:root {
    --bg-app: #0f0f12;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --success-color: #10b981;
    --glass-blur: blur(12px);
    --font-family: 'Inter', sans-serif;
    --transition-speed: 0.2s;
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Utils */
.hidden {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

/* App Container */
.app-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar-container {
    position: relative;
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    z-index: 2;
}

.mood-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: rotate 4s linear infinite;
    z-index: 1;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.user-status {
    display: flex;
    flex-direction: column;
    font-size: 0.8rem;
}

.status-text {
    font-weight: 600;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--success-color);
    border-radius: 50%;
    display: inline-block;
    margin-top: 4px;
    box-shadow: 0 0 8px var(--success-color);
}

/* Composer */
.composer-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: var(--glass-blur);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
    margin-bottom: 2rem;
    position: relative;
    z-index: 10;
}

.composer-container.flying {
    position: fixed; /* Detach from flow */
    transform: translateY(100px) scale(0.95);
    opacity: 0;
    pointer-events: none;
    z-index: 0;
}

.composer-header {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.rich-input-wrapper {
    position: relative;
    min-height: 80px;
    margin-bottom: 1.5rem;
}

.rich-input {
    width: 100%;
    min-height: 80px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    position: relative;
    z-index: 2;
}

.rich-input:empty::before {
   /* Using JS based placeholder for better control, but CSS fallback here */
   content: attr(placeholder);
   color: var(--text-secondary);
   opacity: 0.6;
   pointer-events: none;
   display: block; /* Important for empty contenteditable */
}

/* Hide CSS placeholder if JS one is active, or vice versa if preferred */
.rich-input:not(:empty) + .placeholder-text {
    display: none;
}

.placeholder-text {
    position: absolute;
    top: 0;
    left: 0;
    color: var(--text-secondary);
    opacity: 0.6;
    pointer-events: none;
    font-size: 1.1rem;
    line-height: 1.6;
    z-index: 1;
}

/* Composer Actions */
.composer-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.left-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.icon-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.post-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 24px;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.post-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.post-btn:active {
    transform: translateY(0);
}

/* Generated Post Styles */
.feed-post {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    animation: slideIn 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

.feed-post.optimistic {
    opacity: 0.6;
    border-style: dashed;
}

.feed-post.optimistic::after {
    content: 'Sending...';
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-style: italic;
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-content {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

/* Floating Menu */
.floating-menu {
    position: absolute;
    background: rgba(30, 30, 35, 0.95);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 280px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    z-index: 100;
    overflow: hidden;
    padding: 0.5rem 0;
    animation: menuFadeIn 0.15s ease-out;
}

@keyframes menuFadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.menu-header {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    font-weight: 600;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.1s;
}

.menu-item:hover, .menu-item.selected {
    background: var(--accent-color);
    color: white;
}

.menu-item:hover .desc, .menu-item.selected .desc {
    color: rgba(255,255,255,0.8);
}

.menu-item .icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    font-size: 12px;
}

.menu-item .content {
    display: flex;
    flex-direction: column;
}

.menu-item .title {
    font-size: 0.9rem;
    font-weight: 500;
}

.menu-item .desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Mention Styles */
.mention-chip {
    background: rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
    display: inline-block;
}

/* Masonry Grid */
.media-grid {
    display: grid;
    gap: 8px;
    margin-top: 1rem;
}
/* Simple masonry simulation with flex or grid */
.media-grid:not(:empty) {
   grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
}

.media-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 1; /* Square for simplicity initially */
    background: #2a2a2a;
    cursor: grab;
}

.media-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-item:active {
    cursor: grabbing;
}