/* =====================================================================================================================
   App & docs layouts — OPTIONAL 4th stylesheet, linked after components.css by technical pages only:
   web apps (templates/web/app/: sidebar shell, top bar, board, sign-in) and documentation (templates/web/product/docs.html).
   Marketing pages don't need it. Uses tokens only.
   ===================================================================================================================== */

/* App shell: sidebar + main ------------------------------------------------------------------------------------------
   <body class="app"> <aside class="sidebar">…</aside> <div class="app__main"> <header class="topbar">…</header>
   <main class="app__content">…</main> </div> </body>
   Below 64rem the sidebar becomes a top bar whose links scroll horizontally — no JS needed. */

.app {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 100vh;
}

.app__main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.app__content {
    flex: 1;
    width: 100%;
    max-width: var(--container-wide);
    padding: var(--space-6) var(--space-4) var(--space-12);
}

@media (min-width: 64rem) {
    .app { grid-template-columns: var(--sidebar-width) 1fr; }
    .app__content { padding: var(--space-8) var(--space-8) var(--space-16); }
}

/* Sidebar ----------------------------------------------------------------------------------------------------------- */

.sidebar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    overflow-x: auto;
}

.sidebar__brand {
    display: inline-flex;
    flex: none;
}

.sidebar__brand img {
    height: 2.25rem;
    width: auto;
}

.sidebar__section {
    display: contents;
}

.sidebar__title {
    display: none;
}

.sidebar__nav {
    display: flex;
    gap: var(--space-1);
    margin: 0;
    padding: 0;
    list-style: none;
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    text-decoration: none;
    white-space: nowrap;
}

.sidebar__link svg {
    flex: none;
    width: 1.125rem;
    height: 1.125rem;
}

.sidebar__link:hover {
    background: var(--surface-hover);
    color: var(--text);
}

.sidebar__link[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--accent);
}

.sidebar__count {
    margin-left: auto;
    color: var(--text-muted);
    font-size: var(--text-xs);
}

.sidebar__footer {
    display: none;
}

@media (min-width: 64rem) {
    .sidebar {
        position: sticky;
        top: 0;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-6);
        height: 100vh;
        padding: var(--space-6) var(--space-4);
        border-right: 1px solid var(--border);
        border-bottom: 0;
        overflow-y: auto;
    }

    .sidebar__brand { padding-inline: var(--space-2); }
    .sidebar__section { display: block; }

    .sidebar__title {
        display: block;
        margin: 0 0 var(--space-2);
        padding-inline: var(--space-3);
        color: var(--text-muted);
        font-size: var(--text-xs);
        font-weight: var(--weight-bold);
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }

    .sidebar__nav { flex-direction: column; }

    .sidebar__footer {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        margin-top: auto;
        padding: var(--space-3);
        white-space: nowrap;
        border-top: 1px solid var(--border);
        font-size: var(--text-sm);
    }
}

/* Top bar ----------------------------------------------------------------------------------------------------------- */

.topbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-height: 3.75rem;
    padding: var(--space-2) var(--space-4);
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(12px);
}

.topbar__search {
    position: relative;
    flex: 1;
    max-width: 28rem;
}

.topbar__search svg {
    position: absolute;
    top: 50%;
    left: var(--space-3);
    width: 1rem;
    height: 1rem;
    color: var(--text-muted);
    transform: translateY(-50%);
    pointer-events: none;
}

.topbar__search .input {
    min-height: 2.5rem;
    padding-left: var(--space-8);
}

.topbar__search kbd {
    position: absolute;
    top: 50%;
    right: var(--space-3);
    transform: translateY(-50%);
}

.topbar__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
}

@media (min-width: 64rem) {
    .topbar { padding-inline: var(--space-8); }
}

@media (max-width: 40rem) {
    .topbar__search kbd,
    .topbar__label { display: none; }
}

/* Page head: title + actions ---------------------------------------------------------------------------------------- */

.page-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.page-head h1 {
    margin: var(--space-2) 0 0;
    font-size: var(--text-3xl);
}

