/* Corporate AI Chat — Professional Dark v2.1 */

/* ===== FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Surface hierarchy */
    --bg-0: #0c0f14;
    --bg-1: #111419;
    --bg-2: #181c23;
    --bg-3: #1f2430;
    --bg-4: #272d3a;
    --bg-hover: #252b38;

    /* Text hierarchy */
    --text-0: #f0f2f5;
    --text-1: #c9cdd4;
    --text-2: #8b919e;
    --text-3: #5c6370;

    /* Accents */
    --accent: #4a9eff;
    --accent-soft: rgba(74, 158, 255, 0.12);
    --accent-hover: #6bb3ff;
    --accent-text: #4a9eff;

    /* Semantic */
    --success: #34d399;
    --success-soft: rgba(52, 211, 153, 0.12);
    --warning: #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.12);
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.12);

    /* Layout */
    --border: #1e2330;
    --border-light: #2a3040;
    --sidebar-w: 272px;
    --radius: 8px;
    --radius-lg: 12px;

    /* Message backgrounds */
    --user-bg: rgba(74, 158, 255, 0.06);
    --assistant-bg: transparent;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
    --bg-0: #f5f5f7;
    --bg-1: #ffffff;
    --bg-2: #f0f0f2;
    --bg-3: #e5e5ea;
    --bg-4: #d1d1d6;
    --bg-hover: #e8e8ed;
    --text-0: #1d1d1f;
    --text-1: #3a3a3c;
    --text-2: #6e6e73;
    --text-3: #8e8e93;
    --accent: #3478f6;
    --accent-soft: rgba(52, 120, 246, 0.1);
    --accent-hover: #2563eb;
    --accent-text: #3478f6;
    --success: #30d158;
    --success-soft: rgba(48, 209, 88, 0.1);
    --warning: #ff9f0a;
    --warning-soft: rgba(255, 159, 10, 0.1);
    --danger: #ff453a;
    --danger-soft: rgba(255, 69, 58, 0.1);
    --border: #d1d1d6;
    --border-light: #e5e5ea;
    --user-bg: rgba(52, 120, 246, 0.05);
    --assistant-bg: transparent;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

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

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-0);
    color: var(--text-0);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-text); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ===== APP LAYOUT ===== */
.app-layout { display: flex; height: 100vh; }

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

.sidebar-header {
    padding: 16px;
}

.btn-new-chat {
    width: 100%;
    padding: 9px 14px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.15s, box-shadow 0.15s;
    box-shadow: 0 1px 3px rgba(74,158,255,0.2);
}
.btn-new-chat:hover { background: var(--accent-hover); box-shadow: 0 2px 8px rgba(74,158,255,0.3); color: #fff; }
.btn-new-chat svg { width: 15px; height: 15px; stroke-width: 2.5; }

.sidebar-chats {
    flex: 1;
    overflow-y: auto;
    padding: 4px 8px;
}

#chat-search:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.search-no-results { text-align: center; padding: 24px 8px; color: var(--text-3); font-size: 12px; }
.btn-export:hover { border-color: var(--accent) !important; color: var(--accent) !important; }

.chat-group-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 16px 8px 6px;
}

.chat-item {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-2);
    text-decoration: none;
    transition: all 0.12s;
    margin-bottom: 1px;
    gap: 8px;
}
.chat-item:hover { background: var(--bg-hover); color: var(--text-1); }
.chat-item.active { background: var(--accent-soft); color: var(--accent-text); }

.chat-item-icon { flex-shrink: 0; opacity: 0.5; }
.chat-item.active .chat-item-icon { opacity: 1; }

.chat-item-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item .chat-item-actions {
    display: flex;
    gap: 2px;
    opacity: 0;
    margin-left: auto;
    flex-shrink: 0;
}
.chat-item:hover .chat-item-actions { opacity: 1; }

.chat-item .pin-chat {
    color: var(--text-3);
    cursor: pointer;
    padding: 3px;
    border-radius: 4px;
    display: flex;
    transition: all 0.12s;
}
.chat-item .pin-chat:hover { color: var(--accent); background: var(--accent-soft); }
.chat-item .pin-chat.pinned { opacity: 1; color: var(--accent); }
/* Always show pin icon if pinned, even without hover */
.chat-item:has(.pin-chat.pinned) .chat-item-actions { opacity: 1; }
.chat-item:has(.pin-chat.pinned) .delete-chat { opacity: 0; }
.chat-item:has(.pin-chat.pinned):hover .delete-chat { opacity: 1; }

