:root {
    --bg: #0f172a;
    --card: #1e293b;
    --panel: #111827;
    --accent: #38bdf8;
    --text: #e2e8f0;
    --muted: #94a3b8;
}

:root[data-theme='light'] {
    --bg: #e8eef7;
    --card: #ffffff;
    --panel: #dfe7f3;
    --accent: #1d4ed8;
    --text: #0b1220;
    --muted: #1f2937;
}

:root[data-theme='light'] .top-bar {
    background: rgba(15, 23, 42, 0.04);
    border-bottom: 1px solid rgba(15, 23, 42, 0.12);
}

:root[data-theme='light'] .menu-toggle,
:root[data-theme='light'] .theme-toggle,
:root[data-theme='light'] .logout,
:root[data-theme='light'] .manage-account,
:root[data-theme='light'] .nav-admin {
    background: rgba(15, 23, 42, 0.06);
    border-color: rgba(15, 23, 42, 0.16);
    color: var(--text);
}

:root[data-theme='light'] .menu-panel {
    background: var(--card);
    border: 1px solid rgba(15, 23, 42, 0.12);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.16);
}

:root[data-theme='light'] .auth-card,
:root[data-theme='light'] .settings-card,
:root[data-theme='light'] .chat-shell,
:root[data-theme='light'] .user-row {
    border: 1px solid rgba(15, 23, 42, 0.1);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
}

:root[data-theme='light'] .language-switcher select,
:root[data-theme='light'] .auth-form input,
:root[data-theme='light'] .settings-form input,
:root[data-theme='light'] .chat-form input {
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid rgba(15, 23, 42, 0.12);
}

:root[data-theme='light'] .chat-log {
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid rgba(15, 23, 42, 0.12);
}

:root[data-theme='light'] .chat-message.assistant {
    background: rgba(15, 23, 42, 0.05);
    border: 1px solid rgba(15, 23, 42, 0.14);
}

:root[data-theme='light'] .chat-message.user {
    border: 1px solid rgba(56, 189, 248, 0.5);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.branding {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
}

.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.app-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    padding: 6px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.app-name {
    letter-spacing: 0.02em;
}

.user-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 0.95rem;
}

.nav-admin {
    color: var(--text);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    font-weight: 600;
}

.nav-admin:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--accent);
}

.username {
    color: var(--muted);
    display: block;
}

.language-switcher {
    margin: 0;
}

.language-switcher select {
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: var(--text);
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
}

.language-switcher select option {
    background: var(--panel);
    color: var(--text);
}

.language-switcher select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.menu-wrapper {
    position: relative;
}

.menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    cursor: pointer;
    font-size: 1.1rem;
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
}

.menu-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    display: none;
    flex-direction: column;
    min-width: 180px;
    padding: 10px;
    gap: 8px;
    z-index: 10;
    font-size: 0.95rem;
    font-weight: 600;
}

.menu-panel.open {
    display: flex;
}

.menu-item {
    width: 100%;
    text-align: left;
    color: var(--text);
    display: block;
    font: inherit;
}

.update-trigger {
    color: #0b1220;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    font: inherit;
    cursor: pointer;
}

.menu-panel .update-trigger {
    width: 100%;
}

.menu-panel .nav-admin {
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    display: block;
    width: 100%;
    font: inherit;
    color: var(--text);
}

.menu-panel .nav-admin:hover {
    background: rgba(255, 255, 255, 0.16);
    color: var(--accent);
}

.update-trigger:hover {
    filter: brightness(1.05);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    padding: 10px 12px;
    font-weight: 600;
    cursor: pointer;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.16);
}

.logout {
    color: var(--text);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    display: inline-block;
}

.logout:hover {
    background: rgba(255, 255, 255, 0.16);
}

.manage-account {
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    display: inline-block;
    font-weight: 600;
}

.manage-account:hover {
    background: rgba(255, 255, 255, 0.16);
    color: var(--accent);
}

main {
    padding: 32px;
    max-width: 960px;
    margin: 0 auto;
}

main.chat-page {
    max-width: 90vw;
}

.auth-card {
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.auth-card h1 {
    margin-top: 0;
    margin-bottom: 12px;
}

.settings-card {
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.settings-card h1 {
    margin-top: 0;
    margin-bottom: 8px;
}

.auth-form {
    display: grid;
    gap: 12px;
}

.auth-form label {
    color: var(--muted);
    font-size: 0.95rem;
}

.settings-form {
    display: grid;
    gap: 12px;
    margin-top: 12px;
}

.form-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.user-list {
    display: grid;
    gap: 16px;
    margin-top: 8px;
}

.user-row {
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
}

.checkbox-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
}

.settings-form label {
    color: var(--muted);
    font-size: 0.95rem;
}

.auth-form input {
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.settings-form input {
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.settings-form textarea {
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    min-height: 140px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    line-height: 1.5;
}

.auth-form button {
    margin-top: 8px;
    padding: 12px 16px;
    border: none;
    border-radius: 12px;
    background: var(--accent);
    color: #0b1220;
    font-weight: 700;
    cursor: pointer;
}

.auth-form button:hover {
    filter: brightness(1.05);
}

.settings-form button {
    margin-top: 8px;
    padding: 12px 16px;
    border: none;
    border-radius: 12px;
    background: var(--accent);
    color: #0b1220;
    font-weight: 700;
    cursor: pointer;
}

.settings-form button:hover {
    filter: brightness(1.05);
}

.status {
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 10px;
    margin-top: 8px;
}

.status.success {
    border-color: rgba(74, 222, 128, 0.4);
    background: rgba(74, 222, 128, 0.1);
}

.helper {
    color: var(--muted);
    margin-top: 12px;
}

.helper a {
    color: var(--accent);
}

.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fecdd3;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 12px;
}

.chat-shell {
    background: var(--card);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
    padding: 20px;
    --chat-font-size: 16px;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.chat-font-controls {
    display: flex;
    gap: 8px;
}

.chat-font-button {
    padding: 6px 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    cursor: pointer;
    font-weight: 600;
}

.chat-font-button:hover {
    background: rgba(255, 255, 255, 0.16);
}

.chat-log {
    height: 420px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    font-family: 'Courier New', Courier, monospace;
    font-size: var(--chat-font-size);
}

.chat-message {
    padding: 12px;
    border-radius: 10px;
    max-width: 80%;
    line-height: 1.45;
}


.chat-message .message-content {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    white-space: pre-wrap;
    word-break: break-word;
}

.chat-message .pretty-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.chat-message .pretty-table th,
.chat-message .pretty-table td {
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    text-align: left;
    position: relative;
}

.chat-message .pretty-table thead {
    background: rgba(255, 255, 255, 0.06);
    font-weight: 700;
}

.chat-message .table-copy-link {
    position: absolute;
    inset: 0;
    opacity: 0;
    text-decoration: none;
}

.chat-message .table-copy-link:focus-visible {
    opacity: 0.25;
    outline: 2px dashed var(--accent);
    outline-offset: -4px;
}

.chat-message.user {
    align-self: flex-end;
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.4);
}

.chat-message.assistant {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-form {
    margin-top: 16px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.chat-form input {
    padding: 12px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 18px;
    font-family: "Courier New", Courier, monospace;
}

.chat-form button {
    padding: 12px 20px;
    border: none;
    border-radius: 12px;
    background: var(--accent);
    color: #0b1220;
    font-weight: 700;
    cursor: pointer;
}

.update-status {
    margin-bottom: 16px;
    color: var(--accent);
    min-height: 20px;
}

.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;
}