/* ===========================================================================
   StrX CTF — design system
   Dark-first, modern platform aesthetic. RTL-aware via CSS logical properties.
   Self-hosted fonts (no external origins; CSP stays strict).
   =========================================================================== */

/* Inter — UI/body (latin + latin-ext) */
@font-face {
  font-family: 'Inter'; font-style: normal; font-weight: 100 900; font-display: swap;
  src: url('/static/fonts/inter-latin.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+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'Inter'; font-style: normal; font-weight: 100 900; font-display: swap;
  src: url('/static/fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02AF,U+0300-0301,U+0303,U+0305-0307,U+0309-036F,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20CF,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
/* Space Grotesk — display/headings */
@font-face {
  font-family: 'Space Grotesk'; font-style: normal; font-weight: 300 700; font-display: swap;
  src: url('/static/fonts/grotesk-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2212,U+2215,U+FEFF,U+FFFD;
}
/* JetBrains Mono — code/numerals */
@font-face {
  font-family: 'JetBrains Mono'; font-style: normal; font-weight: 100 800; font-display: swap;
  src: url('/static/fonts/mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+2000-206F,U+2074,U+20AC,U+2122,U+2212,U+FEFF,U+FFFD;
}
/* Cairo — Arabic (and its latin for brand lockups) */
@font-face {
  font-family: 'Cairo'; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url('/static/fonts/cairo-arabic.woff2') format('woff2');
  unicode-range: U+0600-06FF,U+0750-077F,U+0870-088E,U+0890-0891,U+0898-08E1,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FEFF;
}
@font-face {
  font-family: 'Cairo'; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url('/static/fonts/cairo-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2212,U+2215,U+FEFF,U+FFFD;
}

:root {
  /* Palette — tokens, redefinable per theme */
  --bg:            #08090c;
  --bg-elev:       #0f1115;
  --bg-elev-2:     #16181e;
  --surface:       #0f1115;
  --surface-2:     #121419;
  --surface-brd:   rgba(255, 255, 255, 0.07);
  --surface-brd-2: rgba(255, 255, 255, 0.12);
  --ink:           #f2f4f8;
  --ink-dim:       #a7afbe;
  --ink-faint:     #6b7382;
  --accent:        #2ee6a6;   /* primary — refined emerald/mint */
  --accent-2:      #5b9cff;   /* secondary — cool blue */
  --accent-3:      #ff6b8b;   /* alert / first-blood */
  --accent-amber:  #f5c249;
  --glow:          0 0 0 1px rgba(46,230,166,.22), 0 10px 30px -10px rgba(46,230,166,.30);
  --radius:        12px;
  --radius-sm:     8px;
  --radius-lg:     18px;
  --shadow:        0 1px 2px rgba(0,0,0,.4), 0 12px 32px -16px rgba(0,0,0,.6);
  --display: 'Space Grotesk', 'Cairo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Cairo', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --sans: 'Inter', 'Cairo', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;

  --ok:   #2ee6a6;
  --err:  #ff6b8b;
  --info: #5b9cff;
}

/* Arabic: Cairo leads for a cohesive RTL type system */
:root[dir="rtl"], [dir="rtl"] {
  --display: 'Cairo', 'Space Grotesk', system-ui, sans-serif;
  --sans: 'Cairo', 'Inter', system-ui, sans-serif;
}

/* Difficulty accents */
:root {
  --diff-easy:   #35f0b8;
  --diff-medium: #4db5ff;
  --diff-hard:   #ffc857;
  --diff-insane: #ff5c8a;
}

/* Light theme fallback for users who prefer it. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:            #f6f8fb;
    --bg-elev:       #ffffff;
    --bg-elev-2:     #eef2f7;
    --surface:       #ffffff;
    --surface-2:     #f3f6fa;
    --surface-brd:   rgba(10, 30, 60, 0.09);
    --surface-brd-2: rgba(10, 30, 60, 0.16);
    --ink:           #0c1420;
    --ink-dim:       #45566b;
    --ink-faint:     #7a8699;
    --accent:        #0ca678;
    --accent-2:      #2f6fe0;
    --shadow:        0 1px 2px rgba(20,40,80,.06), 0 14px 32px -18px rgba(20,40,80,.22);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  isolation: isolate;
}

/* Keep the site background quiet; the city image appears inside the home panel. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: transparent;
  pointer-events: none;
}

/* Soft ambient glow backdrop — no grid lines, clean and modern */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(70% 55% at 50% -10%, rgba(46,230,166,.07), transparent 70%),
    radial-gradient(50% 40% at 85% 0%, rgba(91,156,255,.08), transparent 65%);
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip-link {
  position: fixed;
  z-index: 1000;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  padding: 9px 14px;
  transform: translateY(-160%);
  border: 1px solid var(--surface-brd-2);
  border-radius: 9px;
  background: var(--bg-elev);
  color: var(--ink);
  transition: transform .16s ease;
}
.skip-link:focus { transform: translateY(0); }

.container { width: 100%; max-width: 1180px; min-width: 0; margin-inline: auto; padding-inline: 20px; }

/* ----------------------------- Header / nav ----------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(1.3);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-block-end: 1px solid var(--surface-brd);
  box-shadow: 0 1px 0 rgba(255,255,255,.02), 0 8px 24px -16px rgba(0,0,0,.6);
}
.event-ticker {
  overflow: hidden;
  border-block-end: 1px solid var(--surface-brd);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-elev));
  color: var(--ink-dim);
  white-space: nowrap;
}
.event-ticker-track {
  display: flex;
  width: max-content;
  animation: event-ticker-scroll 42s linear infinite;
}
.event-ticker:hover .event-ticker-track,
.event-ticker:focus-within .event-ticker-track { animation-play-state: paused; }
.event-ticker-copy {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  min-height: 38px;
  padding-inline: 2.5rem;
}
.event-ticker-copy strong { color: var(--ink); }
.event-ticker-dot { inline-size: 7px; block-size: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 45%, transparent); }
@keyframes event-ticker-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .event-ticker-track { animation: none; width: auto; } .event-ticker-copy[aria-hidden="true"] { display: none; } }
.nav {
  display: flex; align-items: center; gap: 8px;
  height: 70px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--display); font-weight: 700; letter-spacing: -.01em;
  font-size: 1.2rem; color: var(--ink);
  margin-inline-end: 8px;
}
.brand:hover { text-decoration: none; }
.brand .logo {
  inline-size: 34px; block-size: 34px;
  display: grid; place-items: center;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,.4));
}
.owl { inline-size: 100%; block-size: 100%; display: block; }
.svg-defs { position: absolute; inline-size: 0; block-size: 0; overflow: hidden; }
.brand .wm { font-weight: 700; }
.brand .wm b { color: var(--accent); font-weight: 700; }
.brand .wm .suffix { color: var(--ink-faint); font-weight: 600; font-size: .78em; letter-spacing: .14em; margin-inline-start: 3px; }
.nav-links { display: flex; gap: 2px; align-items: center; margin-inline-start: auto; flex-wrap: wrap; }
.nav-link {
  position: relative;
  color: var(--ink-dim); padding: 8px 13px; border-radius: 9px;
  font-size: .92rem; font-weight: 500; white-space: nowrap;
  transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--ink); background: var(--bg-elev-2); text-decoration: none; }
.nav-link.active { color: var(--ink); background: var(--bg-elev-2); }
.nav-link.active::after {
  content: ""; position: absolute; inset-inline: 13px; inset-block-end: 2px;
  block-size: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.nav-sep { inline-size: 1px; block-size: 22px; background: var(--surface-brd-2); margin-inline: 6px; }

