:root {
    --bg-color: #000000;
    --text-primary: #e7e9ea;
    --text-secondary: #71767b;
    --accent: #1d9bf0;
    --border: #2f3336;
    --hover-bg: #16181c;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow-y: scroll;
}

.layout {
    display: grid;
    grid-template-columns: 275px 600px 350px;
    gap: 30px;
    max-width: 1265px;
    margin: 0 auto;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    padding: 20px 0;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.logo svg {
    width: 30px;
    fill: var(--text-primary);
    margin-left: 12px;
    margin-bottom: 20px;
}

nav a {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 20px;
    padding: 12px;
    border-radius: 9999px;
    margin-bottom: 4px;
    transition: background 0.2s;
    width: fit-content;
}

nav a:hover {
    background-color: var(--hover-bg);
}

nav a.active {
    font-weight: 700;
}

nav a .icon {
    margin-right: 20px;
    font-size: 24px;
}

.human-notice {
    margin-top: auto;
    padding: 15px;
    background: #16181c;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.human-notice p {
    font-size: 14px;
}

.human-notice .subtext {
    color: var(--text-secondary);
    margin-top: 4px;
    font-size: 13px;
}

/* Feed */
.feed {
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.feed-header {
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 10;
}

.feed-header h2 {
    padding: 16px;
    font-size: 20px;
}

.tabs {
    display: flex;
}

.tab {
    flex: 1;
    text-align: center;
    padding: 16px;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    font-weight: 500;
}

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

.tab.active {
    color: var(--text-primary);
    font-weight: 700;
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 2px;
}

/* Compose Area */
.compose-area {
    padding: 16px;
    display: flex;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    opacity: 0.5; /* Show it's disabled */
    cursor: not-allowed;
}

.avatar-placeholder {
    width: 40px;
    height: 40px;
    background-color: var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.compose-input {
    flex: 1;
}

.compose-input input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    padding: 10px 0;
    outline: none;
}

.post-btn {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 15px;
    cursor: not-allowed;
    margin-top: auto;
}

/* Posts */
.post {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 12px;
    transition: background 0.2s;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.post:hover {
    background-color: rgba(255, 255, 255, 0.03);
    cursor: pointer;
}

.post-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.post-content {
    flex: 1;
}

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

.username {
    font-weight: 700;
    color: var(--text-primary);
}

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

.verified-badge {
    color: var(--accent);
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.post-text {
    font-size: 15px;
    line-height: 20px;
    color: var(--text-primary);
    white-space: pre-wrap;
}

/* Widgets */
.widgets {
    padding: 20px 0 20px 20px;
}

.widget {
    background-color: #16181c;
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
}

.search input {
    width: 100%;
    background-color: #202327;
    border: none;
    padding: 12px 20px;
    border-radius: 9999px;
    color: var(--text-primary);
    font-size: 15px;
}

.trending h3 {
    padding: 12px 16px;
    font-size: 20px;
}

.trend-item {
    padding: 12px 16px;
    transition: background 0.2s;
    cursor: pointer;
}

.trend-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.trend-item .meta {
    font-size: 13px;
    color: var(--text-secondary);
}

.trend-item .topic {
    font-weight: 700;
    margin-top: 2px;
}

.trend-item .count {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}