/* ============================================================
   kl1k.cc — design system
   light / dark · Inter · indigo→violet gradient
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #f7f8fc;
  --bg2: #ffffff;
  --bg3: #eef0f7;
  --fg: #0e1220;
  --muted: #5c6575;
  --border: #e5e8f0;
  --brand: #4f46e5;
  --brand2: #7c3aed;
  --grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 55%, #a855f7 100%);
  --grad-soft: linear-gradient(135deg, rgba(79,70,229,.12), rgba(168,85,247,.12));
  --ok: #15a34a; --warn: #d97706; --bad: #dc2626;
  --ok-bg: #e9f8ef; --warn-bg: #fdf3e2; --bad-bg: #fdecec;
  --shadow-sm: 0 1px 2px rgba(14,18,32,.06);
  --shadow: 0 1px 2px rgba(14,18,32,.05), 0 10px 32px -14px rgba(14,18,32,.14);
  --shadow-lg: 0 2px 6px rgba(14,18,32,.06), 0 24px 64px -20px rgba(14,18,32,.22);
  --glow: 0 8px 28px -8px rgba(99,79,255,.55);
  --radius: 16px;
  --radius-sm: 10px;
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #0a0d16;
  --bg2: #111522;
  --bg3: #1a1f30;
  --fg: #e8ecf5;
  --muted: #8a92a8;
  --border: #212739;
  --ok-bg: #10291c; --warn-bg: #2a2010; --bad-bg: #2e1418;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.5);
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 36px -16px rgba(0,0,0,.6);
  --shadow-lg: 0 2px 8px rgba(0,0,0,.5), 0 28px 72px -20px rgba(0,0,0,.7);
  --glow: 0 8px 30px -8px rgba(124,90,255,.45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.6 Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  min-height: 100vh;
}
/* ambient background glow */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(48rem 30rem at 82% -10%, rgba(124,58,237,.10), transparent 60%),
    radial-gradient(42rem 26rem at -10% 8%, rgba(79,70,229,.09), transparent 60%);
}
[data-theme="dark"] body::before {
  background:
    radial-gradient(48rem 30rem at 82% -10%, rgba(124,58,237,.16), transparent 60%),
    radial-gradient(42rem 26rem at -10% 8%, rgba(79,70,229,.13), transparent 60%),
    radial-gradient(60rem 40rem at 50% 120%, rgba(56,30,120,.12), transparent 60%);
}

::selection { background: rgba(99,79,255,.28); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 8px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

a { color: var(--brand); text-decoration: none; transition: color .15s; }
a:hover { color: var(--brand2); text-decoration: none; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 22px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 13px; }
.hidden { display: none !important; }
h1, h2, h3 { letter-spacing: -.02em; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
}
.nav-in { display: flex; align-items: center; gap: 8px; height: 62px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 19px; color: var(--fg); letter-spacing: -.03em; }
.logo:hover { text-decoration: none; }
.logo svg { width: 27px; height: 27px; filter: drop-shadow(0 2px 8px rgba(99,79,255,.35)); }
.logo b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.logo span { color: var(--muted); font-weight: 600; }
.nav-links { display: flex; gap: 2px; margin-left: 14px; }
.nav-links a {
  padding: 7px 13px; border-radius: 10px; color: var(--muted); font-weight: 500; font-size: 14px;
  transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--bg3); color: var(--fg); }
.nav-links a.active { color: var(--brand); background: color-mix(in srgb, var(--brand) 10%, transparent); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: 11px; border: 1px solid var(--border); background: var(--bg2); color: var(--muted);
  cursor: pointer; transition: all .15s;
}
.icon-btn:hover { color: var(--brand); border-color: color-mix(in srgb, var(--brand) 40%, var(--border)); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px 18px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--bg2); color: var(--fg); font: inherit; font-weight: 600; font-size: 14px;
  cursor: pointer; transition: all .16s ease; text-decoration: none !important;
  box-shadow: var(--shadow-sm);
}
.btn:hover { border-color: color-mix(in srgb, var(--muted) 50%, var(--border)); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: default; transform: none; box-shadow: none; }
.btn-primary {
  background: var(--grad); background-size: 160% 160%; border: none; color: #fff; box-shadow: var(--glow);
}
.btn-primary:hover { background-position: 100% 50%; filter: brightness(1.07); box-shadow: 0 12px 36px -8px rgba(99,79,255,.65); }
.btn-danger { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, var(--border)); }
.btn-danger:hover { background: var(--bad-bg); border-color: var(--bad); }
.btn-sm { padding: 6px 11px; font-size: 13px; border-radius: 9px; }
.btn-block { width: 100%; padding: 12px 18px; font-size: 15px; }

