/* ==========================================================================
   Cybersecurity Quiz Arena — Design System
   Palette carried from apisecurityguide.com (dark forest-green / gold)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@600;700;800&family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  --bg:            #060f0a;
  --bg-alt:        #0a1811;
  --panel:         #0d2318;
  --panel-2:       rgba(18,46,32,0.62);
  --glass-border:  rgba(201,162,39,0.18);
  --forest:        #0a5c36;
  --forest-deep:   #06331d;
  --forest-bright: #14884f;
  --gold:          #c9a227;
  --gold-bright:   #e8c34a;
  --gold-dim:      rgba(201,162,39,0.35);
  --teal:          #2dd4bf;
  --danger:        #e2543f;
  --text:          #eaf3ec;
  --text-dim:      #9db8a9;
  --text-faint:    #5f7a6a;

  --font-display: 'Orbitron', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-glow: 0 0 0 1px rgba(201,162,39,0.12), 0 20px 60px -20px rgba(0,0,0,0.7);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a{ color: inherit; text-decoration: none; }
button{ font-family: inherit; }
ul{ margin: 0; padding: 0; list-style: none; }
img{ max-width: 100%; display: block; }

::selection{ background: var(--gold-dim); color: var(--gold-bright); }

/* Focus visibility — accessibility floor */
:focus-visible{
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------------------------------------------------------------------- */
/* Ambient background — hex grid + slow radial glow                       */
/* ---------------------------------------------------------------------- */
.bg-layer{
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(ellipse 900px 500px at 18% -8%, rgba(10,92,54,0.45), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(201,162,39,0.10), transparent 55%),
    radial-gradient(ellipse 900px 700px at 50% 120%, rgba(10,92,54,0.30), transparent 60%),
    var(--bg);
}
.bg-grid{
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.5;
  background-image:
    linear-gradient(rgba(201,162,39,0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,162,39,0.055) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
}
.bg-scanline{
  position: fixed; left: 0; right: 0; height: 140px; z-index: -1; pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(45,212,191,0.05), transparent);
  animation: scan-drift 9s linear infinite;
}
@keyframes scan-drift{
  0%{ top: -140px; }
  100%{ top: 100vh; }
}

/* ---------------------------------------------------------------------- */
/* Layout shell                                                           */
/* ---------------------------------------------------------------------- */
.wrap{ max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.screen{ display: none; }
.screen.active{ display: block; }

/* ---------------------------------------------------------------------- */
/* Nav                                                                    */
/* ---------------------------------------------------------------------- */
.nav{
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(6,15,10,0.72);
  border-bottom: 1px solid var(--glass-border);
}
.nav-inner{ display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; max-width: 1240px; margin: 0 auto; gap: 16px; }
.brand{ display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; letter-spacing: 0.5px; font-size: 1.05rem; }
.brand-mark{ width: 34px; height: 34px; flex-shrink: 0; }
.brand small{ display:block; font-family: var(--font-body); font-weight: 500; font-size: 0.62rem; color: var(--text-faint); letter-spacing: 1.5px; text-transform: uppercase; margin-top: 2px;}

.nav-stats{ display: flex; align-items: center; gap: 18px; font-family: var(--font-mono); font-size: 0.82rem; }
.nav-stat{ display:flex; align-items:center; gap:6px; color: var(--text-dim); }
.nav-stat b{ color: var(--gold-bright); font-weight: 700; }
.nav-stat .dot{ width:7px; height:7px; border-radius:50%; }

.btn-ghost-nav{
  border: 1px solid var(--glass-border); background: rgba(201,162,39,0.06);
  color: var(--gold-bright); padding: 8px 16px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: all .2s ease;
}
.btn-ghost-nav:hover{ background: rgba(201,162,39,0.14); border-color: var(--gold); }

@media (max-width: 720px){
  .nav-stats{ display:none; }
}

/* ---------------------------------------------------------------------- */
/* Hero                                                                   */
/* ---------------------------------------------------------------------- */
.hero{ padding: 64px 0 40px; }
.hero-grid{ display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
@media (max-width: 960px){ .hero-grid{ grid-template-columns: 1fr; } }

