/**
 * KruxoAI Mail Manager - Design System and Base CSS
 */

:root {
    --bg-main: #0d0d0d;
    --bg-sidebar: #121217;
    --bg-card: #181820;
    --bg-input: #101015;
    --border-color: #23232f;
    --border-hover: #343446;
    
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #5e6b7e;
    
    --accent-purple: #7c3aed;
    --accent-indigo: #6366f1;
    --accent-gradient: linear-gradient(135deg, #7c3aed, #6366f1);
    
    --state-success: #10b981;
    --state-error: #ef4444;
    --state-warning: #f59e0b;
    --state-info: #06b6d4;
    
    --sidebar-width: 260px;
    --header-height: 70px;
    --transition-speed: 0.2s;
    --border-radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

/* Dashboard layout requires fixed viewport - applied via body class */
body.dashboard-page {
    overflow: hidden;
    height: 100vh;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 13.5px;
    font-weight: 500;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    text-decoration: none;
    outline: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
}
.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.35);
    opacity: 0.95;
    transform: translateY(-1px);
}
.btn-primary:active {
    transform: translateY(1px);
}

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

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--state-error);
}
.btn-danger:hover {
    background: var(--state-error);
    color: #ffffff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
}

.btn-full {
    width: 100%;
}

.btn-icon-only {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.btn-icon-only:hover {
    color: var(--text-primary);
    background: var(--border-color);
}

/* Main Layout Grid */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* 1. LEFT SIDEBAR */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    height: var(--header-height);
    padding: 0 20px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--accent-gradient);
    color: white;
}

.brand-text h2 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.2;
}

.brand-text span {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 8px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin: 16px 12px 8px 12px;
}

.nav-item {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-speed) ease;
    margin-bottom: 4px;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-item.active {
    color: #ffffff;
    background-color: rgba(124, 58, 237, 0.12);
    border-left: 3px solid var(--accent-purple);
    border-radius: 0 8px 8px 0;
    padding-left: 9px;
}

.nav-icon-wrapper {
    display: inline-flex;
    align-items: center;
    color: var(--text-secondary);
}
.nav-item.active .nav-icon-wrapper {
    color: var(--accent-purple);
}

.nav-label {
    flex: 1;
    font-size: 13.5px;
    font-weight: 500;
}

.badge {
    background-color: var(--border-color);
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
}

.badge-primary {
    background-color: var(--accent-purple);
    color: #ffffff;
}

.avatar-circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    color: white;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.avatar-circle.small {
    width: 28px;
    height: 28px;
    font-size: 12px;
}

.account-disabled {
    opacity: 0.5;
}

.empty-sidebar-state {
    padding: 12px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-footer-links {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
}

.footer-link-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px;
    border-radius: 4px;
}
.footer-link-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* MAIN CONTENT CONTAINER */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--bg-main);
    overflow: hidden;
}

/* TOP BAR */
.top-bar {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-sidebar);
    flex-shrink: 0;
}

.active-inbox-title {
    font-size: 18px;
    font-weight: 600;
}

.sync-status {
    font-size: 12px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}

.status-indicator-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-indicator-dot.online {
    background-color: var(--state-success);
    box-shadow: 0 0 8px var(--state-success);
}
.status-indicator-dot.syncing {
    background-color: var(--state-warning);
    box-shadow: 0 0 8px var(--state-warning);
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.4; }
    100% { opacity: 1; }
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-email-badge {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.inbox-panels {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* 2. MIDDLE PANEL (Email List) */
.panel-email-list {
    width: 380px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    background-color: var(--bg-main);
    flex-shrink: 0;
}

.search-container {
    padding: 16px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 28px;
    color: var(--text-muted);
    width: 16px;
    height: 16px;
}

.search-container input {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px 10px 38px;
    color: var(--text-primary);
    font-size: 13.5px;
    outline: none;
    transition: all 0.2s;
}

.search-container input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.15);
}

.clear-search-btn {
    position: absolute;
    right: 28px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-tabs {
    display: flex;
    padding: 0 16px 12px 16px;
    border-bottom: 1px solid var(--border-color);
    gap: 4px;
}

.filter-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 6px 4px;
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    text-align: center;
}

