/* CalCraft web UI. Served as a separate file: the Content Security Policy
   forbids inline styles. No external fonts or frameworks.

   Design tokens: brand blue (#2563eb family, see docs/brand.md), slate
   neutrals, one spacing scale, three radii (controls < cards < login
   card) and subtle shadows. Dark mode follows the system setting. */

:root {
    color-scheme: light dark;

    /* Brand */
    --brand: #2563eb;
    --brand-deep: #1d4ed8;
    --brand-ink: #0f172a;

    /* Surfaces and text */
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --text: #0f172a;
    --text-2: #334155;
    --muted: #5b6b80;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;

    /* Interactive */
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-active: #1e40af;
    --accent-text: #ffffff;
    --accent-soft: #eff6ff;
    --accent-soft-text: #1d4ed8;
    --link: #1d4ed8;
    --focus: rgb(37 99 235 / 0.4);

    /* Status */
    --danger: #b91c1c;
    --danger-soft: #fef2f2;
    --success: #15803d;
    --success-soft: #f0fdf4;
    --warning-bg: #fffbeb;
    --warning-border: #f2c94c;
    --warning-accent: #d97706;

    /* Logo parts */
    --logo-page: var(--brand);
    --logo-band: var(--brand-deep);
    --logo-ring: var(--brand-ink);
    --logo-gap: var(--surface);

    /* Login background (calendar grid) */
    --grid-line: rgb(37 99 235 / 0.07);
    --glow: rgb(37 99 235 / 0.1);

    /* Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgb(15 23 42 / 0.05);
    --shadow: 0 1px 2px rgb(15 23 42 / 0.05), 0 4px 16px rgb(15 23 42 / 0.06);
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --content-width: 960px;
    --gutter: 1.25rem;
    --ease: 120ms ease-out;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --surface: #1e293b;
        --surface-2: #273449;
        --text: #e2e8f0;
        --text-2: #cbd5e1;
        --muted: #9aa8bc;
        --border: #334155;
        --border-strong: #475569;

        --accent: #2563eb;
        --accent-hover: #3b74f0;
        --accent-active: #1d4ed8;
        --accent-text: #ffffff;
        --accent-soft: rgb(59 130 246 / 0.18);
        --accent-soft-text: #bfdbfe;
        --link: #93c5fd;
        --focus: rgb(96 165 250 / 0.55);

        --danger: #fca5a5;
        --danger-soft: rgb(248 113 113 / 0.12);
        --success: #86efac;
        --success-soft: rgb(74 222 128 / 0.1);
        --warning-bg: #33290f;
        --warning-border: #8a6a1c;
        --warning-accent: #f59e0b;

        --logo-ring: #e2e8f0;

        --grid-line: rgb(148 163 184 / 0.07);
        --glow: rgb(37 99 235 / 0.2);

        --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.3);
        --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px rgb(0 0 0 / 0.25);
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.55;
    -webkit-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
}

.layout {
    position: relative;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-5) var(--gutter) var(--space-7);
}

main.narrow {
    max-width: 420px;
    padding-top: var(--space-7);
}

h1,
h2,
h3 {
    color: var(--text);
    line-height: 1.25;
    letter-spacing: -0.011em;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: var(--space-2) 0 var(--space-3);
}

h2 {
    font-size: 1.125rem;
    font-weight: 650;
    margin: var(--space-6) 0 var(--space-3);
}

h3 {
    font-size: 1rem;
    font-weight: 650;
    margin: 0 0 var(--space-2);
}

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

a {
    color: var(--link);
    text-underline-offset: 0.15em;
    text-decoration-thickness: from-font;
}

a:hover {
    text-decoration-thickness: 2px;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--surface-2);
    color: var(--text-2);
    padding: 0.12em 0.4em;
    border-radius: 4px;
}

code.wrap,
.dav-url code {
    word-break: break-all;
}

code.secret {
    font-size: 1em;
    color: var(--text);
    user-select: all;
}

strong {
    font-weight: 650;
}

/* Logo (inline SVG, colors from the tokens above) */

.logo {
    display: block;
    flex: none;
    width: 1.75rem;
    height: 1.75rem;
}

.logo-page {
    fill: var(--logo-page);
}

.logo-band {
    fill: var(--logo-band);
}

.logo-gap {
    fill: var(--logo-gap);
}

.logo-ring {
    fill: var(--logo-ring);
}

.logo-spark {
    fill: #ffffff;
}

/* Header and navigation. The side padding lines the header content up
   with the centered main column. */

.topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2) var(--space-5);
    padding: 0.7rem max(var(--gutter), calc((100% - var(--content-width)) / 2 + var(--gutter)));
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.015em;
    color: var(--text);
}

.topbar nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    flex: 1;
}

.topbar nav a {
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-weight: 500;
    text-decoration: none;
    transition: background-color var(--ease), color var(--ease);
}