.eyebrow{
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--teal); background: rgba(45,212,191,0.08); border: 1px solid rgba(45,212,191,0.25);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 18px;
}
.eyebrow .pulse{ width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 0 rgba(45,212,191,0.6); animation: pulse 1.8s infinite; }
@keyframes pulse{ 0%{ box-shadow: 0 0 0 0 rgba(45,212,191,0.55);} 70%{ box-shadow: 0 0 0 8px rgba(45,212,191,0);} 100%{ box-shadow: 0 0 0 0 rgba(45,212,191,0);} }

.hero h1{
  font-family: var(--font-display); font-weight: 800; letter-spacing: 0.2px;
  font-size: clamp(2.1rem, 4.6vw, 3.4rem); line-height: 1.12; margin: 0 0 18px;
}
.hero h1 .accent{ color: var(--gold-bright); }
.hero p.lead{ color: var(--text-dim); font-size: 1.08rem; max-width: 46ch; margin: 0 0 28px; }

.hero-ctas{ display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.btn{
  font-family: var(--font-body); font-weight: 700; font-size: 0.95rem; cursor: pointer;
  border-radius: 12px; padding: 14px 26px; border: 1px solid transparent; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary{ background: linear-gradient(135deg, var(--gold), var(--gold-bright)); color: #14210f; box-shadow: 0 10px 30px -10px rgba(201,162,39,0.55); }
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 16px 34px -12px rgba(201,162,39,0.7); }
.btn-secondary{ background: rgba(255,255,255,0.03); border-color: var(--glass-border); color: var(--text); }
.btn-secondary:hover{ border-color: var(--gold-dim); background: rgba(201,162,39,0.06); }
.btn:active{ transform: translateY(0); }

.hero-trust{ display: flex; gap: 22px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }
.hero-trust span{ display: flex; align-items: center; gap: 7px; }
.hero-trust svg{ width: 15px; height: 15px; color: var(--forest-bright); }

/* SOC console — signature element */
.console{
  background: linear-gradient(180deg, rgba(13,35,24,0.9), rgba(8,20,14,0.94));
  border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow); overflow: hidden; position: relative;
}
.console-bar{
  display: flex; align-items: center; justify-content: space-between; padding: 10px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.05); background: rgba(0,0,0,0.18);
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint); letter-spacing: 0.5px;
}
.console-dots{ display: flex; gap: 6px; }
.console-dots span{ width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,0.12); }
.console-dots span:nth-child(1){ background: #e2543f; }
.console-dots span:nth-child(2){ background: #c9a227; }
.console-dots span:nth-child(3){ background: #2dd4bf; }
.console-body{ padding: 18px 18px 20px; font-family: var(--font-mono); font-size: 0.78rem; min-height: 230px; }
.console-line{ display: flex; gap: 10px; padding: 5px 0; opacity: 0; animation: line-in .4s ease forwards; color: var(--text-dim); }
.console-line .tag{ flex-shrink: 0; font-weight: 700; }
.tag.ok{ color: var(--forest-bright); } .tag.warn{ color: var(--gold-bright); } .tag.info{ color: var(--teal); } .tag.crit{ color: var(--danger); }
@keyframes line-in{ from{ opacity: 0; transform: translateY(4px);} to{ opacity: 1; transform: translateY(0);} }
.console-cursor{ display: inline-block; width: 7px; height: 14px; background: var(--gold-bright); animation: blink 1s step-end infinite; vertical-align: -2px; }
@keyframes blink{ 50%{ opacity: 0; } }
.console-footer{ display:flex; justify-content: space-between; padding: 10px 16px; border-top: 1px solid rgba(255,255,255,0.05); font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint); }

/* ---------------------------------------------------------------------- */
/* Stat strip                                                             */
/* ---------------------------------------------------------------------- */
.stat-strip{ display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin: 8px 0 48px; }
@media (max-width: 800px){ .stat-strip{ grid-template-columns: repeat(2,1fr); } }
.stat-card{
  background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md);
  padding: 18px 20px; backdrop-filter: blur(10px);
}
.stat-card .num{ font-family: var(--font-display); font-size: 1.7rem; color: var(--gold-bright); font-weight: 700; }
.stat-card .lbl{ font-size: 0.78rem; color: var(--text-dim); margin-top: 4px; }

