* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-stack);
    background: var(--page-bg, #eef3f8);
    overflow: hidden;
    color: var(--text-color, #172033);
}

.app-shell {
    display: flex;
    height: 100dvh;
    background: var(--page-bg, #eef3f8);
}

.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#app-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--content-gutter, clamp(14px, 2vw, 24px));
    display: grid;
    align-content: start;
    background: var(--page-bg, #eef3f8);
    min-height: 0;
    gap: 16px;
}

.page-card {
    background: var(--card-bg, #ffffff);
    border: 1px solid color-mix(in oklab, var(--border-color, #dbe3ee) 82%, transparent);
    border-radius: var(--radius-lg, 18px);
    padding: clamp(16px, 2vw, 24px);
    box-shadow: var(--shadow-card-soft);
    color: var(--text-color, #172033);
    backdrop-filter: blur(6px);
}

.main-area > .page-card,
.main-area > section {
    margin: 0;
}

.app-shell main {
    min-height: 0;
    min-width: 0;
}

@media (max-width: 700px) {
    #app-content {
        padding: 12px;
    }

    .page-card {
        padding: 16px;
    }
}