:root {
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --page-max: 1440px;
    --page-gutter: clamp(14px, 2vw, 32px);
    --form-max: 520px;
    --border: #cfd4dc;
    --muted: #555;
    --link: #2e5f8a;
    --link-hover: #1f4f78;
    --success: #19703f;
    --success-bg: #e7f4ec;
    --success-border: #abd6bd;
    --error: #b42318;
    --error-bg: #fbe9e7;
    --error-border: #efb9b2;
    --header-height: 56px;
    --content-max: 1200px;
}

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

html {
    font-family: Arial, Helvetica, sans-serif;
    accent-color: var(--button);
    color: var(--text);
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    font-size: 16px;
    line-height: 1.45;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    max-width: var(--page-max);
    min-height: var(--header-height);
    margin: 0 auto;
    padding: var(--space-3) var(--page-gutter);
}

.site-brand {
    flex: 0 1 auto;
    min-width: 0;
    font-size: 1.2rem;
    font-weight: 700;
    color: inherit;
}

.site-brand:hover,
.site-brand:focus-visible {
    color: inherit;
}

.site-nav {
    display: flex;
    flex: 1 1 auto;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    text-align: right;
}

.site-nav form {
    display: inline-flex;
    margin: 0;
}

.site-nav-user {
    color: var(--muted);
}

.site-main {
    max-width: var(--page-max);
    margin: 0 auto;
    padding: var(--space-4) var(--page-gutter) var(--space-6);
}

.content {
    max-width: var(--content-max);
}

main {
    max-width: 100%;
}

section {
    margin: var(--space-5) 0;
}

p {
    margin: 0 0 var(--space-3);
}

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

a:hover,
a:focus-visible {
    color: var(--link-hover);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    margin: 1.25em 0 var(--space-3);
}

.content > :first-child {
    margin-top: 0;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.1rem;
}

h5,
h6 {
    font-size: 1rem;
}

button,
input[type="button"],
input[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    min-height: 42px;
    padding: 9px 18px;
    border: 0;
    border-radius: 6px;
    font: inherit;
    font-weight: 700;
    color: var(--button-text);
    background: var(--button);
    cursor: pointer;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

button:hover,
button:focus-visible,
input[type="button"]:hover,
input[type="button"]:focus-visible,
input[type="submit"]:hover,
input[type="submit"]:focus-visible {
    background: var(--button-hover);
}

button.button-secondary,
input[type="button"].button-secondary,
input[type="submit"].button-secondary {
    border: 1px solid var(--button);
    color: var(--button);
    background: var(--bg);
}

button.button-secondary:hover,
button.button-secondary:focus-visible,
input[type="button"].button-secondary:hover,
input[type="button"].button-secondary:focus-visible,
input[type="submit"].button-secondary:hover,
input[type="submit"].button-secondary:focus-visible {
    background: color-mix(in srgb, var(--text) 4%, var(--bg));
}

button.link-button {
    display: inline;
    min-width: 0;
    min-height: 0;
    width: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
    font: inherit;
    font-weight: 400;
    color: var(--link);
    background: transparent;
}

button.link-button:hover,
button.link-button:focus-visible {
    color: var(--link-hover);
    background: transparent;
}

button:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

button:disabled:hover,
button:disabled:focus-visible,
input[type="button"]:disabled:hover,
input[type="button"]:disabled:focus-visible,
input[type="submit"]:disabled:hover,
input[type="submit"]:disabled:focus-visible {
    background: var(--button);
}

button.button-secondary:disabled:hover,
button.button-secondary:disabled:focus-visible,
input[type="button"].button-secondary:disabled:hover,
input[type="button"].button-secondary:disabled:focus-visible,
input[type="submit"].button-secondary:disabled:hover,
input[type="submit"].button-secondary:disabled:focus-visible {
    background: var(--bg);
}

button.link-button:disabled:hover,
button.link-button:disabled:focus-visible {
    color: var(--link);
    background: transparent;
}

