:root {
    --bg-dark: #050513;
    --bg-panel: #13132a;
    --bg-message-user: #2563eb;
    --bg-message-bot: #1f2937;
    --accent: #6366f1;
    --accent-hover: #7c3aed;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border: #2f3342;
    --error: #ef4444;
    --success: #22c55e;
    --shadow: rgba(0, 0, 0, 0.35);
    --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

html, body {
    height: 100%;
    min-height: 0;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.12), transparent 25%),
    radial-gradient(circle at 80% 0%, rgba(139, 92, 246, 0.12), transparent 25%),
    linear-gradient(135deg, #0b0b1d 0%, #0f1124 40%, #0b1020 100%);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    padding: 24px;
    min-height: 0;
}

.app-shell {
    width: 100%;
    display: flex;
    gap: 20px;
    align-items: stretch;
    justify-content: center;
}

.card {
    background: rgba(19, 19, 42, 0.92);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 24px;
    box-shadow: 0 25px 60px -12px var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.04);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-height: 0;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.05));
    opacity: 0.5;
    pointer-events: none;
}

#auth {
    padding: 36px;
    width: 520px;
    max-width: 95vw;
    display: grid;
    gap: 18px;
}

#auth:hover {
    transform: translateY(-4px);
    box-shadow: 0 35px 60px -12px var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.brand {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    align-items: center;
}

.logo {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: var(--gradient);
    display: grid;
    place-items: center;
    color: white;
    font-weight: 800;
    letter-spacing: 1px;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.35);
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 11px;
    color: var(--text-secondary);
    margin: 0;
}

.subtitle {
    margin: 6px 0 0;
    color: var(--text-muted);
    line-height: 1.5;
}

h1 {
    margin: 4px 0 2px;
    color: var(--text-primary);
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.auth-toggle {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 14px;
    padding: 6px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 14px;
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s ease;
}

.toggle.active {
    background: var(--gradient);
    color: white;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.25);
}

.auth-screen {
    display: none;
    animation: fadeIn 0.35s ease;
}

.auth-screen.active {
    display: block;
}

.auth-form {
    display: grid;
    gap: 14px;
}

.field {
    display: grid;
    gap: 6px;
}

.field span {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
}

input, textarea {
    width: 100%;
    margin: 0;
    padding: 14px 16px;
    border: 2px solid transparent;
    background: rgba(10, 10, 20, 0.85);
    border-radius: 14px;
    color: var(--text-primary);
    outline: none;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.25s ease;
    backdrop-filter: blur(10px);
    resize: none;
}

input::placeholder, textarea::placeholder {
    color: var(--text-muted);
}

input:focus, textarea:focus {
    border-color: var(--accent);
    background: rgba(10, 10, 20, 1);
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(99, 102, 241, 0.18);
}

button {
    background: var(--accent);
    color: white;
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
    font-size: 15px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

button:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(124, 58, 237, 0.3);
}

button:hover::before {
    left: 100%;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.primary-action {
    margin-top: 6px;
    width: 100%;
}

.status {
    margin: 4px 0 0;
    font-size: 14px;
    text-align: center;
    min-height: 24px;
    padding: 10px;
    border-radius: 10px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

.status.error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status.success {
    color: var(--success);
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

#chat {
    height: 90vh;
    width: 95%;
    max-width: 1200px;
    padding: 24px;
    background: rgba(19, 19, 42, 0.92);
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px var(--shadow);
    min-height: 0;
}

.chat-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    height: 100%;
    min-height: 0;
}

.chat-sidebar {
    background: rgba(10, 10, 20, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.sidebar-header h2 {
    margin: 2px 0 0;
    font-size: 1.2rem;
}

.secondary-action {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
    border: 1px solid rgba(99, 102, 241, 0.35);
    padding: 10px 14px;
    border-radius: 12px;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
    padding-right: 4px;
}

.chat-list::-webkit-scrollbar {
    width: 6px;
}

.chat-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.chat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 12px;
    border-radius: 14px;
    border: 1px solid transparent;
    background: rgba(15, 15, 35, 0.6);
    cursor: pointer;
    transition: all 0.2s ease;
}

.chat-item:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(19, 19, 42, 0.9);
}

.chat-item.active {
    border-color: rgba(99, 102, 241, 0.7);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.chat-item span {
    font-size: 0.95rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.chat-item button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 6px;
    border-radius: 8px;
    font-size: 14px;
}

.chat-item button:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.persona-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 16px;
    min-height: 0;
}

.persona-header {
    align-items: flex-start;
}

.persona-header-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.persona-status {
    text-align: left;
    margin: 0;
    padding: 10px 12px;
    font-size: 13px;
}

.persona-list {
    display: grid;
    gap: 10px;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 4px;
}

.persona-item {
    background: rgba(15, 15, 35, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: 10px 12px;
    display: grid;
    gap: 8px;
}

.persona-item.active {
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow: 0 8px 18px rgba(99, 102, 241, 0.18);
}

.persona-item h4 {
    margin: 0;
    font-size: 0.98rem;
}

.persona-item p {
    margin: 0;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.persona-item-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.persona-item-actions button {
    padding: 6px 10px;
    font-size: 12px;
    border-radius: 10px;
}

