/* ==============================================
   Discussions Module - Style WhatsApp
   ============================================== */

.discussions-page {
    padding: var(--spacing-xl);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.discussions-page .page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
}

.discussions-page .page-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 24px;
    font-weight: 700;
    margin: 0;
}

.discussions-page .page-title svg {
    width: 28px;
    height: 28px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 2;
}

.discussions-page .page-subtitle {
    color: var(--text-tertiary);
    font-size: 14px;
    margin: 4px 0 0 0;
}

/* Container */
.discussions-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: var(--spacing-lg);
    flex: 1;
    min-height: 0;
    overflow: hidden;
    height: calc(100vh - 280px);
}

/* Discussions List */
.discussions-list {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.discussions-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl);
    text-align: center;
    color: var(--text-tertiary);
    flex: 1;
}

.discussions-empty svg {
    width: 48px;
    height: 48px;
    stroke: var(--text-tertiary);
    fill: none;
    stroke-width: 1.5;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.discussions-empty p {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 4px 0;
    color: var(--text-secondary);
}

.discussions-empty span {
    font-size: 13px;
}

/* Discussion Item */
.discussion-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s ease;
}

.discussion-item:hover {
    background: var(--bg-card-hover);
}

.discussion-item.active {
    background: rgba(0, 122, 255, 0.1);
    border-left: 3px solid var(--accent);
}

.discussion-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.discussion-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.discussion-avatar .avatar-fallback {
    color: white;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.discussion-content {
    flex: 1;
    min-width: 0;
}

.discussion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}

.discussion-author {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.discussion-time {
    font-size: 11px;
    color: var(--text-tertiary);
}

.discussion-subject {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.discussion-preview {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.discussion-replies-badge {
    display: inline-block;
    margin-top: 6px;
    padding: 2px 8px;
    background: var(--bg-secondary);
    border-radius: 10px;
    font-size: 11px;
    color: var(--text-tertiary);
}

/* Thread */
.discussion-thread {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
    max-height: 100%;
}

.thread-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
}

.thread-empty svg {
    width: 64px;
    height: 64px;
    stroke: var(--text-tertiary);
    fill: none;
    stroke-width: 1.5;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.thread-empty p {
    font-size: 14px;
    margin: 0;
}

.thread-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.thread-subject {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.thread-meta {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Messages */
.thread-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background: var(--bg-secondary);
    min-height: 0;
}

.message {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 80%;
}

.message-own {
    flex-direction: row-reverse;
    margin-left: auto;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-avatar .avatar-fallback {
    color: white;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.message-bubble {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message-own .message-bubble {
    background: var(--accent);
    color: white;
}

.message-parent .message-bubble {
    border: 2px solid var(--accent);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: 4px;
}

.message-author {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
}

.message-own .message-author {
    color: rgba(255, 255, 255, 0.9);
}

.message-time {
    font-size: 10px;
    color: var(--text-tertiary);
}

.message-own .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.message-content {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
}

.message-own .message-content {
    color: white;
}

/* Reply Box */
.thread-reply-box {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--bg-card);
    flex-shrink: 0;
}

.reply-input-container {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.reply-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 14px;
    color: var(--text-primary);
    resize: none;
    min-height: 40px;
    max-height: 120px;
    font-family: inherit;
    line-height: 1.5;
}

.reply-input:focus {
    outline: none;
    border-color: var(--accent);
}

.reply-input::placeholder {
    color: var(--text-tertiary);
}

.btn-send {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-send svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Responsive */
@media (max-width: 1024px) {
    .discussions-container {
        grid-template-columns: 320px 1fr;
    }
}

@media (max-width: 768px) {
    .discussions-page {
        padding: 0;
    }

    .discussions-page .page-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .page-header-actions {
        width: 100%;
    }

    .page-header-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .discussions-filter-bar {
        flex-wrap: wrap;
    }

    .discussions-filter-bar .filter-group {
        width: 100%;
    }

    .discussions-filter-bar .form-select {
        flex: 1;
    }

    .discussions-container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
        height: auto;
        flex: 1;
        margin: 0;
        padding: 0;
    }

    .discussions-list {
        border: none;
        border-radius: 0;
        margin: 0;
        padding: 0;
    }

    .discussion-thread {
        display: none;
    }

    .discussions-container.thread-open .discussions-list {
        display: none;
    }

    .discussions-container.thread-open .discussion-thread {
        display: flex;
    }

    /* Delete button always visible on mobile */
    .btn-delete-message {
        opacity: 0.6;
    }
}

/* Dark mode adjustments */
[data-theme="dark"] .message-bubble {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .message-own .message-bubble {
    background: var(--accent);
}

[data-theme="dark"] .thread-messages {
    background: var(--bg-primary);
}

/* New discussion form */
.new-discussion-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.new-discussion-form .form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.new-discussion-form .form-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.new-discussion-form .form-input {
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
}

.new-discussion-form .form-input:focus {
    outline: none;
    border-color: var(--accent);
}

.new-discussion-form .form-textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}