:where(input, select, textarea, button):focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
}

label {
    font-weight: 700;
}

fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

legend {
    margin: 0 0 var(--space-2);
    padding: 0;
    font-weight: 700;
}

.choice-list {
    display: grid;
    gap: var(--space-2);
}

.choice-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-weight: 400;
}

.choice-row label {
    font-weight: 400;
}

.choice-row input[type="checkbox"],
.choice-row input[type="radio"] {
    flex: 0 0 auto;
    margin: 0.2em 0 0;
}

:where(input:not([type="hidden"]):not([type="button"]):not([type="submit"]):not([type="checkbox"]):not([type="radio"]),
select,
textarea) {
    width: 100%;
    max-width: 100%;
    padding: 7px 9px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font: inherit;
    color: inherit;
}

textarea {
    min-height: 8rem;
    resize: vertical;
}

pre,
code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre {
    max-width: 100%;
    overflow-x: auto;
    padding: var(--space-3);
    border: 1px solid #d7dbe0;
    border-radius: 5px;
    background: #fafafa;
}

table {
    width: 100%;
    max-width: 100%;
    margin: var(--space-5) 0;
    border-collapse: collapse;
}

th,
td {
    padding: 7px 10px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    font-weight: 700;
    background: #f7f7f7;
}

table form {
    margin: 0;
}

/* Inline notices rendered within page content (form errors, one-off notes). */
.message {
    margin: 0;
}

.message-success {
    color: var(--success);
}

.message-error {
    color: var(--error);
}

/* Flash messages: transient, dismissible banners pinned to the top of the page.
   position: sticky keeps them in normal flow (so they push the page down) while
   pinning them to the top edge once the page is scrolled. */
.content > .flash-container:first-child {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: grid;
    gap: var(--space-2);
    margin: 0 0 var(--space-5);
}

.flash {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0;
    padding: var(--space-2) var(--space-4);
    border: 1px solid transparent;
    border-radius: 6px;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.flash-text {
    flex: 1 1 auto;
}

.flash-good {
    color: var(--success);
    background: var(--success-bg);
    border-color: var(--success-border);
}

.flash-bad {
    color: var(--error);
    background: var(--error-bg);
    border-color: var(--error-border);
}

.flash-close {
    flex: 0 0 auto;
    min-width: 0;
    min-height: 0;
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    border: 0;
    border-radius: 4px;
    font-size: 1.4rem;
    font-weight: 400;
    line-height: 1;
    color: inherit;
    background: transparent;
}

.flash-close:hover,
.flash-close:focus-visible {
    color: inherit;
    background: rgba(0, 0, 0, 0.08);
}

.flash-hiding {
    opacity: 0;
    transform: translateY(-8px);
}

@media (prefers-reduced-motion: reduce) {
    .flash {
        transition: opacity 0.25s ease;
    }

    .flash-hiding {
        transform: none;
    }
}

.stacked-form {
    display: grid;
    gap: var(--space-4);
    max-width: var(--form-max);
    margin: 0 0 var(--space-4);
}

.form-row {
    display: grid;
    gap: var(--space-1);
    align-items: start;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    align-items: center;
    margin-top: var(--space-2);
    padding-left: 0;
}

form + form,
section + form,
.stacked-form + form {
    margin-top: var(--space-4);
}

.api-key-once {
    max-width: 100%;
    overflow-x: auto;
}

@media (max-width: 720px) {
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .form-actions {
        align-items: stretch;
    }

    button,
    input[type="button"],
    input[type="submit"] {
        width: 100%;
    }
}

.eyebrow {
    margin-bottom: var(--space-2);
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.muted,
small {
    color: var(--muted);
}

.intro-card,
.name-gate {
    max-width: 680px;
    padding: clamp(20px, 4vw, 40px);
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel);
}

a.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    min-height: 42px;
    padding: 9px 18px;
    border-radius: 6px;
    color: var(--button-text);
    background: var(--button);
    font-weight: 700;
}

a.button-link:hover,
a.button-link:focus-visible {
    color: var(--button-text);
    background: var(--button-hover);
}

