/* ============================================================
   Think Tanks Collective — Frontend Stylesheet
   ============================================================ */

/* ===== CSS VARIABLES ===== */
:root {
    --tt-primary: #1a1a1a;
    --tt-primary-light: #333;
    --tt-primary-dark: #000;
    --tt-accent: #959577;
    
    --tt-success: #10b981;
    --tt-warning: #f59e0b;
    --tt-danger: #ef4444;
    --tt-info: #3b82f6;
    
    --tt-radius-sm: 0.375rem;
    --tt-radius: 0.5rem;
    --tt-radius-lg: 0.75rem;
    --tt-radius-xl: 1rem;
}

/* Light theme */
[data-theme="light"] {
    --tt-bg-main: #f5f3ef;
    --tt-bg-card: #ffffff;
    --tt-bg-hover: #f0efe8;
    --tt-text-main: #1a1a1a;
    --tt-text-muted: #8b8a86;
    --tt-border: #e8e6e1;
    --tt-shadow: 0 1px 3px rgba(0,0,0,.05);
    --tt-shadow-lg: 0 4px 12px rgba(0,0,0,.08);
}

/* Dark theme */
[data-theme="dark"] {
    --tt-bg-main: #0d0d0b;
    --tt-bg-card: #18181a;
    --tt-bg-hover: #222220;
    --tt-text-main: #f0efe8;
    --tt-text-muted: #9ca3af;
    --tt-border: #2a2a28;
    --tt-shadow: 0 1px 3px rgba(0,0,0,.4);
    --tt-shadow-lg: 0 4px 12px rgba(0,0,0,.5);
}

/* ===== BASE ===== */
.tt-app {
    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: var(--tt-bg-main);
    color: var(--tt-text-main);
    min-height: 100vh;
    display: flex;
}

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

/* ===== SIDEBAR ===== */
.tt-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    background: var(--tt-bg-card);
    border-right: 1px solid var(--tt-border);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.tt-sidebar-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tt-sidebar-header {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--tt-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tt-sidebar-header h1 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.tt-sidebar-header p {
    font-size: 12px;
    color: var(--tt-text-muted);
}

.tt-close-sidebar {
    background: none;
    border: none;
    color: var(--tt-text-muted);
    cursor: pointer;
    display: none;
    font-size: 1rem;
}

.tt-nav-main {
    flex: 1;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.tt-nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--tt-text-muted);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.15s;
}

.tt-nav-item i {
    width: 24px;
    font-size: 18px;
}

.tt-nav-item:hover {
    background: var(--tt-bg-hover);
    color: var(--tt-text-main);
}

.tt-nav-item.active {
    background: var(--tt-primary);
    color: white;
}

.tt-nav-item.active i {
    color: white;
}

.tt-nav-divider {
    margin: 16px 0 8px;
    padding-top: 8px;
    border-top: 1px solid var(--tt-border);
}

/* User block */
.tt-nav-user {
    padding: 20px 24px;
    border-top: 1px solid var(--tt-border);
    position: relative;
}

.tt-user-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    background: none;
    border: none;
    width: 100%;
    padding: 8px;
    border-radius: var(--tt-radius);
    cursor: pointer;
    color: var(--tt-text-main);
    text-align: left;
}

.tt-user-btn:hover {
    background: var(--tt-bg-hover);
}

.tt-user-avatar {
    width: 36px;
    height: 36px;
    background: var(--tt-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    flex-shrink: 0;
}

.tt-user-info {
    flex: 1;
    min-width: 0;
}

.tt-user-name {
    font-weight: 600;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tt-user-role {
    font-size: 10px;
    color: var(--tt-text-muted);
}

.tt-user-chevron {
    color: var(--tt-text-muted);
    font-size: 12px;
    transition: transform 0.2s;
}

