/* ============================================
   CTF ELITE - PROFESSIONAL HACKER/CYBER THEME
   Glassmorphism + Particle Network + Glitch FX
   Fully responsive: mobile, tablet, desktop
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #0e0e16;
  --bg-card: rgba(18,18,28,0.6);
  --bg-input: rgba(10,10,18,0.8);
  --bg-hover: rgba(24,24,38,0.5);
  --bg-glass: rgba(255,255,255,0.03);

  --accent: #00ff41;
  --accent-dim: #00cc33;
  --accent-glow: rgba(0,255,65,0.15);
  --accent-subtle: rgba(0,255,65,0.05);
  --accent-shadow: 0 0 30px rgba(0,255,65,0.12);

  --red: #ff2e4d;
  --red-dim: #cc2540;
  --red-glow: rgba(255,46,77,0.12);

  --cyan: #00d4ff;
  --cyan-glow: rgba(0,212,255,0.12);
  --orange: #ff8c00;
  --yellow: #ffd700;

  --text-primary: #c8c8d0;
  --text-secondary: #6e6e7a;
  --text-muted: #3e3e48;

  --border: rgba(255,255,255,0.06);
  --border-accent: rgba(0,255,65,0.12);
  --border-glow: rgba(0,255,65,0.2);

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

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 6px;
  --radius-lg: 10px;

  --glass-blur: blur(20px);
  --glass-border: 1px solid rgba(255,255,255,0.06);
  --glass-bg: rgba(18,18,28,0.55);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(0,255,65,0.015) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0,212,255,0.01) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(80,40,120,0.015) 0%, transparent 50%);
}

::selection { background: var(--accent); color: #000; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); border-radius: 4px; }

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--cyan); }

img { max-width: 100%; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ============================
   GLOBAL BACKGROUND - PARTICLES
   ============================ */
#globalBg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

#globalBg canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Subtle dot grid overlay */
.cyber-grid {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(0,255,65,0.06) 0.5px, transparent 0.5px);
  background-size: 48px 48px;
  opacity: 0.15;
}

.floating-elements {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  display: none;
}

.main-content {
  position: relative;
  z-index: 5;
}

/* Enhanced scanline overlay */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 9998;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.015) 2px,
      rgba(0,0,0,0.015) 4px
    ),
    linear-gradient(
      180deg,
      rgba(0,255,65,0.008) 0%,
      transparent 30%,
      transparent 70%,
      rgba(0,212,255,0.005) 100%
    );
}

/* ============================
   KEYFRAME ANIMATIONS
   ============================ */
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
@keyframes slideInRight { from{transform:translateX(30px);opacity:0} to{transform:translateX(0);opacity:1} }
@keyframes typeCursor { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes pulseGlow { 0%,100%{opacity:0.4} 50%{opacity:1} }
@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 1px); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, -1px); }
  80% { transform: translate(1px, 1px); }
  100% { transform: translate(0); }
}
@keyframes glitchClip {
  0% { clip-path: inset(40% 0 61% 0); }
  20% { clip-path: inset(92% 0 1% 0); }
  40% { clip-path: inset(43% 0 1% 0); }
  60% { clip-path: inset(25% 0 58% 0); }
  80% { clip-path: inset(54% 0 7% 0); }
  100% { clip-path: inset(58% 0 43% 0); }
}
@keyframes btnPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,255,65,0.3); }
  50% { box-shadow: 0 0 0 6px rgba(0,255,65,0); }
}
@keyframes logoFlicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.6; }
  94% { opacity: 1; }
  96% { opacity: 0.8; }
  97% { opacity: 1; }
}
@keyframes borderGlow {
  0%, 100% { border-color: rgba(0,255,65,0.08); }
  50% { border-color: rgba(0,255,65,0.2); }
}
@keyframes solvedCheck {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ============================
   NAVBAR - GLASS EFFECT
   ============================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10000;
  background: rgba(10,10,15,0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0,255,65,0.06);
  height: 56px;
  box-shadow: 0 1px 0 0 rgba(0,255,65,0.04);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 3px;
  text-transform: uppercase;
  animation: logoFlicker 6s infinite;
}

