/* Page background for the home layout, 20% darker than the white page token in light mode.
   Cards keep --color-page, so they stand out from the page. brand.css is not changed. */
:root {
    --color-backdrop: #cccccc;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-backdrop: var(--color-page);
    }
}

:root[data-theme="dark"] {
    --color-backdrop: var(--color-page);
}

body {
    background-color: var(--color-backdrop);
}

/* Home app styles. Colors and fonts come from static/custom/css/brand.css. */

/* ---------- Base ---------- */

.skip-link {
    position: absolute;
    left: 1rem;
    top: -4rem;
    padding: 0.5rem 0.9rem;
    background: var(--color-accent);
    color: var(--color-on-accent);
    border-radius: var(--radius);
    z-index: 200;
    text-decoration: none;
}

.skip-link:focus {
    top: 1rem;
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

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

a:hover {
    color: var(--color-accent-hover);
}

[hidden] {
    display: none !important;
}

/* ---------- Header ---------- */

.site-header {
    border-bottom: 1px solid var(--nav-border);
    background: var(--nav-bg);
    backdrop-filter: blur(6px);
}

/* Three columns: the logo and the buttons take the outer columns, so the title is centred on the page. */
.site-header__inner {
    width: min(1100px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1rem 0;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1.5rem;
}

.site-header__logo {
    display: inline-flex;
    justify-self: start;
}

.site-header__title {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 600;
    line-height: 1.2;
    text-align: center;
    color: var(--nav-text);
}

.site-header__nav {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: 1rem;
}

.site-header__link {
    color: var(--nav-text);
    font-weight: 600;
    text-decoration: none;
}

.site-header__link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* ---------- Logo: white on dark, black on light ---------- */

.logo {
    display: block;
    height: 32px;
    width: auto;
}

.logo--dark-bg {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .logo--light-bg {
        display: none;
    }

    :root:not([data-theme="light"]) .logo--dark-bg {
        display: block;
    }
}

:root[data-theme="dark"] .logo--light-bg {
    display: none;
}

:root[data-theme="dark"] .logo--dark-bg {
    display: block;
}

/* ---------- Buttons ---------- */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font: inherit;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.button--primary {
    background: var(--color-accent);
    color: var(--color-on-accent);
}

.button--primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-on-accent);
}

.button--ghost {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.button--ghost:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ---------- Main and headings ---------- */

.site-main {
    flex: 1;
    width: min(1100px, calc(100% - 2rem));
    margin: 0 auto;
    padding: var(--section-space) 0;
}

.apps__heading {
    margin: 0 0 1.5rem;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.apps__empty,
.app-launch__note,
.app-launch__description {
    color: var(--color-muted);
    max-width: 60ch;
}

/* ---------- Application cards ---------- */

.app-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.app-grid__item {
    min-width: 0;
}

/* The placeholder's whole-card link sits under the card's content, so the chat link above it still works. */
.app-card__cover {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.app-card__chat {
    position: relative;
    z-index: 1;
    color: var(--color-accent);
    font-weight: 600;
}

.app-card__chat:hover {
    color: var(--color-accent-hover);
}

/* The image band runs to the card's top, left, and right edges. The card clips it to its rounded corners. */
.app-card {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    overflow: hidden;
    background: var(--color-page);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.app-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 24px -20px rgba(var(--brand-navbar-rgb), 0.7);
    color: var(--color-text);
}

.app-card__media {
    position: relative;
    flex: none;
    aspect-ratio: 4 / 3;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.app-card__image {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    width: calc(100% - 3rem);
    height: calc(100% - 3rem);
    object-fit: contain;
    display: block;
}

.app-card__body {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.5rem;
}

.app-card__name {
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.3;
}

.app-card__description {
    color: var(--color-muted);
    font-size: 1rem;
    line-height: 1.5;
}

/* Sits at the foot of the card, so cards with and without a description line up. */
.app-card__version {
    margin-top: auto;
    color: var(--color-muted);
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
}

@media (max-width: 900px) {
    .app-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .app-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .app-card__image {
        top: 1.25rem;
        left: 1.25rem;
        width: calc(100% - 2.5rem);
        height: calc(100% - 2.5rem);
    }

    .app-card__body {
        padding: 1.25rem;
    }

    /* Phones: logo and buttons share the first row, and the title takes the second row. */
    .site-header__inner {
        grid-template-columns: 1fr auto;
        gap: 0.75rem 1rem;
    }

    .site-header__title {
        grid-column: 1 / -1;
        grid-row: 2;
        font-size: 1.2rem;
    }
}

/* ---------- Messages and errors ---------- */

.messages {
    list-style: none;
    margin: 0 0 1.5rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.messages__item {
    color: var(--color-text);
}

.messages__item--error {
    color: #8a1c1c;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .messages__item--error {
        color: #ffb4b4;
    }
}

.form-error {
    margin: 0 0 1rem;
    color: #8a1c1c;
    font-weight: 600;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .form-error {
        color: #ffb4b4;
    }
}

/* ---------- Popups ---------- */

.popup {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(11, 20, 32, 0.55);
}

.popup__panel {
    width: min(420px, 100%);
    padding: 1.5rem;
    background: var(--color-page);
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    box-shadow: 0 24px 48px -28px rgba(0, 0, 0, 0.6);
}

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

.popup__title {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 600;
}

.popup__text {
    margin: 0 0 1.25rem;
    color: var(--color-muted);
}

.popup__close {
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font: inherit;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
}

.popup__close:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ---------- Forms ---------- */

.form {
    display: grid;
    gap: 1rem;
}

.field {
    display: grid;
    gap: 0.35rem;
}

.field label {
    font-weight: 600;
    font-size: 0.95rem;
}

.field input {
    font: inherit;
    padding: 0.6rem 0.75rem;
    color: var(--color-text);
    background: var(--color-page);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
}

.field input:focus {
    border-color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.form__actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ---------- Footer ---------- */

.site-footer {
    border-top: 1px solid var(--nav-border);
    background: var(--nav-bg);
}

.site-footer__inner {
    width: min(1100px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1.25rem 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
}

.site-footer__copy {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.site-footer__end {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-footer__link {
    font-size: 0.95rem;
}

.back-to-top {
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border-strong);
    border-radius: 50%;
    color: var(--color-text);
    cursor: pointer;
}

.back-to-top:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ---------- Prose (privacy) and error pages ---------- */

.prose {
    max-width: 68ch;
    line-height: 1.7;
}

.prose h1 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 600;
    margin: 0 0 1.5rem;
}

.prose h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.5rem;
}

.prose ul {
    padding-left: 1.2rem;
}

.prose li {
    margin-bottom: 0.6rem;
}

.prose__updated {
    margin-top: 2.5rem;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.error-page {
    display: grid;
    gap: 1rem;
    justify-items: start;
    padding-top: 1rem;
}

.standalone-error .site-main {
    min-height: 60vh;
}

/* ---------- Motion ---------- */

@media (prefers-reduced-motion: reduce) {
    .app-card,
    .button,
    .popup__close,
    .back-to-top {
        transition: none;
    }

    .app-card:hover {
        transform: none;
    }
}