/* Foundation yakuniy test — asos.
   Ranglar: ohang betaraf, to'yingan rang faqat holat uchun.
   Shriftlar loyiha ichida saqlanadi — imtihon xonasida internet bo'lmasligi mumkin. */

/* ---------- IBM Plex Sans ---------- */
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 400; font-display: block;
  src: url("../fonts/plex-sans-400-latin.b2c9031d9fd6.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 400; font-display: block;
  src: url("../fonts/plex-sans-400-latin-ext.f0e2925b3fa6.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 500; font-display: block;
  src: url("../fonts/plex-sans-500-latin.b2c9031d9fd6.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 500; font-display: block;
  src: url("../fonts/plex-sans-500-latin-ext.f0e2925b3fa6.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 600; font-display: block;
  src: url("../fonts/plex-sans-600-latin.b2c9031d9fd6.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 600; font-display: block;
  src: url("../fonts/plex-sans-600-latin-ext.f0e2925b3fa6.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 700; font-display: block;
  src: url("../fonts/plex-sans-700-latin.b2c9031d9fd6.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Sans"; font-style: normal; font-weight: 700; font-display: block;
  src: url("../fonts/plex-sans-700-latin-ext.f0e2925b3fa6.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------- IBM Plex Mono — faqat raqam va kod uchun ---------- */
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 400; font-display: block;
  src: url("../fonts/plex-mono-400-latin.79936b18df9f.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 400; font-display: block;
  src: url("../fonts/plex-mono-400-latin-ext.8450d5944de2.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 500; font-display: block;
  src: url("../fonts/plex-mono-500-latin.b1c8a895f5fd.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 500; font-display: block;
  src: url("../fonts/plex-mono-500-latin-ext.fa8d8838b94a.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 600; font-display: block;
  src: url("../fonts/plex-mono-600-latin.5a2ce7798732.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 600; font-display: block;
  src: url("../fonts/plex-mono-600-latin-ext.f2fe87d55f72.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 700; font-display: block;
  src: url("../fonts/plex-mono-700-latin.59952787cc62.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plex Mono"; font-style: normal; font-weight: 700; font-display: block;
  src: url("../fonts/plex-mono-700-latin-ext.a10c14592713.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --paper:   #FBFBFA;
  --surface: #FFFFFF;
  --sunk:    #F2F2EF;
  --ink:     #17191C;
  --ink-2:   #3D424A;
  --muted:   #6E737A;
  --line:    #E5E5E2;
  --line-2:  #D2D2CD;

  /* to'yingan rang faqat holat uchun */
  --mark:      #0F5F55;
  --mark-tint: #E9F1EF;
  --flag:      #A8620A;
  --flag-tint: #FAF1E3;
  --stop:      #B3261E;
  --stop-tint: #FBEDEB;

  /* eski nomlar, moslik uchun */
  --bg:     var(--paper);
  --accent: var(--mark);
  --danger: var(--stop);
  --ok:     var(--mark);

  --font-ui:   "Plex Sans", system-ui, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  --font-code: "Plex Mono", "Cascadia Mono", Consolas, "DejaVu Sans Mono", monospace;

  /* radius element o'lchamiga ergashadi */
  --r-cell: 3px;
  --r-ctl:  5px;
  --r-box:  10px;
  --radius: var(--r-ctl);
}

*, *::before, *::after { box-sizing: border-box; }

/* `hidden` atributi har doim kuchli bo'lsin: quyidagi qoidalarning ko'pi
   `display: flex` beradi va bu [hidden] ni bekor qilib qo'yardi. */
[hidden] { display: none !important; }

html { background: var(--paper); }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.centered {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
}

/* ---------- tipografiya ---------- */

h1, h2, h3 {
  line-height: 1.15;
  margin: 0 0 12px;
  font-weight: 600;
  letter-spacing: -0.014em;
}
h1 { font-size: 32px; }
h2 { font-size: 21px; letter-spacing: -0.008em; }
h3 { font-size: 17px; }
p { margin: 0 0 12px; max-width: 68ch; }

a { color: var(--mark); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

.muted { color: var(--muted); }
.small { font-size: 15px; }

/* mono faqat ma'lumot bo'lgan joyda: raqam, kod, taymer */
pre, code, .num { font-family: var(--font-code); font-variant-numeric: tabular-nums; }
pre, code { font-size: 15px; }
code { background: var(--sunk); padding: 0 4px; border-radius: var(--r-cell); }
pre {
  margin: 0 0 18px;
  padding: 14px 16px;
  background: var(--sunk);
  border-radius: var(--r-ctl);
  white-space: pre;
  overflow-x: auto;
  line-height: 1.6;
  font-size: 15px;
  color: var(--ink-2);
}
pre code { background: none; padding: 0; font-size: inherit; }