.nav-logo i {
  color: var(--accent);
  font-size: 1rem;
  filter: drop-shadow(0 0 4px rgba(0,255,65,0.4));
}

.nav-logo .accent {
  color: var(--accent);
  text-shadow: 0 0 20px rgba(0,255,65,0.3);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 6px 12px;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: rgba(0,255,65,0.04);
  text-shadow: 0 0 8px rgba(0,255,65,0.2);
}

.nav-link i { font-size: 0.72rem; }

.nav-login {
  color: var(--accent);
  border-color: var(--border-accent);
}

.nav-login:hover {
  background: rgba(0,255,65,0.04);
  box-shadow: none;
}

.nav-logout { color: var(--text-muted); }
.nav-logout:hover { color: var(--red); border-color: rgba(255,46,77,0.15); background: var(--red-glow); }

.admin-link {
  color: var(--orange);
  border-color: rgba(255,140,0,0.15);
}

.admin-link:hover {
  color: var(--orange);
  background: rgba(255,140,0,0.05);
}

/* Nav dropdown */
.nav-dropdown { position: relative; }

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 200px;
  background: rgba(14,14,22,0.9);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  padding: 6px 0;
  margin-top: 8px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.6), 0 0 20px rgba(0,255,65,0.03);
  z-index: 10001;
}

.nav-dropdown:hover .nav-dropdown-menu { display: block; }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  transition: var(--transition);
}

.dropdown-item:hover {
  color: var(--accent);
  background: rgba(0,255,65,0.04);
  text-shadow: none;
}

.dropdown-item i { font-size: 0.72rem; width: 16px; text-align: center; }

/* ============================
   HERO - EPIC LANDING
   ============================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 56px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero canvas.matrix-rain {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.15;
}

.hero-hex-grid { display: none; }

/* Holographic overlay on hero */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center, transparent 30%, rgba(0,0,0,0.4) 100%),
    linear-gradient(180deg, rgba(0,255,65,0.02) 0%, transparent 40%, rgba(0,212,255,0.02) 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 40px 24px;
  animation: fadeInUp 0.8s ease;
}

.hero-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 30px;
  opacity: 0.6;
  animation: heroFloat 4s ease-in-out infinite;
  filter: drop-shadow(0 0 12px rgba(0,255,65,0.3));
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(0,255,65,0.08);
}

/* Glitch effect on hero title */
.hero-title-glitch {
  position: relative;
  display: inline;
}

.hero-title-glitch::before,
.hero-title-glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
}

.hero-title-glitch::before {
  color: var(--cyan);
  animation: glitch 4s infinite;
}

.hero-title-glitch::after {
  color: var(--red);
  animation: glitch 4s infinite reverse;
}

.hero-title-glitch:hover::before,
.hero-title-glitch:hover::after {
  opacity: 0.6;
}

/* Fallback glitch for the full title when not using data-text */
.hero-title .accent {
  color: var(--accent);
  text-shadow: 0 0 30px rgba(0,255,65,0.3), 0 0 60px rgba(0,255,65,0.1);
  position: relative;
  display: inline-block;
}

.hero-title .accent::before,
.hero-title .accent::after {
  content: 'FLAG';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  pointer-events: none;
}

.hero-title .accent::before {
  color: var(--cyan);
  animation: glitch 5s infinite;
}

.hero-title .accent::after {
  color: var(--red);
  animation: glitch 5s 0.2s infinite reverse;
}

.hero-title:hover .accent::before,
.hero-title:hover .accent::after {
  opacity: 0.5;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 4px;
  text-transform: uppercase;
}

.terminal-line {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-dim);
  margin-bottom: 40px;
  min-height: 1.4em;
}

.terminal-line .prompt {
  color: var(--red);
}

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--accent);
  animation: typeCursor 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
  box-shadow: 0 0 8px rgba(0,255,65,0.4);
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}

