:root {
    --arca-action: #5b5fc7;
    --arca-action-hover: #4f52b2;
    --arca-action-pressed: #444791;
    --arca-shell: #ffffff;
    --arca-surface: #faf9f8;
    --arca-surface-muted: #f5f5f5;
    --arca-surface-strong: #f0f0f8;
    --arca-text: #242424;
    --arca-text-muted: #616161;
    --arca-text-soft: #8a8886;
    --arca-border: #e0e0e0;
    --arca-border-subtle: #edebe9;
    --arca-selected: #e8e8f5;
    --arca-danger: #c4314b;
    --arca-danger-hover: #a4262c;
    --arca-success: #107c10;
    --arca-warning: #986f0b;
    --arca-info: #0078d4;
    --arca-radius-sm: 4px;
    --arca-radius-md: 6px;
    --arca-radius-lg: 8px;
    --arca-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.08);
    --arca-shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
    --arca-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.18);
    --arca-transition: 200ms ease;
    --arca-rail-width: 68px;
    --arca-rail-mobile-width: 52px;
    --arca-topbar-height: 48px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.4;
    color: var(--arca-text);
    background: var(--arca-surface-muted);
    -webkit-font-smoothing: antialiased;
}

.plain-host {
    min-height: 100vh;
}

a {
    color: var(--arca-action);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid var(--arca-border);
    border-radius: var(--arca-radius-sm);
    background: var(--arca-shell);
    color: var(--arca-text);
    padding: 9px 12px;
    outline: none;
    transition: border-color var(--arca-transition), box-shadow var(--arca-transition), background var(--arca-transition);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--arca-action);
    box-shadow: 0 0 0 1px var(--arca-action);
}

textarea {
    min-height: 120px;
    resize: vertical;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl {
    margin: 0;
}

ul,
ol {
    padding-left: 18px;
}

.btn-primary,
.btn-outline,
.btn-ghost,
.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: var(--arca-radius-sm);
    border: none;
    font-weight: 600;
    transition: all var(--arca-transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--arca-action);
    color: #ffffff;
    padding: 10px 20px;
}

.btn-primary:hover {
    background: var(--arca-action-hover);
    text-decoration: none;
}

.btn-primary:active {
    background: var(--arca-action-pressed);
}

.btn-outline {
    background: var(--arca-shell);
    border: 1px solid var(--arca-border);
    color: var(--arca-text);
    padding: 8px 16px;
}

.btn-outline:hover {
    background: var(--arca-surface-muted);
    text-decoration: none;
}

.btn-ghost {
    background: transparent;
    color: var(--arca-text-muted);
    padding: 6px 10px;
}

.btn-ghost:hover {
    background: var(--arca-surface-muted);
    color: var(--arca-text);
    text-decoration: none;
}

.btn-danger {
    background: var(--arca-danger);
    color: #ffffff;
    padding: 8px 16px;
}

.btn-danger:hover {
    background: var(--arca-danger-hover);
    text-decoration: none;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
}

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

.input-wrap input,
.input-wrap textarea,
.input-wrap select {
    padding-right: 40px;
}

.toggle-pw {
    position: absolute;
    right: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--arca-radius-sm);
    background: transparent;
    color: var(--arca-text-muted);
}

.toggle-pw:hover {
    background: var(--arca-surface-muted);
    color: var(--arca-text);
}

.form-error {
    display: none;
    margin-top: 4px;
    font-size: 12px;
    color: var(--arca-danger);
}

.form-error.show {
    display: block;
}

.field-errors {
    display: grid;
    gap: 4px;
    margin-top: 6px;
    padding-left: 18px;
    color: var(--arca-danger);
}

.field-errors li {
    font-size: 12px;
}

.status-message {
    padding: 12px 14px;
    border-radius: var(--arca-radius-md);
    font-size: 13px;
    line-height: 1.5;
}

.status-message.info {
    background: #f0f4ff;
    border: 1px solid #d6e0f5;
    color: var(--arca-text-muted);
}

.status-message.success {
    background: #e3f2e8;
    border: 1px solid #cfe8d4;
    color: var(--arca-success);
}

.status-message.warning {
    background: #fff4ce;
    border: 1px solid #eedb94;
    color: var(--arca-warning);
}

.status-message.danger {
    background: #fde7e9;
    border: 1px solid #f4c7ce;
    color: var(--arca-danger);
}

.auth-screen,
.vault-unlock-screen,
.plain-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f0f0f8 0%, #e8e8f0 100%);
    padding: 32px 16px;
}

