/* ==========================================================================
   FIP Config Viewer — Official Product Stylesheet
   Designed for Fire Alarm Technicians & Field Engineers
   Aesthetic: Industrial Precision, High-Contrast Dark Engineering Palette
   Platforms: Windows, iOS, Android
   ========================================================================== */

:root {
  --bg-canvas: #090c10;
  --bg-surface: #0f141c;
  --bg-card: #141b26;
  --bg-card-hover: #1b2332;
  --bg-elevated: #1e2838;
  --bg-input: #0c1017;
  
  --border-subtle: #212c3d;
  --border-muted: #2d3b52;
  --border-active: #405473;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-white: #ffffff;

  --accent-red: #ef4444;
  --accent-red-glow: rgba(239, 68, 68, 0.18);
  --accent-orange: #f97316;
  --accent-amber: #f59e0b;
  --accent-blue: #0078d4;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.2);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.65);

  --container-max: 1200px;
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(239, 68, 68, 0.06), transparent 45%),
    linear-gradient(to bottom, var(--bg-canvas), #0c0f14 100%);
  background-repeat: no-repeat;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(9, 12, 16, 0.90);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text-white);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-muted);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-white);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 30px;
  justify-content: center;
  padding: 4px;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: #0078d4;
  color: var(--text-white);
  border: 1px solid #1a8ad9;
  box-shadow: 0 2px 10px rgba(0, 120, 212, 0.35);
}

.btn-primary:hover {
  background-color: #1084d8;
  box-shadow: 0 4px 16px rgba(0, 120, 212, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-muted);
  color: var(--text-white);
  transform: translateY(-1px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding: 5rem 0 3.5rem;
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-white);
  margin-bottom: 1.25rem;
}

.hero-title .text-fire {
  color: #ff5252;
  background: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 740px;
  margin-bottom: 2rem;
}

/* Multi-Platform Download Buttons */
.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.hero-platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(180deg, #1b2332 0%, #131924 100%);
  border: 1px solid var(--border-muted);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
  transition: all var(--transition-fast);
  color: var(--text-white);
  min-width: 170px;
}

.hero-platform-btn:hover {
  border-color: #0078d4;
  background: linear-gradient(180deg, #222d40 0%, #17202e 100%);
  box-shadow: 0 6px 20px rgba(0, 120, 212, 0.3);
  transform: translateY(-2px);
}

.platform-icon {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}

.platform-btn-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.platform-btn-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.platform-btn-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
}

.pricing-pill {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-emerald);
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 2rem;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  width: 100%;
  max-width: 920px;
  margin-top: 1.5rem;
  padding: 1.25rem;
  background-color: rgba(20, 27, 38, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0.5rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Screenshots / Product Showcase Section
   ========================================================================== */

.showcase-section {
  padding: 4.5rem 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-white);
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.showcase-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.showcase-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.showcase-tab:hover {
  color: var(--text-white);
  border-color: var(--border-muted);
}

.showcase-tab.active {
  color: var(--text-white);
  background-color: var(--bg-card);
  border-color: var(--accent-red);
  box-shadow: 0 0 14px rgba(239, 68, 68, 0.2);
}

.showcase-viewport {
  background: #080a0f;
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.window-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: #121721;
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  gap: 7px;
}

.window-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #2b3648;
}

.window-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.showcase-display {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #0b0f16;
}

.screenshot-slide {
  display: none;
  width: 100%;
}

.screenshot-slide.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.screenshot-img-wrap {
  position: relative;
  overflow: hidden;
}

.screenshot-img-wrap img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.screenshot-caption-bar {
  padding: 1rem 1.5rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.caption-meta {
  display: flex;
  flex-direction: column;
}

.caption-heading {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 2px;
}

.caption-details {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.caption-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* ==========================================================================
   Panel Support Matrix
   ========================================================================== */

.matrix-section {
  padding: 4.5rem 0;
  background-color: rgba(15, 20, 28, 0.35);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.matrix-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.matrix-brands-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.matrix-brand-btn {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.matrix-brand-btn:hover {
  color: var(--text-white);
  border-color: var(--border-muted);
}

.matrix-brand-btn.active {
  background-color: var(--bg-elevated);
  border-color: var(--accent-red);
  color: var(--text-white);
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.panel-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.panel-card:hover {
  border-color: var(--border-muted);
  background-color: var(--bg-card-hover);
}

.panel-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.panel-brand-name {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--accent-orange);
  letter-spacing: 0.05em;
  font-weight: 600;
}

.panel-status-pill {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  padding: 2px 6px;
  background-color: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 4px;
}

.panel-models {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 0.5rem;
}

.panel-features-list {
  list-style: none;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-subtle);
}

.panel-features-list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel-features-list li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: bold;
}

/* ==========================================================================
   Specs & Architecture
   ========================================================================== */

.specs-section {
  padding: 4.5rem 0;
}

.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.specs-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.specs-table tr {
  border-bottom: 1px solid var(--border-subtle);
}

.specs-table tr:last-child {
  border-bottom: none;
}

.specs-table td {
  padding: 10px 0;
  font-size: 0.875rem;
}

.specs-table td:first-child {
  color: var(--text-muted);
  width: 42%;
}

.specs-table td:last-child {
  color: var(--text-white);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* ==========================================================================
   Downloads Section
   ========================================================================== */

.downloads-section {
  padding: 4.5rem 0;
  background-color: rgba(15, 20, 28, 0.45);
  border-top: 1px solid var(--border-subtle);
}

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.download-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all var(--transition-fast);
}

.download-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-muted);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.download-card-icon {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 0.5rem;
}

.download-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: #07090d;
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 0 2rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand p {
  margin-top: 8px;
  line-height: 1.5;
}

.footer-links-group {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-col h4 {
  color: var(--text-white);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col a:hover {
  color: var(--text-white);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid #141b26;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-section {
  padding: 3.5rem 0 4.5rem;
}

.contact-card {
  background: linear-gradient(135deg, #161e2c 0%, #111722 100%);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.contact-card-info {
  max-width: 580px;
}

.contact-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 0.5rem;
}

.contact-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-main-btn {
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 992px) {
  .matrix-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .downloads-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
  }

  .nav-links.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

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

  .matrix-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .matrix-search-box {
    width: 100%;
  }

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

@media (max-width: 480px) {
  .hero-stats-row {
    grid-template-columns: 1fr;
  }
  
  .hero-platform-btn {
    width: 100%;
  }
}