.nav-user { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-dim); font-size: .9rem; }
.nav-user .uname { color: var(--ink); font-weight: 600; font-family: var(--mono); }

/* Buttons */
.nav { display:grid; grid-template-columns:auto 1fr auto; gap:24px; height:auto; min-height:80px; padding-block:12px; }
.nav-links { justify-content:center; margin:0; flex-wrap:nowrap; padding:4px; border:1px solid var(--surface-brd); background:var(--bg-elev); border-radius:14px; justify-self:center; }
.nav-actions { display:flex; align-items:center; gap:12px; }
.language-switch { display:flex; padding:3px; gap:2px; border:1px solid var(--surface-brd-2); border-radius:10px; }
.language-option { border:0; background:transparent; color:var(--ink-dim); font:inherit; font-size:.78rem; padding:6px 8px; cursor:pointer; border-radius:7px; }
.language-option.selected { background:var(--bg-elev-2); color:var(--accent); }
.account-menu { position:relative; }
.account-menu summary { display:flex; align-items:center; gap:8px; cursor:pointer; list-style:none; font-size:.85rem; }
.account-menu summary::-webkit-details-marker { display:none; }
.account-avatar { display:grid; place-items:center; inline-size:32px; block-size:32px; border:1px solid var(--accent); border-radius:50%; color:var(--accent); }
.account-panel { position:absolute; inset-inline-end:0; top:48px; min-inline-size:200px; padding:12px; display:grid; gap:6px; background:var(--bg-elev); border:1px solid var(--surface-brd-2); border-radius:14px; box-shadow:var(--shadow); }
@media(max-width:1050px) { .nav { gap:12px; } .nav-link { padding-inline:10px; } .brand { font-size:1rem; } .nav-actions { gap:6px; } }
@media(max-width:800px) { .nav { grid-template-columns:1fr auto; } .nav-links { grid-row:2; grid-column:1 / -1; inline-size:100%; justify-content:space-evenly; } .nav-actions { justify-self:end; } }
@media(max-width:420px) { .nav { padding-inline:12px; } .brand .suffix { display:none; } .nav-actions .btn { padding-inline:8px; font-size:.75rem; } .language-option { padding-inline:5px; } .nav-link { font-size:.8rem; padding-inline:7px; } }
.modal-result.ok, .modal-result.fb { color:var(--ok); background:color-mix(in srgb,var(--ok) 10%,transparent); border:1px solid color-mix(in srgb,var(--ok) 35%,transparent); padding:12px; border-radius:10px; }
.dashboard-search { max-inline-size:440px; margin-block-end:18px; }
.quick-flag { display:flex; gap:8px; margin-block-start:16px; }
.quick-flag .input { min-inline-size:0; padding:8px; font-family:var(--mono); }
.quick-result { min-block-size:24px; font-size:.8rem; margin-block-start:8px; }
.quick-result.ok { color:var(--ok); } .quick-result.err { color:var(--err); }
.chal-open { border:0; padding:0; background:none; color:inherit; text-align:start; font:inherit; cursor:pointer; inline-size:100%; }
.chal-files { display:flex; gap:8px; flex-wrap:wrap; margin-block-start:12px; font-size:.8rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; cursor: pointer;
  padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--surface-brd-2);
  background: var(--bg-elev-2); color: var(--ink);
  transition: transform .12s ease, box-shadow .2s, border-color .2s, background .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: var(--accent); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04120d; border: none; box-shadow: var(--glow);
}
.btn-primary:hover { box-shadow: 0 0 0 1px rgba(53,240,184,.4), 0 10px 30px -8px rgba(53,240,184,.6); }
.btn-ghost { background: transparent; }
.btn-danger { border-color: color-mix(in srgb, var(--accent-3) 50%, transparent); color: var(--accent-3); }
.btn-danger:hover { border-color: var(--accent-3); background: color-mix(in srgb, var(--accent-3) 12%, transparent); }
.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: 8px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }

.icon-btn {
  display: inline-grid; place-items: center;
  inline-size: 38px; block-size: 38px; border-radius: 10px;
  border: 1px solid var(--surface-brd-2); background: var(--bg-elev-2);
  color: var(--ink-dim); cursor: pointer; font: inherit;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ------------------------------- Main ----------------------------------- */
main { flex: 1 0 auto; min-width: 0; padding-block: 36px 64px; }
.page-head { margin-block-end: 28px; }
.page-head h1 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3vw, 2.4rem); margin: 0 0 6px;
  font-weight: 600; letter-spacing: -.02em;
}
.page-head p { color: var(--ink-dim); margin: 0; }
.eyebrow {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .22em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 10px;
}

/* Cards / surfaces */
.card {
  background: var(--surface);
  border: 1px solid var(--surface-brd);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}
.card-pad { padding: 22px; }

/* --------------------------------- Hero --------------------------------- */
.hero { position: relative; padding-block: clamp(32px, 7vw, 80px) 60px; text-align: center; }
.hero-owl { inline-size: clamp(88px, 12vw, 128px); margin-inline: auto; margin-block-end: 20px; filter: drop-shadow(0 4px 10px rgba(46,230,166,.02)); }
.hero-owl .owl { animation: owlfloat 5s ease-in-out infinite; }
@keyframes owlfloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
@media (prefers-reduced-motion: reduce) { .hero-owl .owl { animation: none; } }
.hero .status-pill { margin-inline: auto; margin-block-end: 22px; }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(3rem, 11vw, 7rem); line-height: .95; margin: 0;
  letter-spacing: -.04em; color: var(--ink);
}
.hero h1 b { color: var(--accent); font-weight: 700; }
.hero h1 .suffix {
  display: inline-block; vertical-align: middle;
  font-size: .2em; letter-spacing: .3em; font-weight: 600;
  color: var(--ink-faint); margin-inline-start: .4em;
  border: 1px solid var(--surface-brd-2); border-radius: 6px; padding: .35em .6em;
}
.hero .glitch { position: relative; }
.hero-sub {
  max-inline-size: 640px; margin: 20px auto 34px;
  color: var(--ink-dim); font-size: clamp(1rem, 1.6vw, 1.25rem);
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-family: var(--mono);
  font-size: .78rem; letter-spacing: .12em; text-transform: uppercase;
  border: 1px solid var(--surface-brd-2); background: var(--bg-elev);
  color: var(--ink-dim); width: max-content;
}
.status-pill .dot { inline-size: 8px; block-size: 8px; border-radius: 50%; background: var(--ink-faint); }
.status-pill.live { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.status-pill.live .dot { background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: pulse 1.6s infinite; }
.status-pill.upcoming { color: var(--accent-amber); }
.status-pill.upcoming .dot { background: var(--accent-amber); }
.status-pill.ended { color: var(--accent-3); }
.status-pill.ended .dot { background: var(--accent-3); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* Stats row */
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-block: 54px;
}
.stat {
  padding: 22px; text-align: center;
  background: var(--surface); border: 1px solid var(--surface-brd);
  border-radius: var(--radius);
}
.stat .num {
  font-family: var(--mono); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800;
  color: var(--accent); line-height: 1;
}
.stat .lbl { color: var(--ink-dim); font-size: .85rem; margin-block-start: 8px; letter-spacing: .04em; }

