* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f4f7fb;
    color: #1d2430;
    font-family: "Segoe UI", Arial, sans-serif;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 28px;
    background: #132238;
    color: #ffffff;
}

.topbar h1,
.topbar p {
    margin: 0;
}

.topbar p {
    color: #a8bfd7;
    margin-top: 4px;
}

.topbar-nav {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.topbar-nav a {
    color: #d9e8f7;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
}

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

.topbar-user {
    color: #d7e6f6;
}

.page-shell {
    padding: 24px 28px 32px;
}

.page-footer-note {
    padding: 0 28px 28px;
    color: #66788c;
    font-size: 13px;
}

details pre {
    margin: 10px 0 0;
    max-width: 520px;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 12px;
    line-height: 1.45;
}

.dashboard-header {
    margin-bottom: 16px;
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-tab,
.thread-card {
    text-decoration: none;
    color: inherit;
}

.filter-tab {
    padding: 10px 14px;
    border-radius: 999px;
    background: #e4edf8;
    color: #35506e;
    font-weight: 600;
}

.filter-tab.active {
    background: #1e88e5;
    color: #ffffff;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 20px;
}

.thread-list,
.thread-detail,
.login-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 18px;
    box-shadow: 0 10px 30px rgba(19, 34, 56, 0.08);
}

.thread-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: calc(100vh - 190px);
    overflow: auto;
}

.thread-card {
    display: block;
    border: 1px solid #dde6f1;
    border-radius: 16px;
    padding: 14px;
    background: #fbfdff;
}

.thread-card.selected {
    border-color: #1e88e5;
    background: #eef6ff;
}

.thread-card-top,
.thread-card-meta,
.conversation-header {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.thread-card-contact {
    margin-top: 6px;
    font-weight: 600;
}

.thread-card-preview {
    margin-top: 8px;
    color: #526274;
}

.thread-card-meta {
    margin-top: 10px;
    color: #7b8c9f;
    font-size: 13px;
}

.conversation-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 18px;
}

.conversation-main,
.conversation-sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.conversation-header h2,
.login-card h2 {
    margin: 0;
}

.conversation-header p {
    margin: 6px 0 0;
    color: #6c7d90;
}

.conversation-actions {
    display: flex;
    align-items: center;
}

.message-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: calc(100vh - 360px);
    overflow: auto;
}

.message-card {
    border-radius: 16px;
    padding: 14px;
}

.message-card.user {
    background: #eef6ff;
    border: 1px solid #cfe2fa;
}

.message-card.admin {
    background: #f4f7f9;
    border: 1px solid #dfe6ec;
}

.message-role {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #4d647f;
}

.message-body {
    margin-top: 8px;
    line-height: 1.5;
}

.message-time {
    margin-top: 10px;
    font-size: 12px;
    color: #75879a;
}

.stack-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stack-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 600;
}

.stack-form input,
.stack-form textarea,
.stack-form button,
button.secondary-button {
    font: inherit;
}

.stack-form input,
.stack-form textarea {
    width: 100%;
    border: 1px solid #d6e0ea;
    border-radius: 12px;
    padding: 12px;
    background: #fbfdff;
}

.stack-form button,
button.secondary-button {
    border: none;
    border-radius: 12px;
    padding: 12px 16px;
    cursor: pointer;
}

.stack-form button {
    background: #1e88e5;
    color: #ffffff;
    font-weight: 700;
}

button.secondary-button {
    background: #e4edf8;
    color: #29445f;
    font-weight: 600;
}

.sidebar-card,
.flash,
.empty-state {
    border-radius: 14px;
    padding: 14px;
    background: #f7fafc;
    border: 1px solid #dde6ef;
}

.sidebar-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.flash-success {
    background: #edf8f1;
    border-color: #cae9d4;
}

.flash-error {
    background: #fff4f3;
    border-color: #f5cbc8;
}

.login-card {
    max-width: 440px;
    margin: 60px auto;
}

.setup-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
    align-items: start;
}

.setup-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 22px;
    box-shadow: 0 10px 30px rgba(19, 34, 56, 0.08);
}

.setup-card h2,
.setup-card h3 {
    margin-top: 0;
}

.setup-card h3 {
    margin-bottom: 0;
}

.setup-sidebar {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.form-grid .full-width {
    grid-column: 1 / -1;
}

.checkbox-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-weight: 600;
}

.checkbox-row input {
    margin-top: 2px;
}

.field-error {
    color: #b42318;
    font-size: 13px;
    font-weight: 600;
}

.sidebar-card code {
    font-family: Consolas, "Courier New", monospace;
    font-size: 13px;
}

.logout-form {
    margin: 0;
}

.inline-form {
    margin: 0;
}

.inline-form-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid #e3ebf3;
    vertical-align: top;
}

.data-table th {
    background: #f4f8fc;
    color: #41576f;
    font-size: 13px;
}

.data-table code {
    font-family: Consolas, "Courier New", monospace;
    font-size: 16px;
    font-weight: 700;
}

button.danger-button {
    border: none;
    border-radius: 12px;
    padding: 10px 14px;
    cursor: pointer;
    font: inherit;
    background: #c73a32;
    color: #ffffff;
    font-weight: 700;
}

@media (max-width: 1080px) {
    .dashboard-grid,
    .conversation-shell,
    .setup-grid {
        grid-template-columns: 1fr;
    }

    .thread-list,
    .message-list {
        max-height: none;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }
}