:root {
    color-scheme: light;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f7f8fb;
    color: #111827;

    --background: #f7f8fb;
    --surface: #fff;
    --surface-muted: #eef2f7;
    --text: #111827;
    --muted: #5b6472;
    --border: #d7dee8;
    --control-border: #7b8799;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --primary-soft: #eff6ff;
    --danger: #b91c1c;
    --danger-dark: #991b1b;
    --danger-soft: #fef2f2;
    --success: #047857;
    --success-soft: #ecfdf5;
    --warning: #92400e;
    --warning-soft: #fffbeb;
    --focus: #0f3d9e;
    --radius: 0.55rem;
    --control-height: 2.75rem;
    --shadow: 0 1px 3px rgb(17 24 39 / 8%);
    --scroll-offset: 5rem;
}

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

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
}

a {
    color: var(--primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
body .ui-button:focus-visible,
body .ui-button.ui-state-focus,
body .ui-inputfield.ui-state-focus,
body .ui-chkbox:focus-within .ui-chkbox-box,
body .ui-dialog .ui-button:focus,
body .ui-datepicker a:focus,
body .ui-datepicker button:focus,
body .ui-datepicker input:focus,
body .ui-messages .ui-messages-close:focus,
body .ui-messages:focus,
.lightweight-message-region:focus {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
    box-shadow: none;
}

:target,
h1,
h2,
h3,
input,
select,
textarea,
button,
[tabindex] {
    scroll-margin-block-start: var(--scroll-offset);
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1000;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    background: var(--text);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 0.9rem 2rem;
    border-bottom: 1px solid var(--border);
    background: rgb(255 255 255 / 94%);
    backdrop-filter: blur(12px);
}

.app-brand {
    display: inline-block;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 750;
    text-decoration: none;
}

.app-subtitle {
    margin: 0.2rem 0 0;
    color: var(--muted);
    font-size: 0.86rem;
}

.app-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
}

.nav-form {
    margin: 0;
}

.app-nav a,
.link-button,
.button-link {
    appearance: none;
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 650;
    line-height: 1;
    text-decoration: none;
}

.app-nav a,
.link-button {
    padding: 0.7rem 0.8rem;
    border: 0;
}

.app-nav a:hover,
.link-button:hover {
    background: var(--surface-muted);
}

.app-nav .current-nav-item {
    background: var(--surface-muted);
    color: var(--primary-dark);
}

.app-nav .nav-action,
.primary-link {
    background: var(--primary);
    color: #fff;
}

.app-nav .nav-action:hover,
.primary-link:hover {
    background: var(--primary-dark);
}

.app-main {
    max-width: 72rem;
    margin: 0 auto;
    padding: 2.25rem;
}

.app-main:focus {
    outline: none;
}

.page-section,
.narrow-section,
.home-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
}

.narrow-section {
    max-width: 32rem;
    margin: 0 auto;
}

.home-layout {
    max-width: 48rem;
}

.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
}

.compact-heading {
    align-items: center;
}

h1,
h2,
h3,
p {
    overflow-wrap: anywhere;
}

.section-header h1,
.narrow-section h1,
.intro-panel h1 {
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.08;
}

.section-header h1 {
    font-size: clamp(2rem, 5vw, 2.75rem);
}

.narrow-section h1 {
    font-size: 2rem;
}

.intro-panel h1 {
    max-width: 42rem;
    font-size: clamp(2.5rem, 8vw, 4rem);
}

.lead-text,
.event-item p,
.form-footer {
    color: var(--muted);
    line-height: 1.6;
}

.lead-text {
    display: block;
    max-width: 43rem;
    margin: 1rem 0 0;
    font-size: 1.05rem;
}

.description-text {
    white-space: pre-wrap;
}

.eyebrow {
    margin: 0 0 0.5rem;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
}

.intro-panel,
.surface-panel,
.ui-panel.surface-panel,
.list-card,
.event-item,
.generated-invitation {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.intro-panel {
    padding: clamp(1.5rem, 5vw, 2.5rem);
}

.feature-list {
    display: grid;
    gap: 0.6rem;
    margin: 2rem 0 0;
    padding-left: 1.25rem;
    color: var(--muted);
    line-height: 1.5;
}

.notice-message {
    padding: 0.9rem 1rem;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    background: var(--surface);
    line-height: 1.5;
}