/* Category grid */
.section-title { font-family: var(--display); font-size: 1.6rem; font-weight: 600; letter-spacing: -.02em; margin: 0 0 6px; }
.section-sub { color: var(--ink-dim); margin: 0 0 24px; }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.cat-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--surface-brd);
  transition: transform .15s, border-color .2s, box-shadow .2s;
  position: relative; overflow: hidden;
}
.cat-card::after {
  content: ""; position: absolute; inset-inline-end: -30px; inset-block-start: -30px;
  inline-size: 90px; block-size: 90px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%);
  opacity: 0; transition: opacity .25s;
}
.cat-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--glow); text-decoration: none; }
.cat-card:hover::after { opacity: 1; }
.cat-card .ico {
  inline-size: 44px; block-size: 44px; border-radius: 11px; display: grid; place-items: center;
  background: var(--bg-elev-2); color: var(--accent); border: 1px solid var(--surface-brd-2);
}
.cat-card .ico svg { inline-size: 22px; block-size: 22px; }
.cat-card .name { font-weight: 700; color: var(--ink); }
.cat-card .count { color: var(--ink-faint); font-family: var(--mono); font-size: .82rem; }

/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-block-start: 24px; }
.feature { padding: 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--surface-brd); }
.feature h3 { margin: 12px 0 8px; font-size: 1.1rem; }
.feature p { color: var(--ink-dim); margin: 0; font-size: .95rem; }
.feature .ico { color: var(--accent); }

/* --------------------------- Auth forms --------------------------------- */
.auth-wrap { max-inline-size: 440px; margin-inline: auto; margin-block-start: 20px; }
.form-field { margin-block-end: 16px; }
.form-field label { display: block; font-size: .85rem; color: var(--ink-dim); margin-block-end: 7px; font-weight: 500; }
.input, .textarea, select.input {
  width: 100%; padding: 11px 14px; font: inherit; color: var(--ink);
  background: var(--bg-elev); border: 1px solid var(--surface-brd-2);
  border-radius: 10px; transition: border-color .15s, box-shadow .15s;
}
.input:focus, .textarea:focus, select.input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.textarea { min-block-size: 120px; resize: vertical; font-family: var(--mono); font-size: .9rem; }
.form-hint { color: var(--ink-faint); font-size: .8rem; margin-block-start: 6px; }
.form-foot { text-align: center; color: var(--ink-dim); margin-block-start: 18px; font-size: .92rem; }

/* Alerts */
.alert {
  padding: 12px 16px; border-radius: 10px; margin-block-end: 18px;
  border: 1px solid; font-size: .92rem; display: flex; gap: 10px; align-items: center;
}
.alert-error   { border-color: color-mix(in srgb, var(--err) 40%, transparent); background: color-mix(in srgb, var(--err) 10%, transparent); color: #ffd7e2; }
.alert-success { border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: color-mix(in srgb, var(--ok) 10%, transparent); color: #c9ffe9; }
.alert-info    { border-color: color-mix(in srgb, var(--info) 40%, transparent); background: color-mix(in srgb, var(--info) 10%, transparent); color: #d4ebff; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .alert-error { color: #8a1734; }
  :root:not([data-theme="dark"]) .alert-success { color: #0a6b4a; }
  :root:not([data-theme="dark"]) .alert-info { color: #0a4e8a; }
}

/* --------------------------- Challenges --------------------------------- */
.chal-toolbar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-block-end: 22px; }
.filter-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-tab {
  padding: 7px 13px; border-radius: 999px; cursor: pointer; font-size: .85rem;
  border: 1px solid var(--surface-brd-2); background: var(--bg-elev); color: var(--ink-dim);
  font-weight: 500; transition: all .15s;
}
.filter-tab:hover { color: var(--ink); }
.filter-tab.active { color: #04120d; background: var(--accent); border-color: var(--accent); font-weight: 600; }
.progress-chip { margin-inline-start: auto; font-family: var(--mono); font-size: .85rem; color: var(--ink-dim); }
.progress-chip b { color: var(--accent); }

.cat-block { margin-block-end: 34px; }
.cat-block > h2 {
  display: flex; align-items: center; gap: 10px; font-size: 1.15rem; margin: 0 0 14px;
  padding-block-end: 10px; border-block-end: 1px solid var(--surface-brd);
}
.cat-block > h2 .ico { color: var(--accent); display: inline-grid; place-items: center; }
.cat-block > h2 .ico svg { inline-size: 20px; block-size: 20px; }
.cat-block > h2 .cat-n { color: var(--ink-faint); font-family: var(--mono); font-size: .85rem; font-weight: 400; margin-inline-start: auto; }

.chal-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 13px; }
.chal-card {
  position: relative; text-align: start; cursor: pointer;
  padding: 18px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--surface-brd);
  transition: transform .14s, border-color .2s, box-shadow .2s;
  display: flex; flex-direction: column; gap: 12px; min-block-size: 128px;
  font: inherit; color: var(--ink); inline-size: 100%;
}
.chal-card:hover { transform: translateY(-3px); border-color: var(--accent-2); box-shadow: var(--shadow); }
.chal-card.solved { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.chal-card.solved::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 6%, transparent); pointer-events: none;
}
.chal-card .top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.chal-card .title { font-weight: 700; font-size: 1.02rem; line-height: 1.3; }
.chal-card .pts { font-family: var(--mono); font-weight: 800; color: var(--accent); white-space: nowrap; }
.chal-card .pts span { font-size: .7rem; color: var(--ink-faint); font-weight: 500; }
.chal-card .meta { display: flex; align-items: center; gap: 10px; margin-block-start: auto; font-size: .78rem; color: var(--ink-faint); font-family: var(--mono); }
.chal-card .solved-tag {
  position: absolute; inset-block-start: 14px; inset-inline-end: 14px;
  color: var(--accent); display: none;
}
.chal-card.solved .solved-tag { display: block; }
.chal-card.solved .pts { opacity: .6; }
.public-chal-card { cursor: default; }
.public-chal-card:hover { transform: none; }
.public-chal-card .title { margin: 0; overflow-wrap: anywhere; }
.public-challenges-cta { margin-block-start: 28px; }
.public-challenges-cta .btn { margin-inline: 5px; }

