/* ═══════════════════════════════════════════════════════════════════
   CTFHive — Material Dark
   Smooth, sleek Material-inspired dark theme. Bright blue accents.
   Fonts: Exo 2 · Nunito · Fira Code
   ═══════════════════════════════════════════════════════════════════ */

/* ── Custom Properties ───────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-void:     #060B14;
  --bg-base:     #0A1120;
  --bg-surface:  #0F1928;
  --bg-elevated: #162032;
  --bg-hover:    #1C2840;
  --bg-input:    #080E1B;

  /* Borders — brighter blue tint */
  --b0: rgba(96,165,250, 0.08);
  --b1: rgba(96,165,250, 0.18);
  --b2: rgba(96,165,250, 0.36);
  --b3: rgba(96,165,250, 0.72);

  /* Accent palette — brighter than before */
  --blue:    #60A5FA;   /* primary sky blue — much brighter */
  --cyan:    #34D399;   /* emerald teal */
  --electric:#3B82F6;   /* electric blue */
  --indigo:  #A78BFA;   /* violet */
  --red:     #F87171;   /* error */
  --green:   #4ADE80;   /* success */
  --amber:   #FBBF24;   /* warning */
  --magenta: #E879F9;   /* admin/special */

  /* Text — slightly blue-tinted for warmth */
  --tx:   #E8F0FE;
  --tx-m: rgba(232,240,254, 0.60);
  --tx-d: rgba(232,240,254, 0.32);

  /* Glows */
  --glow-b: 0 0 10px rgba(96,165,250,0.55),  0 0 32px rgba(96,165,250,0.14);
  --glow-c: 0 0 10px rgba(52,211,153,0.55),  0 0 32px rgba(52,211,153,0.14);
  --glow-r: 0 0 10px rgba(248,113,113,0.60), 0 0 32px rgba(248,113,113,0.15);
  --glow-g: 0 0 10px rgba(74,222,128,0.50),  0 0 32px rgba(74,222,128,0.12);
  --glow-i: 0 0 10px rgba(167,139,250,0.50), 0 0 32px rgba(167,139,250,0.12);
  --glow-magenta: 0 0 10px rgba(232,121,249,0.55), 0 0 32px rgba(232,121,249,0.14);

  /* Typography */
  --font-brand:   'Exo 2', sans-serif;
  --font-display: 'Nunito', sans-serif;
  --font-body:    'Nunito', sans-serif;
  --font-mono:    'Fira Code', monospace;

  /* Material-inspired shape */
  --r:    8px;
  --r-sm: 4px;
  --r-lg: 12px;
  --r-xl: 20px;
  --t:    200ms cubic-bezier(0.2, 0, 0, 1);

  /* Elevation shadows */
  --elev-1: 0 1px 3px rgba(0,0,0,0.35), 0 1px 2px rgba(0,0,0,0.25);
  --elev-2: 0 4px 12px rgba(0,0,0,0.40), 0 2px 6px rgba(0,0,0,0.30);
  --elev-3: 0 10px 28px rgba(0,0,0,0.50), 0 4px 10px rgba(0,0,0,0.35);

  /* Legacy aliases */
  --cut: 0px;
  --neon-green:   var(--blue);
  --neon-cyan:    var(--cyan);
  --neon-magenta: var(--magenta);
  --neon-amber:   var(--amber);
  --neon-red:     var(--red);
  --neon-purple:  var(--indigo);
  --text-primary: var(--tx);
  --text-muted:   var(--tx-m);
  --text-dim:     var(--tx-d);
  --glow-green:   var(--glow-b);
  --glow-cyan:    var(--glow-c);
  --surface:      rgba(96,165,250,0.08);
  --radius:       var(--r);
  --radius-sm:    var(--r-sm);
  --radius-lg:    var(--r-lg);
}

/* ── Reset ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
}

/* ── Scrollbar ───────────────────────────────────────────────────── */
::-webkit-scrollbar              { width: 7px; height: 7px; }
::-webkit-scrollbar-track        { background: var(--bg-void); }
::-webkit-scrollbar-thumb        { background: var(--b2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover  { background: var(--blue); }

/* ── Body — flex column for sticky footer ────────────────────────── */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.65;
  color: var(--tx);
  background: var(--bg-void);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 130% 70% at 50% -5%, rgba(60,130,250,0.07) 0%, transparent 55%),
    radial-gradient(ellipse 80% 50% at 80% 100%, rgba(52,211,153,0.03) 0%, transparent 60%);
}

/* Subtle grid overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(96,165,250,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96,165,250,0.028) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

/* Vignette */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse 90% 90% at 50% 0%, transparent 30%, rgba(6,11,20,0.85) 100%);
  pointer-events: none;
}

::selection { background: rgba(96,165,250,0.30); color: #fff; }

/* ── Animations ──────────────────────────────────────────────────── */
@keyframes co-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes co-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes blink {
  0%,49%  { opacity: 1; }
  50%,100%{ opacity: 0; }
}
@keyframes pulse-blue {
  0%, 100% { box-shadow: 0 0 0 0 rgba(96,165,250,0); }
  50%      { box-shadow: 0 0 18px 3px rgba(96,165,250,0.25); }
}
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); }
  50%      { box-shadow: 0 0 18px 3px rgba(52,211,153,0.25); }
}
@keyframes nav-shimmer {
  0%   { background-position: -100% 0; }
  100% { background-position: 200% 0; }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.page-content > * { animation: co-in 0.35s var(--t) both; }
.page-content > *:nth-child(1)   { animation-delay: 0.04s; }
.page-content > *:nth-child(2)   { animation-delay: 0.09s; }
.page-content > *:nth-child(3)   { animation-delay: 0.14s; }
.page-content > *:nth-child(4)   { animation-delay: 0.19s; }
.page-content > *:nth-child(n+5) { animation-delay: 0.23s; }

