/* FİREX® Corporate Theme Stylesheet */
:root {
  --firex-red: #d32f2f;
  --firex-red-hover: #b71c1c;
  --firex-dark: #121619;
  --firex-slate: #1e252b;
  --firex-light-gray: #f8f9fa;
  --firex-border: #e9ecef;
  --firex-accent-gold: #e65100;
  --firex-font-main: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

body {
  font-family: var(--firex-font-main);
  color: #2b3035;
  background-color: #ffffff;
  line-height: 1.6;
}

/* Header & Navigation */
.navbar-brand {
  font-size: 1.75rem;
  letter-spacing: -0.5px;
  color: var(--firex-dark);
}

.bg-firex-dark {
  background-color: var(--firex-dark) !important;
}

.text-firex-red {
  color: var(--firex-red) !important;
}

.btn-firex-red {
  background-color: var(--firex-red);
  color: #ffffff;
  border: none;
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  transition: background-color 0.2s ease-in-out, transform 0.1s ease;
}

.btn-firex-red:hover,
.btn-firex-red:focus {
  background-color: var(--firex-red-hover);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.3);
}

.btn-outline-firex {
  border: 2px solid var(--firex-red);
  color: var(--firex-red);
  font-weight: 600;
}

.btn-outline-firex:hover {
  background-color: var(--firex-red);
  color: #ffffff;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, rgba(18, 22, 25, 0.92) 0%, rgba(30, 37, 43, 0.95) 100%),
              url('https://images.unsplash.com/photo-1542314831-068cd1dbfeeb?auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
  color: #ffffff;
  padding: 5rem 0 6rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
}

/* Feature & Card Components */
.card-custom {
  border: 1px solid var(--firex-border);
  border-radius: 8px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card-custom:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.video-thumbnail-container {
  position: relative;
  cursor: pointer;
  overflow: hidden;
  border-radius: 8px 8px 0 0;
  background-color: #000;
}

.video-thumbnail-container img {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.video-thumbnail-container:hover img {
  opacity: 0.85;
  transform: scale(1.03);
}

.play-button-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: rgba(211, 47, 47, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.75rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.video-thumbnail-container:hover .play-button-overlay {
  transform: translate(-50%, -50%) scale(1.1);
  background: var(--firex-red-hover);
}

/* Placeholder Empty Box */
.placeholder-box {
  background-color: var(--firex-light-gray);
  border: 2px dashed #ced4da;
  border-radius: 8px;
  padding: 3rem 1.5rem;
  text-align: center;
}

/* Document List styling */
.doc-item {
  border-left: 4px solid var(--firex-red);
  background-color: #ffffff;
  padding: 1.25rem;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

/* Accessibility Focus States */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--firex-red) !important;
  outline-offset: 2px !important;
}

/* Footer Styling */
footer {
  background-color: #121619;
  color: #e2e8f0;
}

footer .text-muted {
  color: #cbd5e1 !important;
}

footer h3 {
  color: #ffffff !important;
  letter-spacing: 0.5px;
}

footer ul a {
  color: #e2e8f0;
  text-decoration: none;
  transition: color 0.2s ease-in-out, padding-left 0.2s ease-in-out;
  display: inline-block;
}

footer ul a:hover {
  color: var(--firex-red) !important;
  text-decoration: none;
  padding-left: 4px;
}

footer .border-secondary {
  border-color: rgba(255, 255, 255, 0.15) !important;
}

/* YouTube & Footer Buttons */
footer .btn-youtube {
  background-color: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-weight: 500;
  transition: all 0.25s ease-in-out;
}

footer .btn-youtube:hover,
footer .btn-youtube:focus {
  background-color: #ff0000 !important;
  border-color: #ff0000 !important;
  color: #ffffff !important;
  text-decoration: none !important;
  box-shadow: 0 4px 14px rgba(255, 0, 0, 0.4);
  transform: translateY(-2px);
}