.tt-user-dropdown.active .tt-user-chevron {
    transform: rotate(180deg);
}

.tt-dropdown-menu {
    position: absolute;
    bottom: 100%;
    left: 1rem;
    right: 1rem;
    margin-bottom: 0.5rem;
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius);
    box-shadow: var(--tt-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.2s;
    z-index: 1000;
}

.tt-user-dropdown.active .tt-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tt-dropdown-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--tt-border);
}

.tt-dropdown-divider {
    height: 1px;
    background: var(--tt-border);
}

.tt-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--tt-text-main);
    text-decoration: none;
    font-size: 13px;
    transition: background 0.2s;
}

.tt-dropdown-item:hover {
    background: var(--tt-bg-hover);
}

.tt-logout {
    color: var(--tt-danger) !important;
}

/* Overlay */
.tt-sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 190;
    display: none;
}

.tt-sidebar-overlay.active {
    display: block;
}

/* ===== HEADER ===== */
.tt-header {
    background: var(--tt-bg-card);
    border-bottom: 1px solid var(--tt-border);
    height: 64px;
    position: fixed;
    top: 0;
    left: 280px;
    right: 0;
    z-index: 100;
    transition: left 0.3s ease;
}

.tt-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 100%;
    gap: 1rem;
}

.tt-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tt-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--tt-text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

.tt-mobile-toggle:hover {
    color: var(--tt-text-main);
}

.tt-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 14px;
    color: var(--tt-text-muted);
}

.tt-breadcrumb i {
    font-size: 10px;
}

.tt-current {
    color: var(--tt-text-main);
    font-weight: 500;
}

.tt-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tt-theme-btn {
    background: none;
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius);
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--tt-text-muted);
    transition: all 0.2s;
}

.tt-theme-btn:hover {
    background: var(--tt-bg-hover);
    border-color: var(--tt-accent);
    color: var(--tt-accent);
}

.tt-theme-icon-light {
    display: none;
}
.tt-theme-icon-dark {
    display: block;
}
[data-theme="light"] .tt-theme-icon-light {
    display: block;
}
[data-theme="light"] .tt-theme-icon-dark {
    display: none;
}
[data-theme="dark"] .tt-theme-icon-light {
    display: none;
}
[data-theme="dark"] .tt-theme-icon-dark {
    display: block;
}

/* ===== MAIN CONTENT ===== */
.tt-main-content {
    flex: 1;
    margin-left: 280px;
    overflow-y: auto;
    height: 100vh;
    background: var(--tt-bg-main);
}

.tt-main-content-inner {
    padding: 1.5rem;
    padding-top: calc(64px + 1.5rem);
    max-width: 1280px;
    margin: 0 auto;
}

/* ===== PAGE TITLE ===== */
.tt-page-title {
    margin-bottom: 1.5rem;
}

.tt-page-title h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 6px;
}

.tt-page-title p {
    color: var(--tt-text-muted);
    font-size: 14px;
}

/* ===== STATS GRID ===== */
.tt-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tt-stat-card {
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius-xl);
    padding: 1.25rem;
    text-align: center;
}

.tt-stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--tt-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

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

/* ===== CARDS ===== */
.tt-card {
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius-xl);
    overflow: hidden;
    margin-bottom: 1rem;
}

.tt-card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--tt-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tt-card-header h2 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tt-card-header h2 i {
    color: var(--tt-accent);
}

.tt-card-body {
    padding: 1.5rem;
}

/* ===== BUTTONS ===== */
.tt-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1.1rem;
    border-radius: var(--tt-radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.2s;
}

.tt-btn-primary {
    background: var(--tt-primary);
    color: white;
}

.tt-btn-primary:hover {
    background: var(--tt-primary-light);
}

.tt-btn-outline {
    background: transparent;
    border: 1px solid var(--tt-border);
    color: var(--tt-text-main);
}

.tt-btn-outline:hover {
    background: var(--tt-bg-hover);
    border-color: var(--tt-accent);
    color: var(--tt-accent);
}