/* ---------------------------------------------------------------------- */
/* Section headers                                                        */
/* ---------------------------------------------------------------------- */
.section-head{ display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin: 60px 0 22px; flex-wrap: wrap; }
.section-head h2{ font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin: 0; }
.section-head p{ color: var(--text-dim); margin: 6px 0 0; font-size: 0.92rem; max-width: 60ch; }
.section-eyebrow{ font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--forest-bright); margin-bottom: 6px; display:block; }

/* ---------------------------------------------------------------------- */
/* Mode selector                                                          */
/* ---------------------------------------------------------------------- */
.mode-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 900px){ .mode-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .mode-grid{ grid-template-columns: 1fr; } }
.mode-card{
  background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md);
  padding: 20px; cursor: pointer; text-align: left; transition: all .2s ease; position: relative; overflow: hidden;
}
.mode-card:hover{ border-color: var(--gold-dim); transform: translateY(-3px); box-shadow: 0 14px 30px -18px rgba(201,162,39,0.5); }
.mode-card.selected{ border-color: var(--gold); background: linear-gradient(180deg, rgba(201,162,39,0.1), var(--panel-2)); }
.mode-card .icon{ width: 34px; height: 34px; color: var(--gold-bright); margin-bottom: 12px; }
.mode-card h3{ font-size: 1rem; margin: 0 0 6px; font-family: var(--font-body); font-weight: 700; }
.mode-card p{ font-size: 0.8rem; color: var(--text-dim); margin: 0; }
.mode-card .badge{ position: absolute; top: 14px; right: 14px; font-family: var(--font-mono); font-size: 0.62rem; color: var(--teal); background: rgba(45,212,191,0.1); border: 1px solid rgba(45,212,191,0.25); padding: 3px 8px; border-radius: 999px; }

/* ---------------------------------------------------------------------- */
/* Category grid                                                          */
/* ---------------------------------------------------------------------- */
.cat-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 1020px){ .cat-grid{ grid-template-columns: repeat(3,1fr); } }
@media (max-width: 720px){ .cat-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 460px){ .cat-grid{ grid-template-columns: 1fr; } }

.cat-card{
  background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md);
  padding: 16px; cursor: pointer; transition: all .18s ease; text-align: left; display: flex; flex-direction: column; gap: 10px;
}
.cat-card:hover{ border-color: var(--gold-dim); background: rgba(201,162,39,0.05); transform: translateY(-2px); }
.cat-card .top{ display: flex; align-items: center; justify-content: space-between; }
.cat-card .icon-wrap{ width: 38px; height: 38px; border-radius: 10px; background: rgba(10,92,54,0.45); border: 1px solid rgba(20,136,79,0.4); display: flex; align-items: center; justify-content: center; }
.cat-card .icon-wrap svg{ width: 20px; height: 20px; color: var(--forest-bright); }
.cat-card .count{ font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint); }
.cat-card h4{ margin: 0; font-size: 0.95rem; font-weight: 700; }
.cat-card .blurb{ font-size: 0.76rem; color: var(--text-dim); margin: 0; line-height: 1.4; }

/* ---------------------------------------------------------------------- */
/* Quiz screen                                                            */
/* ---------------------------------------------------------------------- */
.quiz-shell{ max-width: 760px; margin: 40px auto 80px; }
.quiz-top{ display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; gap: 16px; flex-wrap: wrap; }
.quiz-meta{ font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-dim); }
.quiz-meta b{ color: var(--gold-bright); }

.progress-track{ height: 6px; border-radius: 999px; background: rgba(255,255,255,0.06); overflow: hidden; margin-bottom: 26px; }
.progress-fill{ height: 100%; background: linear-gradient(90deg, var(--forest-bright), var(--gold)); transition: width .35s ease; }