.action-row,
.item-actions,
.member-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
}

.action-row {
    margin-top: 1.5rem;
}

.compact-actions {
    margin-top: 0;
}

.button-link {
    display: inline-flex;
    min-height: var(--control-height);
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
}

.secondary-link {
    border: 1px solid var(--control-border);
    background: var(--surface);
}

.secondary-link:hover {
    background: var(--surface-muted);
}

.heading-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--muted);
    font-size: 0.86rem;
}

.role-chip {
    display: inline-flex;
    max-width: 100%;
    align-items: center;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    background: var(--success-soft);
    color: var(--success);
    font-size: 0.82rem;
    font-weight: 700;
}

.card-list,
.event-board {
    display: grid;
    gap: 0.75rem;
}

.member-card-list.ui-datalist,
.member-card-list .ui-datalist-content {
    border: 0;
    background: transparent;
}

.member-card-list .ui-datalist-content {
    padding: 0;
}

.member-card-list .ui-datalist-data {
    display: grid;
    margin: 0;
    padding: 0;
    gap: 0.75rem;
    list-style: none;
}

.member-card-list .ui-datalist-item {
    padding: 0;
}

.list-card {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem;
}

.list-card > *,
.event-item > *,
.calendar-workspace > *,
.settings-grid > * {
    min-width: 0;
}

.card-heading {
    margin: 0;
    font-size: 1rem;
    letter-spacing: 0;
}

.secondary-line,
.field-help,
.copy-status,
.subsection-header p,
.empty-state,
.status-line,
.settings-grid .ui-panel-content p {
    color: var(--muted);
}

.secondary-line {
    display: block;
    margin: 0.25rem 0 0;
    font-size: 0.86rem;
    line-height: 1.45;
}

.member-actions {
    justify-content: flex-end;
}

.member-role-label {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.invitation-card {
    align-items: flex-end;
}

.invitation-details {
    flex: 1;
}

.generated-invitation {
    display: grid;
    gap: 0.5rem;
    padding: 1rem;
}

.copy-control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.5rem;
    align-items: start;
    margin-top: 0.6rem;
}

.copy-control .ui-inputfield {
    width: 100%;
    font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

.copy-status {
    grid-column: 1 / -1;
    min-height: 1.25rem;
    margin: 0;
    font-size: 0.86rem;
}

.calendar-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
    gap: 1.25rem;
    align-items: start;
}

.event-list-section {
    min-width: 0;
}

.subsection-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.subsection-header h2,
.panel-heading {
    margin: 0;
    font-size: 1.1rem;
    letter-spacing: 0;
}

.subsection-header p,
.empty-state,
.status-line {
    margin: 0.35rem 0 0;
}

.event-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
}

.event-date {
    display: inline-flex;
    width: 4.25rem;
    min-width: 4.25rem;
    min-height: 3.4rem;
    align-items: center;
    justify-content: center;
    padding: 0.4rem;
    border-radius: var(--radius);
    background: var(--text);
    color: #fff;
    font-weight: 800;
    text-align: center;
}

.event-copy {
    flex: 1;
    min-width: 0;
}

.event-copy h3,
.event-copy p {
    margin: 0;
}

.event-copy p {
    margin-top: 0.35rem;
}

.event-editor {
    position: sticky;
    top: 6.5rem;
    max-height: calc(100vh - 7.5rem);
    overflow-y: auto;
}

.settings-grid,
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    align-items: start;
}

.stacked-form,
.field-stack {
    display: grid;
    gap: 0.75rem;
}

.stacked-form {
    margin-top: 1rem;
}

.panel-heading + .stacked-form {
    margin-top: 0;
}

.two-column-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.checkbox-field,
.status-line {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.status-line {
    font-weight: 700;
}

.status-dot {
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 50%;
}

.status-dot.enabled {
    background: var(--success);
}

.status-dot.disabled {
    background: var(--danger);
}

.field-help {
    margin-top: -0.35rem;
    font-size: 0.86rem;
    line-height: 1.45;
}

.form-footer {
    margin-bottom: 0;
}

.not-found-state {
    padding-top: 4rem;
    text-align: center;
}

.lightweight-panel {
    padding: 1.25rem;
}

.lightweight-messages {
    display: grid;
    gap: 0.5rem;
    margin: 0 0 1rem;
    padding: 0;
    line-height: 1.5;
    list-style: none;
}