.tt-btn-sm {
    padding: 0.3rem 0.75rem;
    font-size: 12px;
}

.tt-btn-block {
    width: 100%;
}

/* ===== FORMS ===== */
.tt-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.tt-form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--tt-text-muted);
}

.tt-input {
    background: var(--tt-bg-input);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius);
    padding: 0.55rem 0.875rem;
    font-size: 14px;
    color: var(--tt-text-main);
    width: 100%;
    transition: border-color 0.2s;
    outline: none;
}

.tt-input:focus {
    border-color: var(--tt-primary);
    box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.1);
}

textarea.tt-input {
    resize: vertical;
    min-height: 80px;
}

.tt-field-hint {
    font-size: 12px;
    color: var(--tt-text-muted);
}

.tt-form-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* ===== FILTER BAR ===== */
.tt-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--tt-border);
}

.tt-filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 40px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.tt-filter-chip i {
    font-size: 11px;
    color: var(--tt-text-muted);
}

.tt-filter-chip:hover {
    border-color: #cbcbc4;
    background: var(--tt-bg-hover);
}

.tt-filter-chip.active {
    background: var(--tt-primary);
    color: white;
    border-color: var(--tt-primary);
}

.tt-filter-chip.active i {
    color: white;
}

/* ===== PROJECTS GRID ===== */
.tt-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}

.tt-project-card {
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.15s;
}

.tt-project-card:hover {
    border-color: var(--tt-accent);
    box-shadow: var(--tt-shadow);
}

.tt-project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.tt-project-name {
    font-weight: 700;
    font-size: 16px;
}

.tt-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 30px;
    font-size: 11px;
    font-weight: 500;
}

.tt-status-progress {
    background: #fef3c7;
    color: #b45309;
}

.tt-status-review {
    background: #e0e7ff;
    color: #1e40af;
}

.tt-status-done {
    background: #dcfce7;
    color: #166534;
}

.tt-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 12px;
    color: var(--tt-text-muted);
    margin-bottom: 12px;
}

.tt-card-meta i {
    width: 14px;
    margin-right: 4px;
}

.tt-card-note {
    font-size: 13px;
    color: var(--tt-text-muted);
    padding-top: 12px;
    margin-top: 8px;
    border-top: 1px solid var(--tt-border);
}

/* ===== COLLABORATION TABS ===== */
.tt-collab-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--tt-border);
    margin-bottom: 24px;
}

.tt-collab-tab {
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--tt-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tt-collab-tab.active {
    color: var(--tt-primary);
    border-bottom-color: var(--tt-primary);
}

.tt-collab-panel {
    display: none;
}

.tt-collab-panel.active {
    display: block;
}

.tt-team-subtabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--tt-border);
}

.tt-subtab-btn {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--tt-text-muted);
    cursor: pointer;
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
}

.tt-subtab-btn.active {
    color: var(--tt-primary);
    border-bottom-color: var(--tt-primary);
}

.tt-team-subpanel {
    display: none;
}

.tt-team-subpanel.active {
    display: block;
}

/* ===== CHAT ===== */
.tt-chat-layout {
    display: flex;
    gap: 24px;
    height: calc(100vh - 340px);
    min-height: 400px;
}

.tt-chat-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tt-chat-sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--tt-border);
    font-weight: 600;
    font-size: 13px;
}

.tt-chat-conversation-list {
    flex: 1;
    overflow-y: auto;
}

.tt-chat-convo-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--tt-border);
    cursor: pointer;
    transition: background 0.1s;
}

.tt-chat-convo-item:hover {
    background: var(--tt-bg-hover);
}

.tt-chat-convo-item.active {
    background: var(--tt-bg-hover);
    border-left: 3px solid var(--tt-primary);
}

.tt-chat-convo-name {
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 4px;
}

.tt-chat-convo-preview {
    font-size: 11px;
    color: var(--tt-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tt-chat-sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--tt-border);
}