.diff-dot { inline-size: 7px; block-size: 7px; border-radius: 50%; display: inline-block; }
.diff-easy   { background: var(--diff-easy); }
.diff-medium { background: var(--diff-medium); }
.diff-hard   { background: var(--diff-hard); }
.diff-insane { background: var(--diff-insane); box-shadow: 0 0 8px var(--diff-insane); }

.fb-flame { color: var(--accent-3); }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: rgba(2,5,10,.72); backdrop-filter: blur(4px);
  align-items: flex-start; justify-content: center; padding: 6vh 20px 40px; overflow-y: auto;
}
.modal-overlay.open { display: flex; }
.modal {
  inline-size: 100%; max-inline-size: 620px;
  background: var(--bg-elev); border: 1px solid var(--surface-brd-2);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  animation: modalin .2s ease;
}
@keyframes modalin { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.modal-head { padding: 22px 24px; border-block-end: 1px solid var(--surface-brd); display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; }
.modal-head .cat-label { font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); }
.modal-head h2 { margin: 6px 0 0; font-size: 1.4rem; }
.modal-head .modal-pts { font-family: var(--mono); font-weight: 800; font-size: 1.3rem; color: var(--accent); }
.modal-body { padding: 22px 24px; }
.modal-desc { color: var(--ink-dim); white-space: pre-wrap; word-wrap: break-word; line-height: 1.7; }
.modal-desc code { background: var(--bg-elev-2); padding: 2px 6px; border-radius: 5px; font-family: var(--mono); font-size: .88em; color: var(--accent); }
.modal-meta { display: flex; gap: 18px; flex-wrap: wrap; margin-block: 16px; font-size: .82rem; color: var(--ink-faint); font-family: var(--mono); }
.modal-files { display: flex; flex-direction: column; gap: 8px; margin-block: 16px; }
.file-link { display: inline-flex; align-items: center; gap: 8px; padding: 9px 13px; border-radius: 9px; background: var(--bg-elev-2); border: 1px solid var(--surface-brd-2); color: var(--ink); font-family: var(--mono); font-size: .85rem; width: max-content; }
.file-link:hover { border-color: var(--accent); text-decoration: none; }
.hint-list { display: flex; flex-direction: column; gap: 8px; margin-block: 16px; }
.hint-item { padding: 12px 14px; border-radius: 10px; background: var(--bg-elev-2); border: 1px solid var(--surface-brd); }
.hint-item .hint-head { display: flex; justify-content: space-between; align-items: center; font-size: .85rem; color: var(--ink-dim); }
.hint-item .hint-body { margin-block-start: 8px; color: var(--ink); font-size: .92rem; display: none; }
.hint-item.open .hint-body { display: block; }
.flag-form { display: flex; gap: 10px; margin-block-start: 8px; }
.flag-form .input { font-family: var(--mono); }
.modal-result { margin-block-start: 12px; font-family: var(--mono); font-size: .9rem; min-block-size: 1.2em; }
.modal-result.ok { color: var(--accent); }
.modal-result.fb { color: var(--ok); font-weight: 700; }
.modal-result.err { color: var(--accent-3); }
.modal-solved-banner { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 10px; background: color-mix(in srgb, var(--accent) 12%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); color: var(--accent); font-weight: 600; margin-block-start: 8px; }

/* --------------------------- Scoreboard --------------------------------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--surface-brd); background: var(--surface); }
table.board { inline-size: 100%; border-collapse: collapse; font-size: .94rem; }
table.board th, table.board td { padding: 13px 16px; text-align: start; }
table.board thead th {
  font-family: var(--mono); font-size: .76rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-faint); border-block-end: 1px solid var(--surface-brd); font-weight: 600;
}
table.board tbody tr { border-block-end: 1px solid var(--surface-brd); transition: background .12s; }
table.board tbody tr:last-child { border-block-end: none; }
table.board tbody tr:hover { background: var(--bg-elev-2); }
table.board tbody tr.me { background: color-mix(in srgb, var(--accent) 9%, transparent); }
table.board tbody tr.me td:first-child { box-shadow: inset 3px 0 0 var(--accent); }
.rank-cell { font-family: var(--mono); font-weight: 700; color: var(--ink-dim); inline-size: 70px; }
.rank-1 { color: #ffd24a; } .rank-2 { color: #d8e3ee; } .rank-3 { color: #e08b4a; }
.rank-medal { font-size: 1.05rem; }
.ent-name { display: inline-flex; align-items: center; gap: 9px; font-weight: 600; }
.ent-kind { font-family: var(--mono); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; padding: 2px 7px; border-radius: 5px; border: 1px solid var(--surface-brd-2); color: var(--ink-faint); }
.ent-kind.team { color: var(--accent-2); border-color: color-mix(in srgb, var(--accent-2) 40%, transparent); }
.ent-kind.user { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.score-cell { font-family: var(--mono); font-weight: 700; color: var(--accent); }
.you-tag { font-size: .7rem; color: var(--accent); font-family: var(--mono); padding: 1px 6px; border-radius: 5px; background: color-mix(in srgb, var(--accent) 15%, transparent); }

/* Country flag + name */
.flag { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; color: var(--ink-faint); white-space: nowrap; }
.flag .fi { border-radius: 2px; box-shadow: inset 0 0 0 1px rgba(0,0,0,.18); line-height: 1em; }
.flag .flag-name { font-family: var(--mono); }

/* --------------------------- First bloods ------------------------------- */
.fb-feed .fb-head { display: flex; flex-direction: column; gap: 3px; margin-block-end: 14px; }
.fb-feed h3 { display: flex; align-items: center; gap: 9px; font-family: var(--display); font-weight: 600; }
.fb-ico { color: var(--accent-3); display: inline-grid; place-items: center; }
.fb-list { display: flex; flex-direction: column; }
.fb-row { display: flex; align-items: center; gap: 9px; padding: 9px 0; border-block-end: 1px solid var(--surface-brd); flex-wrap: wrap; font-size: .92rem; }
.fb-row:last-child { border: none; }
.fb-row .fb-name { font-weight: 700; color: var(--ink); }
.fb-row .fb-chal { font-weight: 600; color: var(--accent); }
.fb-row .fb-cat { font-family: var(--mono); font-size: .72rem; color: var(--ink-faint); padding: 1px 7px; border: 1px solid var(--surface-brd-2); border-radius: 5px; }
.fb-row .fb-time { margin-inline-start: auto; color: var(--ink-faint); font-size: .76rem; }

/* --------------------------- Score chart -------------------------------- */
#score-chart { inline-size: 100%; min-block-size: 300px; }
#score-chart svg { inline-size: 100%; height: auto; display: block; }
.chart-grid line { stroke: var(--surface-brd); stroke-width: 1; }
.chart-axis text { fill: var(--ink-faint); font-family: var(--mono); font-size: 11px; }
.chart-line { fill: none; stroke-width: 2.5; }
.chart-dot { stroke: var(--bg-elev); stroke-width: 1.5; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-block-start: 14px; }
.chart-legend .item { display: inline-flex; align-items: center; gap: 7px; font-size: .82rem; color: var(--ink-dim); }
.chart-legend .swatch { inline-size: 12px; block-size: 12px; border-radius: 3px; flex: none; }
.chart-empty { color: var(--ink-faint); text-align: center; padding: 40px 0; font-family: var(--mono); font-size: .9rem; }

