.dm-page {
    height: calc(100vh - 80px); /* Adjust for navbar */
    display: flex;
    flex-direction: column;
    padding-bottom: 20px;
}

.dm-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
    gap: 1px; /* Separator line gap */
}

/* Sidebar */
.dm-sidebar {
    width: 300px;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.2);
}

.dm-sidebar-header {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dm-sidebar-header h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.dm-list {
    flex: 1;
    overflow-y: auto;
}

.dm-item {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
}

.dm-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.dm-item.active {
    background: rgba(var(--accent-primary-rgb), 0.15);
    border-left: 3px solid var(--accent-primary);
}

.dm-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-secondary);
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
    border: 2px solid transparent;
}

.dm-item.active .dm-avatar {
    border-color: var(--accent-primary);
}

.dm-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dm-name {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.dm-preview {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dm-item.active .dm-preview {
    color: var(--text-secondary);
}

/* Chat Area */
.dm-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: rgba(0, 0, 0, 0.1);
}

.dm-chat-header {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.2);
    height: 64px; /* Fixed height for consistency */
}

.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    background-size: cover;
    background-position: center;
}

.chat-username {
    font-weight: 700;
    font-size: 1.05rem;
}

.chat-status {
    font-size: 0.75rem;
    color: #4ade80; /* Green */
    display: flex;
    align-items: center;
    gap: 4px;
}

.chat-status::before {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.dm-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem; /* Tighter gap between messages */
}

/* Scrollbar styling */
.dm-messages::-webkit-scrollbar {
    width: 6px;
}
.dm-messages::-webkit-scrollbar-track {
    background: transparent;
}
.dm-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.message-row {
    display: flex;
    gap: 10px;
    max-width: 75%;
    width: fit-content; /* Shrink to fit content */
    margin-bottom: 4px;
}

.message-row.me {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-row.them {
    align-self: flex-start;
}

.message-bubble {
    padding: 0.6rem 1rem;
    border-radius: 18px;
    position: relative;
    word-break: break-word;
    white-space: pre-wrap;
    font-size: 0.95rem;
    line-height: 1.4;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.message-row.me .message-bubble {
    background: var(--accent-primary); /* Uses theme color */
    color: white;
    border-bottom-right-radius: 4px;
}

.message-row.them .message-bubble {
    background: #3a3a3c; /* iOS dark mode gray style */
    color: white;
    border-bottom-left-radius: 4px;
}

/* Chat Media & Links */
.chat-link {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 2px;
    word-break: break-all;
}

.chat-link:hover {
    opacity: 0.9;
}

.chat-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    margin-top: 4px;
    display: block;
    cursor: pointer;
    transition: transform 0.2s;
}

.chat-image:hover {
    transform: scale(1.02);
}

.chat-image-link {
    display: block;
    text-decoration: none;
}

/* Grouping logic visualization (optional future enhancement) */
.message-row + .message-row {
    margin-top: 2px;
}

/* Empty State */
.state-empty {
    text-align: center;
    color: var(--text-tertiary);
    margin-top: 20vh;
    font-size: 1.1rem;
}

/* Input Area */
.dm-input-area {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--glass-border);
    background: var(--glass-surface-soft);
    backdrop-filter: blur(calc(var(--glass-blur) * 0.9)) saturate(1.15);
    -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 0.9)) saturate(1.15);
}

#dm-form {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    background: var(--glass-surface-soft);
    padding: 8px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-inset);
    position: relative; /* For emoji picker positioning */
}

#dm-form:focus-within {
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.07);
}

#dm-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 8px 12px;
    color: var(--text-primary);
    resize: none;
    font-family: inherit;
    line-height: 1.4;
    max-height: 120px;
    min-height: 24px;
    outline: none;
}

#dm-form button {
    background: transparent;
    color: var(--text-tertiary);
    border: none;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#dm-form button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: scale(1.1);
}

#dm-form button[type="submit"] {
    color: var(--accent-primary);
}

#dm-form button:disabled {
    color: var(--text-tertiary);
    cursor: not-allowed;
}

/* Emoji Picker */
.emoji-trigger svg {
    stroke-width: 1.5;
}

.emoji-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 12px;
    background: var(--glass-surface);
    backdrop-filter: blur(var(--glass-blur)) saturate(1.2);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    width: 350px;
    max-width: 90vw;
    box-shadow: var(--glass-shadow), var(--glass-inset);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 10px;
    
    /* Animation defaults (Hidden state) */
    opacity: 0;
    transform: translateY(10px) scale(0.95);
    visibility: hidden;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.emoji-picker.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
    pointer-events: auto;
}

/* Remove old hidden rule if exists, or override it */
.emoji-picker.hidden {
    display: flex; /* Override previous display:none if JS still toggles it, but we should switch JS to toggle .active */
}

.emoji-header {
    position: relative;
}

#emoji-search {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

#emoji-search:focus {
    border-color: var(--accent-primary);
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    gap: 4px;
    max-height: 250px;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px; /* Space for scrollbar */
}

.emoji-grid span {
    font-size: 1.4rem;
    cursor: pointer;
    text-align: center;
    padding: 6px;
    border-radius: 6px;
    transition: background 0.1s;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.emoji-grid span:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Custom Scrollbar for Emoji Picker */
.emoji-grid::-webkit-scrollbar {
    width: 6px;
}

.emoji-grid::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

.emoji-grid::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.emoji-grid::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .dm-container {
        flex-direction: column;
    }
    .dm-sidebar {
        width: 100%;
        border-right: none;
        height: 100%;
    }
    
    .dm-page.chat-active .dm-sidebar {
        display: none;
    }
    
    .dm-page:not(.chat-active) .dm-chat {
        display: none;
    }

    /* Back button for mobile (needs JS implementation if not exists) */
    .dm-chat-header {
        padding-left: 0.5rem;
    }
}