/* ── Links ───────────────────────────────────────────────────────── */
a { color: var(--blue); text-decoration: none; transition: color var(--t), text-shadow var(--t); }
a:hover { color: var(--cyan); text-shadow: var(--glow-c); }

/* ── Container ───────────────────────────────────────────────────── */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Navigation ──────────────────────────────────────────────────── */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(9,17,32,0.88);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--b1);
  box-shadow: 0 1px 0 rgba(96,165,250,0.06), 0 8px 28px rgba(0,0,0,0.45);
  transition: background var(--t), box-shadow var(--t);
}

.nav-bar.scrolled {
  background: rgba(6,11,20,0.96);
  border-bottom-color: var(--b2);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  gap: 1rem;
}

.nav-brand,
.ctfhive-brand {
  font-family: var(--font-brand);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--blue);
  text-transform: uppercase;
  text-shadow: var(--glow-b);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--t), text-shadow var(--t);
}
.nav-brand i { font-size: 0.85rem; opacity: 0.9; color: var(--cyan); }
.nav-brand:hover { color: var(--cyan); text-shadow: var(--glow-c); }

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.1rem;
  flex-wrap: wrap;
}

.nav-links li a,
.nav-inline-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding: 0.38rem 0.8rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--tx-m);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--t), background var(--t);
  border-radius: var(--r-sm);
  text-decoration: none;
  position: relative;
}
.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.6rem;
  right: 0.6rem;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--t);
}
.nav-links li a:hover,
.nav-inline-btn:hover {
  color: var(--tx);
  background: rgba(96,165,250,0.08);
  text-shadow: none;
}
.nav-links li a:hover::after { transform: scaleX(1); }
.nav-links li a.active {
  color: var(--blue);
  background: rgba(96,165,250,0.10);
}
.nav-links li a.active::after {
  transform: scaleX(1);
  box-shadow: var(--glow-b);
  background: var(--blue);
}

.nav-user {
  font-family: var(--font-display);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--tx-m);
  padding: 0.38rem 0.6rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--b1);
  color: var(--tx-m);
  padding: 0.4rem 0.7rem;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--t);
}
.nav-toggle:hover { border-color: var(--b2); color: var(--blue); }

/* ── Flash Messages ──────────────────────────────────────────────── */
.flash-container { padding: 1rem 0 0.5rem; }
.flash-msg {
  padding: 0.8rem 1.1rem;
  margin-bottom: 0.5rem;
  border-radius: var(--r);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-left: 3px solid;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  animation: co-in 0.3s var(--t) both;
  box-shadow: var(--elev-1);
}
.flash-msg::before {
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.flash-msg.success { background: rgba(74,222,128,0.09); border-color: var(--green); color: var(--green); }
.flash-msg.success::before { content: '\f00c'; }
.flash-msg.error,
.flash-msg.danger  { background: rgba(248,113,113,0.09); border-color: var(--red);   color: var(--red);   }
.flash-msg.error::before,
.flash-msg.danger::before { content: '\f00d'; }
.flash-msg.warning { background: rgba(251,191,36,0.09); border-color: var(--amber); color: var(--amber); }
.flash-msg.warning::before { content: '\f071'; }
.flash-msg.info    { background: rgba(52,211,153,0.09); border-color: var(--cyan); color: var(--cyan); }
.flash-msg.info::before    { content: '\f129'; }

/* ── Page Content — flex: 1 for sticky footer ───────────────────── */
.page-content {
  flex: 1;
  padding: 2.8rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ── Page Headers ────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.4rem;
  flex-wrap: wrap;
}

.page-kicker {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.32rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.page-kicker::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  box-shadow: var(--glow-b);
}

.page-heading {
  font-family: var(--font-brand);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--tx);
  margin-bottom: 0.35rem;
  line-height: 1.15;
  text-shadow: 0 0 18px rgba(96,165,250,0.15);
}

.page-subheading {
  font-size: 0.95rem;
  color: var(--tx-m);
  line-height: 1.55;
}
.page-subheading strong { color: var(--tx); }
.page-header-actions { margin-top: 0.4rem; }

/* ── Cards ───────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--b1);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.75rem;
  position: relative;
  transition: border-color var(--t), box-shadow var(--t);
  box-shadow: var(--elev-1);
}

.card:hover {
  border-color: var(--b2);
  box-shadow: var(--elev-2), 0 0 0 1px rgba(96,165,250,0.06);
}

.card-header {
  font-family: var(--font-brand);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--b0);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.card-header::before {
  content: '//';
  opacity: 0.55;
  font-family: var(--font-mono);
  letter-spacing: -0.04em;
  font-size: 0.9em;
}

/* ── Forms ───────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.2rem; }

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--tx-m);
  margin-bottom: 0.4rem;
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.6rem 0.95rem;
  background: var(--bg-input);
  border: 1px solid var(--b1);
  border-radius: var(--r-sm);
  color: var(--tx);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--t), box-shadow var(--t), background var(--t);
  outline: none;
  -webkit-appearance: none;
}
.form-control:focus {
  border-color: var(--blue);
  background: rgba(96,165,250,0.04);
  box-shadow: 0 0 0 3px rgba(96,165,250,0.14);
  color: var(--tx);
}
.form-control::placeholder { color: var(--tx-d); }
.form-control:disabled { opacity: 0.45; cursor: not-allowed; }