.auth-card,
.vault-unlock-card,
.plain-card {
    width: 420px;
    max-width: 94vw;
    background: var(--arca-shell);
    border-radius: var(--arca-radius-lg);
    box-shadow: var(--arca-shadow-lg);
    padding: 40px 36px 36px;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.auth-logo svg {
    width: 36px;
    height: 36px;
}

.auth-logo span {
    font-size: 22px;
    font-weight: 700;
    color: #6264a7;
    letter-spacing: -0.3px;
}

.auth-subtitle {
    color: var(--arca-text-muted);
    margin-bottom: 28px;
    font-size: 13px;
}

.auth-toggle {
    display: flex;
    background: var(--arca-surface-muted);
    border-radius: var(--arca-radius-sm);
    padding: 2px;
    margin-bottom: 24px;
}

.auth-toggle a {
    flex: 1;
    padding: 8px 0;
    border-radius: 3px;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--arca-text-muted);
    transition: all var(--arca-transition);
}

.auth-toggle a.active {
    background: var(--arca-shell);
    box-shadow: var(--arca-shadow-sm);
    color: var(--arca-text);
    text-decoration: none;
}

.auth-footer {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: var(--arca-text-muted);
}

.auth-footer a {
    font-weight: 600;
}

.vault-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, #6264a7 0%, #5b5fc7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.vault-icon svg {
    width: 32px;
    height: 32px;
}

.vault-unlock-title {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.vault-unlock-subtitle {
    margin-bottom: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--arca-text-muted);
    line-height: 1.5;
}

.vault-unlock-user {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-bottom: 22px;
    background: var(--arca-surface);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
}

.vault-unlock-user .user-info {
    flex: 1;
    min-width: 0;
}

.vault-unlock-user .user-name {
    font-size: 13px;
    font-weight: 600;
}

.vault-unlock-user .user-email {
    font-size: 12px;
    color: var(--arca-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.vault-unlock-hint {
    display: flex;
    gap: 10px;
    padding: 12px 14px;
    margin-top: 20px;
    background: #f0f4ff;
    border: 1px solid #d6e0f5;
    border-radius: var(--arca-radius-md);
    color: var(--arca-text-muted);
    font-size: 12px;
    line-height: 1.5;
}

.vault-unlock-hint svg {
    flex-shrink: 0;
    color: var(--arca-info);
}

.vault-unlock-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--arca-border-subtle);
    text-align: center;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.left-rail {
    width: var(--arca-rail-width);
    min-width: var(--arca-rail-width);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 0;
    background: var(--arca-shell);
    border-right: 1px solid var(--arca-border-subtle);
}

.rail-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin-bottom: 20px;
}

.rail-logo a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: inherit;
    text-decoration: none;
}

.rail-logo svg {
    width: 28px;
    height: 28px;
}

.rail-logo span {
    font-size: 9px;
    font-weight: 700;
    color: #6264a7;
    letter-spacing: 0.5px;
}

.rail-nav,
.rail-bottom {
    width: 100%;
    padding: 0 6px;
}

.rail-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.rail-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 4px 8px;
    border-radius: var(--arca-radius-md);
    color: var(--arca-text-muted);
    text-align: center;
    transition: all var(--arca-transition);
    text-decoration: none;
}

.rail-item:hover {
    background: var(--arca-surface-muted);
    color: var(--arca-text);
    text-decoration: none;
}

.rail-item.active {
    background: var(--arca-selected);
    color: var(--arca-action);
}

.rail-item.active::before {
    content: "";
    position: absolute;
    left: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--arca-action);
    border-radius: 0 2px 2px 0;
}

.rail-item svg {
    width: 22px;
    height: 22px;
}

.rail-item span {
    font-size: 10px;
    font-weight: 600;
    line-height: 1.1;
}

.rail-item-button {
    width: 100%;
    border: none;
    background: transparent;
}

.rail-avatar-wrap {
    position: relative;
}

.rail-avatar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 4px;
    border: none;
    background: transparent;
    border-radius: var(--arca-radius-md);
    cursor: pointer;
    transition: background var(--arca-transition);
    width: 100%;
}

.rail-avatar:hover {
    background: var(--arca-surface-muted);
}

.rail-avatar span {
    font-size: 10px;
    color: var(--arca-text-muted);
    font-weight: 600;
}

.avatar-circle {
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #6264a7;
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.presence {
    position: absolute;
    right: -1px;
    bottom: -1px;
    width: 10px;
    height: 10px;
    border: 2px solid var(--arca-shell);
    border-radius: 50%;
    background: var(--arca-success);
}

/* Avatar dropdown menu — opens to the right */
.avatar-menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 199;
}