/* --------------------------- Team / profile ---------------------------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.invite-code {
  font-family: var(--mono); font-size: 1.5rem; font-weight: 800; letter-spacing: .25em;
  color: var(--accent); background: var(--bg-elev); padding: 14px 18px; border-radius: 10px;
  border: 1px dashed var(--surface-brd-2); text-align: center; user-select: all;
}
.member-row { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-block-end: 1px solid var(--surface-brd); }
.member-row:last-child { border: none; }
.avatar { inline-size: 36px; block-size: 36px; border-radius: 9px; display: grid; place-items: center; font-family: var(--mono); font-weight: 800; color: #04120d; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.badge-captain { font-size: .68rem; font-family: var(--mono); color: var(--accent-amber); border: 1px solid color-mix(in srgb, var(--accent-amber) 40%, transparent); padding: 2px 7px; border-radius: 5px; margin-inline-start: auto; }

.solve-list { display: flex; flex-direction: column; }
.solve-item { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-block-end: 1px solid var(--surface-brd); }
.solve-item:last-child { border: none; }
.solve-item .s-title { font-weight: 600; }
.solve-item .s-cat { font-family: var(--mono); font-size: .76rem; color: var(--ink-faint); }
.solve-item .s-pts { margin-inline-start: auto; font-family: var(--mono); font-weight: 700; color: var(--accent); }
.solve-item .s-date { font-family: var(--mono); font-size: .76rem; color: var(--ink-faint); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--ink-dim); }
.empty-state .ico { color: var(--ink-faint); margin-block-end: 14px; }
.empty-state h3 { margin: 0 0 8px; color: var(--ink); }

/* --------------------------- Admin -------------------------------------- */
.admin-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-block-end: 24px; }
.admin-table .row-actions { flex-wrap: wrap; align-items: center; }
.admin-table .row-actions .input { inline-size: auto; min-inline-size: 120px; }
.admin-table { inline-size: 100%; border-collapse: collapse; font-size: .9rem; }
.admin-table th, .admin-table td { padding: 11px 14px; text-align: start; border-block-end: 1px solid var(--surface-brd); }
.admin-table th { font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-faint); }
.admin-table .actions { display: flex; gap: 6px; }
.tag-hidden { font-size: .68rem; font-family: var(--mono); color: var(--accent-amber); border: 1px solid color-mix(in srgb,var(--accent-amber) 40%, transparent); padding: 1px 6px; border-radius: 4px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }

/* --------------------------- Footer ------------------------------------- */
.site-footer {
  border-block-start: 1px solid var(--surface-brd);
  padding-block: 24px; color: var(--ink-faint); font-size: .85rem;
  margin-block-start: auto;
}
.site-footer .container { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; }
.site-footer .mono { font-family: var(--mono); }
.footer-discord { display: inline-flex; align-items: center; gap: 9px; color: var(--ink-dim); text-decoration: none; transition: color .18s ease, transform .18s ease; }
.footer-discord svg { inline-size: 20px; block-size: 20px; color: #5865f2; }
.footer-discord:hover { color: var(--ink); transform: translateY(-1px); }
.footer-discord:focus-visible { outline: 2px solid var(--accent-3); outline-offset: 4px; border-radius: 3px; }
.brand-foot { font-family: var(--display); font-weight: 700; color: var(--ink-dim); }
.brand-foot .suffix { color: var(--ink-faint); font-weight: 600; font-size: .8em; letter-spacing: .12em; margin-inline-start: 2px; }

/* --------------------------- Utilities ---------------------------------- */
.mono { font-family: var(--mono); }
.muted { color: var(--ink-dim); }
.mt-0 { margin-block-start: 0; }
.center { text-align: center; }
.hidden { display: none !important; }
.flame-badge { display: inline-flex; align-items: center; gap: 5px; color: var(--accent-3); font-size: .78rem; font-family: var(--mono); }

@keyframes shake { 0%,100%{transform:translateX(0)} 20%,60%{transform:translateX(-7px)} 40%,80%{transform:translateX(7px)} }
.flag-form.shake { animation: shake .4s; }

/* Utility classes (keep templates free of inline styles for strict CSP) */
.c-accent { color: var(--accent); }
.c-accent3 { color: var(--accent-3); }
.c-faint { color: var(--ink-faint); }
.ta-end { text-align: end; }
.m-0 { margin: 0; }
.mt-10 { margin-block-start: 10px; }
.mt-14 { margin-block-start: 14px; }
.mt-18 { margin-block-start: 18px; }
.mb-8 { margin-block-end: 8px; }
.section-gap { margin-block: 56px; }
.d-inline { display: inline; }
.ms-auto { margin-inline-start: auto; }
.fw-600 { font-weight: 600; }
.fs-sm { font-size: .76rem; }
.upper { text-transform: uppercase; }
.border-none { border: none; }
.pad-xl { padding-block: 90px; }
.pad-cell { padding: 30px; }
.linkbtn { background: none; border: none; cursor: pointer; }
.code-input { text-transform: uppercase; letter-spacing: .2em; }
.stats-3 { grid-template-columns: repeat(3, 1fr); margin-block: 0 28px; }
.stats-5 { grid-template-columns: repeat(5, 1fr); margin-block: 0 26px; }
.rule-list { margin: 0; padding-inline-start: 22px; line-height: 2; }
.rule-list li { margin-block-end: 8px; }
.error-code { font-size: 3rem; margin: 0; color: var(--accent-3); }
.row-actions { display: flex; gap: 10px; margin-block-start: 10px; }
.row-wrap { display: flex; gap: 10px; margin-block-start: 14px; flex-wrap: wrap; }
.check-label { display: flex; align-items: center; gap: 10px; cursor: pointer; }
@media (max-width: 860px) {
  .stats-3, .stats-5 { grid-template-columns: repeat(2, 1fr); }
}

/* Responsive */
@media (max-width: 860px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav { height: auto; flex-wrap: wrap; padding-block: 10px; gap: 6px; }
  .nav-links { width: 100%; justify-content: space-evenly; margin-inline-start: 0; }
  .nav-sep { display: none; }
  main { padding-block: 24px 48px; }
}

