/* ==========================================================================
   KD2DMR.com — Main Stylesheet
   Dark Tech / Glassmorphism Design
   ========================================================================== */

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

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Backgrounds — USA flag theme: deep navy base */
  --bg-dark:       #050505;
  --bg-card:       #0a0a0a;
  --bg-elevated:   #111111;
  --bg-overlay:    rgba(17, 30, 54, 0.88);

  /* Borders — steel blue */
  --border:        #1a1a1a;
  --border-subtle: rgba(26, 26, 26, 0.5);

  /* Text — off-white / muted blue-grey */
  --text-primary:   #F0F4FA;
  --text-secondary: #9BAEC8;
  --text-muted:     #6B7FA0;

  /* Accent Colors — Old Glory: red, white, blue */
  --green:         #B22234;   /* Flag red — primary accent */
  --green-dark:    #8B1A2A;
  --green-glow:    rgba(178, 34, 52, 0.18);
  --blue:          #3C3B6E;    /* Flag blue — secondary accent */
  --blue-glow:     rgba(60, 59, 110, 0.18);
  --amber:         #E8A11C;    /* Gold star accent */
  --red:           #B22234;
  --purple:        #3C3B6E;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 70px;

  /* Effects */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(60, 59, 110, 0.25);
  --transition:  all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: #050505;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--green);
  text-decoration: none;
  transition: var(--transition);
}

a:hover { color: var(--green); }

img { max-width: 100%; display: block; }

ul, ol { list-style: none; }

button {
  cursor: pointer;
  font-family: var(--font-body);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

.display-font {
  font-family: var(--font-display);
  font-weight: 700;
}

.mono {
  font-family: var(--font-mono);
}

p { color: var(--text-secondary); }

/* --------------------------------------------------------------------------
   Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-xl) 0;
}

.section-sm {
  padding: var(--space-lg) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: var(--space-sm);
}

.section-header p {
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.text-center { text-align: center; }
.text-green  { color: var(--green); }
.text-blue   { color: var(--green); }
.text-amber  { color: var(--amber); }
.text-muted  { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   Glassmorphism Card
   -------------------------------------------------------------------------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(178, 34, 52, 0.4), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(178, 34, 52, 0.35);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 0 20px rgba(178, 34, 52, 0.08);
}

.card:hover::before { opacity: 1; }

.card-glass {
  background: rgba(22, 27, 34, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--green);
  color: var(--bg-dark);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--green);
  color: var(--bg-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
}

.btn-outline:hover {
  background: rgba(0, 212, 255, 0.15);
  color: var(--green);
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--green);
  color: var(--green);
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-green  { background: rgba(178, 34, 52, 0.18); color: #E0354A; border: 1px solid rgba(178,34,52,0.3); }
.badge-blue   { background: rgba(60, 59, 110, 0.18); color: #7B7AC8; border: 1px solid rgba(60,59,110,0.3); }
.badge-amber  { background: rgba(232,161,28,0.18); color: var(--amber); border: 1px solid rgba(232,161,28,0.3); }
.badge-red    { background: rgba(178, 34, 52, 0.18); color: #E0354A; border: 1px solid rgba(178,34,52,0.3); }
.badge-muted  { background: rgba(107,127,160,0.15); color: var(--text-muted); border: 1px solid rgba(107,127,160,0.3); }

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: linear-gradient(180deg, #0A1628 0%, rgba(10, 22, 40, 0.95) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--green);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.97);
  border-bottom-color: var(--blue);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--green) !important;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo:hover { color: var(--green) !important; opacity: 0.85; }

.nav-logo svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.nav-links a.active {
  color: var(--green);
  border-color: rgba(178, 34, 52, 0.25);
  background: rgba(178, 34, 52, 0.08);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: rgba(13, 17, 23, 0.98);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-lg);
  z-index: 999;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: 1px solid transparent;
}

.mobile-menu a:hover, .mobile-menu a.active {
  color: var(--green);
  background: rgba(178, 34, 52, 0.08);
  border-color: rgba(178, 34, 52, 0.2);
}