.timer-ring{ position: relative; width: 62px; height: 62px; flex-shrink: 0; }
.timer-ring svg{ transform: rotate(-90deg); width: 62px; height: 62px; }
.timer-ring circle{ fill: none; stroke-width: 6; }
.timer-ring .bg{ stroke: rgba(255,255,255,0.08); }
.timer-ring .fg{ stroke: var(--teal); stroke-linecap: round; transition: stroke-dashoffset 1s linear, stroke .3s ease; }
.timer-ring .fg.warn{ stroke: var(--danger); }
.timer-ring .num{ position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-weight: 700; font-size: 0.95rem; }

.q-card{
  background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  padding: 30px; box-shadow: var(--shadow-glow);
}
.q-card .q-cat{ font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1.3px; color: var(--teal); margin-bottom: 10px; display:block; }
.q-card h3{ font-size: 1.22rem; line-height: 1.45; margin: 0 0 24px; font-weight: 700; }

.opt-list{ display: flex; flex-direction: column; gap: 12px; }
.opt{
  display: flex; align-items: center; gap: 14px; padding: 14px 16px; border-radius: 12px;
  border: 1px solid var(--glass-border); background: rgba(255,255,255,0.02); cursor: pointer; text-align: left;
  font-size: 0.94rem; color: var(--text); transition: all .15s ease;
}
.opt:hover{ border-color: var(--gold-dim); background: rgba(201,162,39,0.05); }
.opt .letter{ width: 26px; height: 26px; border-radius: 8px; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 0.76rem; flex-shrink: 0; font-weight: 700; }
.opt.correct{ border-color: var(--forest-bright); background: rgba(20,136,79,0.14); }
.opt.correct .letter{ background: var(--forest-bright); color: #06331d; }
.opt.wrong{ border-color: var(--danger); background: rgba(226,84,63,0.12); }
.opt.wrong .letter{ background: var(--danger); color: #2c0b07; }
.opt:disabled{ cursor: default; }

.explain{
  margin-top: 20px; padding: 14px 16px; border-radius: 12px; background: rgba(45,212,191,0.06);
  border: 1px solid rgba(45,212,191,0.22); font-size: 0.85rem; color: var(--text-dim); display: none;
}
.explain.show{ display: block; }
.explain b{ color: var(--teal); }

.q-actions{ display: flex; justify-content: flex-end; margin-top: 22px; }

/* ---------------------------------------------------------------------- */
/* Results                                                                */
/* ---------------------------------------------------------------------- */
.results-shell{ max-width: 640px; margin: 50px auto 90px; text-align: center; }
.result-ring{ width: 170px; height: 170px; margin: 0 auto 22px; position: relative; }
.result-ring svg{ transform: rotate(-90deg); width: 170px; height: 170px; }
.result-ring circle{ fill: none; stroke-width: 10; }
.result-ring .bg{ stroke: rgba(255,255,255,0.07); }
.result-ring .fg{ stroke: url(#ringGrad); stroke-linecap: round; }
.result-ring .pct{ position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.result-ring .pct b{ font-family: var(--font-display); font-size: 2.1rem; color: var(--gold-bright); }
.result-ring .pct span{ font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 1px; }

.results-shell h2{ font-family: var(--font-display); font-size: 1.6rem; margin: 0 0 8px; }
.results-shell p.sub{ color: var(--text-dim); margin: 0 0 28px; }

.result-stats{ display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-bottom: 30px; }
.result-stats .card{ background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 16px; }
.result-stats .card .v{ font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem; color: var(--gold-bright); }
.result-stats .card .l{ font-size: 0.72rem; color: var(--text-faint); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.6px; }

.result-actions{ display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------------------------------------------------------------------- */
/* Leaderboard                                                            */
/* ---------------------------------------------------------------------- */
.lb-table{ width: 100%; border-collapse: collapse; background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md); overflow: hidden; }
.lb-table th{ text-align: left; font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-faint); padding: 14px 16px; border-bottom: 1px solid var(--glass-border); }
.lb-table td{ padding: 13px 16px; border-bottom: 1px solid rgba(255,255,255,0.04); font-size: 0.88rem; }
.lb-table tr:last-child td{ border-bottom: none; }
.lb-table tr.you{ background: rgba(201,162,39,0.07); }
.lb-rank{ font-family: var(--font-mono); font-weight: 700; }
.lb-rank.gold{ color: #e8c34a; } .lb-rank.silver{ color: #cbd5d1; } .lb-rank.bronze{ color: #d68a4c; }

