/* =========================
   PAGE LAYOUT
   ========================= */

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-shell {
    min-height: 100vh;
}

.container {
    width: min(100% - 2rem, var(--container-width));
    margin-inline: auto;
}

.site-header {
    border-bottom: 1px solid var(--color-border);
    background: rgba(10, 12, 16, 0.85);
    backdrop-filter: blur(10px);
}

.site-header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    padding: var(--space-6) 0;
}

.site-title {
    font-size: var(--font-size-xl);
    line-height: 1.1;
}

.site-subtitle {
    margin-top: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.site-main {
    padding: var(--space-8) 0;
}

.tracker-layout {
    display: grid;
    grid-template-columns:
        var(--sidebar-width) minmax(0, 900px)
        /* center is now controlled */
        var(--summary-width);
    justify-content: center;
    /* centers the whole layout */
    gap: var(--space-6);
    align-items: start;
}

.tracker-nav,
.tracker-content,
.tracker-summary {
    min-width: 0;
}

.tracker-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.tracker-summary {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

@media (max-width: 1200px) {
    .tracker-layout {
        grid-template-columns: 200px minmax(0, 1fr);
    }

    .tracker-summary {
        grid-column: 1 / -1;
    }
}

@media (max-width: 800px) {
    .site-header__content {
        flex-direction: column;
        align-items: flex-start;
    }

    .tracker-layout {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .card__header--split {
        flex-direction: column;
        align-items: stretch;
    }
}