/* ============================================================
   perx.fans - Privacy-First Collective Intelligence
   Dark Theme Design System
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Backgrounds */
    --bg-deepest: #06060f;
    --bg-deep: #0a0a1a;
    --bg-base: #0f0f2a;
    --bg-elevated: #1a1a3e;
    --bg-surface: #22224a;
    --bg-hover: #2a2a58;

    /* Glass */
    --glass-bg: rgba(15, 15, 42, 0.7);
    --glass-bg-light: rgba(26, 26, 62, 0.5);
    --glass-border: rgba(99, 102, 241, 0.15);
    --glass-border-light: rgba(139, 92, 246, 0.1);

    /* Accent */
    --accent-indigo: #6366f1;
    --accent-purple: #8b5cf6;
    --accent-violet: #a78bfa;
    --accent-blue: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --accent-glow-strong: rgba(99, 102, 241, 0.6);

    /* Text */
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-faint: #475569;

    /* Semantic */
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --info: #3b82f6;

    /* PII */
    --pii-detected: #ef4444;
    --pii-detected-bg: rgba(239, 68, 68, 0.15);
    --pii-replaced: #22c55e;
    --pii-replaced-bg: rgba(34, 197, 94, 0.15);

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 60px;
    --input-area-min-height: 80px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
    --shadow-glow-strong: 0 0 40px rgba(99, 102, 241, 0.25);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-deepest);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
    overflow: hidden;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-faint);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-hover) transparent;
}

/* --- Selection --- */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
}

/* --- Focus --- */
:focus-visible {
    outline: 2px solid var(--accent-indigo);
    outline-offset: 2px;
}

/* --- Keyboard kbd --- */
kbd {
    display: inline-block;
    padding: 2px 6px;
    font-size: 0.75rem;
    font-family: inherit;
    color: var(--text-muted);
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    line-height: 1.4;
}


/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-right: 1px solid var(--glass-border);
    z-index: 100;
    transition: transform var(--transition-slow);
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.4));
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.15rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-tagline {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Navigation --- */
.sidebar-nav {
    padding: 12px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
    font-family: inherit;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--glass-bg-light);
}

.nav-item.active {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.12);
    box-shadow: inset 3px 0 0 var(--accent-indigo);
}

.nav-item.active svg {
    stroke: var(--accent-indigo);
}

/* --- Sidebar Stats --- */
.sidebar-stats {
    margin: auto 16px 0 16px;
    padding: 16px;
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
}

.sidebar-stats-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.mini-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}

.mini-stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mini-stat-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-violet);
    font-variant-numeric: tabular-nums;
}

/* --- Sidebar Footer --- */
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--glass-border);
    margin-top: 12px;
}

.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--success);
    background: var(--success-bg);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 20px;
    margin-bottom: 8px;
}

.privacy-badge svg {
    stroke: var(--success);
}

.privacy-message {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.5;
}


/* ============================================================
   MOBILE MENU TOGGLE
   ============================================================ */
.menu-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 200;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--bg-elevated);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 90;
}


/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-width: 0;
    position: relative;
}

.view {
    display: none;
    flex-direction: column;
    height: 100%;
}

.view.active {
    display: flex;
}

/* --- Generic View Header --- */
.view-header {
    padding: 28px 32px 20px;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.view-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.view-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}


/* ============================================================
   CHAT VIEW
   ============================================================ */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    border-bottom: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-shrink: 0;
}

.chat-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.chat-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: 12px;
}

.chat-header-left {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* --- Messages --- */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

.message {
    display: flex;
    max-width: 800px;
    width: 100%;
    animation: fadeSlideUp 0.4s ease-out;
}

.message.user {
    align-self: flex-end;
    justify-content: flex-end;
}

.message.assistant {
    align-self: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 14px 18px;
    border-radius: var(--border-radius-lg);
    line-height: 1.65;
    font-size: 0.92rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message.user .message-bubble {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.15);
}

.message.assistant .message-bubble {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

/* --- Message Content Formatting --- */
.message-content {
    overflow-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
    color: inherit;
}

.message-content em {
    font-style: italic;
    color: inherit;
    opacity: 0.9;
}

.message-content code {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.85em;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--accent-violet);
}

.message.user .message-content code {
    background: rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.95);
}

.message-content pre {
    margin: 8px 0;
    padding: 14px 16px;
    background: var(--bg-deepest);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
}

.message-content pre code {
    padding: 0;
    background: none;
    color: var(--text-primary);
    font-size: 0.84em;
    line-height: 1.6;
}

/* --- Message Sources --- */
.message-sources {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.sources-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: 4px;
}

.source-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    font-size: 0.72rem;
    color: var(--text-secondary);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 20px;
}