.tt-chat-main {
    flex: 1;
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.tt-chat-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--tt-border);
    font-weight: 600;
}

.tt-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tt-chat-message {
    display: flex;
    gap: 12px;
    max-width: 70%;
}

.tt-chat-message-outbound {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.tt-chat-message-outbound .tt-chat-message-bubble {
    background: var(--tt-primary);
    color: white;
}

.tt-chat-message-bubble {
    background: var(--tt-bg-hover);
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 13px;
}

.tt-chat-message-name {
    font-size: 10px;
    margin-bottom: 4px;
    color: var(--tt-text-muted);
}

.tt-chat-input-area {
    padding: 16px;
    border-top: 1px solid var(--tt-border);
    display: flex;
    gap: 12px;
}

.tt-chat-input-area input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--tt-border);
    border-radius: 40px;
    font-family: inherit;
    font-size: 13px;
    background: var(--tt-bg-input);
    color: var(--tt-text-main);
}

.tt-chat-input-area button {
    padding: 0 20px;
    background: var(--tt-primary);
    color: white;
    border: none;
    border-radius: 40px;
    cursor: pointer;
}

/* ===== ANNOUNCEMENTS ===== */
.tt-announcement-card {
    background: #fff9ef;
    border-left: 4px solid #b45309;
    margin-bottom: 16px;
}

[data-theme="dark"] .tt-announcement-card {
    background: rgba(180, 83, 9, 0.1);
}

.tt-announcement-title {
    font-weight: 700;
    margin-bottom: 4px;
}

.tt-announcement-date {
    font-size: 10px;
    color: #b45309;
    margin-bottom: 8px;
}

.tt-announcement-content {
    font-size: 13px;
    color: var(--tt-text-muted);
}

/* ===== CLIENT CARDS ===== */
.tt-client-card {
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 16px;
    cursor: pointer;
}

.tt-client-card:hover {
    border-color: var(--tt-accent);
}

.tt-client-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.tt-client-name {
    font-weight: 700;
    font-size: 16px;
}

.tt-stage-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 30px;
    font-size: 11px;
    font-weight: 500;
}

.tt-stage-discovery { background: #e0e7ff; color: #1e40af; }
.tt-stage-proposal { background: #fef3c7; color: #b45309; }
.tt-stage-active { background: #dcfce7; color: #166534; }
.tt-stage-review { background: #e0e7ff; color: #1e40af; }
.tt-stage-closed { background: #e8e6e1; color: #5a5a56; }

.tt-client-details {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: var(--tt-text-muted);
    margin-bottom: 12px;
}

.tt-client-note {
    font-size: 13px;
    color: var(--tt-text-muted);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--tt-border);
}

/* ===== RESOURCES GRID ===== */
.tt-resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.tt-resource-card {
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: 16px;
    padding: 18px;
}

.tt-resource-icon {
    width: 40px;
    height: 40px;
    background: var(--tt-bg-hover);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.tt-resource-title {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 6px;
}

.tt-resource-meta {
    font-size: 11px;
    color: var(--tt-text-muted);
    margin-bottom: 8px;
}

.tt-resource-link {
    font-size: 12px;
    color: var(--tt-primary);
    text-decoration: none;
}

.tt-resource-link:hover {
    text-decoration: underline;
}

/* ===== MODAL ===== */
.tt-modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.tt-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(3px);
}

.tt-modal-dialog {
    position: relative;
    background: var(--tt-bg-card);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--tt-shadow-lg);
    animation: tt-modal-in 0.25s ease-out;
}

.tt-modal-lg {
    max-width: 760px;
}

@keyframes tt-modal-in {
    from {
        opacity: 0;
        transform: scale(0.97) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.tt-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--tt-border);
    position: sticky;
    top: 0;
    background: var(--tt-bg-card);
}

.tt-modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.tt-modal-close {
    background: none;
    border: none;
    color: var(--tt-text-muted);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: var(--tt-radius-sm);
    font-size: 1rem;
}