.stat-item i {
  font-size: 1rem;
  color: var(--accent-dim);
  opacity: 0.5;
}

/* ============================
   FEATURES / CATEGORIES - GLASS
   ============================ */
.features {
  padding: 80px 0;
  background: var(--bg-secondary);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,255,65,0.15), transparent);
}

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  text-align: center;
  margin-bottom: 50px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 600;
  text-shadow: 0 0 20px rgba(0,255,65,0.05);
}

.section-title .accent {
  color: var(--accent);
  text-shadow: 0 0 15px rgba(0,255,65,0.2);
}

.section-title::before { content: '// '; color: var(--text-muted); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--card-color);
  opacity: 0.5;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  transition: var(--transition);
}

/* Inner light reflection */
.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.02) 0%, transparent 70%);
  pointer-events: none;
  transition: var(--transition);
  opacity: 0;
}

.feature-card:hover {
  border-color: var(--card-color);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 20px rgba(0,255,65,0.05);
}

.feature-card:hover::before { opacity: 1; }
.feature-card:hover::after { opacity: 1; }

.feature-icon {
  font-size: 2rem;
  color: var(--card-color);
  margin-bottom: 16px;
  opacity: 0.7;
  filter: drop-shadow(0 0 6px currentColor);
}

.feature-card h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  text-transform: uppercase;
  font-weight: 600;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.84rem;
  line-height: 1.8;
}

/* ============================
   BUTTONS - GLOW EFFECTS
   ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 700;
  animation: btnPulse 3s infinite;
}

.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: #000;
  box-shadow: 0 0 30px var(--accent-glow), 0 0 60px rgba(0,255,65,0.08);
  transform: translateY(-1px);
  text-shadow: none;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--border-accent);
}

.btn-outline:hover {
  background: rgba(0,255,65,0.04);
  border-color: var(--accent);
  text-shadow: 0 0 8px rgba(0,255,65,0.3);
  box-shadow: 0 0 20px rgba(0,255,65,0.05);
}

.btn-danger {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

.btn-danger:hover {
  background: var(--red-dim);
  box-shadow: 0 0 20px var(--red-glow);
  text-shadow: none;
}

.btn-warning {
  background: var(--orange);
  color: #000;
  border-color: var(--orange);
}

.btn-warning:hover {
  opacity: 0.85;
  box-shadow: 0 0 20px rgba(255,140,0,0.15);
}

.btn-success {
  background: var(--accent-dim);
  color: #fff;
  border-color: var(--accent-dim);
}

.btn-success:hover {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-cyan {
  background: #0098b3;
  color: #fff;
  border-color: #0098b3;
}

.btn-cyan:hover {
  background: var(--cyan);
  color: #000;
  box-shadow: 0 0 20px var(--cyan-glow);
}

.btn-lg { padding: 12px 30px; font-size: 0.8rem; }
.btn-sm { padding: 5px 12px; font-size: 0.68rem; }
.btn-block { width: 100%; justify-content: center; }

/* ============================
   CARDS - GLASSMORPHISM
   ============================ */
.card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
  pointer-events: none;
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 4px 24px rgba(0,0,0,0.2), 0 0 30px rgba(0,255,65,0.03);
}

.card h2 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.card h2 i { color: var(--accent); font-size: 0.78rem; filter: drop-shadow(0 0 4px rgba(0,255,65,0.3)); }

/* ============================
   FLASH & ALERTS
   ============================ */
.flash-message {
  position: fixed;
  top: 70px; right: 20px;
  z-index: 99999;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  animation: slideInRight 0.3s ease;
  max-width: 380px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  gap: 8px;
}

.flash-success {
  background: rgba(0,255,65,0.06);
  border: 1px solid rgba(0,255,65,0.2);
  color: var(--accent);
  box-shadow: 0 0 20px rgba(0,255,65,0.05);
}