.chat-item .delete-chat {
    color: var(--text-3);
    cursor: pointer;
    padding: 3px;
    flex-shrink: 0;
    border-radius: 4px;
    display: flex;
    transition: all 0.12s;
}
.chat-item .delete-chat:hover { color: var(--danger); background: var(--danger-soft); }

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

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-2);
}
.sidebar-user .user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--bg-4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-2);
}
.sidebar-user .user-role {
    font-size: 10px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-actions {
    display: flex;
    align-items: center;
    gap: 2px;
}
.sidebar-actions a {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    color: var(--text-3);
    transition: all 0.12s;
}
.sidebar-actions a:hover { background: var(--bg-3); color: var(--text-1); }

/* ===== MAIN CHAT ===== */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Chat header */
.chat-header {
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    background: var(--bg-1);
}

.model-selector {
    background: var(--bg-3);
    color: var(--text-1);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 0.15s;
}
.model-selector:focus { outline: none; border-color: var(--accent); }
.model-selector option { background: var(--bg-2); }

.chat-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-2);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== MESSAGES ===== */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px 0;
}

.messages-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.message {
    margin-bottom: 8px;
    display: flex;
    gap: 14px;
    padding: 16px 0;
}

.message + .message { border-top: 1px solid var(--border); }

.message-avatar {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--text-2);
}
.message.user .message-avatar { background: var(--accent-soft); color: var(--accent); }
.message.assistant .message-avatar { background: var(--bg-3); color: var(--success); }

.message-content {
    flex: 1;
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-1);
    overflow-wrap: break-word;
    word-break: break-word;
}

.message.user .message-content { color: var(--text-0); }

/* Markdown rendering */
.message-content p { margin-bottom: 12px; }
.message-content p:last-child { margin-bottom: 0; }
.message-content h2, .message-content h3, .message-content h4 {
    margin: 20px 0 8px;
    color: var(--text-0);
}
.message-content h2 { font-size: 17px; }
.message-content h3 { font-size: 15px; }
.message-content h4 { font-size: 14px; font-weight: 600; }

.message-content pre {
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 14px 16px;
    overflow-x: auto;
    margin: 12px 0;
    font-size: 13px;
    line-height: 1.55;
}
.message-content code {
    background: var(--bg-3);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12.5px;
    font-family: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', monospace;
}
.message-content pre code { background: none; padding: 0; font-size: 13px; }

.message-content ul, .message-content ol { margin: 8px 0; padding-left: 22px; }
.message-content li { margin-bottom: 4px; }
.message-content hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.message-content a { color: var(--accent-text); }
.message-content a:hover { text-decoration: underline; }
.message-content strong { color: var(--text-0); font-weight: 600; }

.message-meta {
    font-size: 11px;
    color: var(--text-3);
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--text-3);
    gap: 12px;
}
.empty-state-icon { color: var(--text-3); opacity: 0.3; }
.empty-state-text { font-size: 14px; }

/* Streaming */
.streaming-cursor::after {
    content: '▎';
    animation: blink 0.8s infinite;
    color: var(--accent);
    font-weight: 300;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ===== INPUT AREA ===== */
.input-area {
    padding: 16px 24px 24px;
    flex-shrink: 0;
    background: linear-gradient(transparent, var(--bg-0) 20%);
}

.input-wrapper {
    max-width: 960px;
    margin: 0 auto;
}

.file-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0 0 8px;
}
.file-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-3);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12px;
    color: var(--text-2);
}
.file-chip .remove {
    cursor: pointer;
    color: var(--text-3);
    display: flex;
}
.file-chip .remove:hover { color: var(--danger); }

.input-box {
    display: flex;
    align-items: flex-end;
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 8px 10px 8px 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-0);
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    max-height: 200px;
    min-height: 22px;
    padding: 6px 0;
    outline: none;
    font-family: inherit;
}
#message-input::placeholder { color: var(--text-3); }

.input-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    padding-bottom: 2px;
}

.btn-icon {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-3);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.12s;
}
.btn-icon:hover { background: var(--bg-4); color: var(--text-1); }

.btn-send {
    background: var(--accent);
    color: #fff;
    border-radius: 8px;
    width: 34px;
    height: 34px;
}
.btn-send:hover { background: var(--accent-hover); color: #fff; }
.btn-send:disabled { opacity: 0.3; cursor: not-allowed; }

/* ===== MOBILE ===== */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 110;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-light);
    background: var(--bg-2);
    color: var(--text-1);
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 99;
    backdrop-filter: blur(2px);
}
.sidebar-overlay.active { display: block; }