/* RTL tweaks: logical properties handle most of it; fix number/mono runs. */
[dir="rtl"] .invite-code,
[dir="rtl"] .mono,
[dir="rtl"] .score-cell,
[dir="rtl"] .rank-cell,
[dir="rtl"] .chal-card .pts { direction: ltr; unicode-bidi: isolate; }
[dir="rtl"] .hero h1 { direction: ltr; }
/* Social sign-in and security log controls. */
.oauth-buttons { margin-top: 1.5rem; }
.oauth-buttons > .muted { margin-block: 0 .8rem; }
.oauth-buttons .oauth-button { display:flex; width:100%; min-height:48px; align-items:center; justify-content:center; gap:11px; margin-block:.65rem; padding:10px 16px; border:1px solid var(--border); border-radius:10px; background:var(--surface); color:var(--text); font-weight:650; text-align:center; text-decoration:none; transition:border-color .18s ease,background .18s ease,transform .18s ease; }
.oauth-buttons .oauth-button:hover { border-color:var(--accent); background:var(--surface-2,var(--surface)); transform:translateY(-1px); }
.oauth-button:focus-visible { outline:2px solid var(--accent); outline-offset:3px; }
.oauth-icon { width:20px; height:20px; flex:0 0 20px; }
.discord-icon { color:#5865F2; }
.google-icon { display:block; }
.audit-filters { display: flex; flex-wrap: wrap; gap: 1rem; align-items: end; }
.audit-filters .form-field { flex: 1 1 180px; margin: 0; }
.audit-filters .btn { align-self: end; }
.audit-table td { vertical-align: top; }
.audit-detail { min-width: 220px; max-width: 480px; white-space: normal; overflow-wrap: anywhere; }
.log-ai-cta { display:flex; align-items:center; justify-content:space-between; gap:22px; margin-block-end:18px; border-color:color-mix(in srgb,var(--accent-2) 24%,var(--surface-brd)); }
.log-ai-cta h2 { margin:0 0 4px; font-size:1.08rem; }
.log-ai-cta p { margin-block:0; max-width:760px; }
.log-ai-cta .eyebrow { margin-block-end:5px; }
.log-ai-cta form { flex:none; }
.ai-analysis-summary { margin-block-end:18px; }
.ai-analysis-summary .stats-row { margin:0 0 25px; gap:10px; }
.ai-analysis-summary .stat { padding:16px 12px; }
.ai-analysis-summary .num { font-size:clamp(1.35rem,3vw,2rem); }
.ai-analysis-summary h2,.ai-analysis-result h2 { margin:0 0 12px; font-size:1.12rem; }
.ai-signal-list { display:flex; flex-wrap:wrap; gap:8px; }
.ai-signal-chip { display:inline-flex; align-items:center; gap:10px; padding:7px 10px; border:1px solid var(--surface-brd-2); border-radius:999px; color:var(--ink-dim); background:var(--bg-elev); font-size:.8rem; }
.ai-signal-chip strong { color:var(--accent); font-family:var(--mono); }
.ai-analysis-result { margin-block-end:18px; }
.ai-analysis-text { padding:18px; border-inline-start:2px solid var(--accent); border-radius:0 10px 10px 0; background:var(--bg-elev); white-space:pre-wrap; overflow-wrap:anywhere; line-height:1.8; }
.ai-analysis-result > .muted { margin-block:14px 0; }
@media(max-width:700px) { .log-ai-cta { align-items:stretch; flex-direction:column; } .log-ai-cta form,.log-ai-cta form .btn { width:100%; } }

[hidden] { display:none !important; }
.badge-list { display:flex; flex-wrap:wrap; gap:12px; }
.achievement { border:1px solid var(--border); background:var(--surface); border-radius:30px; padding:10px 16px; }
.certificate-actions { display:flex; justify-content:center; gap:12px; margin:28px 0; }
.certificate-sheet { max-width:1050px; margin:28px auto; padding:65px 30px; text-align:center; border:2px solid var(--accent); border-radius:20px; background:radial-gradient(ellipse at top,#133e31,#091b16); }
.certificate-brand { color:var(--accent); font-size:44px; letter-spacing:5px; font-weight:800; }
.certificate-name { font-size:clamp(25px,5vw,48px); color:var(--accent); overflow-wrap:anywhere; }
.certificate-award { font-size:24px; }
.certificate-code { font-size:12px; overflow-wrap:anywhere; direction:ltr; }
@media print { .header,.footer,.certificate-actions,.flash,.bg-grid { display:none!important; } body { background:white;color:black; } .certificate-sheet { background:white;color:black;margin:0;border-color:#14714f;break-inside:avoid; } .certificate-brand,.certificate-name { color:#14714f; } @page { size:A4 landscape;margin:12mm; } }

.certificate-premium{position:relative;isolation:isolate;background:#faf8f0;color:#172b32;border:12px double #b79347;border-radius:0;padding:40px 55px;box-shadow:0 20px 60px #0005;font-family:Inter,Cairo,sans-serif}
.certificate-premium:before{content:'';position:absolute;inset:14px;border:1px solid #d9c69a;pointer-events:none;z-index:-1}
.certificate-topline{display:flex;justify-content:space-between;align-items:center;gap:20px;color:#5b6c72;font-size:10px;letter-spacing:2px;direction:ltr}
.certificate-topline span:first-child{font-size:25px;color:#213c40;font-weight:800;letter-spacing:4px}
.certificate-kicker{color:#906c28;letter-spacing:4px;font-size:12px;margin:45px 0 14px}
.certificate-premium h1{font-size:clamp(25px,4vw,40px);color:#172b32;margin:12px 0 30px}
.certificate-premium .certificate-name{color:#1a5848;font-size:clamp(28px,4.5vw,52px);padding-bottom:18px;border-bottom:1px solid #d4bc88;max-width:720px;margin:20px auto}
.certificate-event{font-size:24px;color:#172b32;margin:14px 0}
.certificate-facts{display:flex;justify-content:center;gap:40px;margin:25px 0;font-size:12px;color:#546266}
.certificate-facts span,.certificate-issuer,.certificate-verification{display:flex;flex-direction:column;gap:8px}
.certificate-facts b{font-size:20px;color:#213c40}
.certificate-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:35px;gap:20px}
.certificate-issuer{text-align:start;border-top:1px solid #ad8a43;padding-top:12px;font-size:12px}
.certificate-seal{width:100px;height:100px;border-radius:50%;border:5px double #b79347;display:flex;flex-direction:column;justify-content:center;font-size:12px;color:#906c28;letter-spacing:1px}
.certificate-seal strong{font-size:11px}
.certificate-verification{align-items:center;font-size:10px;color:#213c40}
.certificate-premium .certificate-code{color:#546266;margin-top:24px}
@media(max-width:600px){.certificate-premium{padding:28px 18px;border-width:6px}.certificate-topline{flex-direction:column;gap:8px}.certificate-facts{gap:15px}.certificate-bottom{flex-wrap:wrap;justify-content:center}.certificate-issuer{text-align:center}.certificate-seal{width:80px;height:80px}}
@media print{.site-header,footer,.certificate-actions{display:none!important}.certificate-premium{box-shadow:none;padding:20px 35px;max-width:none;border-width:8px;print-color-adjust:exact;-webkit-print-color-adjust:exact}.certificate-kicker{margin-top:20px}.certificate-premium h1{margin-bottom:15px}.certificate-bottom{margin-top:20px}}