.avatar-menu {
    position: absolute;
    left: calc(100% + 8px);
    bottom: 0;
    width: 240px;
    background: var(--arca-shell);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
    box-shadow: var(--arca-shadow-lg);
    z-index: 200;
    padding: 8px 0;
    animation: avatarMenuIn 150ms ease;
}

@keyframes avatarMenuIn {
    from { opacity: 0; transform: translateX(-4px); }
    to { opacity: 1; transform: translateX(0); }
}

.avatar-menu-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px 10px;
}

.avatar-menu-header .avatar-circle {
    width: 36px;
    height: 36px;
    font-size: 14px;
}

.avatar-menu-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.avatar-menu-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--arca-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.avatar-menu-email {
    font-size: 11px;
    color: var(--arca-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.avatar-menu-divider {
    height: 1px;
    background: var(--arca-border-subtle);
    margin: 4px 0;
}

.avatar-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 14px;
    border: none;
    background: transparent;
    color: var(--arca-text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--arca-transition);
}

.avatar-menu-item:hover {
    background: var(--arca-surface-muted);
}

.avatar-menu-item svg {
    color: var(--arca-text-muted);
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--arca-surface);
}

.page {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.topbar {
    min-height: var(--arca-topbar-height);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 20px;
    background: var(--arca-shell);
    border-bottom: 1px solid var(--arca-border-subtle);
}

.topbar-title {
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
}

.topbar-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.topbar-search svg {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--arca-text-muted);
    pointer-events: none;
}

.topbar-search input {
    padding: 7px 12px 7px 34px;
    font-size: 13px;
    background: var(--arca-surface-muted);
}

.topbar-search input:focus {
    background: var(--arca-shell);
}

.topbar-search input::placeholder {
    color: var(--arca-text-soft);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.page-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.filter-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 16px 20px 0;
}

.segmented {
    display: inline-flex;
    background: var(--arca-shell);
    border: 1px solid var(--arca-border);
    border-radius: var(--arca-radius-sm);
    overflow: hidden;
}

.segmented button {
    border: none;
    border-right: 1px solid var(--arca-border);
    background: transparent;
    color: var(--arca-text-muted);
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
}

.segmented button:last-child {
    border-right: none;
}

.segmented button:hover {
    background: var(--arca-surface-muted);
    color: var(--arca-text);
}

.segmented button.active {
    background: var(--arca-action);
    color: #ffffff;
}

.segmented button.active:hover {
    background: var(--arca-action-hover);
}

.item-count {
    font-size: 13px;
    color: var(--arca-text-muted);
}

.settings-tabs {
    display: flex;
    gap: 2px;
    padding: 0 20px;
    background: var(--arca-shell);
    border-bottom: 1px solid var(--arca-border-subtle);
    overflow-x: auto;
}

.settings-tab {
    position: relative;
    padding: 12px 16px;
    color: var(--arca-text-muted);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    text-decoration: none;
}

.settings-tab:hover {
    color: var(--arca-text);
    text-decoration: none;
}

.settings-tab.active {
    color: var(--arca-action);
}

.settings-tab.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 12px;
    right: 12px;
    height: 3px;
    border-radius: 2px 2px 0 0;
    background: var(--arca-action);
}

.settings-card {
    margin-bottom: 16px;
    padding: 24px;
    background: var(--arca-shell);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-lg);
}

.settings-card h3 {
    margin-bottom: 4px;
    font-size: 16px;
    font-weight: 700;
}

.settings-card p {
    color: var(--arca-text-muted);
    font-size: 13px;
    margin-bottom: 16px;
}

.settings-page,
.vault-page {
    display: grid;
    gap: 16px;
}

.settings-page-grid,
.vault-page-grid {
    display: grid;
    gap: 16px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.profile-avatar {
    width: 68px;
    height: 68px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6264a7 0%, #5b5fc7 100%);
    color: #ffffff;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.04em;
    box-shadow: var(--arca-shadow-md);
}

.profile-info h2 {
    margin-bottom: 4px;
    font-size: 22px;
    letter-spacing: -0.03em;
}

.profile-info p {
    margin: 0;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.metric-card {
    padding: 16px;
    background: var(--arca-surface);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
}

.metric-card .metric-label {
    display: block;
    margin-bottom: 6px;
    color: var(--arca-text-muted);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.metric-card .metric-value {
    display: block;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.metric-card .metric-caption {
    margin-top: 8px;
    color: var(--arca-text-muted);
    font-size: 12px;
}

.readonly-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.readonly-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
}

