/* ==========================================================================
   LU5MCT - José Luis Carabelli | Estación de Radioaficionado & Proyectos
   Estilos CSS Modernos - Dark Mode & Glassmorphism System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-dark: #07090e;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(0, 242, 254, 0.3);
  
  --primary: #00f2fe;
  --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --accent-purple: #a855f7;
  --purple-gradient: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
  --accent-amber: #f59e0b;
  --accent-green: #10b981;
  --accent-rose: #f43f5e;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.2);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: all 0.3s 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 {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(168, 85, 247, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: #fff;
  font-weight: 700;
  line-height: 1.25;
}

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

a:hover {
  color: #fff;
  text-shadow: 0 0 10px var(--primary);
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-purple-text {
  background: var(--purple-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* Glassmorphism Container */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: var(--transition);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

/* Header Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.callsign-badge {
  background: var(--primary-gradient);
  color: #040914;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
  letter-spacing: 1.5px;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.brand-text {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-main);
}

.brand-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.3rem 0;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.utc-clock-badge {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(0, 242, 254, 0.3);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  padding: 8rem 2rem 4rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-container {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.4);
  border-radius: 50px;
  color: #d8b4fe;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 2rem;
  padding: 0.8rem 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
}

.loc-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-main);
}

.loc-item i {
  color: var(--primary);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #040914;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 242, 254, 0.5);
  color: #000;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
}

.hero-card-stack {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
  border: 1px solid var(--border-glow);
}

.hero-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

.hero-card-stack:hover .hero-img {
  transform: scale(1.03);
}

.hero-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(7, 9, 14, 0.95) 0%, transparent 100%);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.hero-badge-live {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.dot-pulse {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.stat-card {
  padding: 1.2rem;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--primary);
  margin-bottom: 0.2rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Section Commons */
.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  margin-bottom: 0.8rem;
}

.section-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* Projects Section */
.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.55rem 1.2rem;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary-gradient);
  color: #040914;
  border-color: transparent;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-img-wrapper {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-img {
  transform: scale(1.08);
}

.project-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
}

.project-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  flex-grow: 1;
}

.project-techs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.tech-tag {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-detail {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--primary);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
  width: 100%;
}

.btn-detail:hover {
  background: var(--primary);
  color: #040914;
}

/* Ham Radio Calculators & Tools */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.tool-card {
  padding: 2rem;
}

.tool-title {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.tool-title i {
  color: var(--primary);
}

.tool-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  background: rgba(7, 9, 14, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

.calc-result-box {
  margin-top: 1.5rem;
  padding: 1rem 1.2rem;
  background: rgba(0, 242, 254, 0.05);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-sm);
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  font-size: 0.9rem;
}

.result-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary);
}

/* Frequency List Table */
.freq-table-wrapper {
  margin-top: 2.5rem;
  overflow-x: auto;
}

.freq-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.freq-table th {
  background: rgba(30, 41, 59, 0.8);
  padding: 0.8rem 1rem;
  color: var(--primary);
  font-family: var(--font-mono);
  border-bottom: 2px solid var(--border-color);
}

.freq-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.freq-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Image Gallery Section */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 240px;
  cursor: pointer;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 9, 14, 0.85) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.2rem;
  opacity: 0;
  transition: var(--transition);
}

.gallery-item:hover .gallery-img {
  transform: scale(1.1);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-caption {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
}

.gallery-sub {
  color: var(--primary);
  font-size: 0.8rem;
}

/* QSL & Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.qsl-card-mockup {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-glow);
  position: relative;
}

.qsl-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.qsl-call {
  font-size: 2.2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--primary);
  letter-spacing: 2px;
}

.qsl-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.qsl-field-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.qsl-field-val {
  font-weight: 600;
  color: #fff;
}

/* Modal Window */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: #0f172a;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  max-width: 750px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.8);
}

.modal-close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--accent-rose);
}

/* Footer */
.footer {
  background: #04060a;
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem 2rem 2rem;
  text-align: center;
  margin-top: 5rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-socials {
  display: flex;
  gap: 1.2rem;
}

.social-icon {
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 1.1rem;
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--primary);
  color: #040914;
  transform: translateY(-3px);
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-location {
    justify-content: center;
  }
  .hero-buttons {
    justify-content: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tools-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #07090e;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}