.filter-tab:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.filter-tab.active {
    color: #ffffff;
    background-color: var(--border-color);
}

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

/* Email Item card */
.email-item {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.email-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.email-item.selected {
    background-color: rgba(124, 58, 237, 0.06);
}

.email-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--acc-color, transparent);
}

.email-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.email-item-sender {
    font-weight: 500;
    font-size: 13.5px;
    color: var(--text-primary);
    max-width: 70%;
}

.email-item.unread .email-item-sender {
    font-weight: 700;
}

.email-item-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.email-item-subject {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.email-item.unread .email-item-subject {
    font-weight: 700;
}

.email-item-snippet {
    font-size: 12.5px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.email-item-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.email-item-badge-acc {
    font-size: 10px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 2px 8px;
    border-radius: 12px;
    color: var(--text-secondary);
}

.unread-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-purple);
    border-radius: 50%;
    display: inline-block;
}

.star-icon-item {
    color: var(--state-warning);
    display: inline-flex;
    align-items: center;
    margin-right: 6px;
}

.pagination-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-sidebar);
}

/* Skeletons */
.skeleton-container {
    padding: 16px;
}
.skeleton-item {
    height: 90px;
    background: linear-gradient(90deg, #181820 25%, #23232f 50%, #181820 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 8px;
    margin-bottom: 12px;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Empty Inbox State */
.inbox-empty-state {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
}
.inbox-empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
}

/* 3. RIGHT PANEL (Email Reader) */
.panel-email-reader {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-sidebar);
    overflow: hidden;
}

.reader-empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    padding: 40px;
    text-align: center;
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--text-muted);
}

.reader-empty-state h3 {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.reader-empty-state p {
    font-size: 13.5px;
    max-width: 280px;
}

/* Content View */
.reader-content-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.reader-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-main);
    flex-shrink: 0;
}

.reader-subject-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.reader-subject {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.3;
}

.reader-meta-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.sender-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: white;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sender-details {
    flex: 1;
    min-width: 0;
}

.sender-name-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sender-name {
    font-weight: 600;
    color: var(--text-primary);
}

.sender-email {
    font-size: 12.5px;
    color: var(--text-secondary);
}

.recipient-row {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.recipient-email {
    color: var(--text-primary);
}

.reader-time-details {
    text-align: right;
    font-size: 12px;
    color: var(--text-secondary);
}

.reader-actions-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.reader-body {
    flex: 1;
    background-color: #ffffff; /* White background for email body is standard and readable */
    overflow: hidden;
    position: relative;
}

.reader-body iframe {
    width: 100%;
    height: 100%;
    border: none;
    background-color: #ffffff;
}

/* Reply Box */
.reader-reply-box {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-main);
    flex-shrink: 0;
}

.reply-box-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
}

.reply-icon {
    width: 16px;
    height: 16px;
}

.reply-box-body textarea {
    width: 100%;
    min-height: 80px;
    max-height: 200px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13.5px;
    outline: none;
    resize: vertical;
    transition: all 0.2s;
}

.reply-box-body textarea:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.15);
}

.reply-box-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 10px;
}

/* Top Progress Bar */
.top-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #7c3aed, #ec4899, #7c3aed);
    background-size: 200% 100%;
    width: 0%;
    z-index: 9999;
    transition: width 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
    animation: gradientShift 2s linear infinite;
}
@keyframes gradientShift {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}
.top-progress-bar.loading {
    opacity: 1;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: rgba(20, 20, 25, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 300px;
    max-width: 400px;
    animation: toastSlideIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    position: relative;
    overflow: hidden;
}

@keyframes toastSlideIn {
    0% { transform: translateX(120%) scale(0.9); opacity: 0; }
    100% { transform: translateX(0) scale(1); opacity: 1; }
}

@keyframes slideOutRight {
    0% { transform: translateX(0) scale(1); opacity: 1; }
    100% { transform: translateX(120%) scale(0.9); opacity: 0; }
}

.toast::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: inherit;
    width: 100%;
    animation: toastProgress 5s linear forwards;
    opacity: 0.7;
}