.readonly-value {
    display: block;
    min-height: 42px;
    padding: 11px 12px;
    background: var(--arca-surface);
    border: 1px solid var(--arca-border);
    border-radius: var(--arca-radius-sm);
    color: var(--arca-text);
}

.stack {
    display: grid;
    gap: 16px;
}

.inline-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.provider-list,
.session-list {
    display: grid;
    gap: 12px;
}

.provider-item,
.session-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--arca-surface);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
}

.provider-icon,
.session-icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--arca-surface-strong);
    color: var(--arca-action);
    font-weight: 700;
}

.session-icon svg {
    width: 20px;
    height: 20px;
}

.provider-info,
.session-info {
    min-width: 0;
    flex: 1;
}

.provider-info h4,
.session-info h4 {
    margin-bottom: 4px;
    font-size: 14px;
    font-weight: 700;
}

.provider-info p,
.session-info p {
    margin: 0;
    color: var(--arca-text-muted);
    font-size: 12px;
}

.session-current {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 12px;
    background: #e5f0fa;
    color: var(--arca-info);
    font-size: 12px;
    font-weight: 700;
}

.code-callout {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    padding: 4px 8px;
    background: var(--arca-surface);
    border: 1px solid var(--arca-border-subtle);
    border-radius: 4px;
    color: var(--arca-text-muted);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 12px;
    overflow-wrap: anywhere;
}

.settings-highlight-card {
    border-left: 3px solid var(--arca-action);
    padding-left: 21px;
}

.settings-warning-card {
    border-left: 3px solid var(--arca-warning);
    padding-left: 21px;
}

.settings-danger-card {
    border-left: 3px solid var(--arca-danger);
    padding-left: 21px;
}

.card-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.card-heading svg {
    width: 18px;
    height: 18px;
    color: var(--arca-action);
}

.card-heading.warning svg {
    color: var(--arca-warning);
}

.card-heading.danger svg {
    color: var(--arca-danger);
}

.vault-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.vault-page-copy h2 {
    margin-bottom: 4px;
    font-size: 22px;
    letter-spacing: -0.03em;
}

.vault-page-copy p {
    color: var(--arca-text-muted);
}

.vault-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.vault-stat-card {
    padding: 14px 16px;
    background: var(--arca-shell);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
}

.vault-stat-card strong {
    display: block;
    margin-bottom: 4px;
    font-size: 18px;
    font-weight: 700;
}

.vault-stat-card span {
    color: var(--arca-text-muted);
    font-size: 12px;
}

.vault-composer {
    display: grid;
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr) auto;
    gap: 12px;
    align-items: end;
}

.vault-empty {
    padding: 28px 20px;
    background: var(--arca-shell);
    border: 1px dashed var(--arca-border);
    border-radius: var(--arca-radius-lg);
    text-align: center;
    color: var(--arca-text-muted);
}

.vault-item-header,
.file-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.vault-item-header h3,
.file-card-header h3 {
    margin-bottom: 4px;
    font-size: 16px;
}

.vault-item-meta,
.file-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--arca-text-muted);
    font-size: 12px;
}

.vault-item-body,
.file-card-body {
    display: grid;
    gap: 14px;
}

.vault-item-actions,
.file-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.stacked-form {
    display: grid;
    gap: 16px;
}

.note-copy {
    color: var(--arca-text-muted);
    font-size: 12px;
    line-height: 1.6;
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--arca-border-subtle);
}

.settings-row:last-child {
    border-bottom: none;
}

.row-label h4 {
    font-size: 14px;
    font-weight: 600;
}

.row-label p {
    margin: 2px 0 0;
    font-size: 12px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge.green {
    background: #e3f2e8;
    color: var(--arca-success);
}

.badge.yellow {
    background: #fff4ce;
    color: var(--arca-warning);
}

.badge.red {
    background: #fde7e9;
    color: var(--arca-danger);
}

.badge.blue {
    background: #e5f0fa;
    color: var(--arca-info);
}

.vault-list,
.files-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.vault-card,
.file-card {
    padding: 16px;
    background: var(--arca-shell);
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-md);
}

.drop-zone {
    padding: 36px 20px;
    margin-bottom: 20px;
    border: 2px dashed var(--arca-border);
    border-radius: var(--arca-radius-lg);
    background: var(--arca-shell);
    text-align: center;
    transition: all var(--arca-transition);
}

.drop-zone:hover {
    border-color: var(--arca-action);
    background: #f5f5fa;
}

.drop-zone svg {
    width: 40px;
    height: 40px;
    margin-bottom: 8px;
    color: var(--arca-text-soft);
}