.persona-form {
    display: grid;
    gap: 10px;
    background: rgba(10, 10, 20, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 12px;
}

.persona-form.hidden {
    display: none;
}

.persona-form h3 {
    margin: 0;
    font-size: 1rem;
}

.persona-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.chat-main {
    display: grid;
    grid-template-rows: auto 1fr auto auto;
    row-gap: 15px;
    min-height: 0;
}

#messages {
    grid-row: 2;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
    margin: 0;
    background: rgba(10, 10, 20, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    scroll-behavior: smooth;
    min-height: 0;
}

.input-container {
    grid-row: 3;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-shrink: 0;
    min-height: 70px;
}

.logout-container {
    grid-row: 4;
    text-align: center;
    margin-top: 10px;
}

#messages::-webkit-scrollbar {
    width: 8px;
}

#messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

#messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

#chat h1 {
    flex-shrink: 0;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.msg {
    padding: 16px 20px;
    border-radius: 18px;
    line-height: 1.5;
    max-width: 80%;
    word-wrap: break-word;
    overflow-wrap: break-word;
    animation: fadeIn 0.3s ease;
    position: relative;
    white-space: normal;
    margin: 0;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.msg.user {
    background: var(--bg-message-user);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.msg.bot {
    background: var(--bg-message-bot);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.msg.loading {
    background: var(--bg-message-bot);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 10px 14px;
    max-width: fit-content;
    display: flex;
    align-items: center;
    justify-content: center;
}

.msg-header {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
}

.msg-content {
    display: grid;
    gap: 10px;
}

.msg-content > * {
    margin: 0;
}

.msg-content p {
    margin: 0;
}

.msg-content ul,
.msg-content ol {
    margin: 0;
    padding-left: 20px;
}

.msg-content li {
    margin: 4px 0;
}

.msg-content pre {
    background: rgba(15, 15, 35, 0.9);
    padding: 12px 14px;
    border-radius: 12px;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.msg-content code {
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 0.9em;
}

.msg-content pre code {
    background: transparent;
    padding: 0;
}

.msg-content blockquote {
    margin: 0;
    padding-left: 14px;
    border-left: 3px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
}

.msg-content a {
    color: #93c5fd;
}

.msg-content a:hover {
    color: #bfdbfe;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 16px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: typingAnimation 1.2s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typingAnimation {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

#msgInput {
    flex: 1;
    margin: 0;
    border-radius: 20px;
    padding: 16px 24px;
    min-height: 56px;
    max-height: 120px;
    overflow-y: auto;
}

#send {
    background: var(--accent);
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-size: 18px;
    flex-shrink: 0;
}

#send::after {
    content: "➤";
    font-weight: bold;
}

#send.loading::after {
    content: '';
}

#send.loading {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

#logout {
    background: linear-gradient(135deg, #6b7280, #4b5563);
    border-radius: 12px;
}

.auth-buttons, .logout-container {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.chat-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-title h2 {
    margin: 0;
    font-size: 1.3rem;
}

.icon-button {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 13px;
}

.icon-button:hover {
    background: rgba(255, 255, 255, 0.15);
}

.danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.model-select {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.model-select select {
    background: rgba(15, 15, 35, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
}

.model-select select:hover, .model-select select:focus {
    border-color: var(--accent);
    background: rgba(15, 15, 35, 1);
}

@media (max-width: 1100px) {
    .app-shell {
        flex-direction: column;
        align-items: center;
    }

    #chat {
        width: 95vw;
        height: 85vh;
    }

    .chat-layout {
        grid-template-columns: 1fr;
    }

    .chat-sidebar {
        order: 2;
    }

    .chat-main {
        order: 1;
    }
}

@media (max-width: 768px) {
    body {
        padding: 16px;
    }

    #chat {
        width: 95vw;
        height: 85vh;
        padding: 16px;
    }

    #auth {
        width: 95vw;
        padding: 28px;
    }

    h1 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .brand {
        grid-template-columns: 1fr;
    }

    .logo {
        width: 48px;
        height: 48px;
    }

    #chat {
        padding: 12px;
    }

    #messages {
        padding: 14px;
    }
}

.consent-container {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
    font-size: 0.8rem;
    color: #aaa;
}

.consent-container input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.consent-container label {
    line-height: 1.3;
}

.consent-container a {
    color: #7b87ff;
    text-decoration: none;
}

.consent-container a:hover {
    text-decoration: underline;
}

html, body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

.content {
    width: 100%;
    max-width: 100%;
    padding: 1.5rem;
    box-sizing: border-box;
}

.content * {
    overflow-wrap: break-word;
    word-break: break-word;
}

.hidden { display: none !important; }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(8px);
    display: grid;
    place-items: center;
    z-index: 9999;
    padding: 24px;
}

.modal-card {
    width: min(520px, 95vw);
    background: rgba(19, 19, 42, 0.96);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 20px;
    box-shadow: 0 25px 60px -12px rgba(0,0,0,0.45);
    padding: 16px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}