/* =====================
   Modern light theme CSS
   ===================== */

:root {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --surface: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);

    --primary: #2563eb;
    --primary-700: #1d4ed8;
    --accent: #16a34a;
    --danger: #dc2626;

    --radius: 12px;
    --toolbar-height: 56px;
    --footer-height: 44px;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.toolbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    gap: .75rem;
    align-items: center;
    padding: .7rem 1rem;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
}

.toolbar .brand {
    font-weight: 700;
    letter-spacing: .3px;
    color: var(--text)
}

.toolbar .spacer {
    flex: 1
}

.toolbar input[type="search"] {
    width: 380px;
    max-width: 40vw;
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .5rem .7rem;
    box-shadow: var(--shadow);
}

.toolbar .btn,
.btn {
    background: var(--primary);
    color: #fff;
    border: 0;
    border-radius: 8px;
    padding: .5rem .8rem;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.toolbar .btn.ghost,
.btn.ghost {
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
}

.toolbar .select {
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .45rem .6rem;
    box-shadow: var(--shadow);
}

.app-root {
    padding: 1.25rem;
    min-height: calc(100vh - var(--toolbar-height) - var(--footer-height))
}

.footer {
    display: flex;
    gap: .75rem;
    align-items: center;
    justify-content: flex-end;
    padding: .6rem 1rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    background: var(--panel);
}

#status-indicator {
    color: var(--accent)
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.1rem
}

.tile {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    cursor: pointer;
    transition: transform .05s ease, box-shadow .15s ease;
    outline: none;
    box-shadow: var(--shadow);
}

.tile:hover,
.tile:focus {
    box-shadow: 0 4px 10px rgba(16, 24, 40, .10), 0 2px 4px rgba(16, 24, 40, .06)
}

.tile:active {
    transform: translateY(1px)
}

.tile h3 {
    margin: .2rem 0 .6rem;
    font-size: 1rem;
    font-weight: 600
}

.tile .code {
    color: var(--muted);
    font-size: .85rem
}

.tile .children {
    margin-top: .5rem;
    display: flex;
    flex-wrap: wrap;
    gap: .35rem
}

.badge {
    display: inline-block;
    padding: .18rem .5rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: .8rem;
    background: #fff
}

/* login */
.login-page {
    display: grid;
    place-items: center;
    height: 100%
}

.login-card {
    width: min(380px, 92vw);
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem 1.25rem 1rem;
    box-shadow: var(--shadow);
}

.login-card h1 {
    margin: .2rem 0 1rem;
    font-size: 1.25rem;
    font-weight: 700
}

.login-card label {
    display: block;
    margin: .7rem 0 .25rem;
    color: var(--muted);
    font-size: .85rem
}

.login-card input {
    width: 100%;
    padding: .55rem .65rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    box-shadow: var(--shadow);
}

.form-error {
    color: var(--danger);
    min-height: 1.2rem
}

/* Accessibility focus */
:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .35);
    outline-offset: 2px
}