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2360A5FA' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.95rem center;
  padding-right: 2.6rem;
  cursor: pointer;
}
select.form-control option { background: var(--bg-input); color: var(--tx); }

textarea.form-control {
  resize: vertical;
  min-height: 110px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  border-radius: var(--r-sm);
}

.form-footnote {
  font-size: 0.82rem;
  color: var(--tx-m);
  text-align: center;
  margin-top: 1rem;
}

/* Radio toggles */
.radio-toggle { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.radio-toggle input[type="radio"] { display: none; }
.radio-toggle label {
  padding: 0.38rem 0.9rem;
  border: 1px solid var(--b1);
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--tx-m);
  cursor: pointer;
  transition: all var(--t);
}
.radio-toggle input[type="radio"]:checked + label {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(96,165,250,0.09);
}

input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--blue);
  cursor: pointer;
}

small.text-muted { font-size: 0.78rem; color: var(--tx-m); display: block; margin-top: 0.28rem; }

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--r);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
  position: relative;
}
.btn:disabled, .btn[disabled] { opacity: 0.38; cursor: not-allowed; pointer-events: none; }
.btn-sm { padding: 0.38rem 0.85rem; font-size: 0.78rem; }

.btn-primary {
  background: var(--blue);
  color: #040A14;
  border-color: var(--blue);
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(96,165,250,0.25);
}
.btn-primary:hover {
  background: #7CC4FF;
  border-color: #7CC4FF;
  box-shadow: var(--glow-b), 0 4px 16px rgba(96,165,250,0.30);
  color: #040A14;
  transform: translateY(-1px);
}

.btn-cyan {
  background: transparent;
  color: var(--cyan);
  border-color: rgba(52,211,153,0.45);
}
.btn-cyan:hover {
  background: rgba(52,211,153,0.10);
  border-color: var(--cyan);
  box-shadow: var(--glow-c);
  color: var(--cyan);
}

.btn-amber {
  background: transparent;
  color: var(--amber);
  border-color: rgba(251,191,36,0.45);
}
.btn-amber:hover {
  background: rgba(251,191,36,0.10);
  border-color: var(--amber);
  box-shadow: 0 0 10px rgba(251,191,36,0.50), 0 0 32px rgba(251,191,36,0.12);
  color: var(--amber);
}

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: rgba(248,113,113,0.45);
}
.btn-danger:hover {
  background: rgba(248,113,113,0.10);
  border-color: var(--red);
  box-shadow: var(--glow-r);
  color: var(--red);
}

.btn-magenta {
  background: transparent;
  color: var(--magenta);
  border-color: rgba(232,121,249,0.45);
}
.btn-magenta:hover {
  background: rgba(232,121,249,0.10);
  border-color: var(--magenta);
  color: var(--magenta);
  box-shadow: var(--glow-magenta);
}

.btn-ghost {
  background: transparent;
  color: var(--tx-m);
  border-color: var(--b1);
}
.btn-ghost:hover { color: var(--tx); border-color: var(--b2); background: rgba(96,165,250,0.05); }

.full-width { width: 100%; }

/* ── Utility spacing ─────────────────────────────────────────────── */
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.75rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1.25rem; }
.mt-3 { margin-top: 1.75rem; }

/* ── Utility text ────────────────────────────────────────────────── */
.text-center  { text-align: center; }
.text-green   { color: var(--green)   !important; }
.text-amber-bright { color: var(--amber) !important; }
.text-cyan    { color: var(--cyan)    !important; }
.text-amber   { color: var(--amber)   !important; }
.text-magenta { color: var(--magenta) !important; }
.text-muted   { color: var(--tx-m)    !important; }
.text-dim     { color: var(--tx-d)    !important; }

/* ── Stats Row ───────────────────────────────────────────────────── */
.stats-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}
.stat-item {
  font-family: var(--font-display);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--tx-m);
  text-transform: uppercase;
}
.stat-item strong { color: var(--cyan); font-family: var(--font-brand); font-weight: 800; }

/* ── Status Badges ───────────────────────────────────────────────── */
.status-badge,
.status-pill,
.kind-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.65rem;
  border-radius: var(--r-xl);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  vertical-align: middle;
  white-space: nowrap;
}

.status-badge.status-visible,
.status-badge.status-ready,
.status-badge.status-running,
.status-badge.status-done    { background: rgba(96,165,250,0.14);  color: var(--blue); }
.status-badge.status-hidden,
.status-badge.status-pending { background: rgba(232,240,254,0.07); color: var(--tx-m); }
.status-badge.status-error,
.status-badge.status-failed  { background: rgba(248,113,113,0.14); color: var(--red);  }
.status-badge.status-artifact-generating { background: rgba(251,191,36,0.14); color: var(--amber); }
.status-badge.status-artifact-done       { background: rgba(74,222,128,0.14); color: var(--green); }
.status-badge.status-artifact-failed     { background: rgba(248,113,113,0.14); color: var(--red);   }
.status-badge.status-artifact-pending    { background: rgba(232,240,254,0.07); color: var(--tx-m); }