.flash-error {
  background: rgba(255,46,77,0.06);
  border: 1px solid rgba(255,46,77,0.2);
  color: var(--red);
  box-shadow: 0 0 20px rgba(255,46,77,0.05);
}

.flash-info {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.2);
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(0,212,255,0.05);
}

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.82rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-error {
  background: var(--red-glow);
  border: 1px solid rgba(255,46,77,0.2);
  color: var(--red);
}

.alert-success {
  background: var(--accent-subtle);
  border: 1px solid rgba(0,255,65,0.15);
  color: var(--accent);
}

.alert-warning {
  background: rgba(255,140,0,0.05);
  border: 1px solid rgba(255,140,0,0.15);
  color: var(--orange);
}

/* ============================
   AUTH PAGES - GLASS CENTER CARD
   ============================ */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 40px;
  position: relative;
}

/* Auth page subtle animated background */
.auth-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(0,255,65,0.02) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 30%, rgba(0,212,255,0.015) 0%, transparent 50%);
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: rgba(14,14,22,0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  animation: fadeInUp 0.5s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(0,255,65,0.02);
}

/* Top glow line on auth card */
.auth-card::before {
  content: '';
  position: absolute;
  top: 0; left: 20%; right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

.auth-card::after { display: none; }

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-header i {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 14px;
  opacity: 0.6;
  filter: drop-shadow(0 0 8px rgba(0,255,65,0.3));
}

.auth-header h2 {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-weight: 700;
  text-shadow: 0 0 15px rgba(0,255,65,0.08);
}

.auth-header p {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-top: 4px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.auth-footer a { color: var(--accent-dim); }

/* ============================
   FORMS - ENHANCED
   ============================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 500;
}

.form-group label i { color: var(--accent); font-size: 0.62rem; }

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(10,10,18,0.6);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-primary);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow), 0 0 20px rgba(0,255,65,0.05);
}

.form-group input::placeholder { color: var(--text-muted); }

.form-group textarea { resize: vertical; min-height: 80px; }

.form-group small { font-size: 0.66rem; color: var(--text-muted); }

.form-group.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.form-group.checkbox input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--accent);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.notes-field label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  margin-bottom: 6px;
  font-weight: 500;
}

.notes-field label i { color: var(--accent); font-size: 0.62rem; }

.notes-field textarea {
  background: rgba(10,10,18,0.6);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-primary);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  transition: var(--transition);
  outline: none;
  resize: vertical;
  min-height: 70px;
  width: 100%;
}

.notes-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow), 0 0 20px rgba(0,255,65,0.05);
}

/* ============================
   PAGE HEADER
   ============================ */
.page-header {
  padding: 90px 0 30px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.page-header::before,
.page-header::after { display: none; }

.page-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-shadow: 0 0 15px rgba(0,255,65,0.06);
}

.page-header h1 i {
  color: var(--accent);
  font-size: 0.9em;
  filter: drop-shadow(0 0 4px rgba(0,255,65,0.3));
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.page-header .back-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-family: var(--font-mono);
}

.page-header .back-link:hover { color: var(--accent); }

/* ============================
   CHALLENGES - ENHANCED
   ============================ */
.challenges-section { padding: 30px 0 80px; }

.category-filters {
  display: flex;
  gap: 6px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 14px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.filter-btn:hover { border-color: var(--border-accent); color: var(--accent); }

.filter-btn.active {
  background: rgba(0,255,65,0.06);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px rgba(0,255,65,0.05);
}

.category-section { margin-bottom: 35px; animation: fadeInUp 0.4s ease; }

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-left: 3px solid var(--cat-color, var(--accent));
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.category-header::before { display: none; }

.category-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.category-icon { font-size: 1.1rem; }

.category-header h2 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 600;
}

.challenge-count {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.challenges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

/* Challenge Cards - Glass + Hover Lift + Green Glow */
.challenge-card {
  display: block;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

/* Inner light reflection on challenge cards */
.challenge-card::before {
  display: none;
}

.challenge-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(0,255,65,0.015) 0%, transparent 70%);
  pointer-events: none;
  transition: var(--transition);
  opacity: 0;
}