/* --------------------------------------------------------------------------
   Page Header (shared hero for inner pages)
   -------------------------------------------------------------------------- */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center top, rgba(178,34,52,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(178,34,52,0.1);
  border: 1px solid rgba(178,34,52,0.25);
  color: var(--green);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.page-hero p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   HOME — Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: auto;
  padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-lg);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(60, 59, 110, 0.15) 0%, transparent 30%, transparent 70%, rgba(178, 34, 52, 0.08) 100%),
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(178, 34, 52, 0.10) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(60, 59, 110, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(60, 59, 110, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(60, 59, 110, 0.12) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  opacity: 0.3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

.hero-callsign {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 5rem);
  color: var(--green);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--space-md);
  text-shadow: 0 0 60px rgba(178, 34, 52, 0.35);
  position: relative;
}

.hero-callsign::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto var(--space-md);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--green);
  display: block;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* SVG Tower decoration */
.hero-tower {
  position: absolute;
  right: 5%;
  bottom: 0;
  opacity: 0.12;
  width: 220px;
  height: auto;
  pointer-events: none;
}

.hero-tower-left {
  position: absolute;
  left: 3%;
  bottom: 0;
  opacity: 0.08;
  width: 160px;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   HOME — About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--green-glow);
  border: 1px solid rgba(0, 200, 150, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  flex-shrink: 0;
}

.about-icon-box svg {
  width: 22px;
  height: 22px;
  color: var(--green);
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
}

.about-card p {
  font-size: 0.88rem;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   HOME — Navigation Cards
   -------------------------------------------------------------------------- */
.nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.nav-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-decoration: none;
}

.nav-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-card-icon.green  { background: rgba(0, 212, 255, 0.15); border: 1px solid rgba(0,212,255,0.25); }
.nav-card-icon.blue   { background: var(--blue-glow);  border: 1px solid rgba(88,166,255,0.25); }
.nav-card-icon.amber  { background: rgba(240,136,62,0.12); border: 1px solid rgba(240,136,62,0.25); }

.nav-card-icon svg { width: 20px; height: 20px; }
.nav-card-icon.green svg { color: var(--green); }
.nav-card-icon.blue  svg { color: var(--green); }
.nav-card-icon.amber svg { color: var(--amber); }

.nav-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
  transition: var(--transition);
}

.nav-card:hover h3 { color: var(--green); }

.nav-card p {
  font-size: 0.9rem;
  flex: 1;
}

.nav-card-arrow {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: auto;
}

.nav-card-arrow svg { width: 16px; height: 16px; transition: var(--transition); }
.nav-card:hover .nav-card-arrow svg { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   HOME — Recent Activity
   -------------------------------------------------------------------------- */
.activity-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.activity-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  align-items: flex-start;
  transition: var(--transition);
}

.activity-item:hover {
  border-color: rgba(0, 212, 255, 0.25);
  background: var(--bg-elevated);
}

.activity-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.dot-green  { background: var(--green); box-shadow: 0 0 8px var(--green); }
.dot-blue   { background: var(--green); }
.dot-amber  { background: var(--amber); }

.activity-content { flex: 1; }
.activity-content h4 { font-size: 0.95rem; margin-bottom: 2px; }
.activity-content p  { font-size: 0.85rem; color: var(--text-muted); }

.activity-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   EDUCATION — Topic Cards
   -------------------------------------------------------------------------- */
.edu-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.edu-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.edu-card-icon svg { width: 24px; height: 24px; color: var(--green); }
.edu-card:hover .edu-card-icon {
  background: rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.3);
}

.edu-card h3 { font-size: 1rem; }
.edu-card p  { font-size: 0.88rem; flex: 1; }

/* --------------------------------------------------------------------------
   EDUCATION — Sidebar / Tools
   -------------------------------------------------------------------------- */
.tools-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.tool-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.6rem var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition);
  text-decoration: none;
}

.tool-item:hover {
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--green);
  background: rgba(0, 212, 255, 0.06);
}

.tool-item svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--text-muted); }
.tool-item:hover svg { color: var(--green); }

/* --------------------------------------------------------------------------
   MARKETPLACE — Filter Tabs
   -------------------------------------------------------------------------- */
.filter-bar {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
  padding: var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: fit-content;
}

.filter-tab {
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.filter-tab:hover { color: var(--text-primary); background: var(--bg-elevated); }

.filter-tab.active {
  color: var(--green);
  background: rgba(0, 212, 255, 0.1);
  border-color: rgba(0, 212, 255, 0.25);
}