[class*="status-workspace-"] { background: rgba(232,240,254,0.07); color: var(--tx-m); }
.status-badge.status-workspace-ready,
.status-badge.status-workspace-ok     { background: rgba(96,165,250,0.12); color: var(--blue); }
.status-badge.status-workspace-error  { background: rgba(248,113,113,0.12); color: var(--red);  }
.status-badge.status-workspace-warn   { background: rgba(251,191,36,0.12); color: var(--amber); }

.status-pill.info { background: rgba(52,211,153,0.14); color: var(--cyan); }
.status-pill.warn { background: rgba(251,191,36,0.14); color: var(--amber); }

.kind-badge.team { background: rgba(52,211,153,0.14);  color: var(--cyan); }
.kind-badge.solo { background: rgba(96,165,250,0.14);  color: var(--blue); }

/* ── Auth Shell ──────────────────────────────────────────────────── */
.auth-shell {
  max-width: 420px;
  margin: 4rem auto;
}
.auth-shell.wide { max-width: 520px; }
.auth-panel { padding: 2rem 2.25rem; }

/* ── Challenge Grid & Cards ──────────────────────────────────────── */
.category-section { margin-bottom: 3rem; }

.category-title {
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.category-title::before {
  content: '';
  display: block;
  width: 24px; height: 2px;
  background: var(--blue);
  border-radius: 2px;
  box-shadow: var(--glow-b);
}
.category-title::after {
  content: '';
  display: block;
  flex: 1; height: 1px;
  background: var(--b0);
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.challenge-card {
  display: block;
  background: var(--bg-surface);
  border: 1px solid var(--b1);
  border-left: 3px solid var(--b1);
  border-radius: var(--r-lg);
  padding: 1.15rem 1.3rem;
  color: var(--tx);
  text-decoration: none;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
  box-shadow: var(--elev-1);
}
.challenge-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(96,165,250,0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--t);
  pointer-events: none;
}
.challenge-card:hover {
  border-color: var(--b2);
  border-left-color: var(--blue);
  color: var(--tx);
  transform: translateY(-2px);
  box-shadow: var(--elev-2), 0 0 0 1px rgba(96,165,250,0.08);
}
.challenge-card:hover::before { opacity: 1; }
.challenge-card:hover .challenge-title { color: var(--blue); }

.challenge-card.solved {
  border-left-color: var(--blue);
  background: linear-gradient(120deg, rgba(96,165,250,0.07), var(--bg-surface));
}
.challenge-card.solved .challenge-title { color: var(--blue); }
.challenge-card.solved::after {
  content: '✓';
  position: absolute;
  top: 0.6rem; right: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--blue);
  text-shadow: var(--glow-b);
}

.challenge-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.55rem;
  transition: color var(--t);
  line-height: 1.3;
}

.challenge-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.challenge-points {
  font-family: var(--font-brand);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.challenge-solves { font-size: 0.76rem; color: var(--tx-d); }

/* ── Challenge Detail ────────────────────────────────────────────── */
.challenge-detail { max-width: 860px; }

.challenge-toolbar {
  margin-bottom: 1.3rem;
  font-size: 0.85rem;
}
.challenge-toolbar a { color: var(--tx-m); }
.challenge-toolbar a:hover { color: var(--blue); }

.challenge-desc {
  margin: 1.6rem 0;
  line-height: 1.8;
  font-size: 0.95rem;
  color: var(--tx);
}
.challenge-desc p { margin-bottom: 0.9rem; }
.challenge-desc h1, .challenge-desc h2, .challenge-desc h3 {
  font-family: var(--font-brand);
  color: var(--blue);
  margin: 1.3rem 0 0.55rem;
  letter-spacing: 0.03em;
}
.challenge-desc h1 { font-size: 1.3rem; }
.challenge-desc h2 { font-size: 1.1rem; }
.challenge-desc h3 { font-size: 0.95rem; }
.challenge-desc code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  padding: 0.12em 0.45em;
  border-radius: var(--r-sm);
  color: var(--cyan);
}
.challenge-desc pre {
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-left: 3px solid var(--blue);
  border-radius: var(--r);
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
  margin: 0.9rem 0;
}
.challenge-desc pre code { background: none; border: none; padding: 0; color: var(--tx); }
.challenge-desc ul, .challenge-desc ol {
  padding-left: 1.4rem;
  margin-bottom: 0.9rem;
}
.challenge-desc li { margin-bottom: 0.35rem; }
.challenge-desc blockquote {
  border-left: 3px solid var(--blue);
  padding: 0.55rem 1.1rem;
  background: rgba(96,165,250,0.05);
  margin: 0.9rem 0;
  font-style: italic;
  color: var(--tx-m);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.solved-badge {
  padding: 0.9rem 1.3rem;
  background: rgba(96,165,250,0.09);
  border: 1px solid rgba(96,165,250,0.45);
  border-left: 3px solid var(--blue);
  border-radius: var(--r);
  color: var(--blue);
  font-family: var(--font-brand);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-shadow: var(--glow-b);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  animation: pulse-blue 3s ease-in-out infinite;
}

.flag-form .form-group { margin-bottom: 0.85rem; }

.retry-timer {
  margin-top: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--amber);
  letter-spacing: 0.05em;
}

.file-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.file-list li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.9rem;
  padding: 0.4rem 0.6rem;
  border-radius: var(--r-sm);
  transition: background var(--t);
}
.file-list li:hover { background: var(--bg-elevated); }