@keyframes toastProgress {
    0% { width: 100%; }
    100% { width: 0%; }
}

.toast-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}

.toast.toast-success .toast-icon {
    color: var(--state-success);
    background: rgba(16, 185, 129, 0.15);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.2);
}
.toast.toast-success::after { background: var(--state-success); }

.toast.toast-error .toast-icon {
    color: var(--state-error);
    background: rgba(239, 68, 68, 0.15);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.2);
}
.toast.toast-error::after { background: var(--state-error); }

.toast.toast-warning .toast-icon {
    color: var(--state-warning);
    background: rgba(245, 158, 11, 0.15);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
}
.toast.toast-warning::after { background: var(--state-warning); }

.toast.toast-info .toast-icon {
    color: #3b82f6;
    background: rgba(59, 130, 246, 0.15);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.2);
}
.toast.toast-info::after { background: #3b82f6; }

.toast-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toast-title {
    font-weight: 600;
    font-size: 14px;
    color: #fff;
    letter-spacing: -0.01em;
}

.toast-message {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    margin-left: -4px;
}

.toast-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}/* Utility Classes */
.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hide {
    display: none !important;
}

.text-center { text-align: center; }
.text-danger { color: var(--state-error) !important; }
.text-warning { color: var(--state-warning) !important; }
.text-success { color: var(--state-success) !important; }

/* Responsive adjustments */
@media (max-width: 1024px) {
    .panel-email-list {
        width: 320px;
    }
}

.btn-mobile-menu, .btn-mobile-back, .btn-mobile-close-sidebar {
    display: none;
}
@media (max-width: 768px) {
    .app-layout {
        position: relative;
    }
    
    /* Off-canvas sidebar */
    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 4px 0 24px rgba(0,0,0,0.5);
    }
    .sidebar.open {
        left: 0;
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(2px);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    .sidebar-overlay.show {
        opacity: 1;
        pointer-events: auto;
    }

    /* Master-Detail Panels */
    .inbox-panels {
        flex-direction: row; /* Keep side by side but hide one */
    }
    
    .panel-email-list {
        width: 100%;
        border-right: none;
        display: flex;
    }
    
    .panel-email-reader {
        display: none;
        position: absolute;
        top: 0; left: 0; width: 100%; height: 100%;
        z-index: 50;
    }

    /* When email is selected on mobile */
    .inbox-panels.mobile-view-reader .panel-email-list {
        display: none;
    }
    .inbox-panels.mobile-view-reader .panel-email-reader {
        display: flex;
    }
    
    /* Top Bar Mobile Adjustments */
    .top-bar {
        padding: 0 16px;
    }
    .btn-mobile-menu {
        display: inline-flex !important;
        margin-right: 12px;
    }
    .btn-mobile-back {
        display: inline-flex !important;
        margin-right: 12px;
    }
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    width: 600px;
    max-width: 90vw;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    color: var(--text-primary);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
}

/* Notifications Dropdown */
.notification-badge {
    position: absolute;
    top: 2px;
    right: 4px;
    background: var(--state-error);
    color: white;
    font-size: 9px;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 10px;
    box-shadow: 0 0 0 2px var(--bg-sidebar);
}

.notification-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 340px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow: hidden;
}

.notification-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.notification-header h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.notification-body {
    max-height: 380px;
    overflow-y: auto;
}

.empty-notifs {
    padding: 30px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.notif-item {
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

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

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

.notif-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.notif-item-sender {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
}

.notif-item-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.notif-item-subject {
    font-size: 12px;
    color: var(--text-secondary);
}

/* AI replies, Billing tabs and Health Gauge CSS additions */
.cleanup-tab {
    transition: all 0.2s ease;
}
.cleanup-tab:hover {
    color: #fff !important;
}
.cleanup-tab.active {
    border-bottom: 2px solid var(--accent-purple) !important;
    color: #fff !important;
}
.btn-ai-tone {
    background: #1d1d26;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.2s ease;
}
.btn-ai-tone:hover {
    background: var(--accent-purple);
    color: #fff;
    border-color: var(--accent-purple);
    transform: translateY(-1px);
}
.btn-ai-tone:active {
    transform: translateY(1px);
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.syncing {
    animation: spin 1s linear infinite;
}
.email-item-badge-cat {
    transition: all 0.2s ease;
}
.email-item-badge-cat:hover {
    opacity: 0.8;
}
.health-score-widget {
    box-shadow: 0 4px 10px rgba(52, 211, 153, 0.02);
}
.tier-override-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    transition: border 0.2s;
}
.tier-override-select:hover {
    border-color: var(--border-hover);
}
#billing-upgrade-form select, 
#billing-upgrade-form input[type="file"] {
    transition: border 0.2s;
}
#billing-upgrade-form select:focus, 
#billing-upgrade-form input[type="file"]:focus {
    border-color: var(--accent-purple) !important;
}