/* --------------------------------------------------------------------------
   MARKETPLACE — Listing Cards
   -------------------------------------------------------------------------- */
.listing-card {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.listing-photo {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.listing-photo svg {
  width: 60px;
  height: 60px;
  color: var(--text-muted);
  opacity: 0.5;
}

.listing-photo-label {
  position: absolute;
  bottom: var(--space-sm);
  left: var(--space-sm);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: rgba(13,17,23,0.7);
  padding: 2px 6px;
  border-radius: 4px;
}

.listing-body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-sm);
}

.listing-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.listing-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.listing-price {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green);
}

.listing-info {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.listing-info span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.listing-info svg { width: 13px; height: 13px; }

.listing-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

/* --------------------------------------------------------------------------
   RESOURCES — Resource Cards
   -------------------------------------------------------------------------- */
.resource-category { margin-bottom: var(--space-2xl); }

.resource-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.resource-category-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
}

.resource-category-header svg { width: 20px; height: 20px; color: var(--green); }

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-md);
}

.resource-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  text-decoration: none;
}

.resource-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-sm);
}

.resource-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}

.resource-card:hover h3 { color: var(--green); }

.resource-card p {
  font-size: 0.82rem;
  line-height: 1.5;
  flex: 1;
}

.resource-url {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
}

.resource-url svg { width: 12px; height: 12px; }
.resource-card:hover .resource-url { color: var(--green); }

.resource-external-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition);
}

.resource-card:hover .resource-external-icon { color: var(--green); }

/* --------------------------------------------------------------------------
   CTA Sections
   -------------------------------------------------------------------------- */
.cta-section {
  background: linear-gradient(135deg, rgba(178,34,52,0.08) 0%, rgba(60,59,110,0.05) 100%);
  border: 1px solid rgba(178,34,52,0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: var(--space-sm);
}

.cta-section p {
  margin-bottom: var(--space-lg);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--green);
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-signoff {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
  opacity: 0.8;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-col ul li a:hover { color: var(--green); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-freq {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-freq span { color: var(--green); }

/* --------------------------------------------------------------------------
   Dividers & Decorators
   -------------------------------------------------------------------------- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: var(--space-lg) 0;
}

.green-line {
  width: 40px;
  height: 3px;
  background: var(--green);
  border-radius: 2px;
  margin-bottom: var(--space-md);
}

/* Frequency display decoration */
.freq-display {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
  background: rgba(60,59,110,0.08);
  border: 1px solid rgba(60,59,110,0.2);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
}

.freq-display::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* --------------------------------------------------------------------------
   Marketplace Rules
   -------------------------------------------------------------------------- */
.rules-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.rule-item {
  display: flex;
  gap: var(--space-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
  align-items: flex-start;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.rule-item:last-child { border-bottom: none; }

.rule-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green);
  font-weight: 600;
  min-width: 24px;
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   Scrollbar Styling
   -------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* --------------------------------------------------------------------------
   Selection
   -------------------------------------------------------------------------- */
::selection {
  background: rgba(178, 34, 52, 0.25);
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Focus Styles (accessibility)
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Responsive — Tablet (max 900px)
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer-brand { grid-column: 1 / -1; }
}

/* --------------------------------------------------------------------------
   Responsive — Mobile (max 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  :root { --space-4xl: 3rem; --space-3xl: 2.5rem; }

  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .hero-callsign { font-size: clamp(3rem, 16vw, 5rem); }

  .hero-stats { gap: var(--space-xl); }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .nav-cards { grid-template-columns: 1fr; }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-bar { width: 100%; }
  .filter-tab { flex: 1; text-align: center; }

  .cta-section { padding: var(--space-xl); }

  .hero-tower, .hero-tower-left { display: none; }
}

@media (max-width: 480px) {
  .listing-footer { flex-direction: column; align-items: flex-start; gap: var(--space-sm); }
}

/* ==========================================================================
   AUTH — Avatar / User Menu in Navbar
   ========================================================================== */

/* Avatar button in nav-cta */
.nav-avatar-btn {
  position: relative;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: var(--transition);
  flex-shrink: 0;
}

.nav-avatar-btn:hover {
  background: var(--bg-elevated);
}

.nav-avatar-btn .avatar-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--green);
}

.nav-avatar-btn .avatar-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav-avatar-btn:hover .avatar-icon {
  border-color: var(--green);
  color: var(--green);
}