/* ── Scoreboard ──────────────────────────────────────────────────── */
.scoreboard-filters {
  display: flex;
  gap: 0.45rem;
  margin-bottom: 1.7rem;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 0.35rem 1rem;
  border: 1px solid var(--b1);
  border-radius: var(--r-xl);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--tx-m);
  background: transparent;
  text-decoration: none;
  transition: all var(--t);
}
.filter-btn:hover { color: var(--blue); border-color: var(--b2); background: rgba(96,165,250,0.06); }
.filter-btn.active { color: var(--blue); border-color: var(--blue); background: rgba(96,165,250,0.09); }

.frozen-banner {
  padding: 0.75rem 1.1rem;
  background: rgba(251,191,36,0.09);
  border: 1px solid rgba(251,191,36,0.35);
  border-left: 3px solid var(--amber);
  border-radius: var(--r);
  color: var(--amber);
  font-family: var(--font-display);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.scoreboard-table-shell { overflow: hidden; border-radius: var(--r-lg); }

.scoreboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.scoreboard-table th {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tx-d);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--b1);
  text-align: left;
  white-space: nowrap;
}
.scoreboard-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--b0);
  vertical-align: middle;
}
.scoreboard-table tbody tr { transition: background var(--t); }
.scoreboard-table tbody tr:hover { background: var(--bg-elevated); }
.scoreboard-table tbody tr:last-child td { border-bottom: none; }

.rank { font-family: var(--font-brand); font-size: 0.82rem; color: var(--tx-d); letter-spacing: 0.04em; font-weight: 700; }
.rank-1 { color: var(--cyan); text-shadow: var(--glow-c); }
.rank-2 { color: var(--blue); text-shadow: var(--glow-b); }
.rank-3 { color: var(--indigo); }
.team-name { font-family: var(--font-display); font-weight: 700; font-size: 0.96rem; color: var(--tx); }
.score { font-family: var(--font-brand); color: var(--cyan); font-size: 0.9rem; letter-spacing: 0.04em; font-weight: 700; }

.leaderboard-team summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}
.leaderboard-team summary::-webkit-details-marker { display: none; }
.leaderboard-arrow {
  width: 6px; height: 6px;
  border-right: 2px solid var(--tx-m);
  border-bottom: 2px solid var(--tx-m);
  transform: rotate(-45deg);
  transition: transform var(--t);
  display: inline-block;
  flex-shrink: 0;
}
.leaderboard-team[open] .leaderboard-arrow { transform: rotate(45deg); }
.leaderboard-members {
  list-style: none;
  padding: 0.5rem 0 0 1.2rem;
  font-size: 0.8rem;
  color: var(--tx-m);
}
.leaderboard-members li::before { content: '▸ '; color: var(--blue); font-size: 0.66rem; }

.score-chart-shell { position: relative; }
.score-chart-svg { width: 100%; height: auto; max-height: 340px; }
.score-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.score-chart-legend-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--tx-m);
}
.score-chart-legend-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Wall of Shame ───────────────────────────────────────────────── */
.wall-of-shame-card { height: fit-content; }
.wall-of-shame-list { display: flex; flex-direction: column; gap: 0.75rem; }
.shame-entry {
  padding: 0.7rem 0.9rem;
  background: rgba(248,113,113,0.05);
  border-left: 2px solid rgba(248,113,113,0.35);
  border-radius: var(--r-sm);
  font-size: 0.84rem;
}
.shame-entry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
}

/* ── Team Grid ───────────────────────────────────────────────────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.member-list { list-style: none; display: flex; flex-direction: column; gap: 0.45rem; }
.member-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.7rem;
  background: var(--bg-elevated);
  border-radius: var(--r-sm);
  border: 1px solid var(--b0);
  transition: border-color var(--t);
}
.member-list li:hover { border-color: var(--b1); }

.member-name {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--tx);
}
.member-role {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.12rem 0.5rem;
  border-radius: var(--r-xl);
}
.member-role.captain { background: rgba(251,191,36,0.14); color: var(--amber); border: 1px solid rgba(251,191,36,0.30); }
.member-role.member  { background: rgba(52,211,153,0.12);  color: var(--cyan);  border: 1px solid rgba(52,211,153,0.25); }

.join-token {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  padding: 0.7rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--b2);
  border-radius: var(--r-sm);
  color: var(--blue);
  cursor: pointer;
  transition: all var(--t);
  word-break: break-all;
  position: relative;
  user-select: all;
}
.join-token:hover {
  background: rgba(96,165,250,0.07);
  box-shadow: var(--glow-b);
}
.join-token::after {
  content: 'CLICK TO COPY';
  position: absolute;
  top: 50%;
  right: 0.9rem;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--blue);
  opacity: 0.45;
}
.join-token.copied {
  border-color: var(--blue);
  box-shadow: var(--glow-b);
}
.join-token.copied::after { content: '✓ COPIED'; opacity: 1; }

.notice-panel {
  border-left: 3px solid var(--amber);
  margin-bottom: 1.4rem;
}

/* ── Instance Cards ──────────────────────────────────────────────── */
.instance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.instance-card {
  background: var(--bg-surface);
  border: 1px solid var(--b1);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--elev-1);
  transition: border-color var(--t), box-shadow var(--t);
}
.instance-card:hover { border-color: var(--b2); box-shadow: var(--elev-2); }

.instance-eyebrow {
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.instance-url {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--tx);
  word-break: break-all;
}

.instance-ttl {
  font-family: var(--font-display);
  font-size: 0.78rem;
  color: var(--tx-m);
  letter-spacing: 0.04em;
}