.source-score {
    color: var(--accent-violet);
    font-weight: 600;
}

/* --- Web Sources --- */
.web-sources {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.web-source-link {
    display: inline-block;
    font-size: 0.78rem;
    color: var(--accent-cyan);
    text-decoration: none;
    padding: 2px 0;
    transition: color 0.2s;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.web-source-link:hover {
    color: var(--accent-violet);
    text-decoration: underline;
}

/* --- Search Status Indicator --- */
.search-status {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.search-status .typing-dots {
    font-size: 0.85rem;
    color: var(--text-muted);
    min-width: 30px;
}

.search-status-icon {
    font-size: 0.9rem;
}

/* --- Token Usage Badge --- */
.message-tokens {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    gap: 8px;
}

.token-badge {
    font-size: 0.65rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.04);
    padding: 2px 8px;
    border-radius: 10px;
    letter-spacing: 0.03em;
}

/* --- Typing Indicator --- */
.typing-indicator {
    display: flex;
    padding: 4px 0;
    align-items: center;
}

.typing-dots {
    display: inline-block;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-indigo);
    min-width: 40px;
}

/* --- Chat Input Area --- */
.chat-input-area {
    padding: 16px 32px 20px;
    border-top: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-shrink: 0;
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 8px 8px 8px 18px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-glow);
}

#chat-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.92rem;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    max-height: 200px;
    outline: none;
    padding: 6px 0;
}

#chat-input::placeholder {
    color: var(--text-faint);
}

.send-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    border: none;
    border-radius: var(--border-radius);
    color: #fff;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.send-btn:hover:not(:disabled) {
    box-shadow: var(--shadow-glow-strong);
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.input-hint {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-faint);
    margin-top: 8px;
}


/* ============================================================
   UPLOAD VIEW
   ============================================================ */
.upload-zone {
    margin: 24px 32px;
    padding: 48px 32px;
    border: 2px dashed var(--glass-border);
    border-radius: var(--border-radius-xl);
    background: var(--glass-bg-light);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-glow);
}

.upload-zone:hover::before,
.upload-zone.drag-over::before {
    opacity: 1;
}

.upload-zone.drag-over {
    background: rgba(99, 102, 241, 0.08);
    transform: scale(1.01);
}

.upload-zone-content {
    position: relative;
    z-index: 1;
}

.upload-icon-group {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.upload-icon-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--accent-violet);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.upload-zone:hover .upload-icon-item {
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(99, 102, 241, 0.15);
}

.upload-zone-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.upload-zone-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.upload-zone-formats {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 18px;
}

.upload-btn {
    padding: 10px 28px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.upload-btn:hover {
    box-shadow: var(--shadow-glow-strong);
    transform: translateY(-1px);
}

/* --- Pipeline Info --- */
.upload-pipeline-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 32px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.pipeline-step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
}

.pipeline-step-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    border-radius: 50%;
}

.pipeline-step-text {
    display: flex;
    flex-direction: column;
}

.pipeline-step-text strong {
    font-size: 0.8rem;
    color: var(--text-primary);
}

.pipeline-step-text span {
    font-size: 0.68rem;
    color: var(--text-muted);
}

.pipeline-arrow {
    color: var(--text-faint);
    flex-shrink: 0;
}

/* --- Upload List --- */
.upload-list {
    padding: 0 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
    flex: 1;
}

.upload-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.upload-item:hover {
    border-color: rgba(99, 102, 241, 0.2);
}

.upload-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.upload-item-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.upload-item-details {
    min-width: 0;
}

.upload-item-name {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 280px;
}

.upload-item-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.upload-item-status {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.upload-progress {
    width: 80px;
    height: 4px;
    background: var(--bg-surface);
    border-radius: 2px;
    overflow: hidden;
}

.upload-progress-bar {
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-indigo), var(--accent-purple));
    border-radius: 2px;
    transition: width 0.6s ease;
    animation: progress-indeterminate 1.5s ease-in-out infinite;
}

.upload-progress-bar[style*="width: 100%"] {
    animation: none;
}

@keyframes progress-indeterminate {
    0% { transform: translateX(-100%); width: 60%; }
    50% { transform: translateX(40%); width: 60%; }
    100% { transform: translateX(200%); width: 60%; }
}

.status-text {
    font-size: 0.78rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.status-text.status-preview {
    color: var(--accent-violet);
}

.status-text.status-approved {
    color: var(--success);
}

.status-text.status-rejected {
    color: var(--danger);
}

.status-text.status-error {
    color: var(--danger);
}

.review-btn {
    padding: 5px 14px;
    font-size: 0.78rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--accent-indigo);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.review-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-indigo);
}