.challenge-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  background: rgba(24,24,38,0.4);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 20px rgba(0,255,65,0.06);
}

.challenge-card:hover::after { opacity: 1; }

.challenge-card.solved {
  border-color: rgba(0,255,65,0.12);
  opacity: 0.7;
}

.challenge-card.solved .challenge-solved-badge i {
  animation: solvedCheck 0.4s ease;
}

.challenge-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.challenge-points {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.challenge-solved-badge {
  font-size: 0.64rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 3px;
}

.challenge-hint-indicator {
  font-size: 0.72rem;
  color: var(--orange);
  opacity: 0.6;
  display: flex;
  align-items: center;
  gap: 3px;
  transition: var(--transition);
}

.challenge-card:hover .challenge-hint-indicator { opacity: 1; }

.challenge-title {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.challenge-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

.challenge-meta i { margin-right: 3px; }

/* ============================
   CHALLENGE DETAIL
   ============================ */
.challenge-detail { padding: 30px 0 80px; }

.challenge-detail-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 10px;
}

.category-badge {
  padding: 4px 12px;
  border-radius: var(--radius);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.points-badge {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 8px rgba(0,255,65,0.2);
}

.challenge-detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 20px;
  margin-top: 20px;
}

.description-content {
  line-height: 1.8;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.description-content code {
  background: rgba(0,255,65,0.06);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.description-content pre {
  background: rgba(10,10,18,0.8);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 14px;
  overflow-x: auto;
  margin: 12px 0;
}

.description-content pre code { background: none; padding: 0; }

.hint-box {
  margin-top: 18px;
  padding: 14px;
  background: rgba(255,140,0,0.04);
  border: 1px solid rgba(255,140,0,0.12);
  border-radius: var(--radius);
}

.hint-box h3 {
  font-size: 0.74rem;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.hint-box p { color: var(--text-secondary); font-size: 0.82rem; }

/* Hint hidden/revealed states */
.hint-hidden { border-color: rgba(255,140,0,0.2); }

.hint-blur {
  color: var(--text-muted) !important;
  font-style: italic;
  margin-bottom: 10px;
}

.hint-warning {
  margin-top: 10px;
  padding: 10px 14px;
  background: rgba(255,46,77,0.06);
  border: 1px solid rgba(255,46,77,0.15);
  border-radius: var(--radius);
  font-size: 0.78rem;
  color: var(--text-secondary);
  animation: fadeIn 0.3s ease;
}

.hint-warning i { color: var(--red); margin-right: 4px; }

.hint-warning strong { color: var(--orange); }

.hint-confirm-buttons {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.hint-revealed { border-color: rgba(255,140,0,0.25); background: rgba(255,140,0,0.06); }

.hint-penalty-notice {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(255,140,0,0.05);
  border: 1px solid rgba(255,140,0,0.12);
  border-radius: var(--radius);
  font-size: 0.74rem;
  color: var(--orange);
}

.hint-penalty-notice strong { color: var(--red); }

.hint-content-revealed { animation: fadeIn 0.4s ease; }

.hint-penalty-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: rgba(255,140,0,0.08);
  border: 1px solid rgba(255,140,0,0.2);
  border-radius: var(--radius);
  font-size: 0.72rem;
  color: var(--orange);
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.hint-penalty-badge i { font-size: 0.62rem; }

.hint-penalty-mini {
  display: inline-flex;
  align-items: center;
  color: var(--orange);
  font-size: 0.62rem;
  opacity: 0.7;
  margin-left: 2px;
}

.download-box { margin-top: 18px; }

.flag-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.flag-form input {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 1px;
}

/* ============================
   LEADERBOARD - ROW GLOW + TOP 3
   ============================ */
.leaderboard-section { padding: 30px 0 80px; }

.your-rank {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(0,255,65,0.04);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  font-size: 0.76rem;
  color: var(--accent);
  margin-top: 10px;
  font-family: var(--font-mono);
}

