/* Universal Gmail Username Finder - style.css (mobile-first, light/dark) */
:root{
  --bg:#f4f6fb; --bg2:#eaeefb; --card:#ffffff; --text:#0f172a; --muted:#64748b; --line:#e5e9f2;
  --primary:#4f46e5; --primary2:#7c3aed; --primary-ink:#ffffff;
  --ok:#16a34a; --ok-bg:#dcfce7; --bad:#dc2626; --bad-bg:#fee2e2; --wait:#b45309; --wait-bg:#fef3c7; --idle:#475569; --idle-bg:#e2e8f0;
  --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px rgba(15,23,42,.07); --shadow-lg:0 12px 40px rgba(79,70,229,.25);
  --radius:18px; --radius-sm:12px;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0b1020; --bg2:#111833; --card:#151c34; --text:#e8ecf8; --muted:#94a3c4; --line:#242d4d;
  --primary:#818cf8; --primary2:#a78bfa; --primary-ink:#0b1020;
  --ok:#4ade80; --ok-bg:rgba(74,222,128,.14); --bad:#f87171; --bad-bg:rgba(248,113,113,.14); --wait:#fbbf24; --wait-bg:rgba(251,191,36,.14); --idle:#cbd5e1; --idle-bg:rgba(148,163,184,.16);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35); --shadow-lg:0 12px 40px rgba(129,140,248,.25);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans Bengali",Roboto,Arial,sans-serif;line-height:1.55;color:var(--text);background:linear-gradient(160deg,var(--bg),var(--bg2));padding-top:var(--safe-t);padding-bottom:var(--safe-b);transition:background .3s,color .3s}
.wrap{max-width:920px;margin:0 auto;padding:16px 16px 56px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:8px}
[hidden]{display:none!important}

.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0 4px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-logo{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;color:#fff;font-size:20px;background:linear-gradient(135deg,var(--primary),var(--primary2));box-shadow:var(--shadow-lg)}
.theme-toggle{display:inline-flex;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:3px;box-shadow:var(--shadow)}
.theme-toggle button{border:0;background:transparent;color:var(--muted);padding:7px 12px;border-radius:999px;font:inherit;font-size:13px;cursor:pointer;transition:all .2s}
.theme-toggle button[aria-pressed="true"]{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}

.hero{text-align:center;padding:22px 4px 14px}
.hero h1{margin:0 0 8px;font-size:clamp(26px,6vw,40px);line-height:1.15;letter-spacing:-.02em;background:linear-gradient(135deg,var(--primary),var(--primary2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:0 auto;max-width:560px;color:var(--muted)}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-top:16px;transition:background .3s,border-color .3s}
.card h2{margin:0 0 12px;font-size:18px}

.tabs{display:flex;gap:6px;background:var(--bg2);padding:4px;border-radius:14px;margin-bottom:14px}
.tab{flex:1;border:0;background:transparent;color:var(--muted);padding:10px 8px;border-radius:11px;font:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}
.tab[aria-selected="true"]{background:var(--card);color:var(--primary);box-shadow:var(--shadow)}

.field{margin-bottom:12px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.hint{font-size:12px;color:var(--muted);margin-top:5px}
input[type=text],input[type=number],select,textarea{width:100%;font:inherit;font-size:16px;color:var(--text);background:var(--bg);border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;transition:border-color .2s,box-shadow .2s}
textarea{min-height:110px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(99,102,241,.18)}
.row{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:560px){.row{grid-template-columns:repeat(2,1fr)}.row.r3{grid-template-columns:repeat(3,1fr)}}
details.adv{margin:4px 0 12px;border:1px dashed var(--line);border-radius:var(--radius-sm);padding:10px 12px}
details.adv summary{cursor:pointer;font-weight:600;font-size:14px;color:var(--primary)}
details.adv[open] summary{margin-bottom:12px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1.5px solid transparent;border-radius:var(--radius-sm);padding:12px 18px;font:inherit;font-size:15px;font-weight:700;cursor:pointer;min-height:44px;transition:transform .15s,box-shadow .2s,background .2s,opacity .2s;-webkit-tap-highlight-color:transparent}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));box-shadow:var(--shadow-lg)}
.btn-secondary{color:var(--text);background:var(--card);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-ok{color:#fff;background:var(--ok)}
.btn-danger{color:var(--bad);background:var(--bad-bg);border-color:transparent}
.btn-sm{padding:8px 12px;font-size:13px;min-height:38px;border-radius:10px}
.btn-block{width:100%}
.cta{width:100%;padding:18px;font-size:19px;letter-spacing:.04em;border-radius:16px;margin-top:6px}