.drop-zone p {
    color: var(--arca-text-muted);
}

.blazor-error-boundary {
    background: #b32121;
    color: #ffffff;
    padding: 1rem;
    border-radius: var(--arca-radius-md);
}

/* Suppress red validation/error outlines on non-interactive elements.
   Blazor can briefly apply error-boundary styles during page load. */
.blazor-error-boundary::after {
    display: none;
}

*:focus:not(:focus-visible) {
    outline: none;
}

h1, h2, h3, h4, h5, h6, section, div, article, header, footer, main, nav {
    outline: none;
}

/* ===== LANDING PAGE ===== */
.landing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--arca-shell);
}

.landing-container {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Landing nav */
.landing-nav {
    border-bottom: 1px solid var(--arca-border-subtle);
}

.landing-nav-inner {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.landing-brand span {
    font-size: 20px;
    font-weight: 700;
    color: #6264a7;
    letter-spacing: -0.3px;
}

.landing-nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Hero */
.landing-hero {
    padding: 80px 0 64px;
    text-align: center;
    background: linear-gradient(180deg, var(--arca-shell) 0%, var(--arca-surface) 100%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    border-radius: 20px;
    background: var(--arca-selected);
    color: var(--arca-action);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.5px;
    color: var(--arca-text);
    margin-bottom: 16px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.6;
    color: var(--arca-text-muted);
    max-width: 560px;
    margin: 0 auto 32px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.btn-lg {
    padding: 12px 28px !important;
    font-size: 15px !important;
}

/* Architecture strip */
.landing-arch {
    padding: 40px 0;
    background: var(--arca-surface);
    border-top: 1px solid var(--arca-border-subtle);
    border-bottom: 1px solid var(--arca-border-subtle);
}

.arch-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.arch-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 20px;
    border-radius: var(--arca-radius-md);
    background: var(--arca-shell);
    border: 1px solid var(--arca-border-subtle);
    min-width: 120px;
}

.arch-step-highlight {
    border-color: var(--arca-action);
    background: var(--arca-selected);
}

.arch-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--arca-surface-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--arca-action);
}

.arch-step-highlight .arch-icon {
    background: var(--arca-action);
    color: #fff;
}

.arch-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--arca-text);
}

.arch-where {
    font-size: 11px;
    font-weight: 600;
    color: var(--arca-text-soft);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.arch-arrow {
    color: var(--arca-text-soft);
    display: flex;
    align-items: center;
}

/* Features */
.landing-features {
    padding: 64px 0 72px;
}

.section-heading {
    text-align: center;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.3px;
    margin-bottom: 40px;
    color: var(--arca-text);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 24px;
    border: 1px solid var(--arca-border-subtle);
    border-radius: var(--arca-radius-lg);
    background: var(--arca-shell);
    transition: box-shadow var(--arca-transition), border-color var(--arca-transition);
}

.feature-card:hover {
    border-color: var(--arca-border);
    box-shadow: var(--arca-shadow-sm);
}

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--arca-selected);
    color: var(--arca-action);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.feature-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--arca-text);
}

.feature-card p {
    font-size: 13px;
    line-height: 1.55;
    color: var(--arca-text-muted);
}

/* Footer */
.landing-footer {
    margin-top: auto;
    padding: 20px 0;
    border-top: 1px solid var(--arca-border-subtle);
    background: var(--arca-surface);
}

.landing-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-footer-brand {
    font-size: 14px;
    font-weight: 700;
    color: #6264a7;
}

.landing-footer-copy {
    font-size: 12px;
    color: var(--arca-text-soft);
}

@media (max-width: 768px) {
    .landing-hero {
        padding: 48px 0 40px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .arch-strip {
        flex-direction: column;
    }

    .arch-arrow {
        transform: rotate(90deg);
    }

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

/* ===== END LANDING PAGE ===== */

@media (max-width: 768px) {
    .left-rail {
        width: var(--arca-rail-mobile-width);
        min-width: var(--arca-rail-mobile-width);
    }

    .rail-item span,
    .rail-logo span,
    .rail-avatar span {
        display: none;
    }

    .topbar-title {
        display: none;
    }

    .topbar-search {
        max-width: none;
    }

    .page-body {
        padding: 12px;
    }

    .filter-row,
    .settings-tabs {
        padding-left: 12px;
        padding-right: 12px;
    }

    .settings-card {
        padding: 18px;
    }

    .vault-composer {
        grid-template-columns: 1fr;
    }

    .provider-item,
    .session-item,
    .vault-page-header,
    .vault-item-header,
    .file-card-header {
        align-items: stretch;
        flex-direction: column;
    }
}