.page-head p {
    margin: var(--space-1) 0 0;
    color: var(--text-muted);
}

/* Panel — a titled card used in dashboards ------------------------------------------------------------------------- */

.panel {
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
}

.panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.panel__head h2 {
    margin: 0;
    font-size: var(--text-lg);
}

.panel__head a {
    font-size: var(--text-sm);
}

/* Two columns: content + aside (task detail, settings) ------------------------------------------------------------- */

.split {
    display: grid;
    gap: var(--space-6);
}

@media (min-width: 64rem) {
    .split { grid-template-columns: minmax(0, 1fr) 20rem; align-items: start; }
}

/* Board (kanban) — columns scroll horizontally ---------------------------------------------------------------------- */

.board {
    display: grid;
    grid-auto-columns: minmax(16rem, 1fr);
    grid-auto-flow: column;
    gap: var(--space-4);
    overflow-x: auto;
    padding-bottom: var(--space-4);
}

.board__column {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    background: var(--surface-sunken);
}

.board__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-1) var(--space-2);
    font-weight: var(--weight-bold);
}

.board__count {
    color: var(--text-muted);
    font-size: var(--text-sm);
    font-weight: var(--weight-normal);
}

.task-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    color: var(--text);
    font-size: var(--text-sm);
    text-decoration: none;
}

a.task-card:hover {
    border-color: var(--accent);
    color: var(--text);
}

.task-card__title {
    font-weight: var(--weight-medium);
    line-height: var(--leading-snug);
}

.task-card__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    color: var(--text-muted);
    font-size: var(--text-xs);
}

/* Docs: nav · content · on-this-page ------------------------------------------------------------------------------- */

.docs {
    display: grid;
    gap: var(--space-8);
    width: 100%;
    max-width: var(--container-wide);
    margin-inline: auto;
    padding: var(--space-8) var(--space-4) var(--space-16);
}

.docs__nav,
.docs__toc {
    font-size: var(--text-sm);
}

.docs__nav h2,
.docs__toc h2 {
    margin: var(--space-6) 0 var(--space-2);
    color: var(--text-muted);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.docs__nav h2:first-child,
.docs__toc h2:first-child {
    margin-top: 0;
}

.docs__nav ul,
.docs__toc ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.docs__nav a,
.docs__toc a {
    display: block;
    padding: var(--space-1) var(--space-3);
    border-left: 2px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
}

.docs__nav a:hover,
.docs__toc a:hover {
    color: var(--text);
}

.docs__nav a[aria-current="page"] {
    border-left-color: var(--accent);
    color: var(--accent);
    font-weight: var(--weight-medium);
}

.docs__toc {
    display: none;
}

@media (min-width: 64rem) {
    .docs { grid-template-columns: 14rem minmax(0, 1fr); padding-inline: var(--space-8); }
    .docs__nav { position: sticky; top: calc(var(--header-height) + var(--space-8)); align-self: start; }
}

@media (min-width: 80rem) {
    .docs { grid-template-columns: 14rem minmax(0, 1fr) 12rem; }
    .docs__toc { display: block; position: sticky; top: calc(var(--header-height) + var(--space-8)); align-self: start; }
}

/* Sign-in page ------------------------------------------------------------------------------------------------------ */

.auth {
    display: grid;
    grid-template-columns: minmax(0, 1fr);   /* the column never outgrows the screen: no sideways scroll at 390px */
    place-items: center;
    min-height: 100vh;
    padding: var(--space-6) var(--space-4);
    background:
        radial-gradient(60rem 40rem at 100% 0%, color-mix(in srgb, var(--brand-green) 14%, transparent), transparent),
        var(--bg);
}

.auth__card {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    width: 100%;
    max-width: 26rem;
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
}

.auth__card .btn {
    width: 100%;
    white-space: normal;   /* phones: a long label wraps instead of widening the card */
}

@media (min-width: 48rem) {
    .auth__card { padding: var(--space-8); }
    .auth__card .btn { white-space: nowrap; }
}

.auth__divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-muted);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.auth__divider::before,
.auth__divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}