/* Mateo PC Tech — black / grey / white / red */

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

body {
  background: #111111;
  color: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: #ef5350;
}

/* Header / navigation */
header {
  background: #000000;
  border-bottom: 3px solid #e53935;
  padding: 20px 24px 0 24px;
}

header h1 {
  font-size: 28px;
  color: #ffffff;
}

header h1 span {
  color: #e53935;
}

nav {
  margin-top: 14px;
}

nav a {
  display: inline-block;
  color: #cccccc;
  text-decoration: none;
  padding: 10px 18px;
  font-weight: bold;
}

nav a:hover {
  color: #ffffff;
  background: #222222;
}

nav a.active {
  color: #ffffff;
  background: #1c1c1c;
  border-bottom: 3px solid #e53935;
  margin-bottom: -3px;
}

/* Main content */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px;
}

h2 {
  color: #ffffff;
  border-bottom: 2px solid #e53935;
  padding-bottom: 8px;
  margin-bottom: 16px;
}

h3 {
  color: #ef5350;
  margin: 20px 0 8px 0;
}

p {
  color: #cccccc;
  margin-bottom: 12px;
}

ul {
  color: #cccccc;
  margin: 0 0 12px 24px;
}

/* Cards */
.card {
  background: #1c1c1c;
  border: 1px solid #333333;
  padding: 20px;
  margin-bottom: 20px;
}

.card h3 {
  margin-top: 0;
}

/* Buttons */
.btn {
  display: inline-block;
  background: #d32f2f;
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
  padding: 10px 20px;
  margin: 6px 8px 6px 0;
}

.btn:hover {
  background: #b71c1c;
}

.btn.grey {
  background: #333333;
}

.btn.grey:hover {
  background: #444444;
}

/* Video grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.video {
  background: #1c1c1c;
  border: 1px solid #333333;
}

.video img {
  width: 100%;
  height: auto;
  display: block;
}

.video .info {
  padding: 12px;
}

.video .info a {
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
  font-size: 14px;
}

.video .info a:hover {
  color: #ef5350;
}

.video .meta {
  color: #888888;
  font-size: 12px;
  margin-top: 6px;
}

/* Footer */
footer {
  background: #000000;
  border-top: 3px solid #e53935;
  color: #888888;
  text-align: center;
  padding: 16px;
  margin-top: 40px;
  font-size: 13px;
}

footer a {
  color: #cccccc;
}

/* Keyboard focus — visible on every dark surface */
a:focus-visible,
.btn:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

/* Skip link: hidden until tabbed to */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: #d32f2f;
  color: #ffffff;
  font-weight: bold;
  padding: 10px 16px;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Reserve thumbnail space so the grid doesn't shift as images load */
.video img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #222222;
}