.leaderboard-table {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.leaderboard-header {
  display: grid;
  grid-template-columns: 50px 1fr 100px 100px;
  padding: 12px 18px;
  background: rgba(14,14,22,0.6);
  border-bottom: 1px solid var(--border);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 50px 1fr 100px 100px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  transition: var(--transition);
}

.leaderboard-row:last-child { border-bottom: none; }

.leaderboard-row:hover {
  background: rgba(0,255,65,0.02);
  box-shadow: inset 0 0 20px rgba(0,255,65,0.02);
}

.leaderboard-row.is-you {
  background: rgba(0,255,65,0.04);
  border-left: 2px solid var(--accent);
  box-shadow: inset 0 0 30px rgba(0,255,65,0.03);
}

/* Top 3 with special glow */
.leaderboard-row.top-1 {
  background: rgba(255,215,0,0.03);
  box-shadow: inset 0 0 30px rgba(255,215,0,0.02);
  border-left: 2px solid rgba(255,215,0,0.4);
}

.leaderboard-row.top-2 {
  background: rgba(192,192,192,0.03);
  box-shadow: inset 0 0 30px rgba(192,192,192,0.02);
  border-left: 2px solid rgba(192,192,192,0.3);
}

.leaderboard-row.top-3 {
  background: rgba(205,127,50,0.03);
  box-shadow: inset 0 0 30px rgba(205,127,50,0.02);
  border-left: 2px solid rgba(205,127,50,0.3);
}

.col-rank { font-family: var(--font-mono); font-weight: 700; }
.col-score { font-family: var(--font-mono); color: var(--accent); font-weight: 600; text-shadow: 0 0 6px rgba(0,255,65,0.15); }
.col-solved { color: var(--text-secondary); font-size: 0.84rem; }

.username { font-weight: 600; }

.you-badge {
  background: var(--accent);
  color: #000;
  font-size: 0.56rem;
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: var(--font-mono);
  box-shadow: 0 0 8px rgba(0,255,65,0.3);
}

.gold { color: #ffd700; text-shadow: 0 0 8px rgba(255,215,0,0.3); }
.silver { color: #c0c0c0; text-shadow: 0 0 8px rgba(192,192,192,0.2); }
.bronze { color: #cd7f32; text-shadow: 0 0 8px rgba(205,127,50,0.2); }

.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-muted);
}

.empty-state i { font-size: 2.5rem; color: var(--text-muted); margin-bottom: 12px; opacity: 0.4; }

.empty-state h3 {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}

.empty-state.small { padding: 25px 20px; }

/* ============================
   PROFILE
   ============================ */
.profile-section { padding: 30px 0 80px; }

.profile-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
}

.profile-card { text-align: center; }

.profile-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: rgba(0,255,65,0.06);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  font-size: 1.8rem;
  color: var(--accent);
  box-shadow: 0 0 20px rgba(0,255,65,0.1), inset 0 0 20px rgba(0,255,65,0.03);
}

.profile-email {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.profile-rank {
  color: var(--text-secondary);
  font-size: 0.82rem;
  margin-bottom: 18px;
  font-family: var(--font-mono);
}

.profile-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.profile-stat {
  padding: 12px;
  background: rgba(10,10,18,0.5);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--radius);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 10px rgba(0,255,65,0.15);
}

.stat-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.category-progress { margin-top: 16px; }

.progress-item { margin-bottom: 12px; }

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.progress-bar {
  height: 3px;
  background: rgba(10,10,18,0.6);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease;
  box-shadow: 0 0 6px rgba(0,255,65,0.15);
}

.solved-list { display: flex; flex-direction: column; gap: 8px; }

.solved-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: rgba(10,10,18,0.4);
  border-radius: var(--radius);
  border-left: 2px solid var(--accent);
}

.solved-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.solved-cat {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-mono);
}

.solved-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
}

.solved-points {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}

.history-list { display: flex; flex-direction: column; gap: 6px; }

.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  font-size: 0.78rem;
  border-radius: var(--radius);
}

