/* Base variables */
:root {
  --color-bg: #f9f9f9;
  --color-header: #ffffff;
  --color-text: #000000;
  --color-accent: #e62117;
  --color-border: #e0e0e0;
}

body.dark {
  --color-bg: #181818;
  --color-header: #202020;
  --color-text: #f5f5f5;
  --color-accent: #ff4b2b;
  --color-border: #333;
}

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

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* Header */
.video-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-header);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.video-header .logo {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-accent);
}

.center-area {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.search-input {
  width: 60%;
  max-width: 500px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: 2px 0 0 2px;
  background-color: var(--color-bg);
  color: var(--color-text);
  outline: none;
}

.search-btn {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  background-color: var(--color-header);
  border-left: none;
  border-radius: 0 2px 2px 0;
  cursor: pointer;
  color: var(--color-text);
}

.search-btn:hover {
  background-color: var(--color-border);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--color-text);
}

/* Main Content */
.video-main {
  padding: 20px;
}

.featured-video {
  margin-bottom: 40px;
}

.featured-video h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-section h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.video-card {
  background-color: var(--color-header);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.video-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

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

.video-info {
  padding: 10px;
}

.video-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.video-channel {
  font-size: 0.8rem;
  color: #777;
}