.instance-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-top: 0.45rem;
}

/* nc command copyable block */
.nc-command {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--b2);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-sm);
  padding: 0.55rem 0.85rem;
  margin-top: 0.25rem;
  cursor: pointer;
  transition: all var(--t);
  position: relative;
}
.nc-command:hover {
  background: rgba(52,211,153,0.06);
  box-shadow: var(--glow-c);
}
.nc-command code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--cyan);
  background: none;
  border: none;
  padding: 0;
  flex: 1;
  user-select: all;
}
.nc-command-hint {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
  opacity: 0.45;
  text-transform: uppercase;
  flex-shrink: 0;
  transition: opacity var(--t);
}
.nc-command:hover .nc-command-hint { opacity: 0.9; }
.nc-command.copied .nc-command-hint { opacity: 1; color: var(--green); }

/* ── Admin Panels ────────────────────────────────────────────────── */
.admin-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(260px, 26vw, 340px);
  gap: 1.75rem;
  margin-bottom: 2rem;
  align-items: stretch;
}

.admin-section-kicker {
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.4rem;
}

.admin-chip-row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}
.admin-chip {
  padding: 0.26rem 0.75rem;
  border-radius: var(--r-xl);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.admin-chip-ok    { background: rgba(96,165,250,0.12); color: var(--blue); border: 1px solid rgba(96,165,250,0.28); }
.admin-chip-warn  { background: rgba(251,191,36,0.12); color: var(--amber); border: 1px solid rgba(251,191,36,0.28); }
.admin-chip-muted { background: rgba(232,240,254,0.06); color: var(--tx-d); border: 1px solid var(--b0); }

.admin-action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 0.55rem;
  align-content: start;
}
.admin-action-form { display: contents; }
.admin-action-grid .btn {
  width: 100%;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.2;
  white-space: normal;
}
/* Freeze toggle is the deck's only state-mutating action — span the row.
   The form is display:contents, so its button is the real grid item. */
.admin-action-grid .admin-action-form .btn { grid-column: 1 / -1; }

.admin-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

/* Semantic 2-column layout for admin dashboard sections (Docker/VPN panes, analytics, etc.) */
.admin-two-col-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.admin-metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.admin-metric-tile {
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.5rem;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: border-color var(--t), box-shadow var(--t);
}
.admin-metric-tile:hover { border-color: var(--b2); box-shadow: var(--elev-2); }

.admin-metric-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--tx-d);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.32rem;
}

.admin-metric-value {
  font-family: var(--font-brand);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  letter-spacing: 0.02em;
}

.admin-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  margin-bottom: 1.75rem;
}

/* ── Error Page ──────────────────────────────────────────────────── */
.error-page {
  text-align: center;
  padding: 8rem 2rem;
  animation: co-in 0.5s var(--t) both;
}
.error-code {
  font-family: var(--font-brand);
  font-size: clamp(5rem, 18vw, 11rem);
  font-weight: 900;
  color: var(--blue);
  text-shadow: var(--glow-b);
  line-height: 1;
  margin-bottom: 1.3rem;
  letter-spacing: 0.04em;
}
.error-message {
  font-size: 1rem;
  color: var(--tx-m);
  margin-bottom: 2.4rem;
  letter-spacing: 0.02em;
}
.glitch { position: relative; }
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  font: inherit;
}
.glitch::before {
  color: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
  transform: translateX(-3px);
  animation: gl-a 4.5s infinite;
}
.glitch::after {
  color: var(--red);
  clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%);
  transform: translateX(3px);
  animation: gl-b 4.5s infinite;
}
@keyframes gl-a {
  0%,88%,100% { transform: translateX(0); opacity: 0; }
  90% { transform: translateX(-3px); opacity: 1; }
  93% { transform: translateX(2px); opacity: 1; }
  96% { opacity: 0; }
}
@keyframes gl-b {
  0%,88%,100% { transform: translateX(0); opacity: 0; }
  91% { transform: translateX(3px); opacity: 1; }
  94% { transform: translateX(-2px); opacity: 1; }
  97% { opacity: 0; }
}

/* ── Empty State ─────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--tx-m);
  font-size: 0.92rem;
  border: 1px dashed var(--b1);
  border-radius: var(--r-lg);
}

/* ── Footer — pinned via flex body ──────────────────────────────── */
.site-footer {
  margin-top: 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--b0);
  background: rgba(6,11,20,0.6);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.site-footer p {
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--tx-d);
}
.site-footer a { color: var(--tx-d); }
.site-footer a:hover { color: var(--blue); text-shadow: none; }
.site-footer .mt-1 { margin-top: 0; }

/* ── Pagination ──────────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.75rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
}

/* ── Import Results ──────────────────────────────────────────────── */
.import-result-item {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--b0);
  font-size: 0.88rem;
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
}
.import-result-item:last-child { border-bottom: none; }
.import-result-item .status { min-width: 64px; flex-shrink: 0; }

/* ── Inline code / pre ───────────────────────────────────────────── */
code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  padding: 0.12em 0.4em;
  border-radius: var(--r-sm);
  color: var(--cyan);
}

pre {
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-left: 3px solid var(--b2);
  border-radius: var(--r);
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  font-size: 0.86rem;
  color: var(--tx);
  font-family: var(--font-mono);
  line-height: 1.65;
}
pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }

/* ── Admin Dashboard Sub-components ─────────────────────────────── */
.admin-hero-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.admin-hero-side {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.admin-hero-side .admin-action-grid { flex: 1; }
.admin-metric-panel  { }
.admin-ops-card      { }
.admin-surface-card  { }