/* ---------- forms ---------- */
.field { margin-bottom: 15px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 7px; color: var(--muted); }
.input, select, textarea {
  width: 100%; padding: 11px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg2); color: var(--fg);
  font: inherit; outline: none; transition: border-color .15s, box-shadow .15s;
}
.input::placeholder { color: color-mix(in srgb, var(--muted) 75%, transparent); }
.input:focus, textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 13%, transparent);
}
.input-row { display: flex; gap: 8px; }
.input-row .input { flex: 1; }
.hint { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.err, .okmsg {
  padding: 11px 14px; border-radius: 12px; font-size: 14px; margin-bottom: 15px;
  display: flex; align-items: center; gap: 8px;
}
.err { background: var(--bad-bg); color: var(--bad); border: 1px solid color-mix(in srgb, var(--bad) 25%, transparent); }
.okmsg { background: var(--ok-bg); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 25%, transparent); }

/* ---------- cards / layout ---------- */
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); transition: box-shadow .2s, transform .2s, border-color .2s;
}
.card-pad { padding: 24px; }
.card h3 { margin: 0 0 14px; font-size: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.page-head { display: flex; align-items: center; gap: 12px; margin: 28px 0 20px; flex-wrap: wrap; }
.page-head h1 { font-size: 23px; margin: 0; font-weight: 800; }
.page-head .spacer { flex: 1; }
.divider { height: 1px; background: var(--border); margin: 22px 0; }

/* ---------- table ---------- */
.tbl-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .7px; font-weight: 700;
  color: var(--muted); padding: 12px 14px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
.table td { padding: 12px 14px; border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr { transition: background .12s; }
.table tbody tr:hover { background: color-mix(in srgb, var(--bg3) 55%, transparent); }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
th.num { text-align: right; }
th.sortable { cursor: pointer; user-select: none; transition: color .15s; }
th.sortable:hover { color: var(--fg); }
th.sortable .sort-ind { opacity: .45; font-size: 10px; margin-left: 2px; }

/* segmented control */
.seg { display: inline-flex; background: var(--bg3); border: 1px solid var(--border); border-radius: 12px; padding: 3px; gap: 2px; }
.seg-btn {
  border: none; background: transparent; color: var(--muted); font: inherit; font-size: 13.5px;
  font-weight: 600; padding: 7px 15px; border-radius: 9px; cursor: pointer; transition: all .15s;
}
.seg-btn:hover { color: var(--fg); }
.seg-btn.active { background: var(--bg2); color: var(--brand); box-shadow: var(--shadow-sm); }

/* ---------- badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 99px; white-space: nowrap; letter-spacing: .1px;
}
.b-ok { background: var(--ok-bg); color: var(--ok); }
.b-warn { background: var(--warn-bg); color: var(--warn); }
.b-bad { background: var(--bad-bg); color: var(--bad); }
.b-mut { background: var(--bg3); color: var(--muted); }
.b-brand { background: color-mix(in srgb, var(--brand) 12%, transparent); color: var(--brand); }

/* ---------- stat cards ---------- */
.stat { display: flex; flex-direction: column; gap: 5px; padding: 20px 22px; position: relative; overflow: hidden; }
.stat::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--grad); opacity: .8;
}
.stat .v { font-size: 30px; font-weight: 800; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.stat .l { font-size: 13px; color: var(--muted); }