.lightweight-messages > li {
    padding: 0.9rem 1rem;
    border: 1px solid currentcolor;
    border-left-width: 4px;
    border-radius: var(--radius);
}

.lightweight-message-info {
    background: var(--success-soft);
    color: var(--success);
}

.lightweight-message-warn {
    background: var(--warning-soft);
    color: var(--warning);
}

.lightweight-message-error,
.lightweight-message-fatal {
    background: var(--danger-soft);
    color: var(--danger);
}

body input.native-input,
body select,
body .ui-inputfield {
    width: 100%;
    min-width: 0;
    min-height: 2.6rem;
    border-color: var(--control-border);
    border-radius: var(--radius);
    color: var(--text);
    font: inherit;
}

body input.native-input,
body select {
    padding: 0.6rem 0.75rem;
    border-style: solid;
    border-width: 1px;
    background: var(--surface);
}

body select:disabled,
body .ui-state-disabled {
    cursor: not-allowed;
}

body input.native-input:hover,
body select:not(:disabled):hover,
body .ui-inputfield.ui-state-hover,
body .ui-chkbox .ui-chkbox-box.ui-state-hover {
    border-color: var(--primary);
}

body input.native-button,
body .ui-button {
    min-height: var(--control-height);
    border-color: var(--primary);
    border-radius: var(--radius);
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 700;
}

body input.native-button {
    padding: 0.7rem 1rem;
    border-style: solid;
    border-width: 1px;
    font: inherit;
}

body input.native-button:hover,
body .ui-button:not(.ui-state-disabled):hover {
    border-color: var(--primary-dark);
    background: var(--primary-dark);
}

body .ui-button.ui-button-outlined {
    border-color: var(--primary);
    background: var(--surface);
    color: var(--primary-dark);
}

body .ui-button.ui-button-outlined:not(.ui-state-disabled):hover {
    border-color: var(--primary-dark);
    background: var(--primary-soft);
    color: var(--primary-dark);
}

body .ui-button.ui-button-secondary.ui-button-outlined {
    border-color: var(--control-border);
    background: var(--surface);
    color: var(--text);
}

body .ui-button.ui-button-danger {
    border-color: var(--danger);
    background: var(--danger);
    color: #fff;
}

body .ui-button.ui-button-danger:not(.ui-state-disabled):hover {
    border-color: var(--danger-dark);
    background: var(--danger-dark);
}

body .ui-button.ui-button-danger.ui-button-outlined {
    border-color: var(--danger);
    background: var(--surface);
    color: var(--danger);
}

body .ui-button.ui-button-danger.ui-button-outlined:not(.ui-state-disabled):hover {
    border-color: var(--danger-dark);
    background: var(--danger-soft);
    color: var(--danger-dark);
}

body .ui-chkbox .ui-chkbox-box {
    border-color: var(--control-border);
}

body .ui-chkbox .ui-chkbox-box.ui-state-active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.ui-panel.surface-panel .ui-panel-content {
    border: 0;
    background: var(--surface);
}

@media (width <= 52rem) {
    :root {
        --scroll-offset: 1rem;
    }

    .app-header,
    .section-header,
    .subsection-header,
    .list-card,
    .event-item {
        align-items: stretch;
        flex-direction: column;
    }

    .app-header {
        position: static;
        padding: 1rem;
    }

    .app-main {
        padding: 1rem;
    }

    .calendar-workspace,
    .settings-grid,
    .form-grid,
    .two-column-fields {
        grid-template-columns: 1fr;
    }

    .event-editor {
        position: static;
        max-height: none;
        overflow: visible;
    }

    .item-actions,
    .item-actions form,
    .item-actions .ui-button,
    .member-actions,
    .member-actions .ui-button {
        width: 100%;
    }

    .invitation-card {
        align-items: stretch;
    }
}

@media (width <= 32rem) {
    .copy-control {
        grid-template-columns: 1fr;
    }

    .copy-control .button-link {
        width: 100%;
    }
}

@media (height <= 48rem) {
    .event-editor {
        position: static;
        max-height: none;
        overflow: visible;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation: none !important;
        transition: none !important;
    }
}

@media (forced-colors: active) {
    .role-chip,
    .status-dot {
        border: 1px solid currentcolor;
    }

    .status-dot {
        background: CanvasText;
    }
}