/* =========================================================
   MOBILE RESPONSIVENESS
   ========================================================= */

@media (max-width: 991px) {
    /* Top Bar Mobile Tweaks */
    .btn-mobile-menu, .btn-mobile-close-sidebar {
        display: inline-flex !important;
    }
    .desktop-only {
        display: none !important;
    }
    .mobile-only {
        display: inline-flex !important;
    }
    input.mobile-only {
        display: block !important;
    }
    
    /* Gmail Style Top Bar Pill */
    .top-bar {
        padding: 8px 16px;
        min-height: 64px;
        background: var(--bg-main);
        border: none;
    }
    .top-bar-left.mobile-search-pill {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: var(--bg-sidebar);
        border-radius: 30px;
        padding: 4px 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }
    .mobile-hide-text {
        display: none !important;
    }
    .mobile-flex-row {
        display: flex;
        gap: 8px;
    }
    .mobile-flex-row .btn {
        flex: 1;
        justify-content: center;
        padding: 6px;
        min-height: 36px;
    }
    .mobile-flex-row .btn svg {
        width: 16px;
        height: 16px;
    }
    #btn-compose-new {
        padding: 8px !important;
        font-size: 13px !important;
        min-height: 38px;
    }
    #btn-compose-new svg {
        width: 16px;
        height: 16px;
    }
    .health-score-widget {
        padding: 8px !important;
        margin-bottom: 8px !important;
    }
    #btn-check-health {
        padding: 4px 8px !important;
        font-size: 11px !important;
    }
    #btn-check-health svg {
        width: 12px !important;
        height: 12px !important;
    }
    
    /* Sidebar as a Slide-Out Drawer */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    /* Overlay for Sidebar */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(2px);
        z-index: 90;
        transition: opacity 0.3s ease;
    }
    .sidebar-overlay.hide {
        display: none;
    }

    /* Inbox Panels (Email List + Reader) Mobile Swap Flow */
    .inbox-panels {
        flex-direction: column;
    }
    
    .panel-email-list {
        width: 100% !important;
        border-right: none;
        height: calc(100vh - 60px);
    }
    
    /* Reader is hidden by default on mobile */
    .panel-email-reader {
        display: none;
        width: 100% !important;
        height: calc(100vh - 60px);
        border-radius: 0;
        margin: 0;
    }
    
    /* When an email is opened on mobile, swap views */
    .mobile-view-reader .panel-email-list {
        display: none !important;
    }
    .mobile-view-reader .panel-email-reader {
        display: flex !important;
    }

    .btn-mobile-back {
        display: inline-flex !important;
        margin-right: 8px;
    }
    
    /* Mobile Reader Actions (Icon-only, Gmail-style) */
    .reader-actions-bar {
        padding: 8px 0;
        gap: 4px;
        justify-content: space-between;
        border-top: 1px solid var(--border-color);
        margin-top: 8px;
    }
    .reader-actions-bar .btn-icon {
        flex: 1;
        padding: 10px 0;
        display: flex;
        justify-content: center;
        border: none;
        background: transparent;
        color: var(--text-secondary);
        box-shadow: none;
    }
    .reader-actions-bar .btn-icon:hover {
        background: rgba(255,255,255,0.05);
    }
    .reader-actions-bar .btn-icon i {
        width: 20px;
        height: 20px;
    }
    .reader-actions-bar .action-text {
        display: none !important;
    }
}

@media (min-width: 992px) {
    .btn-mobile-menu, .btn-mobile-close-sidebar, .btn-mobile-back {
        display: none !important;
    }
}