/* ============================================================
   KNOWLEDGE VIEW
   ============================================================ */
.knowledge-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    padding: 24px 32px;
}

.stat-card {
    padding: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 4px;
}

/* --- Knowledge Search --- */
.knowledge-search {
    padding: 0 32px 16px;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-faint);
    pointer-events: none;
}

#knowledge-search-input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    outline: none;
    transition: all var(--transition-fast);
}

#knowledge-search-input::placeholder {
    color: var(--text-faint);
}

#knowledge-search-input:focus {
    border-color: var(--accent-indigo);
    box-shadow: var(--shadow-glow);
}

/* --- Knowledge Results --- */
.knowledge-results {
    padding: 0 32px 24px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.knowledge-result {
    display: flex;
    gap: 16px;
    padding: 16px 18px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    animation: fadeSlideUp 0.3s ease-out;
}

.result-score {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-indigo);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--border-radius-sm);
}

.result-content {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.no-results {
    text-align: center;
    padding: 32px;
    font-size: 0.9rem;
    color: var(--text-muted);
}


/* ============================================================
   PII REVIEW MODAL
   ============================================================ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    width: 100%;
    max-width: 720px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-base);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.modal-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--text-muted);
    background: none;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

/* --- PII Report --- */
.pii-report {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--pii-detected-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius);
}

.pii-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 8px;
}

.pii-stat-number {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--pii-detected);
}

.pii-stat-label {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.pii-type-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: 0.75rem;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: 20px;
}

.pii-type {
    color: var(--pii-detected);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.pii-count {
    color: var(--text-secondary);
    font-weight: 500;
}

.pii-preview-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.pii-preview-text {
    width: 100%;
    min-height: 240px;
    padding: 16px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.84rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-deepest);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    resize: vertical;
    outline: none;
    transition: border-color var(--transition-fast);
}

.pii-preview-text:focus {
    border-color: var(--accent-indigo);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    flex-shrink: 0;
}

/* --- Buttons --- */
.btn {
    padding: 10px 22px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-approve {
    color: #fff;
    background: linear-gradient(135deg, #16a34a, #22c55e);
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.25);
}

.btn-approve:hover {
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.35);
    transform: translateY(-1px);
}

.btn-reject {
    color: var(--danger);
    background: var(--danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-reject:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.35);
}


/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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


/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .sidebar-overlay {
        display: block;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
    }

    .sidebar.open ~ .sidebar-overlay,
    .sidebar.open + .sidebar-overlay {
        opacity: 1;
        pointer-events: auto;
    }

    /* If sidebar-overlay is a sibling that comes after sidebar */
    body:has(.sidebar.open) .sidebar-overlay {
        opacity: 1;
        pointer-events: auto;
    }

    .menu-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .chat-header {
        padding: 16px 16px 16px 60px;
    }

    .chat-messages {
        padding: 16px;
    }

    .chat-input-area {
        padding: 12px 16px 16px;
    }

    .chat-subtitle {
        display: none;
    }

    .view-header {
        padding: 20px 16px 16px 60px;
    }

    .upload-zone {
        margin: 16px;
        padding: 32px 16px;
    }

    .upload-pipeline-info {
        padding: 0 16px;
        gap: 4px;
    }

    .pipeline-arrow {
        display: none;
    }

    .pipeline-step {
        flex: 1;
        min-width: 130px;
    }

    .upload-list {
        padding: 0 16px 16px;
    }

    .upload-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .upload-item-status {
        width: 100%;
    }

    .upload-item-name {
        max-width: 200px;
    }

    .knowledge-stats {
        padding: 16px;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .knowledge-search {
        padding: 0 16px 12px;
    }

    .knowledge-results {
        padding: 0 16px 16px;
    }

    .message-bubble {
        max-width: 92%;
    }

    .modal-content {
        max-width: 100%;
        max-height: 90vh;
        border-radius: var(--border-radius-lg);
    }

    .modal-overlay {
        padding: 12px;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
        text-align: center;
    }

    .input-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .upload-icon-group {
        gap: 4px;
    }

    .upload-icon-item {
        width: 40px;
        height: 40px;
        font-size: 0.6rem;
    }

    .knowledge-stats {
        grid-template-columns: 1fr 1fr;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* --- Large screens: wider chat --- */
@media (min-width: 1200px) {
    .message {
        max-width: 900px;
    }

    .chat-messages {
        padding: 24px 48px;
    }

    .chat-input-area {
        padding: 16px 48px 24px;
    }
}

@media (min-width: 1600px) {
    .chat-messages {
        padding: 32px 80px;
    }

    .chat-input-area {
        padding: 16px 80px 28px;
    }
}


/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}