.tt-modal-close:hover {
    background: var(--tt-bg-hover);
}

.tt-modal-body {
    padding: 1.5rem;
}

.tt-modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--tt-border);
}

.tt-modal-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--tt-border);
    margin-bottom: 1.5rem;
}

.tt-modal-tab {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--tt-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tt-modal-tab.active {
    color: var(--tt-primary);
    border-bottom-color: var(--tt-primary);
}

.tt-modal-tab-panel {
    display: none;
}

.tt-modal-tab-panel.active {
    display: block;
}

/* ===== AI SUGGESTION ===== */
.tt-ai-suggestion {
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    padding: 12px;
    margin-top: 12px;
    border-left: 3px solid var(--tt-primary);
}

.tt-ai-suggestion i {
    color: var(--tt-primary);
    margin-right: 6px;
}

/* ===== ACTIVITY FEED ===== */
.tt-activity-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--tt-border);
}

.tt-activity-item:last-child {
    border-bottom: none;
}

.tt-activity-icon {
    width: 32px;
    height: 32px;
    background: var(--tt-bg-hover);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tt-activity-icon.primary { background: rgba(26, 26, 26, 0.1); color: var(--tt-primary); }
.tt-activity-icon.warning { background: rgba(245, 158, 11, 0.1); color: var(--tt-warning); }

.tt-activity-content {
    flex: 1;
}

.tt-activity-text {
    font-size: 13px;
    line-height: 1.5;
}

.tt-activity-time {
    font-size: 10px;
    color: var(--tt-text-muted);
    margin-top: 4px;
}

/* ===== LOADING & EMPTY STATES ===== */
.tt-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 0.75rem;
    color: var(--tt-text-muted);
}

.tt-spinner {
    width: 28px;
    height: 28px;
    border: 2px solid var(--tt-border);
    border-top-color: var(--tt-primary);
    border-radius: 50%;
    animation: tt-spin 0.7s linear infinite;
}

@keyframes tt-spin {
    to {
        transform: rotate(360deg);
    }
}

.tt-empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--tt-text-muted);
}

.tt-empty-state i {
    font-size: 2.5rem;
    color: var(--tt-border);
    margin-bottom: 1rem;
    display: block;
}

.tt-empty-state h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--tt-text-main);
    margin-bottom: 0.5rem;
}

/* ===== UTILITIES ===== */
.tt-text-muted {
    color: var(--tt-text-muted) !important;
}

.tt-mt-2 { margin-top: 0.5rem; }
.tt-mt-4 { margin-top: 1rem; }
.tt-mt-6 { margin-top: 1.5rem; }
.tt-mb-4 { margin-bottom: 1rem; }

/* ===== TOAST NOTIFICATION ===== */
.tt-toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background: var(--tt-primary);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 40px;
    font-size: 13px;
    z-index: 1100;
    animation: tt-toast-in 0.25s ease-out;
}

@keyframes tt-toast-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .tt-sidebar {
        transform: translateX(-100%);
        z-index: 210;
    }
    .tt-sidebar.active {
        transform: translateX(0);
    }
    .tt-close-sidebar {
        display: block;
    }
    
    .tt-header {
        left: 0;
    }
    .tt-main-content {
        margin-left: 0;
    }
    .tt-mobile-toggle {
        display: block;
    }
    
    .tt-main-content-inner {
        padding: 1rem;
        padding-top: calc(64px + 1rem);
    }
    
    .tt-chat-layout {
        flex-direction: column;
        height: auto;
    }
    .tt-chat-sidebar {
        width: 100%;
        max-height: 300px;
    }
    .tt-chat-main {
        min-height: 400px;
    }
    
    .tt-projects-grid {
        grid-template-columns: 1fr;
    }
    
    .tt-resources-grid {
        grid-template-columns: 1fr;
    }
    
    .tt-stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}