/* ---------------------------------------------------------------------- */
/* Badges / achievements                                                  */
/* ---------------------------------------------------------------------- */
.badge-grid{ display: grid; grid-template-columns: repeat(6,1fr); gap: 12px; }
@media (max-width: 900px){ .badge-grid{ grid-template-columns: repeat(3,1fr); } }
@media (max-width: 500px){ .badge-grid{ grid-template-columns: repeat(2,1fr); } }
.badge-item{ background: var(--panel-2); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 16px 10px; text-align: center; opacity: 0.35; filter: grayscale(1); transition: all .2s ease; }
.badge-item.earned{ opacity: 1; filter: none; border-color: var(--gold-dim); }
.badge-item .glyph{ font-size: 1.6rem; margin-bottom: 6px; }
.badge-item .name{ font-size: 0.7rem; color: var(--text-dim); font-weight: 600; }

/* ---------------------------------------------------------------------- */
/* Toasts (XP / achievement popups)                                       */
/* ---------------------------------------------------------------------- */
.toast-stack{ position: fixed; top: 84px; right: 20px; z-index: 200; display: flex; flex-direction: column; gap: 10px; }
.toast{
  background: linear-gradient(135deg, rgba(10,92,54,0.95), rgba(6,20,14,0.95)); border: 1px solid var(--gold-dim);
  border-radius: 12px; padding: 12px 18px; font-size: 0.85rem; display: flex; align-items: center; gap: 10px;
  box-shadow: 0 14px 34px -14px rgba(0,0,0,0.6); animation: toast-in .3s ease, toast-out .3s ease 2.7s forwards;
  font-family: var(--font-mono);
}
.toast b{ color: var(--gold-bright); }
@keyframes toast-in{ from{ opacity:0; transform: translateX(30px);} to{ opacity:1; transform: translateX(0);} }
@keyframes toast-out{ to{ opacity:0; transform: translateX(30px);} }

/* ---------------------------------------------------------------------- */
/* Ad slots — clearly marked, drop AdSense <ins> tags inside              */
/* ---------------------------------------------------------------------- */
.ad-slot{
  border: 1px dashed rgba(201,162,39,0.3); border-radius: var(--radius-md); background: rgba(255,255,255,0.015);
  display: flex; align-items: center; justify-content: center; min-height: 100px; margin: 44px 0;
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 1px;
}

/* ---------------------------------------------------------------------- */
/* Footer                                                                 */
/* ---------------------------------------------------------------------- */
footer{ border-top: 1px solid var(--glass-border); margin-top: 80px; padding: 40px 0 60px; }
.footer-inner{ display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-inner p{ color: var(--text-faint); font-size: 0.82rem; margin: 0; }
.footer-links{ display: flex; gap: 18px; }
.footer-links a{ color: var(--text-dim); font-size: 0.82rem; }
.footer-links a:hover{ color: var(--gold-bright); }

/* ---------------------------------------------------------------------- */
/* Misc utility                                                           */
/* ---------------------------------------------------------------------- */
.text-center{ text-align: center; }
.mono{ font-family: var(--font-mono); }
.hidden{ display: none !important; }

/* Modal (certificate) */
.modal-overlay{ position: fixed; inset: 0; background: rgba(2,8,5,0.78); backdrop-filter: blur(6px); z-index: 300; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-card{ background: var(--bg-alt); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); max-width: 560px; width: 100%; padding: 26px; box-shadow: var(--shadow-glow); text-align: center; }
.modal-card h3{ font-family: var(--font-display); margin: 4px 0 6px; }
.modal-card p{ color: var(--text-dim); font-size: 0.88rem; margin: 0 0 18px; }
.modal-actions{ display: flex; gap: 10px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.modal-close{ position: absolute; top: 16px; right: 16px; background: none; border: none; color: var(--text-faint); font-size: 1.3rem; cursor: pointer; }
.modal-card{ position: relative; }

#certCanvas{ width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--glass-border); }