/* ---------- chart ---------- */
.chart { display: flex; align-items: flex-end; gap: 3px; height: 160px; padding: 18px 20px 6px; }
.chart .bar {
  flex: 1; min-width: 4px; border-radius: 5px 5px 2px 2px;
  background: var(--grad); opacity: .8; transition: opacity .15s, transform .15s;
  position: relative; min-height: 2px;
}
.chart .bar:hover { opacity: 1; transform: scaleY(1.02); transform-origin: bottom; }
.chart-x { display: flex; justify-content: space-between; padding: 6px 20px 14px; font-size: 11px; color: var(--muted); }

/* ---------- breakdown bars ---------- */
.br { padding: 6px 0; }
.br-row { display: grid; grid-template-columns: 160px 1fr 56px; align-items: center; gap: 12px; padding: 6px 0; font-size: 13.5px; }
.br-row .lbl { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 500; }
.br-row .track { height: 8px; border-radius: 99px; background: var(--bg3); overflow: hidden; }
.br-row .fill { height: 100%; border-radius: 99px; background: var(--grad); transition: width .4s ease; }
.br-row .cnt { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------- toast ---------- */
#toasts { position: fixed; right: 20px; bottom: 20px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--fg); color: var(--bg); padding: 12px 18px; border-radius: 12px; font-size: 14px; font-weight: 500;
  box-shadow: var(--shadow-lg); animation: tin .22s cubic-bezier(.2,.9,.3,1.2); max-width: 360px;
}
.toast.err { background: var(--bad); color: #fff; }
@keyframes tin { from { transform: translateY(10px) scale(.96); opacity: 0; } }

/* ---------- dialog ---------- */
dialog {
  border: none; border-radius: 20px; background: var(--bg2); color: var(--fg);
  padding: 0; width: min(480px, 92vw); box-shadow: var(--shadow-lg);
  animation: dpop .18s ease;
}
dialog::backdrop { background: rgba(4,7,15,.6); backdrop-filter: blur(4px); }
@keyframes dpop { from { transform: scale(.96) translateY(8px); opacity: 0; } }
.dlg-h { padding: 22px 24px 0; font-size: 18px; font-weight: 700; letter-spacing: -.02em; }
.dlg-b { padding: 16px 24px 4px; }
.dlg-f { display: flex; gap: 8px; justify-content: flex-end; padding: 10px 24px 22px; }

/* ---------- auth ---------- */
.auth { min-height: calc(100vh - 62px); display: flex; align-items: center; justify-content: center; padding: 36px 16px; position: relative; }
.auth::before {
  content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%;
  background: radial-gradient(circle, rgba(99,79,255,.14), transparent 65%);
  filter: blur(40px); pointer-events: none;
}
.auth-card {
  width: 410px; max-width: 100%; padding: 34px; position: relative;
  border-radius: 22px;
}
.auth-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: var(--grad); border-radius: 22px 22px 0 0;
}
.auth-card h1 { margin: 0 0 4px; font-size: 23px; text-align: center; letter-spacing: -.03em; }
.auth-card .sub { text-align: center; color: var(--muted); margin: 0 0 24px; font-size: 14px; }
.auth-alt { text-align: center; margin-top: 18px; font-size: 14px; color: var(--muted); }
.code-input { text-align: center; font-size: 26px; letter-spacing: 12px; font-weight: 700; padding: 13px; }
.auth-brand { display: flex; justify-content: center; margin-bottom: 14px; }
.auth-brand svg { width: 46px; height: 46px; filter: drop-shadow(0 4px 16px rgba(99,79,255,.4)); }
.terms-hint { text-align: center; font-size: 12.5px; color: var(--muted); margin: 16px 0 0; }

/* password wrap + eye */
.pw-wrap { position: relative; }
.pw-wrap .input { padding-right: 46px; }
.pw-eye {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 34px; height: 34px; border: none; background: transparent; color: var(--muted);
  border-radius: 9px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center;
  transition: color .15s;
}
.pw-eye:hover { color: var(--brand); }
.pw-eye svg { width: 17px; height: 17px; }
.pw-eye.shown { color: var(--brand); }

