/* ===================================================================
   App shell: fixed rail on desktop, off-canvas drawer below 992px.
   =================================================================== */

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

html {
    -webkit-text-size-adjust: 100%;
}

/* An author `display` declaration outranks the user agent's rule for [hidden],
   so every component that sets display: flex would ignore el.hidden without
   this. Toggling visibility through the attribute keeps it correct for
   assistive tech too, which a display:none class alone would not. */
[hidden] {
    display: none !important;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--ink-700);
    background: var(--surface-page);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    color: var(--ink-900);
    line-height: 1.25;
    margin: 0;
    font-weight: 600;
}

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

/* A visible focus ring on everything. Removing it is on the project's
   anti-pattern list: keyboard users lose their place entirely. */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Skip link: first thing in the tab order, invisible until focused. */
.skip-link {
    position: absolute;
    left: var(--space-3);
    top: -60px;
    z-index: 100;
    padding: var(--space-2) var(--space-4);
    background: var(--primary);
    color: var(--primary-ink);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: top var(--dur-in) var(--ease);
}

.skip-link:focus {
    top: var(--space-3);
}

.app {
    min-height: 100vh;
}

/* --- Left rail ---------------------------------------------------- */

.rail {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-width);
    background: var(--surface-card);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    z-index: 40;
}

.rail__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-4);
    border-bottom: 1px solid var(--line);
    min-height: var(--topbar-height);
}

.rail__mark {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: var(--primary-ink);
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: var(--text-sm);
    letter-spacing: .02em;
}

.rail__name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--ink-900);
    line-height: 1.2;
}

.rail__sub {
    font-size: var(--text-xs);
    color: var(--ink-500);
}

.rail__nav {
    padding: var(--space-3) var(--space-2);
    flex: 1;
    overflow-y: auto;
}

.rail__group-label {
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--ink-400);
    padding: var(--space-4) var(--space-3) var(--space-2);
}

.rail__link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    margin-bottom: 2px;
    border-radius: var(--radius-md);
    color: var(--ink-700);
    text-decoration: none;
    font-weight: 500;
    min-height: 40px;
    transition: background var(--dur-in) var(--ease), color var(--dur-in) var(--ease);
}

.rail__link:hover {
    background: var(--surface-sunken);
    color: var(--ink-900);
}

.rail__link[aria-current="page"] {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
}

.rail__link svg {
    width: 17px;
    height: 17px;
    flex: 0 0 17px;
}

.rail__footer {
    border-top: 1px solid var(--line);
    padding: var(--space-3);
}

.rail__user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2);
}

.rail__avatar {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary);
    display: grid;
    place-items: center;
    font-weight: 600;
    font-size: var(--text-sm);
}

.rail__user-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--ink-900);
    line-height: 1.2;
    overflow-wrap: anywhere;
}

.rail__user-role {
    font-size: var(--text-xs);
    color: var(--ink-500);
}

/* --- Main column -------------------------------------------------- */

.main {
    margin-left: var(--rail-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: var(--space-4);
    min-height: var(--topbar-height);
    padding: var(--space-3) var(--space-5);
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--line);
}

.topbar__title {
    font-size: var(--text-md);
    font-weight: 600;
    color: var(--ink-900);
}

.topbar__sub {
    font-size: var(--text-xs);
    color: var(--ink-500);
}

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

.rail-toggle {
    display: none;
    background: none;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-md);
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    color: var(--ink-700);
    cursor: pointer;
}

.content {
    padding: var(--space-5);
    max-width: 1400px;
    width: 100%;
    flex: 1;
}

.section {
    margin-bottom: var(--space-6);
}

.section__head {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
}

.section__title {
    font-size: var(--text-md);
    font-weight: 600;
}

.section__hint {
    font-size: var(--text-xs);
    color: var(--ink-500);
}

/* --- Grids -------------------------------------------------------- */

.grid {
    display: grid;
    gap: var(--space-4);
}

.grid--kpi {
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.grid--split {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}

.grid--halves {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* --- Responsive --------------------------------------------------- */

@media (max-width: 1200px) {
    .grid--split {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 991.98px) {
    .rail {
        transform: translateX(-100%);
        transition: transform var(--dur-in) var(--ease);
        box-shadow: var(--shadow-float);
    }

    .rail.is-open {
        transform: translateX(0);
    }

    .main {
        margin-left: 0;
    }

    .rail-toggle {
        display: inline-flex;
    }

    .rail-scrim {
        position: fixed;
        inset: 0;
        background: rgba(17, 24, 32, .38);
        z-index: 35;
        border: 0;
        padding: 0;
    }
}

@media (max-width: 767.98px) {
    .content {
        padding: var(--space-4) var(--space-3);
    }

    .topbar {
        padding: var(--space-3);
    }
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}