/* ===== AGENT SELECT ===== */
.agent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}
.agent-card {
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 20px;
    cursor: pointer;
    transition: all 0.15s;
}
.agent-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.agent-card .agent-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-4);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 20px;
    color: var(--accent);
}
.agent-card .agent-name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.agent-card .agent-desc { font-size: 12px; color: var(--text-2); line-height: 1.4; }

/* ===== LOGIN ===== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-0);
}
.login-box {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-lg);
}
.login-logo {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: var(--accent-soft);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}
.login-box h1 { text-align: center; margin-bottom: 4px; font-size: 20px; font-weight: 600; }
.login-box .subtitle { text-align: center; color: var(--text-3); margin-bottom: 28px; font-size: 13px; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    margin-bottom: 6px;
    letter-spacing: 0.2px;
}
.form-input {
    width: 100%;
    padding: 9px 12px;
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    color: var(--text-0);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.btn-primary {
    width: 100%;
    padding: 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
    padding: 8px 16px;
    background: var(--bg-3);
    color: var(--text-1);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.12s;
}
.btn-secondary:hover { background: var(--bg-4); border-color: var(--text-3); }

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.alert-error { background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(248,113,113,0.2); }
.alert-success { background: var(--success-soft); color: var(--success); border: 1px solid rgba(52,211,153,0.2); }

/* ===== ADMIN ===== */
.admin-layout {
    max-width: 1140px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
}
/* Allow scrolling on admin/agent pages */
body:has(.admin-layout) {
    overflow-y: auto;
    height: auto;
}
.admin-layout h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.admin-layout h1 svg { color: var(--text-3); }

.admin-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    padding: 4px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    flex-wrap: wrap;
}
.admin-nav a {
    padding: 7px 14px;
    border-radius: 6px;
    color: var(--text-2);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.12s;
    display: flex;
    align-items: center;
    gap: 6px;
}
.admin-nav a:hover { background: var(--bg-3); color: var(--text-0); }
.admin-nav a.active { background: var(--accent); color: #fff; }
.admin-nav a svg { width: 15px; height: 15px; }

.admin-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
}
.admin-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-1);
}

/* Stats cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
}
.stat-card .stat-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}
.stat-card .stat-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}
.stat-card .stat-value { font-size: 24px; font-weight: 700; }

/* Data tables */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13px;
}
.data-table th {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-3);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-1);
}
.data-table tr:hover td { background: var(--bg-hover); }
.data-table code { font-size: 11px; padding: 2px 6px; background: var(--bg-3); border-radius: 4px; }

/* Provider badge */
.provider-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-1);
}
.provider-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--badge-color);
}

/* Status indicator */
.status-active { color: var(--success); display: flex; align-items: center; gap: 5px; font-size: 12px; }
.status-blocked { color: var(--danger); display: flex; align-items: center; gap: 5px; font-size: 12px; }

/* Action buttons row */
.action-btns { display: flex; gap: 4px; }
.action-btn {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-light);
    background: var(--bg-2);
    color: var(--text-2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.12s;
    font-size: 12px;
}
.action-btn:hover { background: var(--bg-4); color: var(--text-0); border-color: var(--text-3); }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    overflow-y: auto;
    padding: 40px 20px;
    backdrop-filter: blur(3px);
}
.modal-overlay.active { display: block; }
.modal-box {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-lg);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; font-weight: 600; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .mobile-menu-toggle { display: flex; }
    .sidebar {
        position: fixed;
        z-index: 100;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }
    .sidebar.open { transform: translateX(0); }
    .chat-header { padding-left: 52px; }
    .messages-inner { padding: 0 14px; }
    .input-area { padding: 12px 14px 16px; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
}

/* === v2.1: Message action buttons (copy, regenerate) === */
.message-actions {
    display: flex;
    gap: 2px;
    margin-top: 6px;
    opacity: 0;
    transition: opacity 0.15s;
}
.message:hover .message-actions { opacity: 1; }
.msg-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-3);
    font-size: 12px;
    font-family: inherit;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.12s;
}
.msg-action-btn:hover {
    background: var(--bg-3);
    border-color: var(--border-light);
    color: var(--text-1);
}
.msg-action-btn.copied { color: var(--success); }
.msg-action-btn span { pointer-events: none; }