.admin-card-intro {
  font-size: 0.88rem;
  color: var(--tx-m);
  line-height: 1.65;
  margin-bottom: 1.1rem;
}

.admin-inline-meta {
  font-family: var(--font-display);
  font-size: 0.76rem;
  color: var(--tx-d);
  letter-spacing: 0.04em;
}

.admin-action-row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.admin-ops-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.admin-ops-metric {
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-radius: var(--r-lg);
  padding: 1rem 1.2rem;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.admin-ops-label {
  font-family: var(--font-display);
  font-size: 0.70rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--tx-d);
  margin-bottom: 0.35rem;
}
.admin-ops-value {
  font-family: var(--font-brand);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1.1;
}

.admin-severity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.admin-severity-tile {
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-radius: var(--r);
  padding: 0.85rem 1rem;
  text-align: center;
  min-height: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.admin-severity-label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tx-d);
  margin-bottom: 0.35rem;
}
.admin-severity-value {
  font-family: var(--font-brand);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 0.6rem;
}

/* ── VPN Key Section ─────────────────────────────────────────────── */
.vpn-key-section { margin-top: 1.5rem; }

.vpn-key-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-top: 0.75rem;
}

.vpn-key-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--b1);
  border-radius: var(--r);
  gap: 1rem;
  flex-wrap: wrap;
  transition: border-color var(--t);
}
.vpn-key-item:hover { border-color: var(--b2); }

.vpn-key-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
}

.vpn-key-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--tx);
}

.vpn-key-ip {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  background: rgba(52,211,153,0.10);
  padding: 0.15rem 0.55rem;
  border-radius: var(--r-xl);
}

.vpn-key-challenge {
  font-family: var(--font-display);
  font-size: 0.74rem;
  color: var(--tx-m);
  letter-spacing: 0.04em;
}

.vpn-empty {
  padding: 1.5rem;
  text-align: center;
  color: var(--tx-m);
  font-size: 0.88rem;
  background: var(--bg-elevated);
  border: 1px dashed var(--b1);
  border-radius: var(--r);
}

/* ── Auth supplementary ──────────────────────────────────────────── */
.form-actions { margin-top: 0.55rem; }

.auth-links {
  text-align: center;
  margin-top: 1.1rem;
  font-size: 0.84rem;
}
.auth-links a { color: var(--tx-m); }
.auth-links a:hover { color: var(--blue); }

.form-error {
  display: block;
  font-size: 0.78rem;
  color: var(--red);
  margin-top: 0.3rem;
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

/* ── Reduced motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1200px) {
  .admin-panel-grid { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 1.5rem; }
  .page-content { padding: 2.2rem 1.5rem; }
}

@media (max-width: 960px) {
  .admin-hero            { grid-template-columns: 1fr; }
  .admin-section-grid    { grid-template-columns: 1fr; }
  .admin-panel-grid      { grid-template-columns: 1fr; }
  .admin-metric-grid     { grid-template-columns: repeat(3, 1fr); }
  .admin-ops-metrics     { grid-template-columns: repeat(2, 1fr); }
  .admin-severity-grid   { grid-template-columns: repeat(3, 1fr); }
  .admin-form-grid       { grid-template-columns: 1fr; }
  .team-grid             { grid-template-columns: 1fr; }
  .admin-two-col-grid    { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-bar { position: relative; }

  .nav-links {
    display: none;
    position: absolute;
    top: 62px;
    left: 0; right: 0;
    background: rgba(6,11,20,0.98);
    border-bottom: 1px solid var(--b1);
    flex-direction: column;
    padding: 0.7rem;
    gap: 0.2rem;
    z-index: 200;
    animation: co-in 0.2s var(--t) both;
  }
  .nav-links.open { display: flex; }
  .nav-toggle     { display: flex; }

  .nav-links li a,
  .nav-inline-btn { padding: 0.6rem 0.9rem; width: 100%; justify-content: flex-start; }
  .nav-links li a::after { display: none; }

  .page-content      { padding: 1.75rem 1.1rem; }
  .container         { padding: 0 1.1rem; }
  .challenge-grid    { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .admin-panel-grid  { grid-template-columns: 1fr; }
  .admin-metric-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-ops-metrics { grid-template-columns: 1fr 1fr; }
  .admin-form-grid   { grid-template-columns: 1fr; }
  .auth-shell        { margin: 2.5rem auto; }
  .card              { padding: 1.2rem 1.3rem; }
}

@media (max-width: 480px) {
  .challenge-grid        { grid-template-columns: 1fr; }
  .admin-metric-grid     { grid-template-columns: 1fr 1fr; }
  .admin-ops-metrics     { grid-template-columns: 1fr 1fr; }
  .admin-severity-grid   { grid-template-columns: 1fr; }
  .instance-grid         { grid-template-columns: 1fr; }
  .stats-row             { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

/* ════════════════════════════════════════════════════════════════════
   ADMIN SHELL — dedicated, responsive console layout (templates/admin/_shell.html)
   A sticky sidebar + fluid main that scales from phone to ultrawide. The main
   column uses minmax(0,1fr) so wide data tables scroll inside it instead of
   blowing out the grid — the single most common admin-UI scaling bug.
   ════════════════════════════════════════════════════════════════════ */
:root { --admin-sidebar-w: 250px; --admin-topbar-h: 64px; --nav-h: 62px; }

/* Let admin pages span full width (escape the 1400px reading cap). */
body.admin-mode .page-content { max-width: none; padding: 0; }
body.admin-drawer-open { overflow: hidden; }

