:root {
    --bg-color: #f0f2f5;
    --text-color: #1c1e21;
    --header-bg: #ffffff;
    --border-color: #ddd;
    --input-bg: #ffffff;
    --post-bg: #000000;
}

body.dark-mode {
    --bg-color: #18191a;
    --text-color: #e4e6eb;
    --header-bg: #242526;
    --border-color: #3a3b3c;
    --input-bg: #3a3b3c;
    --post-bg: #000000;
}

html, body {
    height: 100%;
    margin: 0;
    overflow: hidden; /* Prevent body scroll, we scroll the container */
}

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

#password-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 20;
}

#password-box {
    background-color: var(--header-bg);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

#password-box h2 {
    margin-top: 0;
}

#password-input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

#password-submit, #dark-mode-toggle {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    background-color: #1877f2;
    color: white;
    cursor: pointer;
}

#password-error {
    color: #f02849;
}


header {
    background-color: var(--header-bg);
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    position: fixed; /* Changed from sticky */
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
}

.controls-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

#filters {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

#tags-input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    flex-grow: 1;
}

.filter-group {
    display: flex;
    gap: 0.5rem;
}

#posts-container {
    height: 100vh;
    width: 100vw;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
}

.post {
    width: 100vw;
    height: 100vh;
    scroll-snap-align: start;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--post-bg);
    position: relative;
}

.post img,
.post video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.post .placeholder-thumbnail {
    width: auto;
    height: auto;
    max-width: 80%;
    max-height: 80%;
    filter: blur(20px);
    transform: scale(1.1);
}

#loading {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0,0,0,0.5);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    z-index: 15;
}

.hidden {
    display: none !important;
}