-light),var(--gold),var(--gold-dark));-webkit-background-clip:text;background-clip:text;color:transparent}
.tf-sub{color:var(--text-muted);font-size:clamp(.84rem,3.6vw,.98rem);line-height:1.6}

.tf-box,.tf-list,.tf-empty{max-width:640px;margin-left:auto;margin-right:auto}
.tf-box{padding:20px;background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft),0 0 60px var(--gold-glow-soft)}
.tf-label{display:block;font-size:.86rem;font-weight:700;margin-bottom:10px}
.tf-label i{color:var(--gold);margin-right:6px}
.tf-label em{font-style:normal;font-weight:400;color:var(--text-faint);font-size:.76rem}
.tf-input{width:100%;min-height:56px;resize:vertical;background:rgba(255,255,255,.04);border:1px solid var(--card-border);border-radius:14px;padding:14px;color:var(--text-light);font-size:max(16px,1rem);line-height:1.5;outline:0;max-height:45vh;transition:var(--transition-fast)}
.tf-input:focus{border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-glow-soft)}
.tf-mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.07em;word-break:break-all}
.tf-err{display:none;margin-top:10px;color:#ff9d9d;background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.35);border-radius:10px;padding:9px 12px;font-size:.82rem;line-height:1.5}
.tf-err.show{display:block}
.tf-tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tf-mini{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;flex:1 1 calc(50% - 8px);padding:8px 14px;background:var(--black-soft);border:1px solid var(--card-border);color:var(--text-light);border-radius:10px;font-family:inherit;font-size:.82rem;cursor:pointer;transition:var(--transition-fast)}
.tf-mini i{color:var(--gold)}
.tf-mini:hover{border-color:var(--gold);color:var(--gold)}
.tf-hint{margin-top:12px;font-size:.76rem;color:var(--text-faint);line-height:1.6}
.tf-hint i{color:var(--gold);margin-right:4px}

.tf-list{display:flex;flex-direction:column;gap:14px;margin-top:18px}
.tf-res{position:relative;text-align:center;background:linear-gradient(145deg,var(--card-bg),var(--black-soft));border:1px solid var(--card-border-hover);border-radius:var(--radius-lg);padding:20px 16px 18px;box-shadow:var(--shadow-gold);animation:tfIn .35s ease}
@keyframes tfIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.tf-lbl{font-size:.8rem;color:var(--text-muted);margin-bottom:6px;word-break:break-all}
.tf-lbl i{color:var(--gold);margin-right:6px}
.tf-code{display:block;width:100%;background:none;border:0;padding:6px 0;cursor:pointer;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:800;font-size:clamp(2rem,11.5vw,3.6rem);letter-spacing:.06em;white-space:nowrap;line-height:1.1;background:linear-gradient(90deg,var(--gold-light),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-tap-highlight-color:transparent}
.tf-code:hover{filter:brightness(1.15)}
.tf-code.flash{animation:tfFlash .5s ease}
@keyframes tfFlash{from{opacity:.2;transform:translateY(8px)}to{opacity:1;transform:none}}
.tf-row{display:flex;align-items:center;justify-content:center;gap:16px;margin:8px 0 14px}
.tf-next{font-size:.8rem;color:var(--text-faint)}
.tf-nx{font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--text-muted)}
.tf-ring{position:relative;width:48px;height:48px}
.tf-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.tf-ring circle{fill:none;stroke-width:3.5}
.tf-ring .bg{stroke:rgba(255,255,255,.08)}
.tf-ring .fg{stroke:var(--gold);stroke-linecap:round;transition:stroke-dashoffset .5s linear,stroke .3s}
.tf-ring span{position:absolute;inset:0;display:grid;place-items:center;font-size:.8rem;font-weight:700}
.tf-res.low .fg{stroke:var(--danger)}
.tf-res.low .tf-ring span{color:var(--danger);animation:tfPulse 1s infinite}
@keyframes tfPulse{50%{opacity:.45}}
.tf-copy{width:100%;min-height:50px;font-size:1rem}
.tf-empty{text-align:center;margin-top:18px;padding:26px 16px;border:2px dashed var(--card-border);border-radius:var(--radius);color:var(--text-muted);font-size:.9rem}
.tf-empty i{font-size:1.8rem;color:var(--gold);margin-bottom:8px}
.tf-toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));max-width:calc(100vw - 32px);text-align:center;transform:translate(-50%,20px);background:var(--gold);color:#111;font-weight:700;font-size:.88rem;padding:11px 20px;border-radius:30px;box-shadow:var(--shadow-gold);opacity:0;pointer-events:none;transition:.25s;z-index:9999}
.tf-toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:600px){.tf-box{padding:28px}.tf-res{padding:26px 24px 22px}.tf-copy{width:auto;min-width:240px}}
@media(prefers-reduced-motion:reduce){.tf-res,.tf-code.flash,.tf-res.low .tf-ring span{animation:none}}

/* ---- Responsive tuning: phone first, then tablet / laptop ---- */
.tf-section{overflow-x:hidden}
.tf-box,.tf-list,.tf-empty,.tf-res{min-width:0;width:100%}
.tf-tools{margin-bottom:0}
.tf-lbl{overflow-wrap:anywhere}
/* small phones (<=380px) */
@media(max-width:380px){
  .tf-box{padding:14px;border-radius:16px}
  .tf-res{padding:16px 10px 14px}
  .tf-badge{font-size:.68rem;padding:6px 10px}
  .tf-label{font-size:.82rem}
  .tf-label em{display:block;margin-top:2px}
  .tf-mini{font-size:.78rem;padding:8px 10px}
  .tf-code{letter-spacing:.03em}
  .tf-row{gap:10px;flex-wrap:wrap}
}
/* tablets and up */
@media(min-width:600px){
  .tf-mini{flex:0 0 auto}
  .tf-tools{gap:10px}
  .tf-input{min-height:72px}
}
/* laptops / desktops: wider box, several keys sit side by side */
@media(min-width:900px){
  .tf-head{margin-bottom:28px}
  .tf-box,.tf-empty{max-width:720px}
  .tf-list{max-width:980px;flex-direction:row;flex-wrap:wrap;justify-content:center}
  .tf-res{flex:0 1 calc(50% - 7px);min-width:320px}
  .tf-copy{width:100%;min-width:0}
}
/* landscape phones: keep the code card compact */
@media(max-height:480px) and (orientation:landscape){
  .tf-code{font-size:clamp(1.8rem,7vw,2.6rem)}
  .tf-res{padding:12px 14px}
}