.topbar nav a:hover {
    background: var(--surface-2);
    color: var(--text);
}

.topbar nav a.active {
    background: var(--accent-soft);
    color: var(--accent-soft-text);
    font-weight: 600;
}

.user {
    color: var(--muted);
    font-size: 0.9375rem;
}

footer {
    padding: var(--space-4) var(--gutter);
    text-align: center;
    color: var(--muted);
    font-size: 0.8125rem;
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--muted);
}

footer a:hover {
    color: var(--text);
}

/* Login: logo centered above the form, a faint calendar grid behind it. */

.layout:has(> main.login)::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        radial-gradient(ellipse 60% 45% at 50% 0%, var(--glow), transparent 70%),
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 100% 100%, 56px 56px, 56px 56px;
    background-position: center top, center -1px, calc(50% - 28px) 0;
    mask-image: linear-gradient(to bottom, #000 35%, transparent 90%);
    pointer-events: none;
}

main.login {
    max-width: 400px;
    padding-top: clamp(var(--space-6), 10vh, 6rem);
}

.login-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.login-brand .logo {
    width: 4.5rem;
    height: 4.5rem;
    filter: drop-shadow(0 6px 14px rgb(37 99 235 / 0.25));
}

.login-brand .logo-gap {
    fill: var(--bg);
}

.login-name {
    font-size: 1.625rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

main.login h1 {
    text-align: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 0;
    margin: 0 0 var(--space-4);
}

main.login > p {
    text-align: center;
}

main.login .card {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

main.login form button[type="submit"] {
    align-self: stretch;
    padding-block: 0.6rem;
}

/* Forms */

form,
.card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
}

.card > h3 {
    margin: 0;
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-weight: 550;
    font-size: 0.9375rem;
    color: var(--text);
}

label.inline {
    flex-direction: row;
    align-items: center;
    gap: var(--space-2);
    font-weight: 400;
}

input[type="text"],
input[type="password"],
select,
textarea {
    font: inherit;
    font-size: 1rem;
    font-weight: 400;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.7rem;
    min-height: 2.5rem;
    transition: border-color var(--ease), box-shadow var(--ease);
}

textarea {
    resize: vertical;
}

input[type="text"]:hover,
input[type="password"]:hover,
select:hover,
textarea:hover {
    border-color: var(--muted);
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--focus);
}

input[type="checkbox"] {
    accent-color: var(--accent);
    width: 1rem;
    height: 1rem;
    margin: 0;
}

a:focus-visible,
button:focus-visible,
input[type="checkbox"]:focus-visible,
input[type="color"]:focus-visible {
    outline: 2px solid transparent;
    box-shadow: 0 0 0 3px var(--focus);
    border-radius: var(--radius-sm);
}

input[type="color"] {
    width: 3rem;
    height: 2.25rem;
    padding: 2px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    cursor: pointer;
}

input[type="color"]:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

fieldset {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin: 0;
    padding: var(--space-2) var(--space-3) var(--space-3);
}

legend {
    font-weight: 550;
    font-size: 0.9375rem;
    padding: 0 var(--space-1);
}

/* Buttons: primary by default, .secondary and .danger variants. */

button,
a.button {
    font: inherit;
    font-size: 0.9375rem;
    font-weight: 550;
    line-height: 1.4;
    cursor: pointer;
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--accent-text);
    padding: 0.45rem 0.95rem;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--ease), border-color var(--ease), box-shadow var(--ease),
        color var(--ease);
}

button {
    align-self: flex-start;
}

button:hover,
a.button:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

button:active,
a.button:active {
    background: var(--accent-active);
    border-color: var(--accent-active);
}

/* A link that starts a top-level navigation (SSO login), styled as a button. */
a.button {
    display: block;
    text-align: center;
    text-decoration: none;
    padding: 0.6rem 0.95rem;
}

.separator {
    text-align: center;
    margin: 0;
    font-size: 0.875rem;
}

button.secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border-strong);
}

button.secondary:hover {
    background: var(--surface-2);
    border-color: var(--border-strong);
}

button.secondary:active {
    background: var(--border);
}

button.danger {
    background: var(--surface);
    color: var(--danger);
    border-color: var(--border-strong);
}

button.danger:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
}

button.danger:active {
    background: var(--danger-soft);
    border-color: var(--danger);
}

button:disabled,
button:disabled:hover {
    cursor: progress;
    opacity: 0.6;
}

.hint,
.muted {
    color: var(--muted);
    font-weight: 400;
}

.hint {
    font-size: 0.875rem;
    line-height: 1.5;
}

label .hint {
    font-size: 0.8125rem;
}

.small {
    font-size: 0.875rem;
}

.error {
    color: var(--danger);
    margin: 0;
    font-weight: 500;
}

.success {
    color: var(--success);
    font-weight: 500;
}

main.login > .success,
main.login > .error {
    background: var(--success-soft);
    border-radius: var(--radius-sm);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-4);
}

main.login > .error {
    background: var(--danger-soft);
}

/* Notices (recovery codes, one-time passwords, update available). */
.warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-left: 4px solid var(--warning-accent);
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    margin: 0;
    color: var(--text);
}

main > .warning {
    margin-bottom: var(--space-4);
}

.secret-box {
    border-color: var(--warning-border);
    margin-bottom: var(--space-4);
}