.ai-coach{margin-block-start:18px;padding:16px;border:1px solid color-mix(in srgb,var(--accent-2) 28%,transparent);border-radius:12px;background:color-mix(in srgb,var(--accent-2) 5%,var(--bg-elev))}
.ai-coach-title{margin:0 0 5px;color:var(--accent);font-size:1rem}
.ai-coach-intro,.ai-coach-privacy,.ai-coach-disabled{margin:4px 0 10px;color:var(--ink-dim);font-size:.85rem}
.ai-coach-privacy{font-size:.76rem;color:var(--ink-faint)}
.ai-coach-form{display:grid;grid-template-columns:minmax(180px,.8fr) minmax(220px,2fr) auto;gap:9px;align-items:start}
.ai-coach-form textarea{min-height:42px;resize:vertical}
.ai-coach-answer{margin:10px 0 0;padding:10px 12px;border-inline-start:2px solid var(--accent);border-radius:0 8px 8px 0;background:color-mix(in srgb,var(--accent) 7%,transparent);color:var(--ink);white-space:pre-wrap;overflow-wrap:anywhere}
.ai-coach-answer:empty{display:none}
.ai-coach-answer.error{border-color:var(--err);color:var(--err)}
@media(max-width:620px){.ai-coach-form{grid-template-columns:1fr}.ai-coach-form .btn{justify-self:start}}

