:root {
  --bg: #05060A;
  --card: #0F1014;
  --card-2: #0b0d12;
  --border: #2D2E31;
  --border-strong: #373C69;
  --text: #EEF1F7;
  --muted: #9AA4B8;
  --soft: #CFE8FF;
  --accent: #22D3EE;
  --accent2: #a855f7;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --grad: linear-gradient(100deg, #22d3ee, #a855f7);
}

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

body {
  font-family: 'Vazirmatn', 'Inter', system-ui, -apple-system, 'Segoe UI', Tahoma, Arial, sans-serif;
  background:
    radial-gradient(1100px 520px at 50% -8%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(168, 85, 247, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 28px 16px 64px;
  line-height: 1.6;
}

.wrap { width: 100%; max-width: 580px; }

/* Top bar: brand + language toggle */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 34px; height: 34px; filter: drop-shadow(0 0 14px rgba(34, 211, 238, 0.35)); }
.brand h1 {
  font-size: 20px; font-weight: 800; letter-spacing: 0.3px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.lang { display: flex; gap: 4px; background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang button {
  border: none; background: transparent; color: var(--muted); font: inherit; font-size: 12px;
  padding: 4px 12px; border-radius: 999px; cursor: pointer;
}
.lang button.active { background: var(--grad); color: #05060A; font-weight: 700; }

.tagline { color: var(--muted); font-size: 13.5px; margin: 2px 0 22px; }

.card {
  background: rgba(15, 16, 20, 0.72);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  backdrop-filter: blur(10px);
  margin-bottom: 16px;
}

.isp-badge {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: rgba(34, 211, 238, 0.07);
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 12px; padding: 10px 13px; margin-bottom: 18px; font-size: 13px;
}
.isp-badge .label { color: var(--muted); }
.isp-badge .value { color: var(--accent); font-weight: 700; }
.isp-badge .pool { margin-inline-start: auto; color: var(--soft); font-size: 11px; }

label { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin: 14px 0 6px; }
.hint { font-size: 11.5px; color: var(--muted); margin-top: 6px; line-height: 1.6; }
.hint a { color: var(--accent); text-decoration: none; }
.hint a:hover { text-decoration: underline; }

input[type=text], input[type=password] {
  width: 100%; background: var(--card-2); border: 1px solid var(--border-strong);
  border-radius: 12px; padding: 12px 13px; color: var(--text);
  font-size: 13px; font-family: ui-monospace, 'SF Mono', monospace; outline: none;
}
input::placeholder { color: #4a5163; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12); }

.row { display: flex; gap: 10px; }
.row > * { flex: 1; }

details { margin-top: 14px; }
summary { cursor: pointer; font-size: 12.5px; color: var(--muted); user-select: none; }
summary:hover { color: var(--text); }

button.primary {
  width: 100%; margin-top: 20px; padding: 14px; border: none; border-radius: 12px;
  background: var(--grad); color: #05060A; font-size: 14.5px; font-weight: 800; cursor: pointer;
  font-family: inherit; transition: opacity 0.15s, transform 0.05s;
}
button.primary:hover { opacity: 0.92; }
button.primary:active { transform: translateY(1px); }
button.primary:disabled { opacity: 0.45; cursor: not-allowed; }

.spinner {
  display: inline-block; width: 14px; height: 14px; border: 2px solid rgba(5,6,10,0.35);
  border-top-color: #05060A; border-radius: 50%; animation: spin 0.7s linear infinite; vertical-align: -2px; margin-inline-end: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.banner { border-radius: 12px; padding: 12px 13px; font-size: 12.5px; margin-top: 16px; line-height: 1.6; }
.banner.err { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.3); color: var(--danger); }
.banner.ok { background: rgba(52,211,153,0.1); border: 1px solid rgba(52,211,153,0.3); color: var(--success); }

.result .field { margin-top: 14px; }
.result .sub { display: flex; gap: 8px; align-items: stretch; }
.result .sub input { flex: 1; }
.result .sub button {
  background: var(--card-2); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: 12px; padding: 0 16px; font-size: 12px; cursor: pointer; font-family: inherit;
}
.result .sub button:hover { border-color: var(--accent); color: var(--accent); }

.qr { display: flex; justify-content: center; margin: 18px 0 6px; }
.qr img, .qr canvas { background: white; padding: 10px; border-radius: 12px; }

.apps { display: flex; gap: 10px; margin-top: 14px; }
.apps a {
  flex: 1; text-align: center; text-decoration: none; padding: 11px;
  border: 1px solid var(--border-strong); border-radius: 12px; color: var(--text);
  font-size: 12.5px; font-weight: 600;
}
.apps a:hover { border-color: var(--accent); color: var(--accent); }

.meta { margin-top: 16px; font-size: 11.5px; color: var(--muted); line-height: 1.8; }
.meta code { color: var(--text); background: var(--card-2); padding: 1px 6px; border-radius: 5px; font-size: 11px; }
.meta a { color: var(--accent); text-decoration: none; }

/* Guide */
.guide h2 { font-size: 14px; margin-bottom: 4px; }
.guide .sub2 { color: var(--muted); font-size: 12px; margin-bottom: 14px; }
.steps { list-style: none; counter-reset: step; }
.steps li {
  position: relative; padding-inline-start: 38px; padding-bottom: 16px; font-size: 13px; color: var(--soft);
  border-inline-start: 1px solid var(--border); margin-inline-start: 13px;
}
.steps li:last-child { border-inline-start: 1px solid transparent; padding-bottom: 0; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; inset-inline-start: -13px; top: -2px; width: 26px; height: 26px; border-radius: 50%;
  background: var(--card); border: 1px solid var(--border-strong); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700;
}
.steps li b { color: var(--text); }
.steps code { color: var(--accent); background: var(--card-2); padding: 1px 6px; border-radius: 5px; font-size: 11.5px; font-family: ui-monospace, monospace; }
.steps a { color: var(--accent); text-decoration: none; }

.footnote { text-align: center; color: var(--muted); font-size: 11px; margin-top: 10px; line-height: 1.7; }
.footnote a { color: var(--accent); text-decoration: none; }
.hidden { display: none; }

/* RTL */
html[dir='rtl'] body { font-family: 'Vazirmatn', system-ui, Tahoma, sans-serif; }
html[dir='rtl'] input { font-family: 'Vazirmatn', ui-monospace, monospace; }
html[dir='rtl'] .tagline, html[dir='rtl'] .hint, html[dir='rtl'] .steps li { text-align: right; }