/* === v2.0: Code blocks with copy button === */
.code-block {
    position: relative;
    margin: 12px 0;
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    overflow: hidden;
}
.code-block pre {
    margin: 0;
    border: none;
    border-radius: 0;
    padding: 14px 16px;
    overflow-x: auto;
}
.code-block code {
    background: none;
    padding: 0;
    font-size: 13px;
    font-family: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', monospace;
    line-height: 1.55;
    color: var(--text-1);
}
.code-lang {
    position: absolute;
    top: 6px;
    left: 12px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-3);
    pointer-events: none;
}
.code-copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-3);
    border: 1px solid var(--border-light);
    color: var(--text-3);
    border-radius: 6px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.15s;
    z-index: 1;
}
.code-block:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { background: var(--bg-4); color: var(--text-1); border-color: var(--text-3); }
.code-copy-btn.copied { color: var(--success); border-color: var(--success); }

/* === v2.0: Table rendering === */
.table-wrap {
    overflow-x: auto;
    margin: 12px 0;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
}
.message-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.message-content table th {
    background: var(--bg-3);
    padding: 8px 12px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    color: var(--text-1);
    border-bottom: 1px solid var(--border-light);
}
.message-content table td {
    padding: 7px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-1);
}
.message-content table tr:last-child td { border-bottom: none; }
.message-content table tr:hover td { background: var(--bg-hover); }

/* === v2.0: Error banner === */
.error-banner {
    padding: 12px 16px;
    background: var(--danger-soft);
    border: 1px solid rgba(248,113,113,0.2);
    border-radius: var(--radius);
    color: var(--danger);
    font-size: 13px;
    margin: 20px 0;
}

/* === v2.0: Improved mobile === */
@media (max-width: 480px) {
    .stat-cards { grid-template-columns: 1fr 1fr; }
    .admin-card { padding: 14px; }
    .admin-layout { padding: 16px; }
    .admin-layout h1 { font-size: 17px; }
    .agent-grid { grid-template-columns: 1fr; }
    .data-table { font-size: 12px; }
    .data-table th, .data-table td { padding: 8px 8px; }
    .modal-box { padding: 16px; }
    .input-box { border-radius: var(--radius); padding: 6px 8px 6px 12px; }
    .messages-inner { padding: 0 10px; }
}

/* === v1.3: Locked model badge === */
.model-badge-locked {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-3);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    cursor: default;
}
.model-badge-locked svg {
    color: var(--warning);
    flex-shrink: 0;
}

/* === v2.4: File image preview === */
.file-chip-img {
    flex-direction: column;
    padding: 6px;
    max-width: 140px;
    position: relative;
}
.file-chip-img img {
    width: 100%;
    max-height: 80px;
    object-fit: cover;
    border-radius: 4px;
    display: block;
}
.file-chip-img .file-chip-name {
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
    margin-top: 4px;
}
.file-chip-img .remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === v2.5: Message image attachments === */
.msg-images {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}
.msg-image-thumb {
    max-width: 200px;
    max-height: 160px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    object-fit: cover;
    cursor: pointer;
    transition: opacity 0.15s;
}
.msg-image-thumb:hover { opacity: 0.85; }
.msg-file-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--bg-3);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-2);
}

/* === v3.0: Conversation starter buttons === */
.starter-btn {
    padding: 10px 18px;
    background: var(--bg-2);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    color: var(--text-1);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
    max-width: 280px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.starter-btn:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

/* ===== v4: Theme toggle ===== */
.theme-toggle {
    background: none; border: none; color: var(--text-3); cursor: pointer;
    padding: 6px; border-radius: 6px; display: flex; align-items: center; transition: all 0.15s;
}
.theme-toggle:hover { background: var(--bg-3); color: var(--text-1); }

/* ===== v4: Chat tags ===== */
.chat-tag {
    font-size: 10px; padding: 1px 6px; border-radius: 8px;
    background: var(--accent-soft); color: var(--accent); white-space: nowrap;
    max-width: 60px; overflow: hidden; text-overflow: ellipsis;
}
.tag-filter { display: flex; gap: 4px; padding: 4px 10px; flex-wrap: wrap; }
.tag-pill {
    font-size: 10px; padding: 3px 8px; border-radius: 10px; cursor: pointer;
    background: var(--bg-3); color: var(--text-2); border: 1px solid transparent; transition: all 0.12s;
}
.tag-pill:hover, .tag-pill.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

/* ===== v4: Share badge ===== */
.share-badge {
    font-size: 10px; padding: 2px 8px; border-radius: 8px;
    background: var(--success-soft); color: var(--success);
}