/* Homepage refresh: keep the city scene in the welcome panel and give every
   challenge track a visible, full-width control. */
body::before {
  background: #08090c;
  transform: none;
  animation: none;
  will-change: auto;
}
body::after {
  background:
    radial-gradient(60% 35% at 50% 0, rgba(46,230,166,.045), transparent 74%),
    #08090c;
}
.range-world {
  --track-color: #2ee6a6;
  isolation: isolate;
  position: relative;
  display: block;
  min-height: 0;
  margin-block-start: -12px;
  padding: clamp(24px, 4vw, 46px);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 22px;
  background: #08090c;
  box-shadow: 0 24px 70px rgba(0,0,0,.28);
}
.range-world::before,
.range-world::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  pointer-events: none;
}
.range-world::before {
  background:
    linear-gradient(90deg, rgba(6,8,12,.96) 0%, rgba(6,8,12,.9) 37%, rgba(6,8,12,.62) 100%),
    linear-gradient(0deg, #08090c 0%, transparent 46%),
    url('/static/img/strxctf-arena.webp') center 48% / cover no-repeat;
  opacity: .92;
}
.range-world::after {
  background: radial-gradient(55% 48% at 100% 0, rgba(46,230,166,.10), transparent 72%);
}
.range-world-inner {
  position: relative;
  z-index: 1;
  width: min(100%, 1120px);
  margin-inline: auto;
}
.range-world-status {
  justify-content: flex-start;
  gap: 9px;
  color: #e8f2ed;
  font: 650 .74rem/1.4 var(--sans);
  letter-spacing: .04em;
  text-transform: none;
}
.range-status-mark {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px color-mix(in srgb, var(--accent) 55%, transparent);
}
.range-status-separator { color: #66736d; }
.range-status-count { color: #b2beb8; font: 500 .8rem/1.4 var(--sans); letter-spacing: 0; }
.range-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .88fr);
  align-items: center;
  gap: clamp(28px, 5vw, 68px);
  margin-block: 40px 30px;
}
.range-intro { min-width: 0; }
.range-intro .eyebrow,
.section-gap > .eyebrow {
  margin-block-end: 10px;
  color: var(--accent);
  font: 650 .77rem/1.5 var(--sans);
  letter-spacing: .035em;
  text-transform: none;
}
.range-hero-title {
  max-width: 14ch;
  margin: 0;
  color: #f5f7f6;
  font: 700 clamp(2.3rem, 4.1vw, 3.8rem)/1.12 var(--display);
  letter-spacing: -.035em;
  text-wrap: balance;
}
.range-hero-copy {
  max-width: 48ch;
  margin: 18px 0 0;
  color: #c0c9c4;
  font-size: clamp(.98rem, 1.4vw, 1.1rem);
  line-height: 1.8;
}
.range-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-block-start: 26px;
}
.range-hero-actions .btn { min-height: 46px; }
.range-selector {
  isolation: auto;
  width: 100%;
  margin: 0;
  padding: 22px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  background: rgba(9,12,14,.76);
  box-shadow: 0 14px 38px rgba(0,0,0,.2);
  text-align: start;
  backdrop-filter: blur(8px);
}
.range-selector::before { content: none; }
.range-track-label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin: 0 0 5px;
  color: #a8b5ae;
  font: 500 .83rem/1.5 var(--sans);
  letter-spacing: 0;
  text-transform: none;
}
.range-track-label > span:first-of-type { margin: 0; color: #707d76; }
.range-track-label [data-range-track-label] { color: var(--accent); }
.range-track-title {
  margin: 0;
  color: #f4f7f5;
  font: 700 clamp(1.35rem, 2.2vw, 1.8rem)/1.3 var(--display);
  letter-spacing: -.025em;
  text-shadow: none;
}
.range-stage-rail {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: clamp(12px, 2.5vw, 28px);
  width: 100%;
  min-height: 60px;
  margin: 24px 0 4px;
}
.range-stage-rail.has-stages::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 8px;
  inset-inline: 8px;
  height: 1px;
  background: linear-gradient(90deg, rgba(46,230,166,.18), rgba(46,230,166,.55), rgba(46,230,166,.18));
  box-shadow: none;
}
.range-stage-rail.has-stages::after {
  content: none;
  animation: none;
}
.range-stage-node {
  position: relative;
  z-index: 2;
  flex: 0 1 38px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 28px;
  padding: 0 2px;
  border: 0;
  background: transparent;
  color: #b7c1bb;
  cursor: pointer;
  font: 600 .72rem/1.2 var(--sans);
}
.range-stage-node[hidden],
.range-empty-stage[hidden] { display: none !important; }
.range-stage-node:focus-visible,
.range-track-button:focus-visible,
.range-play:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}
.range-stage-diamond {
  display: grid;
  place-items: center;
  width: 16px;
  height: 16px;
  transform: rotate(45deg);
  border-color: #66c7a5;
  background: #111a16;
  box-shadow: 0 0 0 4px rgba(46,230,166,.055);
}
.range-stage-diamond span { color: #062017; font: 800 .68rem/1 var(--sans); transform: rotate(-45deg); }
.range-stage-node.is-selected .range-stage-diamond {
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(46,230,166,.12);
}
.range-stage-node.is-solved .range-stage-diamond { border-color: #42e6ae; background: #42e6ae; box-shadow: none; }
.range-stage-node.is-solved .range-stage-number { color: #76f2c7; }
.range-empty-stage {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,.075);
  border-radius: 10px;
  background: rgba(255,255,255,.025);
  color: #bdc7c1;
  font: 400 .88rem/1.6 var(--sans);
  letter-spacing: 0;
}
.range-empty-diamond { flex: 0 0 10px; border-color: rgba(46,230,166,.7); box-shadow: none; }
.range-stage-hint {
  min-height: 1.5em;
  margin: 5px 0 14px;
  color: #929f98;
  font: 400 .8rem/1.5 var(--sans);
  letter-spacing: 0;
}
.range-selection {
  width: 100%;
  margin: 0;
  padding: 15px 0 0;
  border-block-start: 1px solid rgba(255,255,255,.09);
  background: transparent;
}
.range-selection-meta {
  gap: 8px;
  color: #a5b0aa;
  font: 500 .78rem/1.5 var(--sans);
  letter-spacing: 0;
  text-transform: none;
}
.range-difficulty { color: var(--accent); }
.range-selected-title {
  margin-block: 4px 2px;
  color: #eef2ef;
  font: 650 1rem/1.45 var(--sans);
}
.range-progress { color: #9ba8a1; font: 400 .77rem/1.5 var(--sans); letter-spacing: 0; }
.range-play {
  min-width: 130px;
  min-height: 44px;
  padding: 10px 14px;
  clip-path: none;
  border: 1px solid rgba(46,230,166,.36);
  border-radius: 10px;
  background: var(--accent);
  color: #07110c;
  font: 650 .88rem/1.3 var(--sans);
  letter-spacing: 0;
}
.range-play:hover { background: #50edb9; filter: none; }
.range-play.is-disabled,
.range-play[aria-disabled="true"] { border-color: rgba(255,255,255,.12); background: #262b28; color: #a7b0ab; opacity: .72; }
.range-track-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
  align-items: stretch;
  gap: 9px;
  width: 100%;
  margin: 10px 0 0;
  padding: 18px 0 0;
  overflow: visible;
  border-block-start: 1px solid rgba(255,255,255,.1);
  scroll-snap-type: none;
}
.range-track-nav::before { content: none; }
.range-track-button {
  --track-color: var(--accent-2);
  display: grid;
  grid-template-columns: 11px minmax(0,1fr);
  grid-template-rows: auto auto;
  align-content: center;
  justify-items: start;
  column-gap: 10px;
  row-gap: 3px;
  min-width: 0;
  min-height: 62px;
  padding: 10px 11px;
  border: 1px solid rgba(255,255,255,.085);
  border-radius: 11px;
  background: rgba(9,12,14,.55);
  color: #cad2cd;
  cursor: pointer;
  text-align: start;
  scroll-snap-align: none;
}
.range-track-button:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--track-color) 45%, transparent);
  background: rgba(255,255,255,.045);
}
.range-track-button.is-active {
  border-color: color-mix(in srgb, var(--track-color) 55%, transparent);
  background: color-mix(in srgb, var(--track-color) 8%, rgba(9,12,14,.8));
}
.range-track-diamond {
  grid-row: 1 / span 2;
  align-self: center;
  width: 9px;
  height: 9px;
  margin-inline-start: 1px;
  transform: rotate(45deg);
  border: 1px solid var(--track-color);
  background: transparent;
}
.range-track-button.is-active .range-track-diamond {
  box-shadow: 0 0 9px color-mix(in srgb, var(--track-color) 65%, transparent);
  background: var(--track-color);
}
.range-track-name {
  overflow: visible;
  max-width: none;
  color: inherit;
  font: 600 .79rem/1.35 var(--sans);
  text-overflow: clip;
  white-space: normal;
  overflow-wrap: normal;
}
.range-track-count { color: #94a199; font: 400 .72rem/1.35 var(--sans); }
.range-track-button.is-active .range-track-name { color: var(--track-color); }
.range-track-button[data-track="web"] { --track-color: #29dcbf; }
.range-track-button[data-track="crypto"] { --track-color: #f3c34f; }
.range-track-button[data-track="pwn"] { --track-color: #ff708d; }
.range-track-button[data-track="reverse"] { --track-color: #8bb6ff; }
.range-track-button[data-track="forensics"] { --track-color: #b493ff; }
.range-track-button[data-track="osint"] { --track-color: #4be0ad; }
.range-track-button[data-track="stego"] { --track-color: #ff83cb; }
.range-track-button[data-track="mobile"] { --track-color: #5cc4ff; }
.range-track-button[data-track="cloud"] { --track-color: #91dcff; }
.range-track-button[data-track="ad"] { --track-color: #c4dc74; }
.range-track-button[data-track="hardware"] { --track-color: #fca66f; }
.range-track-button[data-track="blockchain"] { --track-color: #70d8e5; }
.range-track-button[data-track="aiml"] { --track-color: #c2a0ff; }
.range-track-button[data-track="misc"] { --track-color: #b8c2d6; }
.range-all-challenges {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-block-start: 16px;
  color: #b3c1b9;
  font: 550 .83rem/1.4 var(--sans);
  letter-spacing: 0;
}
.range-all-challenges:hover { color: #fff; }
.home-stats { gap: 12px; margin-block: 34px 48px; }
@media (min-width: 721px) {
  .home-stats { grid-template-columns: repeat(4, minmax(0,1fr)); }
}
.stat { padding: 18px 14px; background: rgba(15,17,21,.92); }
.stat .lbl { letter-spacing: 0; }
.section-gap { margin-block: 52px; }
.section-title { font-size: clamp(1.55rem, 2.6vw, 2rem); letter-spacing: -.025em; }
.section-sub { max-width: 68ch; margin-block-end: 22px; line-height: 1.75; }
.cat-card,
.feature { background: rgba(15,17,21,.92); }
.cat-card { min-height: 168px; }
.feature { border-radius: 14px; padding: 22px; }
.feature h3 { line-height: 1.4; }
@media (max-width: 900px) {
  .range-main { grid-template-columns: minmax(0,1fr) minmax(320px,.95fr); gap: 24px; }
}
@media (max-width: 720px) {
  .range-world { margin-block-start: -10px; padding: 22px 18px; border-radius: 18px; }
  .range-world::before {
    background:
      linear-gradient(180deg, rgba(6,8,12,.8) 0%, rgba(6,8,12,.92) 42%, #08090c 100%),
      url('/static/img/strxctf-arena.webp') center / cover no-repeat;
  }
  .range-main { grid-template-columns: 1fr; gap: 24px; margin-block: 28px 22px; }
  .range-hero-title { max-width: 16ch; font-size: clamp(2.15rem, 8vw, 3rem); }
  .range-hero-copy { margin-block-start: 12px; }
  .range-hero-actions { margin-block-start: 18px; }
  .range-selector { padding: 18px 15px; }
  .range-track-nav { grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); gap: 8px; padding-block-start: 14px; }
  .home-stats { grid-template-columns: repeat(2, minmax(0,1fr)); margin-block: 28px 38px; }
  .section-gap { margin-block: 42px; }
}
@media (max-width: 420px) {
  .range-world { padding: 19px 13px; }
  .range-world-status { gap: 7px; font-size: .7rem; }
  .range-status-count { font-size: .74rem; }
  .range-hero-title { font-size: clamp(2rem, 9vw, 2.55rem); }
  .range-hero-actions .btn { flex: 1 1 auto; justify-content: center; }
  .range-selector { padding: 16px 12px; }
  .range-selection { align-items: stretch; flex-direction: column; }
  .range-play { width: 100%; }
  .range-stage-rail { gap: 10px; }
  .range-track-nav { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  .range-stage-rail::after { animation: none !important; }
}