/* Dropdown menu */
.nav-user-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  z-index: 2000;
  overflow: hidden;
}

.nav-user-dropdown.open {
  display: block;
}

.nav-user-dropdown .dropdown-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-user-dropdown .dropdown-header strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.nav-user-dropdown a,
.nav-user-dropdown button.dropdown-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.6rem 1rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.nav-user-dropdown a:hover,
.nav-user-dropdown button.dropdown-item:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.nav-user-dropdown .dropdown-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 0.25rem 0;
}

.nav-user-dropdown .dropdown-danger {
  color: var(--red);
}
.nav-user-dropdown .dropdown-danger:hover {
  background: rgba(248, 81, 73, 0.08);
  color: var(--red);
}

/* Avatar wrapper is position:relative for dropdown positioning */
.nav-avatar-wrap {
  position: relative;
}

/* ==========================================================================
   AUTH — Forms (signup.html, login.html)
   ========================================================================== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-lg) var(--space-xl);
}

.auth-card {
  width: 100%;
  max-width: 460px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-card);
}

.auth-card h1 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-bottom: var(--space-xs);
}

.auth-card .auth-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group label .optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: 4px;
}

.form-input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.65rem 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--green);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input.error {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.1);
}

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

.field-error {
  display: none;
  font-size: 0.8rem;
  color: var(--red);
  margin-top: 4px;
}

.field-error.visible {
  display: block;
}

/* Password strength */
.pw-strength-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: var(--space-xs);
  overflow: hidden;
}

.pw-strength-fill {
  height: 100%;
  width: 0;
  border-radius: 2px;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.pw-strength-fill.weak   { width: 25%; background: var(--red); }
.pw-strength-fill.fair   { width: 50%; background: var(--amber); }
.pw-strength-fill.good   { width: 75%; background: #4ade80; }
.pw-strength-fill.strong { width: 100%; background: var(--green); }

.pw-strength-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 3px;
}

.auth-form-submit {
  width: 100%;
  padding: 0.8rem;
  font-size: 0.95rem;
  margin-top: var(--space-lg);
}

.auth-alt-link {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-alt-link a {
  color: var(--green);
  font-weight: 500;
}

.auth-error-banner {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.3);
  color: var(--red);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  margin-bottom: var(--space-md);
  display: none;
}

.auth-error-banner.visible {
  display: block;
}

/* ==========================================================================
   PROFILE PAGE
   ========================================================================== */
.profile-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 860px) {
  .profile-layout { grid-template-columns: 1fr; }
}

.profile-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 1rem);
}

.profile-avatar-wrap {
  position: relative;
  display: inline-block;
}

.profile-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--green);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.profile-avatar-upload-btn {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: var(--green);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-dark);
  transition: var(--transition);
}

.profile-avatar-upload-btn:hover {
  transform: scale(1.1);
}

.profile-username {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: var(--space-sm) 0 2px;
}

.profile-callsign {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
}

.profile-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.settings-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  margin-top: var(--space-lg);
}

.settings-section-title:first-child {
  margin-top: 0;
}

/* -------------------------------------------------------------------------- */
/* Homepage - Band Conditions & Tools                                          */
/* -------------------------------------------------------------------------- */
.band-stat {
  text-align: center;
  padding: 0.75rem 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.band-stat-val {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--green);
  line-height: 1.2;
}

.band-stat-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

@media (max-width: 768px) {
  .tools-split {
    grid-template-columns: 1fr !important;
  }
  .noswr-split {
    grid-template-columns: 1fr !important;
  }
}

/* Leaflet map dark theme overrides */
.leaflet-container {
  background: #0D1117;
}
.leaflet-popup-content-wrapper {
  background: #161B22;
  color: #E6EDF3;
  border: 1px solid #30363D;
  border-radius: 8px;
}
.leaflet-popup-tip {
  background: #161B22;
  border: 1px solid #30363D;
}
.leaflet-popup-content {
  margin: 10px 14px;
}
.leaflet-control-zoom a {
  background: #161B22 !important;
  color: #E6EDF3 !important;
  border-color: #30363D !important;
}
.leaflet-control-zoom a:hover {
  background: #1F2937 !important;
}
.leaflet-control-attribution {
  background: rgba(13,17,23,0.8) !important;
  color: #6E7681 !important;
}
.leaflet-control-attribution a {
  color: #58A6FF !important;
}