.name-choices {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.meeting-list {
    display: grid;
    gap: var(--space-3);
}

.meeting-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.meeting-card h3 {
    margin: 0 0 var(--space-1);
}

.meeting-url {
    overflow-wrap: anywhere;
}

.copy-row {
    display: flex;
    align-items: stretch;
    gap: var(--space-3);
    max-width: 820px;
}

.copy-row input {
    flex: 1 1 auto;
}

.session-line,
.availability-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-4) 0;
}

.session-line {
    justify-content: flex-start;
    max-width: 720px;
}

.availability-legend span {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.legend-box {
    width: 18px;
    height: 18px;
    border-radius: 4px;
}

.availability-table-wrap {
    max-width: 100%;
    overflow-x: auto;
}

.availability-table {
    width: auto;
    min-width: 640px;
}

.availability-table th,
.availability-table td {
    vertical-align: middle;
    text-align: center;
}

.availability-table th:first-child {
    min-width: 220px;
    text-align: left;
    white-space: normal;
}

.availability-table thead small {
    display: block;
    font-size: 0.7rem;
}

.availability-toggle {
    width: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    border: 1px solid color-mix(in srgb, var(--text) 15%, transparent);
    font-size: 1.15rem;
}

.availability-toggle.is-unavailable,
.legend-box.is-unavailable {
    color: var(--availability-off-text);
    background: var(--availability-off);
}

.availability-toggle.is-available,
.legend-box.is-available,
.all-cell.is-available {
    color: var(--availability-on-text);
    background: var(--availability-on);
}

.availability-toggle:disabled {
    opacity: 0.78;
}

.all-cell {
    min-width: 58px;
    font-size: 1.2rem;
    font-weight: 700;
}

.all-summary {
    font-weight: 700;
}

[data-availability-config] {
    display: none;
}

.date-picker {
    max-width: var(--form-max);
}

.calendar-shell {
    padding: var(--space-3);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.calendar-header {
    display: grid;
    grid-template-columns: 42px 1fr 42px;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    text-align: center;
}

button.calendar-nav {
    width: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    font-size: 1.25rem;
}

.calendar-weekdays,
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--space-1);
}

.calendar-weekdays {
    margin-bottom: var(--space-1);
    color: var(--muted);
    font-size: 0.75rem;
    font-weight: 700;
    text-align: center;
}

button.calendar-day,
.calendar-blank {
    width: 100%;
    min-width: 0;
    min-height: 42px;
    aspect-ratio: 1;
}

button.calendar-day {
    padding: 0;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text);
    background: transparent;
    font-weight: 400;
}

button.calendar-day:hover,
button.calendar-day:focus-visible {
    color: var(--text);
    background: var(--calendar-hover);
}

button.calendar-day.is-today {
    border-color: var(--link);
}

button.calendar-day.is-selected,
button.calendar-day.is-selected:hover,
button.calendar-day.is-selected:focus-visible {
    color: var(--calendar-selected-text);
    background: var(--calendar-selected);
    font-weight: 700;
}

.selected-date-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

button.selected-date-chip {
    width: auto;
    min-width: 0;
    min-height: 34px;
    padding: 5px 9px;
    border: 1px solid var(--border);
    color: var(--text);
    background: var(--panel);
    font-size: 0.9rem;
    font-weight: 400;
}

button.selected-date-chip:hover,
button.selected-date-chip:focus-visible {
    color: var(--text);
    background: var(--calendar-hover);
}

.calendar-error:empty {
    display: none;
}

@media (max-width: 720px) {
    .meeting-card,
    .copy-row {
        align-items: stretch;
        flex-direction: column;
    }

    .meeting-card button,
    .copy-row button,
    a.button-link {
        width: 100%;
    }

    .availability-toggle {
        width: 42px;
    }

    button.calendar-nav {
        width: 42px;
    }

    button.calendar-day {
        width: 100%;
    }

    button.selected-date-chip {
        width: auto;
    }
}