.admin-layout {
  display: grid;
  grid-template-columns: var(--admin-sidebar-w) minmax(0, 1fr);
  align-items: start;
  min-height: calc(100vh - var(--nav-h));
}

/* ── Sidebar ───────────────────────────────────────────────────────── */
.admin-sidebar {
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.4rem 0.9rem 1rem;
  background: linear-gradient(180deg, var(--bg-surface), var(--bg-base));
  border-right: 1px solid var(--b1);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.admin-sidebar-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.2rem 0.55rem 1.1rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--b0);
}
.admin-sidebar-mark {
  flex: none;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: var(--r);
  color: var(--blue);
  background: rgba(96,165,250,0.10);
  border: 1px solid var(--b1);
  box-shadow: var(--glow-b);
}
.admin-sidebar-titles { display: flex; flex-direction: column; min-width: 0; }
.admin-sidebar-title {
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--tx);
}
.admin-sidebar-sub {
  font-size: 0.72rem;
  color: var(--tx-d);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.admin-nav { display: flex; flex-direction: column; gap: 0.12rem; flex: 1 1 auto; }
.admin-nav-group {
  font-family: var(--font-display);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tx-d);
  margin: 1rem 0.7rem 0.35rem;
}
.admin-nav-group:first-child { margin-top: 0.2rem; }
.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.58rem 0.7rem;
  border-radius: var(--r);
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--tx-m);
  border: 1px solid transparent;
  position: relative;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.admin-nav-link i { width: 1.05rem; text-align: center; font-size: 0.92rem; color: var(--tx-d); transition: color var(--t); }
.admin-nav-link:hover { background: var(--bg-hover); color: var(--tx); }
.admin-nav-link:hover i { color: var(--blue); }
.admin-nav-link.active {
  background: rgba(96,165,250,0.12);
  color: var(--tx);
  border-color: var(--b1);
}
.admin-nav-link.active i { color: var(--blue); }
.admin-nav-link.active::before {
  content: "";
  position: absolute; left: -0.9rem; top: 50%; transform: translateY(-50%);
  width: 3px; height: 1.3rem; border-radius: 0 3px 3px 0;
  background: var(--blue); box-shadow: var(--glow-b);
}
.admin-nav-exit {
  display: flex; align-items: center; gap: 0.55rem;
  margin-top: 0.6rem; padding: 0.6rem 0.7rem;
  border-top: 1px solid var(--b0);
  font-family: var(--font-display); font-size: 0.8rem; font-weight: 600;
  color: var(--tx-d); transition: color var(--t);
}
.admin-nav-exit:hover { color: var(--cyan); }

/* ── Main column ───────────────────────────────────────────────────── */
.admin-main { min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
  position: sticky; top: var(--nav-h); z-index: 40;
  display: flex; align-items: center; gap: 1rem;
  padding: 1.1rem 2rem;
  background: rgba(10,17,32,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--b1);
}
.admin-topbar-titles { min-width: 0; margin-right: auto; }
.admin-topbar-kicker {
  font-family: var(--font-display); font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--blue);
}
.admin-topbar-title {
  font-family: var(--font-brand); font-weight: 800; font-size: 1.4rem;
  line-height: 1.15; color: var(--tx);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.admin-topbar-actions { display: flex; align-items: center; gap: 0.6rem; flex: none; }
.admin-drawer-toggle {
  display: none;
  width: 40px; height: 40px; flex: none;
  align-items: center; justify-content: center;
  background: var(--bg-elevated); color: var(--tx-m);
  border: 1px solid var(--b1); border-radius: var(--r);
  cursor: pointer; transition: border-color var(--t), color var(--t);
}
.admin-drawer-toggle:hover { border-color: var(--b2); color: var(--blue); }
.admin-content { padding: 2rem; flex: 1 1 auto; }
.admin-content > .page-heading:first-child,
.admin-content > .page-heading { margin-top: 0; }

.admin-sidebar-scrim {
  display: none;
  position: fixed; inset: var(--nav-h) 0 0 0; z-index: 45;
  background: rgba(6,11,20,0.62); backdrop-filter: blur(2px);
}

/* ── Fluid grids: reflow smoothly at every width (the core scaling fix) ── */
.admin-panel-grid   { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.admin-metric-grid  { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.admin-two-col-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.admin-section-grid { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }

/* ── Tables: scroll inside the column instead of overflowing the layout ── */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--b1);
  border-radius: var(--r-lg);
  background: var(--bg-surface);
  -webkit-overflow-scrolling: touch;
}
.table-scroll .scoreboard-table { font-size: 0.86rem; }
.table-scroll .scoreboard-table th { position: sticky; top: 0; background: var(--bg-surface); z-index: 1; }

/* ── Responsive: collapse the sidebar into an off-canvas drawer ──────── */
@media (max-width: 1024px) {
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar {
    position: fixed; top: var(--nav-h); left: 0; z-index: 50;
    width: min(86vw, 320px);
    transform: translateX(-104%);
    transition: transform 240ms cubic-bezier(0.2, 0, 0, 1);
    box-shadow: var(--elev-3);
  }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-sidebar-scrim { display: block; }
  .admin-drawer-toggle { display: inline-flex; }
}
@media (max-width: 768px) {
  .admin-topbar  { padding: 0.9rem 1.1rem; }
  .admin-content { padding: 1.4rem 1.1rem; }
  .admin-topbar-title { font-size: 1.2rem; }
}