:root {
  --bg-color: linear-gradient(135deg, #1f1f1f 0%, #2a2a2e 50%, #3a3a40 100%);
  --text-color: #fff;
  --card-bg: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
  --input-bg: #333;
  --input-text: #fff;
  --footer-bg: rgba(20, 20, 20, 0.9);
  --button-bg: rgba(255,255,255,0.1);
}

.light-theme {
  --bg-color: linear-gradient(135deg, #f9f9fb 0%, #eef1f7 40%, #e9efff 100%);
  --text-color: #1a1a2e;
  --card-bg: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
  --input-bg: #fff;
  --input-text: #1a1a2e;
  --footer-bg: #eaeaea;
  --button-bg: rgba(0,0,0,0.1);
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: var(--bg-color);
  background-attachment: fixed;
  background-size: cover;
  color: var(--text-color);
  transition: background 0.5s ease, color 0.3s ease;
}

.header {
  padding: 20px;
  text-align: center;
}

.filter-area {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

#filterInput {
  padding: 10px;
  width: 250px;
  border-radius: 8px;
  border: none;
  outline: none;
  background-color: var(--input-bg);
  color: var(--input-text);
}

#themeToggle {
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: var(--button-bg);
  color: var(--text-color);
}


.gallery {
  column-count: 4;
  column-gap: 18px;
  padding: 20px;
}

@media (max-width: 1200px) {
  .gallery {
    column-count: 3;
  }
}

@media (max-width: 800px) {
  .gallery {
    column-count: 2;
  }
}

@media (max-width: 500px) {
  .gallery {
    column-count: 1;
  }
}


.card {
  display: inline-block;
  width: 100%;
  margin-bottom: 18px;
  break-inside: avoid;
  position: relative;
  border-radius: 16px;
  background: var(--card-bg);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  padding: 8px; 
  box-sizing: border-box;
}

.card:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 15px rgba(0,0,0,0.4);
}


.card-title {
  padding: 4px;
  font-weight: bold;
  font-size: 14px;
  text-align: center;
}


.card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  object-fit: contain;
  transition: all 0.3s ease;
  background: rgba(0,0,0,0.05);
}


.card img {
  max-height: 280px; 
}

.card.horizontal img {
  max-height: 240px;
}

.card.vertical img {
  max-height: 320px;
}


.card-author {
  padding: 6px 8px;
  font-size: 12px;
  text-align: center;
  background-color: rgba(255,255,255,0.5);
  color: #333;
  border-radius: 8px;
  margin-top: 6px;
}

body:not(.light-theme) .card-author {
  background-color: rgba(0,0,0,0.4);
  color: #fff;
}


.buttons {
  position: absolute;
  top: 10px;
  right: 10px;
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover .buttons {
  opacity: 1;
}

.download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  background: var(--button-bg);
  padding: 8px;
  border-radius: 50%;
  text-decoration: none;
  width: 34px;
  height: 34px;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.download-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s, stroke 0.2s;
}

.download-btn:hover {
  transform: scale(1.2);
  box-shadow: 0 6px 15px rgba(0,0,0,0.35);
  background: linear-gradient(135deg, #8c9eff, #82f7ff);
}

.download-btn:hover svg {
  stroke: #fff;
  transform: scale(1.1);
}


.modal {
  display: none;
  position: fixed;
  z-index: 100;
  padding-top: 60px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.9);
}

.modal-content {
  margin: auto;
  display: block;
  max-width: 90%;
  max-height: 80%;
  border-radius: 12px;
}

.close {
  position: absolute;
  top: 20px;
  right: 35px;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  cursor: pointer;
}


.footer {
  text-align: center;
  padding: 15px;
  background: var(--footer-bg);
  color: var(--text-color);
  margin-top: 20px;
  font-size: 14px;
}


.checkbox-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.checkbox-container input {
  opacity: 0;
  width: 0;
  height: 0;
}

.checkmark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background-color: rgba(0,0,0,0.1);
  margin-right: 6px;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.light-theme .checkmark {
  background-color: rgba(0,0,0,0.1);
}

body:not(.light-theme) .checkmark {
  background-color: rgba(255,255,255,0.1);
}

.checkbox-container input:checked ~ .checkmark {
  background: linear-gradient(135deg, #8c9eff, #82f7ff);
  box-shadow: 0 0 10px rgba(140,158,255,0.6);
}

.label-text {
  font-size: 13px;
  font-weight: bold;
  color: var(--text-color);
  letter-spacing: 1px;
}

.video-thumb {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0,0,0,0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.video-thumb:hover {
  transform: scale(1.03);
  box-shadow: 0 0 12px rgba(0,0,0,0.35);
}