/* ===== v4: Shared chat (read-only) ===== */
.shared-layout { max-width: 800px; margin: 0 auto; padding: 24px 20px; min-height: 100vh; }
.shared-header { padding: 16px 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; display: flex; align-items: center; gap: 12px; }
.shared-header h1 { font-size: 18px; font-weight: 600; flex: 1; }
.shared-badge { font-size: 11px; padding: 4px 10px; border-radius: 12px; background: var(--bg-3); color: var(--text-3); }
.shared-msg { margin-bottom: 16px; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--border); }
.shared-msg.user { background: var(--user-bg); }
.shared-msg.assistant { background: var(--bg-1); }
.shared-msg-role { font-size: 11px; color: var(--text-3); margin-bottom: 6px; font-weight: 600; }
.shared-msg-content { font-size: 14px; line-height: 1.7; color: var(--text-1); white-space: pre-wrap; }

/* ===== v4: Mobile polish ===== */
@media (max-width: 768px) {
    .chat-header { gap: 6px; flex-wrap: wrap; }
    .chat-title { font-size: 12px; max-width: 120px; }
    .btn-export { padding: 4px 8px !important; font-size: 10px !important; }
    .model-selector { font-size: 12px; max-width: 160px; }
    .message { padding: 14px 0; }
    .message-avatar { width: 28px; height: 28px; }
    .message-content { font-size: 14px; }
    .empty-state { padding: 40px 16px; }
    .empty-state-icon svg { width: 36px; height: 36px; }
    .starter-btn { padding: 8px 14px; font-size: 12px; }
    .sidebar-footer { flex-wrap: wrap; gap: 8px; }
    .input-box textarea { font-size: 16px; } /* Prevent iOS zoom */
    .guest-topbar { flex-wrap: wrap; gap: 8px; }
    .guest-topbar .gt-actions { width: 100%; justify-content: flex-end; }
    .guest-grid { grid-template-columns: 1fr; }
    .catalog-grid { grid-template-columns: 1fr !important; }
    .public-link-block { padding: 12px !important; }
    .public-link-block input { font-size: 11px !important; }
    .admin-nav { gap: 2px; }
    .admin-nav a { font-size: 11px; padding: 6px 8px; }
    .data-table { display: block; overflow-x: auto; }
}

@media (max-width: 380px) {
    .stat-cards { grid-template-columns: 1fr !important; }
    .sidebar-actions a { padding: 6px; }
}


/* === Image Generation Modal === */
.image-modal {
    position: fixed; inset: 0; z-index: 10000;
    display: flex; align-items: center; justify-content: center;
}
.image-modal-backdrop {
    position: absolute; inset: 0;
    background: rgba(0, 0, 0, 0.6);
}
.image-modal-box {
    position: relative;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: 14px;
    width: 500px; max-width: 92vw; max-height: 90vh;
    display: flex; flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.image-modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border-light);
}
.image-modal-header h3 { margin: 0; font-size: 16px; font-weight: 600; color: var(--text-0); }
.image-modal-close {
    background: none; border: none; color: var(--text-3);
    font-size: 20px; cursor: pointer; padding: 0 8px;
}
.image-modal-close:hover { color: var(--text-0); }
.image-modal-body { padding: 20px; overflow-y: auto; }
.image-modal-body textarea {
    width: 100%; padding: 10px 14px; margin-top: 6px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text-0); font-size: 14px;
    font-family: inherit; resize: vertical; outline: none;
}
.image-modal-body textarea:focus { border-color: var(--accent); }
.image-modal-body select {
    width: 100%; padding: 8px 10px; margin-top: 4px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text-0); font-size: 13px;
    font-family: inherit; outline: none; cursor: pointer;
}
.image-modal-error {
    margin-top: 12px; padding: 10px 14px;
    background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.3);
    border-radius: 8px; color: #ef4444; font-size: 13px;
}
.image-modal-loading {
    margin-top: 12px; padding: 14px;
    background: var(--accent-soft); border: 1px solid var(--accent);
    border-radius: 8px; color: var(--text-1); font-size: 13px;
    text-align: center;
}
.image-modal-footer {
    display: flex; gap: 10px; justify-content: flex-end;
    padding: 14px 20px; border-top: 1px solid var(--border-light);
}
.image-modal-footer button {
    padding: 9px 20px; font-size: 14px; font-family: inherit;
    border-radius: 8px; cursor: pointer; border: 1px solid transparent;
}
#btn-image { font-size: 18px; }

/* Disabled state for image modal button */
.image-modal .btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}