/* Lists and tables */

.items {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* Collection card: the collection color runs along the left edge. */
.item {
    position: relative;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-4) var(--space-5) var(--space-4) calc(var(--space-5) + 2px);
    box-shadow: var(--shadow-sm);
}

.item p {
    margin: var(--space-2) 0 0;
}

.item-head {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.item-title {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.item-title strong {
    font-size: 1.0625rem;
    overflow-wrap: anywhere;
}

.item-title .muted {
    font-size: 0.875rem;
}

.dav-url {
    font-size: 0.875rem;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.swatch {
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
}

.swatch.none {
    background: var(--border-strong);
}

.description {
    white-space: pre-wrap;
    color: var(--text-2);
}

.edit,
.confirm {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border);
}

.confirm {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
}

.confirm p {
    flex-basis: 100%;
    margin: 0;
    font-weight: 500;
}

.confirm-inline {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
}

/* Trash: usage and "empty trash" above the list. */
.trash-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2) var(--space-3);
    margin-bottom: var(--space-3);
}

.trash-confirm {
    flex-direction: row;
    margin: 0 0 var(--space-3);
    padding: var(--space-4);
    border-top: 1px solid var(--border);
}

/* No color accent: keep the padding even on both sides. */
.trash-item {
    padding-left: var(--space-5);
}

/* Two buttons: on narrow screens they move below the title. */
.trash-item .item-head {
    flex-wrap: wrap;
}

.trash-item .item-title {
    flex: 1 1 14rem;
}

.trash-target select {
    flex: 1 1 12rem;
    width: auto;
}

.trash-more {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2) var(--space-3);
    margin-top: var(--space-3);
}

/* Empty lists: an outlined placeholder instead of a lone line of text. */
.empty {
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: var(--space-5) var(--space-4);
    text-align: center;
    margin: 0;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

th,
td {
    text-align: left;
    padding: 0.65rem var(--space-4);
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

tbody tr:last-child td {
    border-bottom: 0;
}

th {
    vertical-align: bottom;
    background: var(--surface-2);
    font-size: 0.8125rem;
    color: var(--muted);
    font-weight: 600;
}

td .actions {
    align-items: center;
    justify-content: flex-end;
}

td button {
    font-size: 0.875rem;
    padding: 0.3rem 0.7rem;
}

tr.disabled td {
    color: var(--muted);
}

.facts {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: var(--space-2) var(--space-4);
    margin: 0;
}

.facts dt {
    color: var(--muted);
}

.facts dd {
    margin: 0;
    min-width: 0;
}

.facts dd .hint {
    display: block;
    margin-top: 0.15rem;
}

/* Small label next to a value, e.g. "SSO" in the user list. */
.badge {
    display: inline-block;
    margin-left: var(--space-2);
    padding: 0.05rem 0.45rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-soft-text);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    vertical-align: 0.05em;
    white-space: nowrap;
}

.codes {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
    gap: var(--space-2);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

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

@media (max-width: 600px) {
    :root {
        --gutter: 0.75rem;
    }

    /* Compact header: brand, user and logout on one row, the navigation
       as a horizontally scrollable row below. */
    .topbar {
        padding: 0.5rem 0.75rem 0.4rem;
        gap: 0.4rem 0.75rem;
    }

    .brand {
        font-size: 1rem;
    }

    .brand .logo {
        width: 1.5rem;
        height: 1.5rem;
    }

    .user {
        margin-left: auto;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .topbar > button {
        align-self: center;
        padding: 0.25rem 0.7rem;
    }

    .topbar nav {
        order: 1;
        flex: 1 0 100%;
        flex-wrap: nowrap;
        overflow-x: auto;
        margin: 0 -0.75rem;
        padding: 0 0.75rem;
    }

    .topbar nav a {
        flex: none;
        white-space: nowrap;
    }

    main {
        padding: var(--space-3) var(--gutter) var(--space-6);
    }

    main.narrow {
        padding-top: var(--space-6);
    }

    h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: var(--space-4);
    }

    .item {
        padding: var(--space-3) var(--space-4) var(--space-3) calc(var(--space-4) + 2px);
    }

    .item-head {
        flex-wrap: wrap;
    }

    /* Wide tables scroll inside their frame instead of widening the page. */
    table {
        display: block;
        overflow-x: auto;
    }

    th,
    td {
        padding: 0.45rem 0.5rem;
    }

    td button {
        white-space: nowrap;
    }
}