:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --accent: #F3B229;
    --accent-hover: #d19721;
    --danger: #cc3333;
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --bg-color: #f0f2f5; 
    --text-color: #1c1e21;
    --card-bg: #ffffff;
    --border-color: #ced0d4;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body { background-color: var(--bg-color); color: var(--text-color); transition: var(--transition); line-height: 1.6; }

header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 5%; background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo img { height: 90px; object-fit: contain; transition: var(--transition); }

button {
    background-color: var(--accent); color: #121212; border: none;
    padding: 8px 16px; border-radius: 6px; cursor: pointer;
    font-weight: bold; transition: var(--transition);
}
button:hover { background-color: var(--accent-hover); }
button.danger { background-color: var(--danger); color: white; }

.feed-container { max-width: 680px; margin: 30px auto; padding: 0 15px; }

.post-card {
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 12px; margin-bottom: 25px; overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.post-card.visible { opacity: 1; transform: translateY(0); }
.post-header { padding: 15px 20px 5px; }
.post-header h3 { margin: 0; font-size: 1.25rem; color: var(--text-color); }
.post-date { font-size: 0.85rem; color: #888; display: block; margin-top: 2px; }
.post-body { padding: 10px 20px 15px; font-size: 0.95rem; white-space: pre-line; }

.post-collage { display: grid; gap: 2px; width: 100%; background: var(--border-color); }
.collage-item { position: relative; cursor: pointer; overflow: hidden; background: var(--bg-color); }
.collage-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s, opacity 0.3s; opacity: 1; }
.collage-item:hover img { transform: scale(1.03); }

.glare-wrapper {
    background: linear-gradient(90deg, var(--card-bg) 25%, var(--border-color) 50%, var(--card-bg) 75%);
    background-size: 200% 100%; animation: shimmer 1.5s infinite linear;
}
.glare-wrapper img { opacity: 0 !important; } 
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.collage-1 { grid-template-columns: 1fr; }
.collage-1 .collage-item { max-height: 500px; }
.collage-2 { grid-template-columns: 1fr 1fr; height: 350px; }
.collage-3 { grid-template-columns: 2fr 1fr; grid-template-rows: 1fr 1fr; height: 400px; }
.collage-3 .collage-item:first-child { grid-row: 1 / 3; }
.collage-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; height: 400px; }

.more-overlay {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); color: white;
    display: flex; align-items: center; justify-content: center;
    font-size: 2.5rem; font-weight: bold; pointer-events: none;
}

/* Fullscreen Lightbox & Navigation */
.lightbox {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.95); display: none; flex-direction: column; justify-content: space-between;
    z-index: 1000; color: #fff;
}
.lightbox.active { display: flex; }
.lb-header { padding: 20px; text-align: center; flex-shrink: 0; }
.lb-header h2 { margin-bottom: 5px; color: var(--accent); }
.lb-content { flex-grow: 1; display: flex; justify-content: center; align-items: center; overflow: hidden; padding: 0 60px; position: relative;}
.lb-content img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 5px; box-shadow: 0 0 20px rgba(0,0,0,0.5); }
.lb-footer { padding: 20px; text-align: center; max-width: 800px; margin: 0 auto; flex-shrink: 0; }
.lb-close { position: absolute; top: 20px; right: 30px; font-size: 40px; cursor: pointer; color: #fff; z-index: 1010; transition: color 0.3s; }
.lb-close:hover { color: var(--danger); }

.nav-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1); color: white; border: none;
    font-size: 2rem; padding: 15px 20px; cursor: pointer;
    z-index: 1010; transition: var(--transition); border-radius: 5px;
}
.nav-btn:hover { background: rgba(243, 178, 41, 0.8); color: #121212; }
.prev-btn { left: 20px; }
.next-btn { right: 20px; }

/* Admin UI */
.admin-card { background: var(--card-bg); padding: 30px; border-radius: 10px; margin-bottom: 30px; max-width: 800px; margin: 30px auto; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: bold; }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px; background: var(--bg-color); color: var(--text-color);
    border: 1px solid var(--border-color); border-radius: 5px;
}
.drop-zone { border: 2px dashed var(--border-color); padding: 40px; text-align: center; border-radius: 10px; cursor: pointer; transition: var(--transition); }
.drop-zone.dragover { border-color: var(--accent); background: rgba(243, 178, 41, 0.1); }
.post-list-item { display: flex; justify-content: space-between; align-items: center; padding: 15px; border-bottom: 1px solid var(--border-color); }

/* Upload Preview Grid */
#previewList { 
    display: flex; flex-wrap: wrap; gap: 15px; margin-top: 15px; 
}
.preview-item { 
    position: relative; width: 130px; background: var(--bg-color); 
    border: 1px solid var(--border-color); border-radius: 8px; padding: 8px; 
    display: flex; flex-direction: column; align-items: center; overflow: hidden;
}
.preview-thumb { 
    width: 100%; height: 90px; object-fit: cover; border-radius: 4px; margin-bottom: 8px; 
    background: #000;
}
.file-name { 
    font-size: 0.75em; text-align: center; width: 100%; white-space: nowrap; 
    overflow: hidden; text-overflow: ellipsis; 
}
.remove-btn { 
    position: absolute; top: 4px; right: 4px; background: rgba(204, 51, 51, 0.9); 
    color: white; border: none; border-radius: 50%; width: 22px; height: 22px; 
    font-size: 14px; font-weight: bold; cursor: pointer; 
    display: flex; align-items: center; justify-content: center; z-index: 10;
}
.remove-btn:hover { background: #ff0000; }

/* Overlays for progress and success state on thumbnails */
.upload-overlay, .success-overlay { 
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; 
    background: rgba(18, 18, 18, 0.85); display: none; flex-direction: column; 
    align-items: center; justify-content: center; padding: 10px; border-radius: 8px; z-index: 5;
}
.progress-bar { 
    width: 100%; height: 8px; background: #333; border-radius: 4px; overflow: hidden; margin-bottom: 5px; 
}
.progress-fill { height: 100%; width: 0%; background: var(--accent); transition: width 0.1s; }
.progress-stats { font-size: 0.8em; color: #fff; font-weight: bold; }
.success-tick { color: #28a745; font-size: 2.5rem; line-height: 1; }