/* ---------- ustun (eski .card — ramka olib tashlandi) ---------- */

.card {
  background: transparent;
  padding: 0;
  width: 100%;
}
.card-narrow { max-width: 430px; }
.card-title { font-size: 32px; margin: 0 0 10px; }

/* ---------- forma ---------- */

.form-stack { display: flex; flex-direction: column; gap: 18px; margin-top: 28px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field-label { font-weight: 500; font-size: 15px; color: var(--ink-2); }
.field-error { color: var(--stop); font-size: 15px; }

input[type="text"], input[type="number"], input[type="password"], select, textarea {
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--r-ctl);
  padding: 11px 13px;
  width: 100%;
  max-width: 100%;
  transition: border-color 120ms, box-shadow 120ms;
}
input:hover, select:hover, textarea:hover { border-color: var(--muted); }
input::placeholder { color: var(--muted); }

/* 4 xonali kod: maydon aynan to'rt raqamga sig'sin, boshqa emas. */
input[inputmode="numeric"] {
  font-family: var(--font-code);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  padding: 10px 13px;
  width: 7.4em;
  text-align: left;
}

/* ---------- tugmalar ---------- */

.btn {
  font: inherit;
  font-weight: 500;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--r-ctl);
  padding: 10px 18px;
  cursor: pointer;
  line-height: 1.3;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition: background-color 120ms, border-color 120ms, color 120ms;
}
.btn:hover:not(:disabled) { border-color: var(--ink-2); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.btn-primary { background: var(--mark); border-color: var(--mark); color: #fff; }
.btn-primary:hover:not(:disabled) { background: #0B4A42; border-color: #0B4A42; }
.btn-danger { background: var(--stop); border-color: var(--stop); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #8E1E17; border-color: #8E1E17; }
.btn-ok { background: var(--mark); border-color: var(--mark); color: #fff; }

/* "Keyin qaytaman" — kahrabo nuqta, glif emas */
.btn-flag { color: var(--flag); border-color: var(--line-2); }
.btn-flag::before {
  content: "";
  width: 9px; height: 9px;
  border-radius: 2px;
  border: 1.5px solid var(--flag);
  flex: none;
}
.btn-flag:hover:not(:disabled) { border-color: var(--flag); }
.btn-flag.is-on { background: var(--flag); border-color: var(--flag); color: #fff; }
.btn-flag.is-on::before { background: #fff; border-color: #fff; }

.btn-block { width: 100%; }
.btn-lg { font-size: 17px; font-weight: 600; padding: 14px 24px; }
.btn-sm { font-size: 14px; padding: 6px 12px; }

/* ---------- holat: ramka emas, chap chiziq ---------- */

.notice {
  margin: 18px 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--line-2);
  color: var(--ink-2);
  background: none;
  border-radius: 0;
}
.notice > div + div { margin-top: 4px; }
.notice-danger { border-left-color: var(--stop); color: var(--stop); }
.notice-warn   { border-left-color: var(--flag); color: var(--flag); }
.notice-ok     { border-left-color: var(--mark); color: var(--mark); }
.notice-info   { border-left-color: var(--line-2); color: var(--ink-2); }

/* ---------- natija jadvali ---------- */

.stats { display: flex; flex-direction: column; margin: 32px 0; padding: 0; }
.stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 11px 0;
}
.stat:last-child { border-bottom: 1px solid var(--line); }
.stat dt { color: var(--muted); font-size: 15px; }
.stat dd {
  margin: 0;
  font-family: var(--font-code);
  font-weight: 500;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}
.stat-strong { border-top-width: 1px; border-top-color: var(--line-2); }
.stat-strong dt { color: var(--ink); font-weight: 500; }
.stat-strong dd { font-size: 30px; font-weight: 600; color: var(--mark); }
.stat-danger dd { color: var(--stop); }

.auth-switch { margin: 28px 0 0; font-size: 15px; }

.form-lg input[type="text"] { min-height: 46px; padding: 12px 14px; }
.form-lg .btn { min-height: 50px; }

/* ---------- 4 xonali kod: ro'yxatdan o'tgandan keyingi ekranning bosh elementi ---------- */

.code-big {
  font-family: var(--font-code);
  font-size: clamp(56px, 15vw, 84px);
  font-weight: 600;
  letter-spacing: 0.14em;
  margin-right: -0.14em;
  line-height: 1;
  color: var(--ink);
  margin: 20px 0 22px;
  padding: 22px 0;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.code-card .btn { margin-top: 20px; }

/* ---------- fokus ---------- */

:focus-visible { outline: 2px solid var(--mark); outline-offset: 2px; }
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: none;
  border-color: var(--mark);
  box-shadow: 0 0 0 3px var(--mark-tint);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 520px) {
  h1, .card-title { font-size: 27px; }
  body.centered { padding: 32px 18px; }
}

.field-hint { font-size: 14px; color: var(--muted); }