.history-item.correct { color: var(--accent); }
.history-item.correct i { color: var(--accent); }
.history-item.wrong { color: var(--red); }
.history-item.wrong i { color: var(--red); }

.history-challenge { flex: 1; font-family: var(--font-mono); }

.history-time {
  font-size: 0.66rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ============================
   ADMIN PAGES - GLASS PANELS
   ============================ */
.admin-page { padding-top: 56px; }

.admin-layout {
  display: flex;
  min-height: calc(100vh - 56px);
}

.admin-sidebar {
  width: 220px;
  min-height: calc(100vh - 56px);
  background: rgba(14,14,22,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid rgba(255,255,255,0.04);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
}

.admin-sidebar-header {
  padding: 0 18px 18px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.admin-sidebar-header i { color: var(--accent); font-size: 0.72rem; filter: drop-shadow(0 0 4px rgba(0,255,65,0.3)); }

.admin-sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 10px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  border-radius: var(--radius);
  transition: var(--transition);
  letter-spacing: 0.5px;
}

.sidebar-link:hover {
  color: var(--accent);
  background: rgba(0,255,65,0.04);
  text-shadow: none;
}

.sidebar-link.active {
  color: var(--accent);
  background: rgba(0,255,65,0.06);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
}

.sidebar-link i { font-size: 0.72rem; width: 18px; text-align: center; }

.admin-sidebar-footer {
  padding: 12px 10px 0;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.sidebar-link.secondary {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.sidebar-link.secondary:hover { color: var(--text-secondary); background: rgba(255,255,255,0.02); }

.admin-content {
  flex: 1;
  padding: 24px 0;
  overflow-x: hidden;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-header h1 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-shadow: 0 0 15px rgba(0,255,65,0.06);
}

.admin-header h1 i { color: var(--accent); filter: drop-shadow(0 0 4px rgba(0,255,65,0.3)); }

/* Admin Quick Actions */
.admin-quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.admin-action-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-left: 3px solid var(--action-color, var(--accent));
  border-radius: var(--radius);
  text-decoration: none;
  transition: var(--transition);
  color: inherit;
}

.admin-action-card:hover {
  border-color: var(--action-color, var(--accent));
  background: rgba(24,24,38,0.4);
  transform: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2), 0 0 20px rgba(0,255,65,0.03);
  text-shadow: none;
  color: inherit;
}

.action-icon {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: rgba(0,255,65,0.04);
  font-size: 1.1rem;
  color: var(--action-color, var(--accent));
  flex-shrink: 0;
  filter: drop-shadow(0 0 4px currentColor);
}

.action-info { flex: 1; }

.action-info h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.5px;
  margin-bottom: 3px;
  color: var(--text-primary);
}

.action-info p {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.action-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 1px;
}

.action-arrow {
  color: var(--text-muted);
  font-size: 0.72rem;
  transition: var(--transition);
}

.admin-action-card:hover .action-arrow { color: var(--action-color, var(--accent)); }

/* Admin Stats - Glass with icon glow */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.admin-stat-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  transition: var(--transition);
}

.admin-stat-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15), 0 0 15px rgba(0,255,65,0.03);
}

.admin-stat-card i {
  font-size: 1.2rem;
  opacity: 0.7;
  width: 24px;
  text-align: center;
  color: var(--accent);
  filter: drop-shadow(0 0 4px rgba(0,255,65,0.3));
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-desc {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Admin Grid */
.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Admin List */
.admin-list { display: flex; flex-direction: column; gap: 6px; }

.admin-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  font-size: 0.78rem;
  border-radius: var(--radius);
  background: rgba(10,10,18,0.4);
  font-family: var(--font-mono);
}

.admin-list-item small { color: var(--text-muted); }

.badge {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  padding: 2px 8px;
  border-radius: 3px;
  background: rgba(0,255,65,0.06);
  color: var(--accent);
  font-weight: 600;
}