/* password strength */
.strength { display: flex; align-items: center; gap: 5px; margin-top: 8px; }
.strength .s-bar { flex: 1; height: 4px; border-radius: 99px; background: var(--bg3); transition: background .2s; }
.strength .s-bar.on.l1 { background: #ef4444; }
.strength .s-bar.on.l2 { background: #f59e0b; }
.strength .s-bar.on.l3 { background: #84cc16; }
.strength .s-bar.on.l4 { background: #22c55e; }
.strength .s-label { font-size: 11.5px; color: var(--muted); min-width: 44px; text-align: right; text-transform: capitalize; }

/* OTP boxes */
.otp { display: flex; gap: 8px; margin-bottom: 18px; }
.otp .otp-b {
  text-align: center; font-size: 22px; font-weight: 700; padding: 12px 0;
  border-radius: 12px; transition: border-color .15s, box-shadow .15s, transform .1s;
}
.otp .otp-b:focus {
  border-color: var(--brand); transform: translateY(-1px);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 13%, transparent);
}

/* ---------- landing ---------- */
.hero { padding: 88px 0 56px; text-align: center; position: relative; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 99px;
  background: var(--grad-soft); border: 1px solid color-mix(in srgb, var(--brand) 22%, transparent);
  color: var(--brand); font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(38px, 6.4vw, 60px); line-height: 1.08; margin: 0 0 18px;
  font-weight: 800; letter-spacing: -.035em;
}
.hero h1 span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--muted); font-size: 18px; max-width: 580px; margin: 0 auto 32px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-bottom: 64px; flex-wrap: wrap; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding-bottom: 72px; }
.feat { padding: 26px; border-radius: 18px; }
.feat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--brand) 25%, var(--border)); }
.feat .ic {
  width: 44px; height: 44px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  background: var(--grad-soft); border: 1px solid color-mix(in srgb, var(--brand) 18%, transparent);
  color: var(--brand); margin-bottom: 15px;
}
.feat .ic svg { width: 21px; height: 21px; }
.feat h3 { margin: 0 0 7px; font-size: 16px; font-weight: 700; }
.feat p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.demo { max-width: 660px; margin: 0 auto 76px; text-align: left; border-radius: 20px; }
.demo .url-in { display: flex; gap: 8px; }
.footer { border-top: 1px solid var(--border); padding: 30px 0 46px; color: var(--muted); font-size: 14px; }
.footer-in { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.footer-in a { color: var(--muted); }
.footer-in a:hover { color: var(--brand); }

/* ---------- misc ---------- */
.spinner {
  width: 26px; height: 26px; border-radius: 50%;
  border: 3px solid var(--bg3); border-top-color: var(--brand);
  animation: spin .7s linear infinite; margin: 36px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.session-cur { outline: 2px solid color-mix(in srgb, var(--brand) 45%, transparent); outline-offset: -2px; border-radius: 10px; }
.qr-box { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.qr-box canvas, .qr-box img { border-radius: 12px; border: 1px solid var(--border); padding: 8px; background: #fff; }
.qr-box .secret { word-break: break-all; }

@media (max-width: 860px) {
  .grid2, .grid3, .features { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .br-row { grid-template-columns: 108px 1fr 46px; }
  .hero { padding: 56px 0 40px; }
  .demo { margin-bottom: 48px; }
}

/* ---- captcha / qr (auth) ---- */
.cap-row { display: flex; gap: 10px; align-items: center; }
.cap-row img { border-radius: 10px; flex: 0 0 auto; }
.cap-in { flex: 1; min-width: 60px; text-align: center; font-weight: 700; letter-spacing: 1px; }
.qr-wrap { display: flex; justify-content: center; margin: 14px 0 6px; }
.qr-wrap img { border-radius: 14px; background: #fff; padding: 8px; box-shadow: 0 4px 18px rgba(79,70,229,.12); }
.secret-key { font-family: var(--font-mono, ui-monospace, monospace); font-size: 13px; letter-spacing: 1px;
  background: var(--bg-inset, rgba(127,127,127,.12)); border-radius: 10px; padding: 9px 12px; text-align: center;
  user-select: all; word-break: break-all; margin-bottom: 14px; }
.hint.center { text-align: center; }