:root {
    --bg-color: #000000;
    --border-color: #2f3336;
    --text-primary: #e7e9ea;
    --text-secondary: #71767b;
    --accent-color: #1d9bf0;
    --accent-hover: #1a8cd8;
    --like-color: #f91880;
    --like-hover: rgba(249, 24, 128, 0.1);
    --hover-bg: rgba(255, 255, 255, 0.03);
    --card-bg: #16181c;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.5;
}

.hidden {
    display: none !important;
}

/* Layout */
.container {
    max-width: 1050px;
    margin: 0 auto;
    display: flex;
    min-height: 100vh;
}

.main-column {
    flex: 1;
    max-width: 600px;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.sidebar-column {
    width: 350px;
    padding: 12px 24px;
}

/* Main Header */
.main-header {
    position: sticky;
    top: 0;
    background-color: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(12px);
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.main-header h1 {
    font-size: 20px;
    font-weight: 700;
}

/* Post Form */
.post-form-container {
    display: flex;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.user-avatar-small img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 12px;
}

#post-form {
    flex: 1;
}

#post-body {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    resize: none;
    font-family: var(--font-family);
    outline: none;
    margin-bottom: 12px;
    padding-top: 8px;
}

#post-body::placeholder {
    color: var(--text-secondary);
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.media-btn {
    color: var(--accent-color);
    cursor: pointer;
    font-size: 20px;
    padding: 8px;
    border-radius: 50%;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.media-btn:hover {
    background-color: rgba(29, 155, 240, 0.1);
}

.post-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 18px;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.post-btn:hover {
    background-color: var(--accent-hover);
}

.post-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Media Preview */
#media-preview-container {
    position: relative;
    margin-bottom: 12px;
    border-radius: 16px;
    overflow: hidden;
}

#media-preview-container img, #media-preview-container video {
    max-width: 100%;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

#remove-media-btn {
    position: absolute;
    top: 8px;
    left: 8px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

#remove-media-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Post Element */
.post {
    display: flex;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
    cursor: pointer;
}

.post:hover {
    background-color: var(--hover-bg);
}

.post-content {
    flex: 1;
    min-width: 0; /* Prevents overflow issues */
}

.post-header {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
}

.post-name {
    font-weight: 700;
    margin-right: 4px;
}

.post-handle, .post-time {
    color: var(--text-secondary);
    font-size: 15px;
}

.post-text {
    font-size: 15px;
    margin-bottom: 12px;
    white-space: pre-wrap;
    word-break: break-word;
}

.post-media img, .post-media video {
    width: 100%;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-top: 12px;
}

.post-actions {
    display: flex;
    justify-content: flex-start;
    gap: 60px;
    margin-top: 12px;
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 13px;
    transition: color 0.2s;
}

.action-btn i {
    font-size: 18px;
    margin-right: 8px;
    padding: 8px;
    border-radius: 50%;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-like:hover, .action-like.liked {
    color: var(--like-color);
}

.action-like:hover i {
    background-color: var(--like-hover);
    color: var(--like-color);
}

.action-like.liked i {
    color: var(--like-color);
}

.action-impression {
    cursor: default;
}

/* Sidebar Widgets */
.widget {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 16px;
}

.search-widget {
    margin-bottom: 16px;
    position: sticky;
    top: 12px;
    z-index: 10;
}

.search-box {
    background-color: #202327;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    padding: 12px 20px;
    border: 1px solid transparent;
}

.search-box:focus-within {
    background-color: #000;
    border-color: var(--accent-color);
}

.search-box i {
    color: var(--text-secondary);
    margin-right: 12px;
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 100%;
    outline: none;
    font-family: var(--font-family);
    font-size: 15px;
}

/* Profile Card */
.profile-header {
    margin-bottom: 12px;
}

.profile-avatar-large {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 4px solid var(--card-bg);
}

.profile-name {
    font-size: 20px;
    font-weight: 800;
}

.profile-handle {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.profile-bio {
    font-size: 15px;
    margin-bottom: 16px;
    color: #e7e9ea;
}

.profile-stats {
    display: flex;
    gap: 20px;
}

.stat-box {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-weight: 700;
    font-size: 18px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 13px;
}

.sidebar-footer {
    color: var(--text-secondary);
    font-size: 13px;
    padding: 0 16px;
}

@media (max-width: 1000px) {
    .container {
        flex-direction: column;
        align-items: center;
    }
    .main-column {
        width: 100%;
        border-left: none;
        border-right: none;
    }
    .sidebar-column {
        display: block;
        width: 100%;
        max-width: 600px;
        padding: 24px 16px;
    }
    .search-widget {
        position: static; /* スマホで下に配置された時に固定を解除 */
    }
}

/* Edit and Delete Actions */
.post-header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.admin-actions {
    display: flex;
    gap: 16px;
    margin-right: 8px;
}

.admin-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 15px;
    transition: color 0.2s;
    padding: 4px;
}

.admin-btn:hover {
    color: var(--accent-color);
}

.admin-btn.delete-btn:hover {
    color: #f91880;
}

.edit-textarea {
    width: 100%;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 12px;
    font-family: var(--font-family);
    font-size: 15px;
    resize: vertical;
    min-height: 80px;
    margin-bottom: 12px;
    outline: none;
}

.edit-textarea:focus {
    border-color: var(--accent-color);
}

.edit-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-bottom: 12px;
}

.edit-save-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.edit-save-btn:hover {
    background-color: var(--accent-hover);
}

.edit-cancel-btn {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 16px;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.edit-cancel-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Sidebar Event Widget */
.widget-title {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 12px;
}

.event-banner {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: block;
    cursor: pointer;
    transition: opacity 0.2s;
}

.event-banner:hover {
    opacity: 0.85;
}