/* Admin Form */
.admin-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Admin Table */
.admin-table-wrapper { overflow-x: auto; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.admin-table th {
  text-align: left;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

.admin-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  vertical-align: middle;
}

.admin-table tr:hover td {
  background: rgba(0,255,65,0.02);
}

.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 3px;
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.status-badge.active {
  background: rgba(0,255,65,0.06);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.status-badge.inactive {
  background: rgba(255,46,77,0.06);
  color: var(--red);
  border: 1px solid rgba(255,46,77,0.15);
}

.actions-cell {
  display: flex;
  gap: 4px;
  align-items: center;
}

/* Password Display */
.password-display {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(10,10,18,0.6);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.84rem;
}

.password-display span { flex: 1; word-break: break-all; }

.copy-btn {
  padding: 4px 10px;
  background: var(--bg-glass);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--accent);
  font-size: 0.66rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--transition);
}

.copy-btn:hover { background: rgba(0,255,65,0.06); border-color: var(--accent); }

/* Tournament timer */
.tournament-timer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0,255,65,0.04);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-top: 10px;
  animation: borderGlow 4s infinite;
}

.tournament-timer i { font-size: 0.72rem; }

/* ============================
   FOOTER - MINIMAL
   ============================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,255,65,0.1), transparent);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.footer-brand i { color: var(--accent); font-size: 0.9rem; filter: drop-shadow(0 0 4px rgba(0,255,65,0.3)); }
.footer-brand .accent { color: var(--accent); text-shadow: 0 0 10px rgba(0,255,65,0.2); }

.footer-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ============================
   ERROR PAGE
   ============================ */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
}

.error-content h1 {
  font-family: var(--font-mono);
  font-size: 3rem;
  color: var(--red);
  letter-spacing: 6px;
  margin-bottom: 10px;
  text-shadow: 0 0 20px rgba(255,46,77,0.2);
}

.error-content p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 1024px) {
  .admin-sidebar {
    width: 190px;
  }

  .challenge-detail-grid {
    grid-template-columns: 1fr;
  }

  .profile-grid {
    grid-template-columns: 1fr;
  }

  .admin-grid {
    grid-template-columns: 1fr;
  }

  .admin-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0; right: 0;
    background: rgba(14,14,22,0.9);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px;
    gap: 4px;
  }

  .nav-menu.active { display: flex; }

  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-left: 20px;
    margin-top: 0;
    background: none;
  }

  .nav-dropdown:hover .nav-dropdown-menu { display: none; }
  .nav-dropdown.open .nav-dropdown-menu { display: block; }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    z-index: 9999;
    width: 240px;
    box-shadow: 4px 0 30px rgba(0,0,0,0.6);
  }

  .admin-sidebar.mobile-open { display: flex; }

  .admin-layout {
    flex-direction: column;
  }

  .admin-content {
    width: 100%;
  }

  .leaderboard-header,
  .leaderboard-row {
    grid-template-columns: 40px 1fr 80px 80px;
    padding: 10px 14px;
    font-size: 0.72rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 24px;
  }

  .admin-quick-actions {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .auth-card { padding: 30px 20px; }

  .hero-title { letter-spacing: 3px; }

  .admin-stats {
    grid-template-columns: 1fr 1fr;
  }

  .admin-stat-card {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .challenges-grid {
    grid-template-columns: 1fr;
  }

  .leaderboard-header,
  .leaderboard-row {
    grid-template-columns: 35px 1fr 60px;
  }

  .col-solved { display: none; }
}

/* ============================
   MOBILE SIDEBAR TOGGLE
   ============================ */
.admin-mobile-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9990;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #000;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,255,65,0.25);
  transition: var(--transition);
}

.admin-mobile-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 30px rgba(0,255,65,0.35);
}

@media (max-width: 768px) {
  .admin-mobile-toggle { display: flex; align-items: center; justify-content: center; }
}

/* ============================
   MOBILE OVERLAY
   ============================ */
.admin-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 9998;
}

.admin-overlay.active { display: block; }