.alert{display:flex;gap:10px;padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;margin-top:12px;border:1px solid transparent}
.alert-error{background:var(--bad-bg);color:var(--bad)}
.alert-success{background:var(--ok-bg);color:var(--ok)}
.alert-info{background:var(--idle-bg);color:var(--text)}
.invalid-list{margin:6px 0 0;padding-left:18px;font-size:12px;word-break:break-all}

.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(min-width:560px){.stats{grid-template-columns:repeat(5,1fr)}}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;text-align:center}
.stat-num{font-size:26px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}
.stat-label{font-size:12px;color:var(--muted);margin-top:2px}
.stat.s-ok .stat-num{color:var(--ok)} .stat.s-bad .stat-num{color:var(--bad)} .stat.s-wait .stat-num{color:var(--wait)}

.progress-head{display:flex;justify-content:space-between;font-size:14px;font-weight:600;margin:14px 0 6px}
.progress{height:12px;background:var(--idle-bg);border-radius:999px;overflow:hidden}
.progress-bar{height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:width .6s cubic-bezier(.22,1,.36,1)}

.toolbar{display:flex;flex-direction:column;gap:10px;margin-bottom:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1.5px solid var(--line);background:var(--card);color:var(--muted);padding:8px 14px;border-radius:999px;font:inherit;font-size:13px;font-weight:600;cursor:pointer;transition:all .2s}
.chip[aria-pressed="true"]{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}

.list{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:620px){.list{grid-template-columns:repeat(2,1fr)}}
.ucard{display:flex;flex-direction:column;gap:10px;background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow);transition:transform .2s,border-color .2s,box-shadow .2s;animation:pop .35s ease both}
.ucard:hover{transform:translateY(-2px);border-color:var(--primary)}
.ucard.is-selected{border-color:var(--ok);box-shadow:0 0 0 3px var(--ok-bg)}
.uname{font-size:18px;font-weight:700;word-break:break-all}
.badge{display:inline-flex;align-items:center;gap:6px;width:fit-content;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700}
.b-pending{background:var(--wait-bg);color:var(--wait)} .b-available{background:var(--ok-bg);color:var(--ok)} .b-taken{background:var(--bad-bg);color:var(--bad)} .b-unchecked{background:var(--idle-bg);color:var(--idle)}
.actions{display:flex;flex-wrap:wrap;gap:8px}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.selected-panel{border:1.5px solid var(--ok);background:var(--ok-bg);border-radius:var(--radius-sm);padding:14px;margin-top:12px}
.selected-panel h3{margin:0 0 6px;font-size:14px;color:var(--ok)}
.selected-names{font-weight:800;font-size:18px;word-break:break-all;margin-bottom:10px}

.empty{text-align:center;padding:32px 12px;color:var(--muted)}
.empty .big{font-size:42px}
.spinner{width:18px;height:18px;border:3px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.overlay{position:fixed;inset:0;z-index:50;background:rgba(2,6,23,.55);backdrop-filter:blur(4px);display:flex;align-items:flex-end;justify-content:center;padding:0}
@media(min-width:620px){.overlay{align-items:center;padding:20px}}
.modal{width:100%;max-width:480px;background:var(--card);border-radius:24px 24px 0 0;padding:22px 18px calc(22px + var(--safe-b));box-shadow:var(--shadow);animation:rise .3s ease both;max-height:92vh;overflow:auto}
@media(min-width:620px){.modal{border-radius:24px}}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.modal h2{margin:0 0 4px;font-size:20px}
.guide-name{font-size:30px;font-weight:800;text-align:center;margin:14px 0;word-break:break-all;color:var(--primary)}
.guide-steps{margin:0 0 14px;padding-left:20px;color:var(--muted);font-size:14px}
.modal .actions .btn{flex:1 1 45%}

.toast-wrap{position:fixed;left:0;right:0;bottom:calc(18px + var(--safe-b));display:flex;flex-direction:column;align-items:center;gap:8px;z-index:100;pointer-events:none;padding:0 16px}
.toast{background:#0f172a;color:#fff;padding:12px 18px;border-radius:14px;font-size:14px;font-weight:600;box-shadow:0 10px 30px rgba(0,0,0,.35);animation:rise .25s ease both}
.toast.t-error{background:var(--bad);color:#fff}
.toast.t-success{background:#15803d}

.footer{text-align:center;color:var(--muted);font-size:12px;margin-top:28px}
.footer a{color:var(--primary)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* utilities (CSP-safe replacements for inline styles) */
.tc{text-align:center}
.mb10{margin-bottom:10px}
.mb12{margin-bottom:12px}
.mt8{margin-top:8px}
.mt10{margin-top:10px}
.mt12{margin-top:12px}
.p20{padding:20px}

.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:10px}
.check input{width:18px;height:18px;flex:none}